+++ /dev/null
-/*
- * Copyright (C) 2005 Apple Computer, Inc. All rights reserved.
- * Copyright (C) 2006 Alexey Proskuryakov
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#import "WebTextRenderer.h"
-
-#import <ApplicationServices/ApplicationServices.h>
-#import <Cocoa/Cocoa.h>
-
-#import <WebKit/WebKitLogging.h>
-#import <WebKit/WebNSObjectExtras.h>
-#import <WebKit/WebTextRendererFactory.h>
-#import <WebKit/WebViewPrivate.h>
-#import <WebKitSystemInterface.h>
-
-#import <float.h>
-
-#import <unicode/uchar.h>
-#import <unicode/unorm.h>
-
-// FIXME: FATAL_ALWAYS seems like a bad idea; lets stop using it.
-
-#define SMALLCAPS_FONTSIZE_MULTIPLIER 0.7f
-#define SYNTHETIC_OBLIQUE_ANGLE 14
-
-// Should be more than enough for normal usage.
-#define NUM_SUBSTITUTE_FONT_MAPS 10
-
-// According to http://www.unicode.org/Public/UNIDATA/UCD.html#Canonical_Combining_Class_Values
-#define HIRAGANA_KATAKANA_VOICING_MARKS 8
-
-#define SPACE 0x0020
-#define NO_BREAK_SPACE 0x00A0
-#define ZERO_WIDTH_SPACE 0x200B
-#define POP_DIRECTIONAL_FORMATTING 0x202C
-#define LEFT_TO_RIGHT_OVERRIDE 0x202D
-#define RIGHT_TO_LEFT_OVERRIDE 0x202E
-
-// MAX_GLYPH_EXPANSION is the maximum numbers of glyphs that may be
-// use to represent a single Unicode code point.
-#define MAX_GLYPH_EXPANSION 4
-#define LOCAL_BUFFER_SIZE 2048
-
-// Covers Latin-1.
-#define INITIAL_BLOCK_SIZE 0x200
-
-// Get additional blocks of glyphs and widths in bigger chunks.
-// This will typically be for other character sets.
-#define INCREMENTAL_BLOCK_SIZE 0x400
-
-#define CONTEXT_DPI (72.0)
-#define SCALE_EM_TO_UNITS(X, U_PER_EM) (X * ((1.0 * CONTEXT_DPI) / (CONTEXT_DPI * U_PER_EM)))
-
-typedef float WebGlyphWidth;
-
-struct WidthMap {
- ATSGlyphRef startRange;
- ATSGlyphRef endRange;
- WidthMap *next;
- WebGlyphWidth *widths;
-};
-
-typedef struct GlyphEntry {
- ATSGlyphRef glyph;
- WebTextRenderer *renderer;
-} GlyphEntry;
-
-struct GlyphMap {
- UChar32 startRange;
- UChar32 endRange;
- GlyphMap *next;
- GlyphEntry *glyphs;
-};
-
-typedef struct WidthIterator {
- WebTextRenderer *renderer;
- const WebCoreTextRun *run;
- const WebCoreTextStyle *style;
- unsigned currentCharacter;
- float runWidthSoFar;
- float widthToStart;
- float padding;
- float padPerSpace;
- float finalRoundingWidth;
-} WidthIterator;
-
-typedef struct ATSULayoutParameters
-{
- const WebCoreTextRun *run;
- const WebCoreTextStyle *style;
- ATSUTextLayout layout;
- WebTextRenderer **renderers;
- UniChar *charBuffer;
- bool hasSyntheticBold;
- bool syntheticBoldPass;
- float padPerSpace;
-} ATSULayoutParameters;
-
-static WebTextRenderer *rendererForAlternateFont(WebTextRenderer *, WebCoreFont);
-
-static WidthMap *extendWidthMap(WebTextRenderer *, ATSGlyphRef);
-static ATSGlyphRef extendGlyphMap(WebTextRenderer *, UChar32);
-static void updateGlyphMapEntry(WebTextRenderer *, UChar32, ATSGlyphRef, WebTextRenderer *substituteRenderer);
-
-static void freeWidthMap(WidthMap *);
-static void freeGlyphMap(GlyphMap *);
-static inline ATSGlyphRef glyphForCharacter(WebTextRenderer **, UChar32);
-
-// Measuring runs.
-static float CG_floatWidthForRun(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *,
- float *widthBuffer, WebTextRenderer **rendererBuffer, CGGlyph *glyphBuffer, float *startPosition, int *numGlyphsResult);
-static float ATSU_floatWidthForRun(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *);
-
-// Drawing runs.
-static void CG_draw(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *, const WebCoreTextGeometry *);
-static void ATSU_draw(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *, const WebCoreTextGeometry *);
-
-// Selection point detection in runs.
-static int CG_pointToOffset(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *,
- int x, bool includePartialGlyphs);
-static int ATSU_pointToOffset(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *,
- int x, bool includePartialGlyphs);
-
-// Selection rect.
-static NSRect CG_selectionRect(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *, const WebCoreTextGeometry *);
-static NSRect ATSU_selectionRect(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *, const WebCoreTextGeometry *);
-
-// Drawing highlight.
-static void CG_drawHighlight(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *, const WebCoreTextGeometry *);
-static void ATSU_drawHighlight(WebTextRenderer *, const WebCoreTextRun *, const WebCoreTextStyle *, const WebCoreTextGeometry *);
-
-static bool setUpFont(WebTextRenderer *);
-
-// Iterator functions
-static void initializeWidthIterator(WidthIterator *iterator, WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style);
-static unsigned advanceWidthIterator(WidthIterator *iterator, unsigned offset, float *widths, WebTextRenderer **renderersUsed, ATSGlyphRef *glyphsUsed);
-
-static bool fillStyleWithAttributes(ATSUStyle style, NSFont *theFont);
-static bool shouldUseATSU(const WebCoreTextRun *run);
-
-#if !ERROR_DISABLED
-static NSString *pathFromFont(NSFont *font);
-#endif
-
-static void createATSULayoutParameters(ATSULayoutParameters *params, WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style);
-static void disposeATSULayoutParameters(ATSULayoutParameters *params);
-
-// Globals
-static bool alwaysUseATSU = NO;
-
-// Character property functions.
-
-static inline bool isSpace(UChar32 c)
-{
- return c == SPACE || c == '\t' || c == '\n' || c == NO_BREAK_SPACE;
-}
-
-static const uint8_t isRoundingHackCharacterTable[0x100] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 /*\t*/, 1 /*\n*/, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 1 /*space*/, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 /*-*/, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 /*?*/,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 1 /*no-break space*/, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-static inline bool isRoundingHackCharacter(UChar32 c)
-{
- return (((c & ~0xFF) == 0 && isRoundingHackCharacterTable[c]));
-}
-
-// Map utility functions
-
-static inline WebGlyphWidth widthForGlyph(WebTextRenderer *renderer, ATSGlyphRef glyph)
-{
- WidthMap *map;
- for (map = renderer->glyphToWidthMap; 1; map = map->next) {
- if (!map)
- map = extendWidthMap(renderer, glyph);
- if (glyph >= map->startRange && glyph <= map->endRange)
- break;
- }
- WebGlyphWidth width = map->widths[glyph - map->startRange];
- if (width >= 0)
- return width;
- NSFont *font = renderer->font.font;
- float pointSize = [font pointSize];
- CGAffineTransform m = CGAffineTransformMakeScale(pointSize, pointSize);
- CGSize advance;
- if (!WKGetGlyphTransformedAdvances(font, &m, &glyph, &advance)) {
- LOG_ERROR("Unable to cache glyph widths for %@ %f", [font displayName], pointSize);
- advance.width = 0;
- }
- width = advance.width + renderer->syntheticBoldOffset;
- map->widths[glyph - map->startRange] = width;
- return width;
-}
-
-static OSStatus overrideLayoutOperation(ATSULayoutOperationSelector iCurrentOperation, ATSULineRef iLineRef, UInt32 iRefCon, void *iOperationCallbackParameterPtr, ATSULayoutOperationCallbackStatus *oCallbackStatus)
-{
- ATSULayoutParameters *params = (ATSULayoutParameters *)iRefCon;
- OSStatus status;
- ItemCount count;
- ATSLayoutRecord *layoutRecords;
- const WebCoreTextStyle *style = params->style;
-
- if (style->applyWordRounding) {
- status = ATSUDirectGetLayoutDataArrayPtrFromLineRef(iLineRef, kATSUDirectDataLayoutRecordATSLayoutRecordCurrent, true, (void **)&layoutRecords, &count);
- if (status != noErr) {
- *oCallbackStatus = kATSULayoutOperationCallbackStatusContinue;
- return status;
- }
-
- Fixed lastNativePos = 0;
- float lastAdjustedPos = 0;
- const WebCoreTextRun *run = params->run;
- const UniChar *characters = run->characters + run->from;
- WebTextRenderer **renderers = params->renderers + run->from;
- WebTextRenderer *renderer;
- WebTextRenderer *lastRenderer = 0;
- UniChar ch, nextCh;
- ByteCount offset = layoutRecords[0].originalOffset;
- nextCh = *(UniChar *)(((char *)characters)+offset);
- bool shouldRound = false;
- bool syntheticBoldPass = params->syntheticBoldPass;
- Fixed syntheticBoldOffset = 0;
- ATSGlyphRef spaceGlyph = 0;
- bool hasExtraSpacing = style->letterSpacing | style->wordSpacing | style->padding;
- float padding = style->padding;
- // In the CoreGraphics code path, the rounding hack is applied in logical order.
- // Here it is applied in visual left-to-right order, which may be better.
- ItemCount lastRoundingChar = 0;
- ItemCount i;
- for (i = 1; i < count; i++) {
- bool isLastChar = i == count - 1;
- renderer = renderers[offset / 2];
- if (renderer != lastRenderer) {
- lastRenderer = renderer;
- // The CoreGraphics interpretation of NSFontAntialiasedIntegerAdvancementsRenderingMode seems
- // to be "round each glyph's width to the nearest integer". This is not the same as ATSUI
- // does in any of its device-metrics modes.
- shouldRound = [renderer->font.font renderingMode] == NSFontAntialiasedIntegerAdvancementsRenderingMode;
- if (syntheticBoldPass) {
- syntheticBoldOffset = FloatToFixed(renderer->syntheticBoldOffset);
- spaceGlyph = renderer->spaceGlyph;
- }
- }
- float width = FixedToFloat(layoutRecords[i].realPos - lastNativePos);
- lastNativePos = layoutRecords[i].realPos;
- if (shouldRound)
- width = roundf(width);
- width += renderer->syntheticBoldOffset;
- if (renderer->treatAsFixedPitch ? width == renderer->spaceWidth : (layoutRecords[i-1].flags & kATSGlyphInfoIsWhiteSpace))
- width = renderer->adjustedSpaceWidth;
-
- if (hasExtraSpacing) {
- if (width && style->letterSpacing)
- width +=style->letterSpacing;
- if (isSpace(nextCh)) {
- if (style->padding) {
- if (padding < params->padPerSpace) {
- width += padding;
- padding = 0;
- } else {
- width += params->padPerSpace;
- padding -= params->padPerSpace;
- }
- }
- if (offset != 0 && !isSpace(*((UniChar *)(((char *)characters)+offset) - 1)) && style->wordSpacing)
- width += style->wordSpacing;
- }
- }
-
- ch = nextCh;
- offset = layoutRecords[i].originalOffset;
- // Use space for nextCh at the end of the loop so that we get inside the rounding hack code.
- // We won't actually round unless the other conditions are satisfied.
- nextCh = isLastChar ? ' ' : *(UniChar *)(((char *)characters)+offset);
-
- if (isRoundingHackCharacter(ch))
- width = ceilf(width);
- lastAdjustedPos = lastAdjustedPos + width;
- if (isRoundingHackCharacter(nextCh)
- && (!isLastChar
- || style->applyRunRounding
- || (run->to < (int)run->length && isRoundingHackCharacter(characters[run->to - run->from])))) {
- if (!style->rtl)
- lastAdjustedPos = ceilf(lastAdjustedPos);
- else {
- float roundingWidth = ceilf(lastAdjustedPos) - lastAdjustedPos;
- Fixed rw = FloatToFixed(roundingWidth);
- ItemCount j;
- for (j = lastRoundingChar; j < i; j++)
- layoutRecords[j].realPos += rw;
- lastRoundingChar = i;
- lastAdjustedPos += roundingWidth;
- }
- }
- if (syntheticBoldPass) {
- if (syntheticBoldOffset)
- layoutRecords[i-1].realPos += syntheticBoldOffset;
- else
- layoutRecords[i-1].glyphID = spaceGlyph;
- }
- layoutRecords[i].realPos = FloatToFixed(lastAdjustedPos);
- }
-
- status = ATSUDirectReleaseLayoutDataArrayPtr(iLineRef, kATSUDirectDataLayoutRecordATSLayoutRecordCurrent, (void **)&layoutRecords);
- }
- *oCallbackStatus = kATSULayoutOperationCallbackStatusHandled;
- return noErr;
-}
-
-@implementation WebTextRenderer
-
-static NSString *webFallbackFontFamily(void)
-{
- static NSString *webFallbackFontFamily = nil;
- if (!webFallbackFontFamily)
- webFallbackFontFamily = [[[NSFont systemFontOfSize:16.0] familyName] retain];
- return webFallbackFontFamily;
-}
-
-- initWithFont:(WebCoreFont)f
-{
- [super init];
-
- font = f;
-
- syntheticBoldOffset = f.syntheticBold ? ceilf([f.font pointSize] / 24.0f) : 0.f;
-
- bool failedSetup = false;
- if (!setUpFont(self)) {
- // Ack! Something very bad happened, like a corrupt font.
- // Try looking for an alternate 'base' font for this renderer.
-
- // Special case hack to use "Times New Roman" in place of "Times".
- // "Times RO" is a common font whose family name is "Times".
- // It overrides the normal "Times" family font.
- // It also appears to have a corrupt regular variant.
- NSString *fallbackFontFamily;
- if ([[font.font familyName] isEqual:@"Times"])
- fallbackFontFamily = @"Times New Roman";
- else
- fallbackFontFamily = webFallbackFontFamily();
-
- // Try setting up the alternate font.
- // This is a last ditch effort to use a substitute font when something has gone wrong.
-#if !ERROR_DISABLED
- NSFont *initialFont = font.font;
-#endif
- font.font = [[NSFontManager sharedFontManager] convertFont:font.font toFamily:fallbackFontFamily];
-#if !ERROR_DISABLED
- NSString *filePath = pathFromFont(initialFont);
- if (!filePath)
- filePath = @"not known";
-#endif
- if (!setUpFont(self)) {
- if ([fallbackFontFamily isEqual:@"Times New Roman"]) {
- // OK, couldn't setup Times New Roman as an alternate to Times, fallback
- // on the system font. If this fails we have no alternative left.
- font.font = [[NSFontManager sharedFontManager] convertFont:font.font toFamily:webFallbackFontFamily()];
- if (!setUpFont(self)) {
- // We tried, Times, Times New Roman, and the system font. No joy. We have to give up.
- LOG_ERROR("%@ unable to initialize with font %@ at %@", self, initialFont, filePath);
- failedSetup = true;
- }
- } else {
- // We tried the requested font and the system font. No joy. We have to give up.
- LOG_ERROR("%@ unable to initialize with font %@ at %@", self, initialFont, filePath);
- failedSetup = true;
- }
- }
-
- // Report the problem.
- LOG_ERROR("Corrupt font detected, using %@ in place of %@ located at \"%@\".",
- [font.font familyName], [initialFont familyName], filePath);
- }
-
- // If all else fails, try to set up using the system font.
- // This is probably because Times and Times New Roman are both unavailable.
- if (failedSetup) {
- font.font = [NSFont systemFontOfSize:[font.font pointSize]];
- LOG_ERROR("%@ failed to set up font, using system font %s", self, font.font);
- setUpFont(self);
- }
-
- int iAscent;
- int iDescent;
- int iLineGap;
- unsigned unitsPerEm;
- WKGetFontMetrics(font.font, &iAscent, &iDescent, &iLineGap, &unitsPerEm);
- float pointSize = [font.font pointSize];
- float fAscent = SCALE_EM_TO_UNITS(iAscent, unitsPerEm) * pointSize;
- float fDescent = -SCALE_EM_TO_UNITS(iDescent, unitsPerEm) * pointSize;
- float fLineGap = SCALE_EM_TO_UNITS(iLineGap, unitsPerEm) * pointSize;
-
- // We need to adjust Times, Helvetica, and Courier to closely match the
- // vertical metrics of their Microsoft counterparts that are the de facto
- // web standard. The AppKit adjustment of 20% is too big and is
- // incorrectly added to line spacing, so we use a 15% adjustment instead
- // and add it to the ascent.
- NSString *familyName = [font.font familyName];
- if ([familyName isEqualToString:@"Times"] || [familyName isEqualToString:@"Helvetica"] || [familyName isEqualToString:@"Courier"])
- fAscent += floorf(((fAscent + fDescent) * 0.15f) + 0.5f);
-
- ascent = lroundf(fAscent);
- descent = lroundf(fDescent);
- lineGap = lroundf(fLineGap);
-
- lineSpacing = ascent + descent + lineGap;
-
- [font.font retain];
-
- return self;
-}
-
-static void destroy(WebTextRenderer *renderer)
-{
- if (renderer->styleGroup)
- WKReleaseStyleGroup(renderer->styleGroup);
-
- freeWidthMap(renderer->glyphToWidthMap);
- freeGlyphMap(renderer->characterToGlyphMap);
-
- if (renderer->ATSUStyleInitialized)
- ATSUDisposeStyle(renderer->_ATSUStyle);
-}
-
-- (void)dealloc
-{
- destroy(self);
-
- [font.font release];
- [smallCapsRenderer release];
-
- [super dealloc];
-}
-
-- (void)finalize
-{
- destroy(self);
-
- [super finalize];
-}
-
-- (int)ascent
-{
- return ascent;
-}
-
-- (int)descent
-{
- return descent;
-}
-
-- (int)lineSpacing
-{
- return lineSpacing;
-}
-
-- (float)xHeight
-{
- // Measure the actual character "x", because AppKit synthesizes X height rather than getting it from the font.
- // Unfortunately, NSFont will round this for us so we don't quite get the right value.
- WebTextRenderer *renderer = [[WebTextRendererFactory sharedFactory] rendererWithFont:font];
- NSGlyph xGlyph = glyphForCharacter(&renderer, 'x');
- if (xGlyph) {
- NSRect xBox = [font.font boundingRectForGlyph:xGlyph];
- // Use the maximum of either width or height because "x" is nearly square
- // and web pages that foolishly use this metric for width will be laid out
- // poorly if we return an accurate height. Classic case is Times 13 point,
- // which has an "x" that is 7x6 pixels.
- return MAX(NSMaxX(xBox), NSMaxY(xBox));
- }
-
- return [font.font xHeight];
-}
-
-- (void)drawRun:(const WebCoreTextRun *)run style:(const WebCoreTextStyle *)style geometry:(const WebCoreTextGeometry *)geometry
-{
- if (shouldUseATSU(run))
- ATSU_draw(self, run, style, geometry);
- else
- CG_draw(self, run, style, geometry);
-}
-
-- (float)floatWidthForRun:(const WebCoreTextRun *)run style:(const WebCoreTextStyle *)style
-{
- if (shouldUseATSU(run))
- return ATSU_floatWidthForRun(self, run, style);
- return CG_floatWidthForRun(self, run, style, 0, 0, 0, 0, 0);
-}
-
-static void drawHorizontalLine(float x, float y, float width, NSColor *color, float thickness, bool shouldAntialias)
-{
- NSGraphicsContext *graphicsContext = [NSGraphicsContext currentContext];
- CGContextRef cgContext = (CGContextRef)[graphicsContext graphicsPort];
-
- CGContextSaveGState(cgContext);
-
- [color set];
- CGContextSetLineWidth(cgContext, thickness);
- CGContextSetShouldAntialias(cgContext, shouldAntialias);
-
- float halfThickness = thickness / 2;
-
- CGPoint linePoints[2];
- linePoints[0].x = x + halfThickness;
- linePoints[0].y = y + halfThickness;
- linePoints[1].x = x + width - halfThickness;
- linePoints[1].y = y + halfThickness;
- CGContextStrokeLineSegments(cgContext, linePoints, 2);
-
- CGContextRestoreGState(cgContext);
-}
-
-- (void)drawLineForCharacters:(NSPoint)point yOffset:(float)yOffset width:(int)width color:(NSColor *)color thickness:(float)thickness
-{
- // Note: This function assumes that point.x and point.y are integers (and that's currently always the case).
-
- NSGraphicsContext *graphicsContext = [NSGraphicsContext currentContext];
- CGContextRef cgContext = (CGContextRef)[graphicsContext graphicsPort];
-
- bool printing = ![graphicsContext isDrawingToScreen];
-
- float x = point.x;
- float y = point.y + yOffset;
-
- // Leave 1.0 in user space between the baseline of the text and the top of the underline.
- // FIXME: Is this the right distance for space above the underline? Even for thick underlines on large sized text?
- y += 1;
-
- if (printing) {
- // When printing, use a minimum thickness of 0.5 in user space.
- // See bugzilla bug 4255 for details of why 0.5 is the right minimum thickness to use while printing.
- if (thickness < 0.5)
- thickness = 0.5;
-
- // When printing, use antialiasing instead of putting things on integral pixel boundaries.
- } else {
- // On screen, use a minimum thickness of 1.0 in user space (later rounded to an integral number in device space).
- if (thickness < 1)
- thickness = 1;
-
- // On screen, round all parameters to integer boundaries in device space.
- CGRect lineRect = CGContextConvertRectToDeviceSpace(cgContext, CGRectMake(x, y, width, thickness));
- lineRect.origin.x = roundf(lineRect.origin.x);
- lineRect.origin.y = roundf(lineRect.origin.y);
- lineRect.size.width = roundf(lineRect.size.width);
- lineRect.size.height = roundf(lineRect.size.height);
- if (lineRect.size.height == 0) // don't let thickness round down to 0 pixels
- lineRect.size.height = 1;
- lineRect = CGContextConvertRectToUserSpace(cgContext, lineRect);
- x = lineRect.origin.x;
- y = lineRect.origin.y;
- width = lineRect.size.width;
- thickness = lineRect.size.height;
- }
-
- // FIXME: How about using a rectangle fill instead of drawing a line?
- drawHorizontalLine(x, y, width, color, thickness, printing);
-}
-
-- (NSRect)selectionRectForRun:(const WebCoreTextRun *)run style:(const WebCoreTextStyle *)style geometry:(const WebCoreTextGeometry *)geometry
-{
- if (shouldUseATSU(run))
- return ATSU_selectionRect(self, run, style, geometry);
- else
- return CG_selectionRect(self, run, style, geometry);
-}
-
-- (void)drawHighlightForRun:(const WebCoreTextRun *)run style:(const WebCoreTextStyle *)style geometry:(const WebCoreTextGeometry *)geometry
-{
- if (shouldUseATSU(run))
- ATSU_drawHighlight(self, run, style, geometry);
- else
- CG_drawHighlight(self, run, style, geometry);
-}
-
-- (int)misspellingLineThickness
-{
- return 3;
-}
-
-- (int)misspellingLinePatternWidth
-{
- return 4;
-}
-
-// the number of transparent pixels after the dot
-- (int)misspellingLinePatternGapWidth
-{
- return 1;
-}
-
-- (void)drawLineForMisspelling:(NSPoint)point withWidth:(int)width
-{
- // Constants for pattern color
- static NSColor *spellingPatternColor = nil;
- static bool usingDot = false;
- int patternHeight = [self misspellingLineThickness];
- int patternWidth = [self misspellingLinePatternWidth];
-
- // Initialize pattern color if needed
- if (!spellingPatternColor) {
- NSImage *image = [NSImage imageNamed:@"SpellingDot"];
- ASSERT(image); // if image is not available, we want to know
- NSColor *color = (image ? [NSColor colorWithPatternImage:image] : nil);
- if (color)
- usingDot = true;
- else
- color = [NSColor redColor];
- spellingPatternColor = [color retain];
- }
-
- // Make sure to draw only complete dots.
- // NOTE: Code here used to shift the underline to the left and increase the width
- // to make sure everything gets underlined, but that results in drawing out of
- // bounds (e.g. when at the edge of a view) and could make it appear that the
- // space between adjacent misspelled words was underlined.
- if (usingDot) {
- // allow slightly more considering that the pattern ends with a transparent pixel
- int widthMod = width % patternWidth;
- if (patternWidth - widthMod > [self misspellingLinePatternGapWidth])
- width -= widthMod;
- }
-
- // Draw underline
- NSGraphicsContext *currentContext = [NSGraphicsContext currentContext];
- CGContextRef context = (CGContextRef)[currentContext graphicsPort];
- CGContextSaveGState(context);
-
- [spellingPatternColor set];
-
- CGPoint transformedOrigin = CGPointApplyAffineTransform(CGPointMake(point.x, point.y), CGContextGetCTM(context));
- CGContextSetPatternPhase(context, CGSizeMake(transformedOrigin.x, transformedOrigin.y));
-
- NSRectFillUsingOperation(NSMakeRect(point.x, point.y, width, patternHeight), NSCompositeSourceOver);
-
- CGContextRestoreGState(context);
-}
-
-- (int)pointToOffset:(const WebCoreTextRun *)run style:(const WebCoreTextStyle *)style position:(int)x includePartialGlyphs:(BOOL)includePartialGlyphs
-{
- if (shouldUseATSU(run))
- return ATSU_pointToOffset(self, run, style, x, includePartialGlyphs);
- return CG_pointToOffset(self, run, style, x, includePartialGlyphs);
-}
-
-+ (void)setAlwaysUseATSU:(bool)f
-{
- alwaysUseATSU = f;
-}
-
-@end
-
-static WebTextRenderer *getSmallCapsRenderer(WebTextRenderer *renderer)
-{
- if (!renderer->smallCapsRenderer) {
- NS_DURING
- float size = [renderer->font.font pointSize] * SMALLCAPS_FONTSIZE_MULTIPLIER;
- WebCoreFont smallCapsFont;
- WebCoreInitializeFont(&smallCapsFont);
- smallCapsFont.font = [[NSFontManager sharedFontManager] convertFont:renderer->font.font toSize:size];
- renderer->smallCapsRenderer = [rendererForAlternateFont(renderer, smallCapsFont) retain];
- NS_HANDLER
- NSLog(@"uncaught exception selecting font for small caps: %@", localException);
- NS_ENDHANDLER
- }
- return renderer->smallCapsRenderer;
-}
-
-static inline bool fontContainsString(NSFont *font, NSString *string)
-{
- NSCharacterSet *set = [[font coveredCharacterSet] invertedSet];
- return set && [string rangeOfCharacterFromSet:set].location == NSNotFound;
-}
-
-static NSFont *findSubstituteFont(WebTextRenderer *renderer, NSString *string, NSString **families)
-{
- NSFont *substituteFont = nil;
-
- // First search the CSS family fallback list.
- // Start at 1 (2nd font) because we've already failed on the first lookup.
- NSString *family = nil;
- int i = 1;
- while (families && families[i]) {
- family = families[i++];
- NSFont *f = [[WebTextRendererFactory sharedFactory] cachedFontFromFamily:family
- traits:[[NSFontManager sharedFontManager] traitsOfFont:renderer->font.font]
- size:[renderer->font.font pointSize]];
- if (f && fontContainsString(f, string)) {
- substituteFont = f;
- break;
- }
- }
-
- // Now do string based lookup.
- if (substituteFont == nil)
- substituteFont = WKGetFontInLanguageForRange(renderer->font.font, string, NSMakeRange(0, [string length]));
-
- // Now do character based lookup.
- if (substituteFont == nil && [string length] == 1)
- substituteFont = WKGetFontInLanguageForCharacter(renderer->font.font, [string characterAtIndex:0]);
-
- // Check to make sure this is a distinct font.
- if (substituteFont && [[substituteFont screenFont] isEqual:[renderer->font.font screenFont]])
- substituteFont = nil;
-
- // Now that we have a substitute font, attempt to match it to the best variation.
- // If we have a good match return that, otherwise return the font the AppKit has found.
- if (substituteFont) {
- NSFontManager *manager = [NSFontManager sharedFontManager];
- NSFont *bestVariation = [manager fontWithFamily:[substituteFont familyName]
- traits:[manager traitsOfFont:renderer->font.font]
- weight:[manager weightOfFont:renderer->font.font]
- size:[renderer->font.font pointSize]];
- if (bestVariation)
- substituteFont = bestVariation;
- }
-
- return substituteFont;
-}
-
-static WebTextRenderer *rendererForAlternateFont(WebTextRenderer *renderer, WebCoreFont alternateFont)
-{
- if (!alternateFont.font)
- return nil;
-
- NSFontManager *fontManager = [NSFontManager sharedFontManager];
- NSFontTraitMask fontTraits = [fontManager traitsOfFont:renderer->font.font];
- if (renderer->font.syntheticBold)
- fontTraits |= NSBoldFontMask;
- if (renderer->font.syntheticOblique)
- fontTraits |= NSItalicFontMask;
- NSFontTraitMask alternateFontTraits = [fontManager traitsOfFont:alternateFont.font];
-
- alternateFont.syntheticBold = (fontTraits & NSBoldFontMask) && !(alternateFontTraits & NSBoldFontMask);
- alternateFont.syntheticOblique = (fontTraits & NSItalicFontMask) && !(alternateFontTraits & NSItalicFontMask);
- alternateFont.forPrinter = renderer->font.forPrinter;
-
- return [[WebTextRendererFactory sharedFactory] rendererWithFont:alternateFont];
-}
-
-static WebTextRenderer *findSubstituteRenderer(WebTextRenderer *renderer, const unichar *characters, int numCharacters, NSString **families)
-{
- WebCoreFont substituteFont;
- WebCoreInitializeFont(&substituteFont);
- NSString *string = [[NSString alloc] initWithCharactersNoCopy:(unichar *)characters length: numCharacters freeWhenDone: NO];
- substituteFont.font = findSubstituteFont(renderer, string, families);
- [string release];
- return rendererForAlternateFont(renderer, substituteFont);
-}
-
-// Nasty hack to determine if we should round or ceil space widths.
-// If the font is monospace or fake monospace we ceil to ensure that
-// every character and the space are the same width. Otherwise we round.
-static bool computeWidthForSpace(WebTextRenderer *renderer)
-{
- renderer->spaceGlyph = extendGlyphMap(renderer, SPACE);
- if (renderer->spaceGlyph == 0)
- return NO;
-
- float width = widthForGlyph(renderer, renderer->spaceGlyph);
-
- renderer->spaceWidth = width;
-
- renderer->treatAsFixedPitch = [[WebTextRendererFactory sharedFactory] isFontFixedPitch:renderer->font];
- renderer->adjustedSpaceWidth = renderer->treatAsFixedPitch ? ceilf(width) : roundf(width);
-
- return YES;
-}
-
-static bool setUpFont(WebTextRenderer *renderer)
-{
- renderer->font.font = renderer->font.forPrinter ? [renderer->font.font printerFont] : [renderer->font.font screenFont];
-
- ATSUStyle fontStyle;
- if (ATSUCreateStyle(&fontStyle) != noErr)
- return NO;
-
- if (!fillStyleWithAttributes(fontStyle, renderer->font.font)) {
- ATSUDisposeStyle(fontStyle);
- return NO;
- }
-
- if (WKGetATSStyleGroup(fontStyle, &renderer->styleGroup) != noErr) {
- ATSUDisposeStyle(fontStyle);
- return NO;
- }
-
- ATSUDisposeStyle(fontStyle);
-
- if (!computeWidthForSpace(renderer)) {
- freeGlyphMap(renderer->characterToGlyphMap);
- renderer->characterToGlyphMap = 0;
- WKReleaseStyleGroup(renderer->styleGroup);
- renderer->styleGroup = 0;
- return NO;
- }
-
- return YES;
-}
-
-#if !ERROR_DISABLED
-
-static NSString *pathFromFont(NSFont *font)
-{
- FSSpec oFile;
- OSStatus status = ATSFontGetFileSpecification(FMGetATSFontRefFromFont((FMFont)WKGetNSFontATSUFontId(font)), &oFile);
- if (status == noErr) {
- OSErr err;
- FSRef fileRef;
- err = FSpMakeFSRef(&oFile, &fileRef);
- if (err == noErr) {
- UInt8 filePathBuffer[PATH_MAX];
- status = FSRefMakePath(&fileRef, filePathBuffer, PATH_MAX);
- if (status == noErr)
- return [NSString stringWithUTF8String:(const char *)filePathBuffer];
- }
- }
- return nil;
-}
-
-#endif
-
-// Useful page for testing http://home.att.net/~jameskass
-static void drawGlyphs(NSFont *font, NSColor *color, CGGlyph *glyphs, CGSize *advances, float x, float y, int numGlyphs,
- float syntheticBoldOffset, bool syntheticOblique)
-{
- NSGraphicsContext *gContext = [NSGraphicsContext currentContext];
- CGContextRef cgContext = (CGContextRef)[gContext graphicsPort];
-
- bool originalShouldUseFontSmoothing = WKCGContextGetShouldSmoothFonts(cgContext);
- CGContextSetShouldSmoothFonts(cgContext, [WebView _shouldUseFontSmoothing]);
-
- NSFont *drawFont;
- if ([gContext isDrawingToScreen]) {
- drawFont = [font screenFont];
- if (drawFont != font)
- // We are getting this in too many places (3406411); use ERROR so it only prints on debug versions for now. (We should debug this also, eventually).
- LOG_ERROR("Attempting to set non-screen font (%@) when drawing to screen. Using screen font anyway, may result in incorrect metrics.",
- [[[font fontDescriptor] fontAttributes] objectForKey:NSFontNameAttribute]);
- } else {
- drawFont = [font printerFont];
- if (drawFont != font)
- NSLog(@"Attempting to set non-printer font (%@) when printing. Using printer font anyway, may result in incorrect metrics.",
- [[[font fontDescriptor] fontAttributes] objectForKey:NSFontNameAttribute]);
- }
-
- CGContextSetFont(cgContext, WKGetCGFontFromNSFont(drawFont));
-
- CGAffineTransform matrix;
- memcpy(&matrix, [drawFont matrix], sizeof(matrix));
- if ([gContext isFlipped]) {
- matrix.b = -matrix.b;
- matrix.d = -matrix.d;
- }
- if (syntheticOblique)
- matrix = CGAffineTransformConcat(matrix, CGAffineTransformMake(1, 0, -tanf(SYNTHETIC_OBLIQUE_ANGLE * acosf(0) / 90), 1, 0, 0));
- CGContextSetTextMatrix(cgContext, matrix);
-
- WKSetCGFontRenderingMode(cgContext, drawFont);
- CGContextSetFontSize(cgContext, 1.0f);
-
- [color set];
-
- CGContextSetTextPosition(cgContext, x, y);
- CGContextShowGlyphsWithAdvances(cgContext, glyphs, advances, numGlyphs);
- if (syntheticBoldOffset) {
- CGContextSetTextPosition(cgContext, x + syntheticBoldOffset, y);
- CGContextShowGlyphsWithAdvances(cgContext, glyphs, advances, numGlyphs);
- }
-
- CGContextSetShouldSmoothFonts(cgContext, originalShouldUseFontSmoothing);
-}
-
-static void CG_drawHighlight(WebTextRenderer *renderer, const WebCoreTextRun * run, const WebCoreTextStyle *style, const WebCoreTextGeometry *geometry)
-{
- if (run->length == 0)
- return;
-
- if (style->backgroundColor == nil)
- return;
-
- [style->backgroundColor set];
- [NSBezierPath fillRect:CG_selectionRect(renderer, run, style, geometry)];
-}
-
-static NSRect CG_selectionRect(WebTextRenderer *renderer, const WebCoreTextRun * run, const WebCoreTextStyle *style, const WebCoreTextGeometry *geometry)
-{
- float yPos = geometry->useFontMetricsForSelectionYAndHeight
- ? geometry->point.y - renderer->ascent - (renderer->lineGap / 2) : geometry->selectionY;
- float height = geometry->useFontMetricsForSelectionYAndHeight
- ? renderer->lineSpacing : geometry->selectionHeight;
-
- WebCoreTextRun completeRun = *run;
- completeRun.from = 0;
- completeRun.to = run->length;
-
- WidthIterator it;
- initializeWidthIterator(&it, renderer, &completeRun, style);
-
- advanceWidthIterator(&it, run->from, 0, 0, 0);
- float beforeWidth = it.runWidthSoFar;
- advanceWidthIterator(&it, run->to, 0, 0, 0);
- float afterWidth = it.runWidthSoFar;
- // Using roundf() rather than ceilf() for the right edge as a compromise to ensure correct caret positioning
- if (style->rtl) {
- advanceWidthIterator(&it, run->length, 0, 0, 0);
- float totalWidth = it.runWidthSoFar;
- return NSMakeRect(geometry->point.x + floorf(totalWidth - afterWidth), yPos, roundf(totalWidth - beforeWidth) - floorf(totalWidth - afterWidth), height);
- } else {
- return NSMakeRect(geometry->point.x + floorf(beforeWidth), yPos, roundf(afterWidth) - floorf(beforeWidth), height);
- }
-}
-
-static void CG_draw(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style, const WebCoreTextGeometry *geometry)
-{
- float *widthBuffer, localWidthBuffer[LOCAL_BUFFER_SIZE];
- CGGlyph *glyphBuffer, localGlyphBuffer[LOCAL_BUFFER_SIZE];
- WebTextRenderer **rendererBuffer, *localRendererBuffer[LOCAL_BUFFER_SIZE];
- CGSize *advances, localAdvanceBuffer[LOCAL_BUFFER_SIZE];
- int numGlyphs = 0, i;
- float startX;
- unsigned length = run->length;
-
- if (run->length == 0)
- return;
-
- if (length * MAX_GLYPH_EXPANSION > LOCAL_BUFFER_SIZE) {
- advances = malloc(length * MAX_GLYPH_EXPANSION * sizeof(CGSize));
- widthBuffer = malloc(length * MAX_GLYPH_EXPANSION * sizeof(float));
- glyphBuffer = malloc(length * MAX_GLYPH_EXPANSION * sizeof(ATSGlyphRef));
- rendererBuffer = malloc(length * MAX_GLYPH_EXPANSION * sizeof(WebTextRenderer *));
- } else {
- advances = localAdvanceBuffer;
- widthBuffer = localWidthBuffer;
- glyphBuffer = localGlyphBuffer;
- rendererBuffer = localRendererBuffer;
- }
-
- CG_floatWidthForRun(renderer, run, style, widthBuffer, rendererBuffer, glyphBuffer, &startX, &numGlyphs);
-
- // Eek. We couldn't generate ANY glyphs for the run.
- if (numGlyphs <= 0)
- return;
-
- // Fill the advances array.
- for (i = 0; i < numGlyphs; i++) {
- advances[i].width = widthBuffer[i];
- advances[i].height = 0;
- }
-
- // Calculate the starting point of the glyphs to be displayed by adding
- // all the advances up to the first glyph.
- startX += geometry->point.x;
-
- if (style->backgroundColor != nil)
- CG_drawHighlight(renderer, run, style, geometry);
-
- // Swap the order of the glyphs if right-to-left.
- if (style->rtl) {
- int i;
- int mid = numGlyphs / 2;
- int end;
- for (i = 0, end = numGlyphs - 1; i < mid; ++i, --end) {
- CGGlyph gswap1 = glyphBuffer[i];
- CGGlyph gswap2 = glyphBuffer[end];
- glyphBuffer[i] = gswap2;
- glyphBuffer[end] = gswap1;
-
- CGSize aswap1 = advances[i];
- CGSize aswap2 = advances[end];
- advances[i] = aswap2;
- advances[end] = aswap1;
-
- WebTextRenderer *rswap1 = rendererBuffer[i];
- WebTextRenderer *rswap2 = rendererBuffer[end];
- rendererBuffer[i] = rswap2;
- rendererBuffer[end] = rswap1;
- }
- }
-
- // Draw each contiguous run of glyphs that use the same renderer.
- WebTextRenderer *currentRenderer = rendererBuffer[0];
- float nextX = startX;
- int lastFrom = 0;
- int nextGlyph = 0;
- while (nextGlyph < numGlyphs) {
- WebTextRenderer *nextRenderer = rendererBuffer[nextGlyph];
- if (nextRenderer != currentRenderer) {
- drawGlyphs(currentRenderer->font.font, style->textColor, &glyphBuffer[lastFrom], &advances[lastFrom],
- startX, geometry->point.y, nextGlyph - lastFrom,
- currentRenderer->syntheticBoldOffset, currentRenderer->font.syntheticOblique);
- lastFrom = nextGlyph;
- currentRenderer = nextRenderer;
- startX = nextX;
- }
- nextX += advances[nextGlyph].width;
- nextGlyph++;
- }
- drawGlyphs(currentRenderer->font.font, style->textColor, &glyphBuffer[lastFrom], &advances[lastFrom],
- startX, geometry->point.y, nextGlyph - lastFrom,
- currentRenderer->syntheticBoldOffset, currentRenderer->font.syntheticOblique);
-
- if (advances != localAdvanceBuffer) {
- free(advances);
- free(widthBuffer);
- free(glyphBuffer);
- free(rendererBuffer);
- }
-}
-
-static float CG_floatWidthForRun(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style, float *widthBuffer, WebTextRenderer **rendererBuffer, CGGlyph *glyphBuffer, float *startPosition, int *numGlyphsResult)
-{
- WidthIterator it;
- WebCoreTextRun completeRun;
- const WebCoreTextRun *aRun;
- if (!style->rtl)
- aRun = run;
- else {
- completeRun = *run;
- completeRun.to = run->length;
- aRun = &completeRun;
- }
- initializeWidthIterator(&it, renderer, aRun, style);
- int numGlyphs = advanceWidthIterator(&it, run->to, widthBuffer, rendererBuffer, glyphBuffer);
- float runWidth = it.runWidthSoFar;
- if (startPosition) {
- if (!style->rtl)
- *startPosition = it.widthToStart;
- else {
- float finalRoundingWidth = it.finalRoundingWidth;
- advanceWidthIterator(&it, run->length, 0, 0, 0);
- *startPosition = it.runWidthSoFar - runWidth + finalRoundingWidth;
- }
- }
- if (numGlyphsResult)
- *numGlyphsResult = numGlyphs;
- return runWidth;
-}
-
-static void updateGlyphMapEntry(WebTextRenderer *renderer, UChar32 c, ATSGlyphRef glyph, WebTextRenderer *substituteRenderer)
-{
- GlyphMap *map;
- for (map = renderer->characterToGlyphMap; map; map = map->next) {
- UChar32 start = map->startRange;
- if (c >= start && c <= map->endRange) {
- int i = c - start;
- map->glyphs[i].glyph = glyph;
- // This renderer will leak.
- // No problem though; we want it to stick around forever.
- // Max theoretical retain counts applied here will be num_fonts_on_system * num_glyphs_in_font.
- map->glyphs[i].renderer = [substituteRenderer retain];
- break;
- }
- }
-}
-
-static ATSGlyphRef extendGlyphMap(WebTextRenderer *renderer, UChar32 c)
-{
- GlyphMap *map = malloc(sizeof(GlyphMap));
- ATSLayoutRecord *glyphRecord;
- char glyphVector[WKGlyphVectorSize];
- UChar32 end, start;
- unsigned blockSize;
-
- if (renderer->characterToGlyphMap == 0)
- blockSize = INITIAL_BLOCK_SIZE;
- else
- blockSize = INCREMENTAL_BLOCK_SIZE;
- start = (c / blockSize) * blockSize;
- end = start + (blockSize - 1);
-
- LOG(FontCache, "%@ (0x%04x) adding glyphs for 0x%04x to 0x%04x", renderer->font, c, start, end);
-
- map->startRange = start;
- map->endRange = end;
- map->next = 0;
-
- unsigned i;
- unsigned count = end - start + 1;
- unsigned short buffer[INCREMENTAL_BLOCK_SIZE * 2 + 2];
- unsigned bufferLength;
-
- if (start < 0x10000) {
- bufferLength = count;
- for (i = 0; i < count; i++)
- buffer[i] = i + start;
-
- if (start == 0) {
- // Control characters must not render at all.
- for (i = 0; i < 0x20; ++i)
- buffer[i] = ZERO_WIDTH_SPACE;
- buffer[0x7F] = ZERO_WIDTH_SPACE;
-
- // But \n, \t, and nonbreaking space must render as a space.
- buffer['\n'] = ' ';
- buffer['\t'] = ' ';
- buffer[NO_BREAK_SPACE] = ' ';
- }
- } else {
- bufferLength = count * 2;
- for (i = 0; i < count; i++) {
- int c = i + start;
- buffer[i * 2] = U16_LEAD(c);
- buffer[i * 2 + 1] = U16_TRAIL(c);
- }
- }
-
- OSStatus status = WKInitializeGlyphVector(count, &glyphVector);
- if (status != noErr) {
- // This should never happen, perhaps indicates a bad font! If it does the
- // font substitution code will find an alternate font.
- free(map);
- return 0;
- }
-
- WKConvertCharToGlyphs(renderer->styleGroup, &buffer[0], bufferLength, &glyphVector);
- unsigned numGlyphs = WKGetGlyphVectorNumGlyphs(&glyphVector);
- if (numGlyphs != count) {
- // This should never happen, perhaps indicates a bad font?
- // If it does happen, the font substitution code will find an alternate font.
- WKClearGlyphVector(&glyphVector);
- free(map);
- return 0;
- }
-
- map->glyphs = malloc(count * sizeof(GlyphEntry));
- glyphRecord = (ATSLayoutRecord *)WKGetGlyphVectorFirstRecord(glyphVector);
- for (i = 0; i < count; i++) {
- map->glyphs[i].glyph = glyphRecord->glyphID;
- map->glyphs[i].renderer = renderer;
- glyphRecord = (ATSLayoutRecord *)((char *)glyphRecord + WKGetGlyphVectorRecordSize(glyphVector));
- }
- WKClearGlyphVector(&glyphVector);
-
- if (renderer->characterToGlyphMap == 0)
- renderer->characterToGlyphMap = map;
- else {
- GlyphMap *lastMap = renderer->characterToGlyphMap;
- while (lastMap->next != 0)
- lastMap = lastMap->next;
- lastMap->next = map;
- }
-
- ATSGlyphRef glyph = map->glyphs[c - start].glyph;
-
- // Special case for characters 007F-00A0.
- if (glyph == 0 && c >= 0x7F && c <= 0xA0) {
- glyph = WKGetDefaultGlyphForChar(renderer->font.font, c);
- map->glyphs[c - start].glyph = glyph;
- }
-
- return glyph;
-}
-
-static WidthMap *extendWidthMap(WebTextRenderer *renderer, ATSGlyphRef glyph)
-{
- WidthMap *map = (WidthMap *)calloc(1, sizeof(WidthMap));
- unsigned end;
- ATSGlyphRef start;
- unsigned blockSize;
- unsigned i, count;
-
- NSFont *f = renderer->font.font;
- if (renderer->glyphToWidthMap == 0) {
- if ([f numberOfGlyphs] < INITIAL_BLOCK_SIZE)
- blockSize = [f numberOfGlyphs];
- else
- blockSize = INITIAL_BLOCK_SIZE;
- } else {
- blockSize = INCREMENTAL_BLOCK_SIZE;
- }
- if (blockSize == 0) {
- start = 0;
- } else {
- start = (glyph / blockSize) * blockSize;
- }
- end = ((unsigned)start) + blockSize;
-
- LOG(FontCache, "%@ (0x%04x) adding widths for range 0x%04x to 0x%04x", renderer->font, glyph, start, end);
-
- map->startRange = start;
- map->endRange = end;
- count = end - start + 1;
-
- map->widths = malloc(count * sizeof(WebGlyphWidth));
- for (i = 0; i < count; i++)
- map->widths[i] = NAN;
-
- if (renderer->glyphToWidthMap == 0)
- renderer->glyphToWidthMap = map;
- else {
- WidthMap *lastMap = renderer->glyphToWidthMap;
- while (lastMap->next != 0)
- lastMap = lastMap->next;
- lastMap->next = map;
- }
-
- return map;
-}
-
-static void initializeATSUStyle(WebTextRenderer *renderer)
-{
- // The two NSFont calls in this method (pointSize and _atsFontID) do not raise exceptions.
-
- if (!renderer->ATSUStyleInitialized) {
- OSStatus status;
- ByteCount propTableSize;
-
- status = ATSUCreateStyle(&renderer->_ATSUStyle);
- if (status != noErr)
- FATAL("ATSUCreateStyle failed (%d)", status);
-
- ATSUFontID fontID = WKGetNSFontATSUFontId(renderer->font.font);
- if (fontID == 0) {
- ATSUDisposeStyle(renderer->_ATSUStyle);
- LOG_ERROR("unable to get ATSUFontID for %@", renderer->font.font);
- return;
- }
-
- CGAffineTransform transform = CGAffineTransformMakeScale(1, -1);
- if (renderer->font.syntheticOblique)
- transform = CGAffineTransformConcat(transform, CGAffineTransformMake(1, 0, -tanf(SYNTHETIC_OBLIQUE_ANGLE * acosf(0) / 90), 1, 0, 0));
- Fixed fontSize = FloatToFixed([renderer->font.font pointSize]);
- // Turn off automatic kerning until it is supported in the CG code path (6136 in bugzilla)
- Fract kerningInhibitFactor = FloatToFract(1.0);
- ATSUAttributeTag styleTags[4] = { kATSUSizeTag, kATSUFontTag, kATSUFontMatrixTag, kATSUKerningInhibitFactorTag };
- ByteCount styleSizes[4] = { sizeof(Fixed), sizeof(ATSUFontID), sizeof(CGAffineTransform), sizeof(Fract) };
- ATSUAttributeValuePtr styleValues[4] = { &fontSize, &fontID, &transform, &kerningInhibitFactor };
- status = ATSUSetAttributes(renderer->_ATSUStyle, 4, styleTags, styleSizes, styleValues);
- if (status != noErr)
- FATAL("ATSUSetAttributes failed (%d)", status);
- status = ATSFontGetTable(fontID, 'prop', 0, 0, 0, &propTableSize);
- if (status == noErr) // naively assume that if a 'prop' table exists then it contains mirroring info
- renderer->ATSUMirrors = YES;
- else if (status == kATSInvalidFontTableAccess)
- renderer->ATSUMirrors = NO;
- else
- FATAL("ATSFontGetTable failed (%d)", status);
-
- // Turn off ligatures such as 'fi' to match the CG code path's behavior, until bugzilla 6135 is fixed.
- // Don't be too aggressive: if the font doesn't contain 'a', then assume that any ligatures it contains are
- // in characters that always go through ATSUI, and therefore allow them. Geeza Pro is an example.
- // See bugzilla 5166.
- if ([[renderer->font.font coveredCharacterSet] characterIsMember:'a']) {
- ATSUFontFeatureType featureTypes[] = { kLigaturesType };
- ATSUFontFeatureSelector featureSelectors[] = { kCommonLigaturesOffSelector };
- status = ATSUSetFontFeatures(renderer->_ATSUStyle, 1, featureTypes, featureSelectors);
- }
-
- renderer->ATSUStyleInitialized = YES;
- }
-}
-
-static void createATSULayoutParameters(ATSULayoutParameters *params, WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style)
-{
- params->run = run;
- params->style = style;
- // FIXME: It is probably best to always allocate a buffer for RTL, since even if for this
- // renderer ATSUMirrors is true, for a substitute renderer it might be false.
- WebTextRenderer **renderers = malloc(run->length * sizeof(WebTextRenderer *));
- params->renderers = renderers;
- UniChar *charBuffer = (style->smallCaps || (style->rtl && !renderer->ATSUMirrors)) ? malloc(run->length * sizeof(UniChar)) : 0;
- params->charBuffer = charBuffer;
- params->syntheticBoldPass = false;
-
- // The only Cocoa calls here are to NSGraphicsContext, which does not raise exceptions.
-
- ATSUTextLayout layout;
- OSStatus status;
- ATSULayoutOperationOverrideSpecifier overrideSpecifier;
-
- initializeATSUStyle(renderer);
-
- // FIXME: This is currently missing the following required features that the CoreGraphics code path has:
- // - \n, \t, and nonbreaking space render as a space.
- // - Other control characters do not render (other code path uses zero-width spaces).
-
- UniCharCount totalLength = run->length;
- UniCharArrayOffset runTo = (run->to == -1 ? totalLength : (unsigned int)run->to);
- UniCharArrayOffset runFrom = run->from;
-
- if (charBuffer)
- memcpy(charBuffer, run->characters, totalLength * sizeof(UniChar));
-
- UniCharCount runLength = runTo - runFrom;
-
- status = ATSUCreateTextLayoutWithTextPtr(
- (charBuffer ? charBuffer : run->characters),
- runFrom, // offset
- runLength, // length
- totalLength, // total length
- 1, // styleRunCount
- &runLength, // length of style run
- &renderer->_ATSUStyle,
- &layout);
- if (status != noErr)
- FATAL("ATSUCreateTextLayoutWithTextPtr failed(%d)", status);
- params->layout = layout;
- ATSUSetTextLayoutRefCon(layout, (UInt32)params);
-
- CGContextRef cgContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
- ATSLineLayoutOptions lineLayoutOptions = kATSLineKeepSpacesOutOfMargin | kATSLineHasNoHangers;
- Boolean rtl = style->rtl;
- overrideSpecifier.operationSelector = kATSULayoutOperationPostLayoutAdjustment;
- overrideSpecifier.overrideUPP = overrideLayoutOperation;
- ATSUAttributeTag tags[] = { kATSUCGContextTag, kATSULineLayoutOptionsTag, kATSULineDirectionTag, kATSULayoutOperationOverrideTag };
- ByteCount sizes[] = { sizeof(CGContextRef), sizeof(ATSLineLayoutOptions), sizeof(Boolean), sizeof(ATSULayoutOperationOverrideSpecifier) };
- ATSUAttributeValuePtr values[] = { &cgContext, &lineLayoutOptions, &rtl, &overrideSpecifier };
-
- status = ATSUSetLayoutControls(layout, (style->applyWordRounding ? 4 : 3), tags, sizes, values);
- if (status != noErr)
- FATAL("ATSUSetLayoutControls failed(%d)", status);
-
- status = ATSUSetTransientFontMatching(layout, YES);
- if (status != noErr)
- FATAL("ATSUSetTransientFontMatching failed(%d)", status);
-
- params->hasSyntheticBold = false;
- ATSUFontID ATSUSubstituteFont;
- UniCharArrayOffset substituteOffset = runFrom;
- UniCharCount substituteLength;
- UniCharArrayOffset lastOffset;
- WebTextRenderer *substituteRenderer = 0;
-
- while (substituteOffset < runTo) {
- lastOffset = substituteOffset;
- status = ATSUMatchFontsToText(layout, substituteOffset, kATSUToTextEnd, &ATSUSubstituteFont, &substituteOffset, &substituteLength);
- if (status == kATSUFontsMatched || status == kATSUFontsNotMatched) {
- substituteRenderer = findSubstituteRenderer(renderer, run->characters+substituteOffset, substituteLength, style->families);
- if (substituteRenderer) {
- initializeATSUStyle(substituteRenderer);
- if (substituteRenderer->_ATSUStyle)
- ATSUSetRunStyle(layout, substituteRenderer->_ATSUStyle, substituteOffset, substituteLength);
- } else
- substituteRenderer = renderer;
- } else {
- substituteOffset = runTo;
- substituteLength = 0;
- }
-
- bool isSmallCap = false;
- UniCharArrayOffset firstSmallCap = 0;
- WebTextRenderer *r = renderer;
- UniCharArrayOffset i;
- for (i = lastOffset; ; i++) {
- if (i == substituteOffset || i == substituteOffset + substituteLength) {
- if (isSmallCap) {
- isSmallCap = false;
- initializeATSUStyle(getSmallCapsRenderer(r));
- ATSUSetRunStyle(layout, getSmallCapsRenderer(r)->_ATSUStyle, firstSmallCap, i - firstSmallCap);
- }
- if (i == substituteOffset && substituteLength > 0)
- r = substituteRenderer;
- else
- break;
- }
- if (rtl && charBuffer && !r->ATSUMirrors)
- charBuffer[i] = u_charMirror(charBuffer[i]);
- if (style->smallCaps) {
- UniChar c = charBuffer[i];
- UniChar newC;
- if (U_GET_GC_MASK(c) & U_GC_M_MASK)
- renderers[i] = isSmallCap ? getSmallCapsRenderer(r) : r;
- else if (!u_isUUppercase(c) && (newC = u_toupper(c)) != c) {
- charBuffer[i] = newC;
- if (!isSmallCap) {
- isSmallCap = true;
- firstSmallCap = i;
- }
- renderers[i] = getSmallCapsRenderer(r);
- } else {
- if (isSmallCap) {
- isSmallCap = false;
- initializeATSUStyle(getSmallCapsRenderer(r));
- ATSUSetRunStyle(layout, getSmallCapsRenderer(r)->_ATSUStyle, firstSmallCap, i - firstSmallCap);
- }
- renderers[i] = r;
- }
- } else
- renderers[i] = r;
- if (renderers[i]->syntheticBoldOffset)
- params->hasSyntheticBold = true;
- }
- substituteOffset += substituteLength;
- }
- if (style->padding) {
- float numSpaces = 0;
- unsigned k;
- for (k = 0; k < totalLength; k++)
- if (isSpace(run->characters[k]))
- numSpaces++;
-
- params->padPerSpace = ceilf(style->padding / numSpaces);
- } else
- params->padPerSpace = 0;
-}
-
-static void disposeATSULayoutParameters(ATSULayoutParameters *params)
-{
- ATSUDisposeTextLayout(params->layout);
- free(params->charBuffer);
- free(params->renderers);
-}
-
-static ATSTrapezoid getTextBounds(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style, NSPoint p)
-{
- OSStatus status;
-
- if (run->to - run->from <= 0) {
- ATSTrapezoid nilTrapezoid = { {0, 0}, {0, 0}, {0, 0}, {0, 0} };
- return nilTrapezoid;
- }
-
- ATSULayoutParameters params;
- createATSULayoutParameters(¶ms, renderer, run, style);
-
- ATSTrapezoid firstGlyphBounds;
- ItemCount actualNumBounds;
- status = ATSUGetGlyphBounds(params.layout, FloatToFixed(p.x), FloatToFixed(p.y), run->from, run->to - run->from, kATSUseFractionalOrigins, 1, &firstGlyphBounds, &actualNumBounds);
- if (status != noErr)
- FATAL("ATSUGetGlyphBounds() failed(%d)", status);
- if (actualNumBounds != 1)
- FATAL("unexpected result from ATSUGetGlyphBounds(): actualNumBounds(%d) != 1", actualNumBounds);
-
- disposeATSULayoutParameters(¶ms);
-
- return firstGlyphBounds;
-}
-
-static float ATSU_floatWidthForRun(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style)
-{
- ATSTrapezoid oGlyphBounds = getTextBounds(renderer, run, style, NSZeroPoint);
- return MAX(FixedToFloat(oGlyphBounds.upperRight.x), FixedToFloat(oGlyphBounds.lowerRight.x)) -
- MIN(FixedToFloat(oGlyphBounds.upperLeft.x), FixedToFloat(oGlyphBounds.lowerLeft.x));
-}
-
-// Be sure to free the run.characters allocated by this function.
-static WebCoreTextRun addDirectionalOverride(const WebCoreTextRun *run, bool rtl)
-{
- int from = run->from;
- int to = run->to;
- if (from == -1)
- from = 0;
- if (to == -1)
- to = run->length;
-
- UniChar *charactersWithOverride = malloc(sizeof(UniChar) * (run->length + 2));
-
- charactersWithOverride[0] = rtl ? RIGHT_TO_LEFT_OVERRIDE : LEFT_TO_RIGHT_OVERRIDE;
- memcpy(&charactersWithOverride[1], &run->characters[0], sizeof(UniChar) * run->length);
- charactersWithOverride[run->length + 1] = POP_DIRECTIONAL_FORMATTING;
-
- WebCoreTextRun runWithOverride;
-
- runWithOverride.from = from + 1;
- runWithOverride.to = to + 1;
- runWithOverride.length = run->length + 2;
- runWithOverride.characters = charactersWithOverride;
-
- return runWithOverride;
-}
-
-static void ATSU_drawHighlight(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style, const WebCoreTextGeometry *geometry)
-{
- // The only Cocoa calls made here are to NSColor and NSBezierPath, and they do not raise exceptions.
-
- if (style->backgroundColor == nil)
- return;
- if (run->to <= run->from)
- return;
-
- [style->backgroundColor set];
- [NSBezierPath fillRect:ATSU_selectionRect(renderer, run, style, geometry)];
-}
-
-static NSRect ATSU_selectionRect(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style, const WebCoreTextGeometry *geometry)
-{
- int from = run->from;
- int to = run->to;
- if (from == -1)
- from = 0;
- if (to == -1)
- to = run->length;
-
- WebCoreTextRun completeRun = *run;
- completeRun.from = 0;
- completeRun.to = run->length;
-
- WebCoreTextRun *aRun = &completeRun;
- WebCoreTextRun swappedRun;
-
- if (style->directionalOverride) {
- swappedRun = addDirectionalOverride(aRun, style->rtl);
- aRun = &swappedRun;
- from++;
- to++;
- }
-
- ATSULayoutParameters params;
- createATSULayoutParameters(¶ms, renderer, aRun, style);
-
- ATSTrapezoid firstGlyphBounds;
- ItemCount actualNumBounds;
-
- OSStatus status = ATSUGetGlyphBounds(params.layout, 0, 0, from, to - from, kATSUseFractionalOrigins, 1, &firstGlyphBounds, &actualNumBounds);
- if (status != noErr || actualNumBounds != 1) {
- static ATSTrapezoid zeroTrapezoid = { {0, 0}, {0, 0}, {0, 0}, {0, 0} };
- firstGlyphBounds = zeroTrapezoid;
- }
- disposeATSULayoutParameters(¶ms);
-
- float beforeWidth = MIN(FixedToFloat(firstGlyphBounds.lowerLeft.x), FixedToFloat(firstGlyphBounds.upperLeft.x));
- float afterWidth = MAX(FixedToFloat(firstGlyphBounds.lowerRight.x), FixedToFloat(firstGlyphBounds.upperRight.x));
- float yPos = geometry->useFontMetricsForSelectionYAndHeight
- ? geometry->point.y - renderer->ascent : geometry->selectionY;
- float height = geometry->useFontMetricsForSelectionYAndHeight
- ? renderer->lineSpacing : geometry->selectionHeight;
-
- NSRect rect = NSMakeRect(geometry->point.x + floorf(beforeWidth), yPos, roundf(afterWidth) - floorf(beforeWidth), height);
-
- if (style->directionalOverride)
- free((void *)swappedRun.characters);
-
- return rect;
-}
-
-
-static void ATSU_draw(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style, const WebCoreTextGeometry *geometry)
-{
- // The only Cocoa calls made here are to NSColor and NSGraphicsContext, and they do not raise exceptions.
-
- OSStatus status;
- int from, to;
- const WebCoreTextRun *aRun = run;
- WebCoreTextRun swappedRun;
-
- if (style->directionalOverride) {
- swappedRun = addDirectionalOverride(run, style->rtl);
- aRun = &swappedRun;
- }
-
- from = aRun->from;
- to = aRun->to;
- if (from == -1)
- from = 0;
- if (to == -1)
- to = run->length;
-
- int runLength = to - from;
- if (runLength <= 0)
- return;
-
- WebCoreTextRun completeRun = *aRun;
- completeRun.from = 0;
- completeRun.to = aRun->length;
- ATSULayoutParameters params;
- createATSULayoutParameters(¶ms, renderer, &completeRun, style);
-
- if (style->backgroundColor != nil)
- ATSU_drawHighlight(renderer, run, style, geometry);
-
- [style->textColor set];
-
- // ATSUI can't draw beyond -32768 to +32767 so we translate the CTM and tell ATSUI to draw at (0, 0).
- NSGraphicsContext *gContext = [NSGraphicsContext currentContext];
- CGContextRef context = (CGContextRef)[gContext graphicsPort];
- CGContextTranslateCTM(context, geometry->point.x, geometry->point.y);
- bool flipped = [gContext isFlipped];
- if (!flipped)
- CGContextScaleCTM(context, 1.0, -1.0);
- status = ATSUDrawText(params.layout, aRun->from, runLength, 0, 0);
- if (status == noErr && params.hasSyntheticBold) {
- // Force relayout for the bold pass
- ATSUClearLayoutCache(params.layout, 0);
- params.syntheticBoldPass = true;
- status = ATSUDrawText(params.layout, aRun->from, runLength, 0, 0);
- }
- if (!flipped)
- CGContextScaleCTM(context, 1.0, -1.0);
- CGContextTranslateCTM(context, -geometry->point.x, -geometry->point.y);
-
- if (status != noErr) {
- // Nothing to do but report the error (dev build only).
- LOG_ERROR("ATSUDrawText() failed(%d)", status);
- }
-
- disposeATSULayoutParameters(¶ms);
-
- if (style->directionalOverride)
- free((void *)swappedRun.characters);
-}
-
-static int ATSU_pointToOffset(WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style,
- int x, bool includePartialGlyphs)
-{
- const WebCoreTextRun *aRun = run;
- WebCoreTextRun swappedRun;
-
- // Enclose in LRO/RLO - PDF to force ATSU to render visually.
- if (style->directionalOverride) {
- swappedRun = addDirectionalOverride(aRun, style->rtl);
- aRun = &swappedRun;
- }
-
- ATSULayoutParameters params;
- createATSULayoutParameters(¶ms, renderer, aRun, style);
-
- UniCharArrayOffset primaryOffset = aRun->from;
-
- // FIXME: No idea how to avoid including partial glyphs.
- // Not even sure if that's the behavior this yields now.
- Boolean isLeading;
- UniCharArrayOffset secondaryOffset = 0;
- OSStatus status = ATSUPositionToOffset(params.layout, FloatToFixed(x), FloatToFixed(-1), &primaryOffset, &isLeading, &secondaryOffset);
- unsigned offset;
- if (status == noErr) {
- offset = (unsigned)primaryOffset;
- } else {
- // Failed to find offset! Return 0 offset.
- offset = 0;
- }
-
- disposeATSULayoutParameters(¶ms);
-
- if (style->directionalOverride)
- free((void *)swappedRun.characters);
-
- return offset - aRun->from;
-}
-
-static bool advanceWidthIteratorOneCharacter(WidthIterator *iterator, float *totalWidth)
-{
- float widths[MAX_GLYPH_EXPANSION];
- WebTextRenderer *renderers[MAX_GLYPH_EXPANSION];
- ATSGlyphRef glyphs[MAX_GLYPH_EXPANSION];
- unsigned numGlyphs = advanceWidthIterator(iterator, iterator->currentCharacter + 1, widths, renderers, glyphs);
- unsigned i;
- float w = 0;
- for (i = 0; i < numGlyphs; ++i)
- w += widths[i];
- *totalWidth = w;
- return numGlyphs != 0;
-}
-
-static int CG_pointToOffset(WebTextRenderer *renderer, const WebCoreTextRun * run, const WebCoreTextStyle *style,
- int x, bool includePartialGlyphs)
-{
- float delta = (float)x;
-
- WidthIterator it;
- initializeWidthIterator(&it, renderer, run, style);
-
- unsigned offset;
-
- if (style->rtl) {
- delta -= CG_floatWidthForRun(renderer, run, style, 0, 0, 0, 0, 0);
- while (1) {
- offset = it.currentCharacter;
- float w;
- if (!advanceWidthIteratorOneCharacter(&it, &w))
- break;
- delta += w;
- if (includePartialGlyphs) {
- if (delta - w / 2 >= 0)
- break;
- } else {
- if (delta >= 0)
- break;
- }
- }
- } else {
- while (1) {
- offset = it.currentCharacter;
- float w;
- if (!advanceWidthIteratorOneCharacter(&it, &w))
- break;
- delta -= w;
- if (includePartialGlyphs) {
- if (delta + w / 2 <= 0)
- break;
- } else {
- if (delta <= 0)
- break;
- }
- }
- }
-
- return offset - run->from;
-}
-
-static void freeWidthMap(WidthMap *map)
-{
- while (map) {
- WidthMap *next = map->next;
- free(map->widths);
- free(map);
- map = next;
- }
-}
-
-static void freeGlyphMap(GlyphMap *map)
-{
- while (map) {
- GlyphMap *next = map->next;
- free(map->glyphs);
- free(map);
- map = next;
- }
-}
-
-static inline ATSGlyphRef glyphForCharacter(WebTextRenderer **renderer, UChar32 c)
-{
- // this loop is hot, so it is written to avoid LSU stalls
- GlyphMap *map;
- GlyphMap *nextMap;
- for (map = (*renderer)->characterToGlyphMap; map; map = nextMap) {
- UChar32 start = map->startRange;
- nextMap = map->next;
- if (c >= start && c <= map->endRange) {
- GlyphEntry *ge = &map->glyphs[c - start];
- *renderer = ge->renderer;
- return ge->glyph;
- }
- }
-
- return extendGlyphMap(*renderer, c);
-}
-
-static void initializeWidthIterator(WidthIterator *iterator, WebTextRenderer *renderer, const WebCoreTextRun *run, const WebCoreTextStyle *style)
-{
- iterator->renderer = renderer;
- iterator->run = run;
- iterator->style = style;
- iterator->currentCharacter = run->from;
- iterator->runWidthSoFar = 0;
- iterator->finalRoundingWidth = 0;
-
- // If the padding is non-zero, count the number of spaces in the run
- // and divide that by the padding for per space addition.
- if (!style->padding) {
- iterator->padding = 0;
- iterator->padPerSpace = 0;
- } else {
- float numSpaces = 0;
- int k;
- for (k = run->from; k < run->to; k++)
- if (isSpace(run->characters[k]))
- numSpaces++;
-
- iterator->padding = style->padding;
- iterator->padPerSpace = ceilf(iterator->padding / numSpaces);
- }
-
- // Calculate width up to starting position of the run. This is
- // necessary to ensure that our rounding hacks are always consistently
- // applied.
- if (run->from == 0) {
- iterator->widthToStart = 0;
- } else {
- WebCoreTextRun startPositionRun = *run;
- startPositionRun.from = 0;
- startPositionRun.to = run->length;
- WidthIterator startPositionIterator;
- initializeWidthIterator(&startPositionIterator, renderer, &startPositionRun, style);
- advanceWidthIterator(&startPositionIterator, run->from, 0, 0, 0);
- iterator->widthToStart = startPositionIterator.runWidthSoFar;
- }
-}
-
-static UChar32 normalizeVoicingMarks(WidthIterator *iterator)
-{
- unsigned currentCharacter = iterator->currentCharacter;
- const WebCoreTextRun *run = iterator->run;
- if (currentCharacter + 1 < (unsigned)run->to) {
- if (u_getCombiningClass(run->characters[currentCharacter + 1]) == HIRAGANA_KATAKANA_VOICING_MARKS) {
- // Normalize into composed form using 3.2 rules.
- UChar normalizedCharacters[2] = { 0, 0 };
- UErrorCode uStatus = 0;
- int32_t resultLength = unorm_normalize(&run->characters[currentCharacter], 2,
- UNORM_NFC, UNORM_UNICODE_3_2, &normalizedCharacters[0], 2, &uStatus);
- if (resultLength == 1 && uStatus == 0)
- return normalizedCharacters[0];
- }
- }
- return 0;
-}
-
-static unsigned advanceWidthIterator(WidthIterator *iterator, unsigned offset, float *widths, WebTextRenderer **renderersUsed, ATSGlyphRef *glyphsUsed)
-{
- const WebCoreTextRun *run = iterator->run;
- if (offset > (unsigned)run->to)
- offset = run->to;
-
- unsigned numGlyphs = 0;
-
- unsigned currentCharacter = iterator->currentCharacter;
- const UniChar *cp = &run->characters[currentCharacter];
-
- const WebCoreTextStyle *style = iterator->style;
- bool rtl = style->rtl;
- bool needCharTransform = rtl | style->smallCaps;
- bool hasExtraSpacing = style->letterSpacing | style->wordSpacing | style->padding;
-
- float runWidthSoFar = iterator->runWidthSoFar;
- float lastRoundingWidth = iterator->finalRoundingWidth;
-
- while (currentCharacter < offset) {
- UChar32 c = *cp;
-
- unsigned clusterLength = 1;
- if (c >= 0x3041) {
- if (c <= 0x30FE) {
- // Deal with Hiragana and Katakana voiced and semi-voiced syllables.
- // Normalize into composed form, and then look for glyph with base + combined mark.
- // Check above for character range to minimize performance impact.
- UChar32 normalized = normalizeVoicingMarks(iterator);
- if (normalized) {
- c = normalized;
- clusterLength = 2;
- }
- } else if (U16_IS_SURROGATE(c)) {
- if (!U16_IS_SURROGATE_LEAD(c))
- break;
-
- // Do we have a surrogate pair? If so, determine the full Unicode (32 bit)
- // code point before glyph lookup.
- // Make sure we have another character and it's a low surrogate.
- if (currentCharacter + 1 >= run->length)
- break;
- UniChar low = cp[1];
- if (!U16_IS_TRAIL(low))
- break;
- c = U16_GET_SUPPLEMENTARY(c, low);
- clusterLength = 2;
- }
- }
-
- WebTextRenderer *renderer = iterator->renderer;
-
- if (needCharTransform) {
- if (rtl)
- c = u_charMirror(c);
-
- // If small-caps, convert lowercase to upper.
- if (style->smallCaps && !u_isUUppercase(c)) {
- UChar32 upperC = u_toupper(c);
- if (upperC != c) {
- c = upperC;
- renderer = getSmallCapsRenderer(renderer);
- }
- }
- }
-
- ATSGlyphRef glyph = glyphForCharacter(&renderer, c);
-
- // Now that we have glyph and font, get its width.
- WebGlyphWidth width;
- if (c == '\t' && style->tabWidth) {
- width = style->tabWidth - fmodf(style->xpos + runWidthSoFar, style->tabWidth);
- } else {
- width = widthForGlyph(renderer, glyph);
- // We special case spaces in two ways when applying word rounding.
- // First, we round spaces to an adjusted width in all fonts.
- // Second, in fixed-pitch fonts we ensure that all characters that
- // match the width of the space character have the same width as the space character.
- if (width == renderer->spaceWidth && (renderer->treatAsFixedPitch || glyph == renderer->spaceGlyph) && style->applyWordRounding)
- width = renderer->adjustedSpaceWidth;
- }
-
- // Try to find a substitute font if this font didn't have a glyph for a character in the
- // string. If one isn't found we end up drawing and measuring the 0 glyph, usually a box.
- if (glyph == 0 && style->attemptFontSubstitution) {
- WebTextRenderer *substituteRenderer = findSubstituteRenderer(renderer, cp, clusterLength, style->families);
- if (substituteRenderer) {
- WebCoreTextRun clusterRun = { cp, clusterLength, 0, clusterLength };
- WebCoreTextStyle clusterStyle = *style;
- clusterStyle.padding = 0;
- clusterStyle.applyRunRounding = NO;
- clusterStyle.attemptFontSubstitution = NO;
-
- int cNumGlyphs;
- float localWidthBuffer[MAX_GLYPH_EXPANSION];
- WebTextRenderer *localRendererBuffer[MAX_GLYPH_EXPANSION];
- ATSGlyphRef localGlyphBuffer[MAX_GLYPH_EXPANSION];
- CG_floatWidthForRun(substituteRenderer, &clusterRun, &clusterStyle, localWidthBuffer, localRendererBuffer, localGlyphBuffer, 0, &cNumGlyphs);
- if (cNumGlyphs == 1) {
- ASSERT(substituteRenderer == localRendererBuffer[0]);
- width = localWidthBuffer[0];
- glyph = localGlyphBuffer[0];
- updateGlyphMapEntry(renderer, c, glyph, substituteRenderer);
- renderer = substituteRenderer;
- }
- }
- }
-
- if (hasExtraSpacing) {
- // Account for letter-spacing.
- if (width && style->letterSpacing)
- width += style->letterSpacing;
-
- if (isSpace(c)) {
- // Account for padding. WebCore uses space padding to justify text.
- // We distribute the specified padding over the available spaces in the run.
- if (style->padding) {
- // Use left over padding if not evenly divisible by number of spaces.
- if (iterator->padding < iterator->padPerSpace) {
- width += iterator->padding;
- iterator->padding = 0;
- } else {
- width += iterator->padPerSpace;
- iterator->padding -= iterator->padPerSpace;
- }
- }
-
- // Account for word spacing.
- // We apply additional space between "words" by adding width to the space character.
- if (currentCharacter != 0 && !isSpace(cp[-1]) && style->wordSpacing)
- width += style->wordSpacing;
- }
- }
-
- // Advance past the character we just dealt with.
- cp += clusterLength;
- currentCharacter += clusterLength;
-
- // Account for float/integer impedance mismatch between CG and KHTML. "Words" (characters
- // followed by a character defined by isRoundingHackCharacter()) are always an integer width.
- // We adjust the width of the last character of a "word" to ensure an integer width.
- // If we move KHTML to floats we can remove this (and related) hacks.
-
- float oldWidth = width;
-
- // Force characters that are used to determine word boundaries for the rounding hack
- // to be integer width, so following words will start on an integer boundary.
- if (style->applyWordRounding && isRoundingHackCharacter(c))
- width = ceilf(width);
-
- // Check to see if the next character is a "rounding hack character", if so, adjust
- // width so that the total run width will be on an integer boundary.
- if ((style->applyWordRounding && currentCharacter < run->length && isRoundingHackCharacter(*cp))
- || (style->applyRunRounding && currentCharacter >= (unsigned)run->to)) {
- float totalWidth = iterator->widthToStart + runWidthSoFar + width;
- width += ceilf(totalWidth) - totalWidth;
- }
-
- runWidthSoFar += width;
-
- if (!widths) {
- ASSERT(!renderersUsed);
- ASSERT(!glyphsUsed);
- } else {
- ASSERT(renderersUsed);
- ASSERT(glyphsUsed);
- *widths++ = (rtl ? oldWidth + lastRoundingWidth : width);
- *renderersUsed++ = renderer;
- *glyphsUsed++ = glyph;
- }
-
- lastRoundingWidth = width - oldWidth;
- ++numGlyphs;
- }
-
- iterator->currentCharacter = currentCharacter;
- iterator->runWidthSoFar = runWidthSoFar;
- iterator->finalRoundingWidth = lastRoundingWidth;
-
- return numGlyphs;
-}
-
-static bool fillStyleWithAttributes(ATSUStyle style, NSFont *theFont)
-{
- if (!theFont)
- return NO;
- ATSUFontID fontId = WKGetNSFontATSUFontId(theFont);
- LOG(FontCache, "fillStyleWithAttributes: font = %p,%@, _atsFontID = %x\n", theFont, theFont, (unsigned)fontId);
- if (!fontId)
- return NO;
- ATSUAttributeTag tag = kATSUFontTag;
- ByteCount size = sizeof(ATSUFontID);
- ATSUFontID *valueArray[1] = {&fontId};
- OSStatus status = ATSUSetAttributes(style, 1, &tag, &size, (void *)valueArray);
- if (status != noErr) {
- LOG(FontCache, "fillStyleWithAttributes failed(%d): font = %p,%@, _atsFontID = %x\n", (int)status, theFont, theFont, (unsigned)fontId);
- return NO;
- }
- return YES;
-}
-
-static bool shouldUseATSU(const WebCoreTextRun *run)
-{
- if (alwaysUseATSU)
- return YES;
-
- const UniChar *characters = run->characters;
- int to = run->to;
- int i;
- // Start from 0 since drawing and highlighting also measure the characters before run->from
- for (i = 0; i < to; i++) {
- UniChar c = characters[i];
- if (c < 0x300) // U+0300 through U+036F Combining diacritical marks
- continue;
- if (c <= 0x36F)
- return YES;
-
- if (c < 0x0591 || c == 0x05BE) // U+0591 through U+05CF excluding U+05BE Hebrew combining marks, Hebrew punctuation Paseq, Sof Pasuq and Nun Hafukha
- continue;
- if (c <= 0x05CF)
- return YES;
-
- if (c < 0x0600) // U+0600 through U+1059 Arabic, Syriac, Thaana, Devanagari, Bengali, Gurmukhi, Gujarati, Oriya, Tamil, Telugu, Kannada, Malayalam, Sinhala, Thai, Lao, Tibetan, Myanmar
- continue;
- if (c <= 0x1059)
- return YES;
-
- if (c < 0x1100) // U+1100 through U+11FF Hangul Jamo (only Ancient Korean should be left here if you precompose; Modern Korean will be precomposed as a result of step A)
- continue;
- if (c <= 0x11FF)
- return YES;
-
- if (c < 0x1780) // U+1780 through U+18AF Khmer, Mongolian
- continue;
- if (c <= 0x18AF)
- return YES;
-
- if (c < 0x1900) // U+1900 through U+194F Limbu (Unicode 4.0)
- continue;
- if (c <= 0x194F)
- return YES;
-
- if (c < 0x20D0) // U+20D0 through U+20FF Combining marks for symbols
- continue;
- if (c <= 0x20FF)
- return YES;
-
- if (c < 0xFE20) // U+FE20 through U+FE2F Combining half marks
- continue;
- if (c <= 0xFE2F)
- return YES;
- }
-
- return NO;
-}
+++ /dev/null
-/*
- * Copyright (C) 2005 Apple Computer, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#import <JavaScriptCore/Assertions.h>
-#import <WebKit/WebFrameBridge.h>
-#import <WebKit/WebKitLogging.h>
-#import <WebKit/WebKitSystemBits.h>
-#import <WebKit/WebPreferences.h>
-#import <WebKit/WebTextRendererFactory.h>
-#import <WebKit/WebTextRenderer.h>
-#import <WebKitSystemInterface.h>
-
-#import <mach-o/dyld.h>
-
-#define SYNTHESIZED_FONT_TRAITS (NSBoldFontMask | NSItalicFontMask)
-
-#define IMPORTANT_FONT_TRAITS (0 \
- | NSBoldFontMask \
- | NSCompressedFontMask \
- | NSCondensedFontMask \
- | NSExpandedFontMask \
- | NSItalicFontMask \
- | NSNarrowFontMask \
- | NSPosterFontMask \
- | NSSmallCapsFontMask \
-)
-
-#define DESIRED_WEIGHT 5
-
-@interface NSFont (WebPrivate)
-- (ATSUFontID)_atsFontID;
-@end
-
-@interface NSFont (WebAppKitSecretAPI)
-- (BOOL)_isFakeFixedPitch;
-@end
-
-@implementation WebTextRendererFactory
-
-static bool getAppDefaultValue(CFStringRef key, int *v)
-{
- CFPropertyListRef value;
-
- value = CFPreferencesCopyValue(key, kCFPreferencesCurrentApplication,
- kCFPreferencesAnyUser,
- kCFPreferencesAnyHost);
- if (value == 0) {
- value = CFPreferencesCopyValue(key, kCFPreferencesCurrentApplication,
- kCFPreferencesCurrentUser,
- kCFPreferencesAnyHost);
- if (value == 0)
- return false;
- }
-
- if (CFGetTypeID(value) == CFNumberGetTypeID()) {
- if (v != 0)
- CFNumberGetValue(value, kCFNumberIntType, v);
- } else if (CFGetTypeID(value) == CFStringGetTypeID()) {
- if (v != 0)
- *v = CFStringGetIntValue(value);
- } else {
- CFRelease(value);
- return false;
- }
-
- CFRelease(value);
- return true;
-}
-
-static bool getUserDefaultValue(CFStringRef key, int *v)
-{
- CFPropertyListRef value;
-
- value = CFPreferencesCopyValue(key, kCFPreferencesAnyApplication,
- kCFPreferencesCurrentUser,
- kCFPreferencesCurrentHost);
- if (value == 0)
- return false;
-
- if (CFGetTypeID(value) == CFNumberGetTypeID()) {
- if (v != 0)
- CFNumberGetValue(value, kCFNumberIntType, v);
- } else if (CFGetTypeID(value) == CFStringGetTypeID()) {
- if (v != 0)
- *v = CFStringGetIntValue(value);
- } else {
- CFRelease(value);
- return false;
- }
-
- CFRelease(value);
- return true;
-}
-
-static int getLCDScaleParameters(void)
-{
- int mode;
- CFStringRef key;
-
- key = CFSTR("AppleFontSmoothing");
- if (!getAppDefaultValue(key, &mode)) {
- if (!getUserDefaultValue(key, &mode))
- return 1;
- }
-
- if (WKFontSmoothingModeIsLCD(mode))
- return 4;
- return 1;
-}
-
-static CFMutableDictionaryRef fontCache;
-static CFMutableDictionaryRef fixedPitchFonts;
-
-- (void)clearCaches
-{
- int i;
- for (i = 0; i < WEB_TEXT_RENDERER_FACTORY_NUM_CACHES; ++i)
- [caches[i] removeAllObjects];
-
- if (fontCache)
- CFRelease(fontCache);
- fontCache = 0;
-
- if (fixedPitchFonts) {
- CFRelease(fixedPitchFonts);
- fixedPitchFonts = 0;
- }
-
- [super clearCaches];
-}
-
-static void
-fontsChanged( ATSFontNotificationInfoRef info, void *_factory)
-{
- WebTextRendererFactory *factory = (WebTextRendererFactory *)_factory;
-
- LOG (FontCache, "clearing font caches");
-
- ASSERT (factory);
-
- [factory clearCaches];
-}
-
-#define MINIMUM_GLYPH_CACHE_SIZE 1536 * 1024
-
-+ (void)createSharedFactory
-{
- if (![self sharedFactory]) {
- [[[self alloc] init] release];
-
- size_t s;
- if (WebSystemMainMemory() > 128 * 1024 * 1024)
- s = MINIMUM_GLYPH_CACHE_SIZE*getLCDScaleParameters();
- else
- s = MINIMUM_GLYPH_CACHE_SIZE;
-#ifndef NDEBUG
- LOG(CacheSizes, "Glyph cache size set to %d bytes.", s);
-#endif
- WKSetUpFontCache(s);
-
- // Ignore errors returned from ATSFontNotificationSubscribe. If we can't subscribe then we
- // won't be told about changes to fonts.
- ATSFontNotificationSubscribe( fontsChanged, kATSFontNotifyOptionDefault, (void *)[super sharedFactory], nil );
- }
- ASSERT([[self sharedFactory] isKindOfClass:self]);
-}
-
-+ (WebTextRendererFactory *)sharedFactory;
-{
- return (WebTextRendererFactory *)[super sharedFactory];
-}
-
-- (BOOL)isFontFixedPitch:(WebCoreFont)font
-{
- NSFont *f = font.font;
-
- if (!fixedPitchFonts)
- fixedPitchFonts = CFDictionaryCreateMutable(0, 0, &kCFTypeDictionaryKeyCallBacks, 0);
- CFBooleanRef val = CFDictionaryGetValue(fixedPitchFonts, f);
-
- BOOL ret;
- if (val) {
- ret = (val == kCFBooleanTrue);
- } else {
- // Special case Osaka-Mono.
- // According to <rdar://problem/3999467>, we should treat Osaka-Mono as fixed pitch.
- // Note that the AppKit does not report Osaka-Mono as fixed pitch.
-
- // Special case MS-PGothic.
- // According to <rdar://problem/4032938, we should not treat MS-PGothic as fixed pitch.
- // Note that AppKit does report MS-PGothic as fixed pitch.
-
- NSString *name = [f fontName];
- ret = ([f isFixedPitch] || [f _isFakeFixedPitch] || [name caseInsensitiveCompare:@"Osaka-Mono"] == NSOrderedSame)
- && ![name caseInsensitiveCompare:@"MS-PGothic"] == NSOrderedSame;
-
- CFDictionarySetValue(fixedPitchFonts, f, ret ? kCFBooleanTrue : kCFBooleanFalse);
- }
-
- return ret;
-}
-
-- init
-{
- [super init];
-
- int i;
- for (i = 0; i < WEB_TEXT_RENDERER_FACTORY_NUM_CACHES; ++i)
- caches[i] = [[NSMutableDictionary alloc] init];
-
- return self;
-}
-
-- (void)dealloc
-{
- int i;
- for (i = 0; i < WEB_TEXT_RENDERER_FACTORY_NUM_CACHES; ++i)
- [caches[i] release];
-
- [viewBuffers release];
- [viewStack release];
-
- [super dealloc];
-}
-
-- (WebTextRenderer *)rendererWithFont:(WebCoreFont)font
-{
- NSMutableDictionary *cache = caches[(font.syntheticBold << 2) | (font.syntheticOblique << 1) | font.forPrinter];
- WebTextRenderer *renderer = [cache objectForKey:font.font];
- if (renderer == nil) {
- renderer = [[WebTextRenderer alloc] initWithFont:font];
- [cache setObject:renderer forKey:font.font];
- [renderer release];
- }
- return renderer;
-}
-
-- (NSFont *)fallbackFontWithTraits:(NSFontTraitMask)traits size:(float)size
-{
- NSFont *font = [self cachedFontFromFamily:@"Helvetica" traits:traits size:size];
- if (font == nil) {
- // The Helvetica fallback will almost always work, since that's a basic
- // font that we ship with all systems. But in the highly unusual case where
- // the user removed Helvetica, we fall back on Lucida Grande because that's
- // guaranteed to be there, according to Nathan Taylor. This is good enough
- // to avoid a crash, at least. To reduce the possibility of failure even further,
- // we don't even bother with traits.
- font = [self cachedFontFromFamily:@"Lucida Grande" traits:0 size:size];
- }
- return font;
-}
-
-- (WebCoreFont)fontWithFamilies:(NSString **)families traits:(NSFontTraitMask)traits size:(float)size
-{
- NSFont *font = nil;
- NSString *matchedFamily = nil;
-
- int i = 0;
- while (families && families[i] != 0 && font == nil) {
- NSString *family = families[i++];
- if ([family length] != 0) {
- font = [self cachedFontFromFamily:family traits:traits size:size];
- if (font) {
- matchedFamily = family;
- break;
- }
- }
- }
-
- if (font == nil) {
- // We didn't find a font. Use a fallback font.
-
- // First we'll attempt to find an appropriate font using a match based on
- // the presence of keywords in the the requested names. For example, we'll
- // match any name that contains "Arabic" to Geeza Pro.
- i = 0;
- while (families && families[i] != 0 && font == nil) {
- NSString *family = families[i++];
- if ([family length] != 0) {
- static NSString * const matchWords[3] = { @"Arabic", @"Pashto", @"Urdu" };
- static NSString * const matchFamilies[3] = { @"Geeza Pro", @"Geeza Pro", @"Geeza Pro" };
- int j;
- for (j = 0; j < 3 && font == nil; ++j)
- if ([family rangeOfString:matchWords[j] options:NSCaseInsensitiveSearch].location != NSNotFound)
- font = [self cachedFontFromFamily:matchFamilies[j] traits:traits size:size];
- }
- }
-
- // Still nothing found, use the final fallback.
- if (font == nil)
- font = [self fallbackFontWithTraits:traits size:size];
- }
-
- NSFontTraitMask actualTraits = 0;
- if (traits & (NSItalicFontMask | NSBoldFontMask))
- actualTraits = [[NSFontManager sharedFontManager] traitsOfFont:font];
-
- WebCoreFont result;
- result.font = font;
- result.syntheticBold = (traits & NSBoldFontMask) && !(actualTraits & NSBoldFontMask);
- result.syntheticOblique = (traits & NSItalicFontMask) && !(actualTraits & NSItalicFontMask);
- result.forPrinter = NO;
-
- // There are some malformed fonts that will be correctly returned by -cachedFontForFamily:traits:size: as a match for a particular trait,
- // though -[NSFontManager traitsOfFont:] incorrectly claims the font does not have the specified trait. This could result in applying
- // synthetic bold on top of an already-bold font, as reported in <http://bugzilla.opendarwin.org/show_bug.cgi?id=6146>. To work around this
- // problem, if we got an apparent exact match, but the requested traits aren't present in the matched font, we'll try to get a font from
- // the same family without those traits (to apply the synthetic traits to later).
- if (matchedFamily) {
- NSFontTraitMask nonSyntheticTraits = traits;
-
- if (result.syntheticBold)
- nonSyntheticTraits &= ~NSBoldFontMask;
-
- if (result.syntheticOblique)
- nonSyntheticTraits &= ~NSItalicFontMask;
-
- if (nonSyntheticTraits != traits) {
- NSFont *fontWithoutSyntheticTraits = [self cachedFontFromFamily:matchedFamily traits:nonSyntheticTraits size:size];
- if (fontWithoutSyntheticTraits)
- result.font = fontWithoutSyntheticTraits;
- }
- }
-
- return result;
-}
-
-static BOOL acceptableChoice(NSFontTraitMask desiredTraits, int desiredWeight,
- NSFontTraitMask candidateTraits, int candidateWeight)
-{
- desiredTraits &= ~SYNTHESIZED_FONT_TRAITS;
- return (candidateTraits & desiredTraits) == desiredTraits;
-}
-
-static BOOL betterChoice(NSFontTraitMask desiredTraits, int desiredWeight,
- NSFontTraitMask chosenTraits, int chosenWeight,
- NSFontTraitMask candidateTraits, int candidateWeight)
-{
- if (!acceptableChoice(desiredTraits, desiredWeight, candidateTraits, candidateWeight)) {
- return NO;
- }
-
- // A list of the traits we care about.
- // The top item in the list is the worst trait to mismatch; if a font has this
- // and we didn't ask for it, we'd prefer any other font in the family.
- const NSFontTraitMask masks[] = {
- NSPosterFontMask,
- NSSmallCapsFontMask,
- NSItalicFontMask,
- NSCompressedFontMask,
- NSCondensedFontMask,
- NSExpandedFontMask,
- NSNarrowFontMask,
- NSBoldFontMask,
- 0 };
- int i = 0;
- NSFontTraitMask mask;
- while ((mask = masks[i++])) {
- BOOL desired = (desiredTraits & mask) != 0;
- BOOL chosenHasUnwantedTrait = desired != ((chosenTraits & mask) != 0);
- BOOL candidateHasUnwantedTrait = desired != ((candidateTraits & mask) != 0);
- if (!candidateHasUnwantedTrait && chosenHasUnwantedTrait)
- return YES;
- if (!chosenHasUnwantedTrait && candidateHasUnwantedTrait)
- return NO;
- }
-
- int chosenWeightDelta = chosenWeight - desiredWeight;
- int candidateWeightDelta = candidateWeight - desiredWeight;
-
- int chosenWeightDeltaMagnitude = ABS(chosenWeightDelta);
- int candidateWeightDeltaMagnitude = ABS(candidateWeightDelta);
-
- // Smaller magnitude wins.
- // If both have same magnitude, tie breaker is that the smaller weight wins.
- // Otherwise, first font in the array wins (should almost never happen).
- if (candidateWeightDeltaMagnitude < chosenWeightDeltaMagnitude) {
- return YES;
- }
- if (candidateWeightDeltaMagnitude == chosenWeightDeltaMagnitude && candidateWeight < chosenWeight) {
- return YES;
- }
-
- return NO;
-}
-
-// Family name is somewhat of a misnomer here. We first attempt to find an exact match
-// comparing the desiredFamily to the PostScript name of the installed fonts. If that fails
-// we then do a search based on the family names of the installed fonts.
-- (NSFont *)fontWithFamily:(NSString *)desiredFamily traits:(NSFontTraitMask)desiredTraits size:(float)size
-{
- NSFontManager *fontManager = [NSFontManager sharedFontManager];
- NSFont *font= nil;
-
- LOG (FontSelection, "looking for %@ with traits %x\n", desiredFamily, desiredTraits);
-
- // Look for an exact match first.
- NSEnumerator *availableFonts = [[fontManager availableFonts] objectEnumerator];
- NSString *availableFont;
- while ((availableFont = [availableFonts nextObject])) {
- if ([desiredFamily caseInsensitiveCompare:availableFont] == NSOrderedSame) {
- NSFont *nameMatchedFont = [NSFont fontWithName:availableFont size:size];
-
- // Special case Osaka-Mono. According to <rdar://problem/3999467>, we need to
- // treat Osaka-Mono as fixed pitch.
- if ([desiredFamily caseInsensitiveCompare:@"Osaka-Mono"] == NSOrderedSame && desiredTraits == 0) {
- LOG (FontSelection, "found exact match for Osaka-Mono\n");
- return nameMatchedFont;
- }
-
- NSFontTraitMask traits = [fontManager traitsOfFont:nameMatchedFont];
-
- if ((traits & desiredTraits) == desiredTraits){
- font = [fontManager convertFont:nameMatchedFont toHaveTrait:desiredTraits];
- LOG (FontSelection, "returning exact match (%@)\n\n", [[[font fontDescriptor] fontAttributes] objectForKey: NSFontNameAttribute]);
- return font;
- }
- LOG (FontSelection, "found exact match, but not desired traits, available traits %x\n", traits);
- break;
- }
- }
-
- // Do a simple case insensitive search for a matching font family.
- // NSFontManager requires exact name matches.
- // This addresses the problem of matching arial to Arial, etc., but perhaps not all the issues.
- NSEnumerator *e = [[fontManager availableFontFamilies] objectEnumerator];
- NSString *availableFamily;
- while ((availableFamily = [e nextObject])) {
- if ([desiredFamily caseInsensitiveCompare:availableFamily] == NSOrderedSame) {
- break;
- }
- }
-
- // Found a family, now figure out what weight and traits to use.
- BOOL choseFont = false;
- int chosenWeight = 0;
- NSFontTraitMask chosenTraits = 0;
-
- NSArray *fonts = [fontManager availableMembersOfFontFamily:availableFamily];
- unsigned n = [fonts count];
- unsigned i;
- for (i = 0; i < n; i++) {
- NSArray *fontInfo = [fonts objectAtIndex:i];
-
- // Array indices must be hard coded because of lame AppKit API.
- int fontWeight = [[fontInfo objectAtIndex:2] intValue];
- NSFontTraitMask fontTraits = [[fontInfo objectAtIndex:3] unsignedIntValue];
-
- BOOL newWinner;
- if (!choseFont) {
- newWinner = acceptableChoice(desiredTraits, DESIRED_WEIGHT, fontTraits, fontWeight);
- } else {
- newWinner = betterChoice(desiredTraits, DESIRED_WEIGHT, chosenTraits, chosenWeight, fontTraits, fontWeight);
- }
-
- if (newWinner) {
- choseFont = YES;
- chosenWeight = fontWeight;
- chosenTraits = fontTraits;
-
- if (chosenWeight == DESIRED_WEIGHT
- && (chosenTraits & IMPORTANT_FONT_TRAITS) == (desiredTraits & IMPORTANT_FONT_TRAITS)) {
- break;
- }
- }
- }
-
- if (!choseFont) {
- LOG (FontSelection, "nothing appropriate to return\n\n");
- return nil;
- }
-
- font = [fontManager fontWithFamily:availableFamily traits:chosenTraits weight:chosenWeight size:size];
- LOG (FontSelection, "returning font family %@ (%@) traits %x, fontID = %x\n\n",
- availableFamily, [[[font fontDescriptor] fontAttributes] objectForKey: NSFontNameAttribute], chosenTraits, (unsigned int)[font _atsFontID]);
-
- return font;
-}
-
-typedef struct {
- NSString *family;
- NSFontTraitMask traits;
- float size;
-} FontCacheKey;
-
-static const void *FontCacheKeyCopy(CFAllocatorRef allocator, const void *value)
-{
- const FontCacheKey *key = (const FontCacheKey *)value;
- FontCacheKey *result = malloc(sizeof(FontCacheKey));
- result->family = [key->family copy];
- result->traits = key->traits;
- result->size = key->size;
- return result;
-}
-
-static void FontCacheKeyFree(CFAllocatorRef allocator, const void *value)
-{
- const FontCacheKey *key = (const FontCacheKey *)value;
- [key->family release];
- free((void *)key);
-}
-
-static Boolean FontCacheKeyEqual(const void *value1, const void *value2)
-{
- const FontCacheKey *key1 = (const FontCacheKey *)value1;
- const FontCacheKey *key2 = (const FontCacheKey *)value2;
- return key1->size == key2->size && key1->traits == key2->traits && [key1->family isEqualToString:key2->family];
-}
-
-static CFHashCode FontCacheKeyHash(const void *value)
-{
- const FontCacheKey *key = (const FontCacheKey *)value;
- return [key->family hash] ^ key->traits ^ (int)key->size;
-}
-
-static const void *FontCacheValueRetain(CFAllocatorRef allocator, const void *value)
-{
- if (value != 0) {
- CFRetain(value);
- }
- return value;
-}
-
-static void FontCacheValueRelease(CFAllocatorRef allocator, const void *value)
-{
- if (value != 0) {
- CFRelease(value);
- }
-}
-
-- (NSFont *)cachedFontFromFamily:(NSString *)family traits:(NSFontTraitMask)traits size:(float)size
-{
- ASSERT(family);
-
- if (!fontCache) {
- static const CFDictionaryKeyCallBacks fontCacheKeyCallBacks = { 0, FontCacheKeyCopy, FontCacheKeyFree, 0, FontCacheKeyEqual, FontCacheKeyHash };
- static const CFDictionaryValueCallBacks fontCacheValueCallBacks = { 0, FontCacheValueRetain, FontCacheValueRelease, 0, 0 };
- fontCache = CFDictionaryCreateMutable(0, 0, &fontCacheKeyCallBacks, &fontCacheValueCallBacks);
- }
-
- const FontCacheKey fontKey = { family, traits, size };
- const void *value;
- NSFont *font;
- if (CFDictionaryGetValueIfPresent(fontCache, &fontKey, &value)) {
- font = (NSFont *)value;
- } else {
- if ([family length] == 0) {
- return nil;
- }
- font = [self fontWithFamily:family traits:traits size:size];
- CFDictionaryAddValue(fontCache, &fontKey, font);
- }
-
-#ifdef DEBUG_MISSING_FONT
- static int unableToFindFontCount = 0;
- if (font == nil) {
- unableToFindFontCount++;
- NSLog(@"unableToFindFontCount %@, traits 0x%08x, size %f, %d\n", family, traits, size, unableToFindFontCount);
- }
-#endif
-
- return font;
-}
-
-@end
git://git.webkit.org / WebKit-https.git / commitdiff