/* * (C) 1999 Lars Knoll (knoll@kde.org) * (C) 2000 Dirk Mueller (mueller@kde.org) * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public License * along with this library; see the file COPYING.LIB. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. * */ #include "config.h" #include "TextPainter.h" #include "GraphicsContext.h" #include "InlineTextBox.h" #include "RenderCombineText.h" #include "TextPaintStyle.h" namespace WebCore { TextPainter::TextPainter(GraphicsContext& context, bool paintSelectedTextOnly, bool paintSelectedTextSeparately, const Font& font, int startPositionInTextRun, int endPositionInTextBoxString, int length, const AtomicString& emphasisMark, RenderCombineText* combinedText, TextRun& textRun, FloatRect& boxRect, FloatPoint& textOrigin, int emphasisMarkOffset, const ShadowData* textShadow, const ShadowData* selectionShadow, bool textBoxIsHorizontal, TextPaintStyle& textPaintStyle, TextPaintStyle& selectionPaintStyle) : m_paintSelectedTextOnly(paintSelectedTextOnly) , m_paintSelectedTextSeparately(paintSelectedTextSeparately) , m_font(font) , m_startPositionInTextRun(startPositionInTextRun) , m_endPositionInTextRun(endPositionInTextBoxString) , m_length(length) , m_emphasisMark(emphasisMark) , m_combinedText(combinedText) , m_textRun(textRun) , m_boxRect(boxRect) , m_textOrigin(textOrigin) , m_emphasisMarkOffset(emphasisMarkOffset) , m_textBoxIsHorizontal(textBoxIsHorizontal) , m_savedDrawingStateForMask(&context, &textPaintStyle, &selectionPaintStyle, textShadow, selectionShadow) { } static void drawTextOrEmphasisMarks(GraphicsContext& context, const Font& font, const TextRun& textRun, const AtomicString& emphasisMark, int emphasisMarkOffset, const FloatPoint& point, const int from, const int to) { if (emphasisMark.isEmpty()) context.drawText(font, textRun, point, from, to); else context.drawEmphasisMarks(font, textRun, emphasisMark, point + IntSize(0, emphasisMarkOffset), from, to); } static bool isEmptyShadow(const ShadowData* shadow) { if (!shadow) return true; return shadow->location() == IntPoint() && !shadow->radius(); } static void paintTextWithShadows(GraphicsContext* context, const Font& font, const TextRun& textRun, const AtomicString& emphasisMark, int emphasisMarkOffset, int startOffset, int endOffset, int truncationPoint, const FloatPoint& textOrigin, const FloatRect& boxRect, const ShadowData* shadow, bool stroked, bool horizontal) { Color fillColor = context->fillColor(); ColorSpace fillColorSpace = context->fillColorSpace(); bool opaque = !fillColor.hasAlpha(); if (!opaque) context->setFillColor(Color::black, fillColorSpace); do { IntSize extraOffset; bool shadowIsEmpty = isEmptyShadow(shadow); if (!shadowIsEmpty) extraOffset = roundedIntSize(InlineTextBox::applyShadowToGraphicsContext(context, shadow, boxRect, stroked, opaque, horizontal)); else if (!opaque) context->setFillColor(fillColor, fillColorSpace); if (startOffset <= endOffset) drawTextOrEmphasisMarks(*context, font, textRun, emphasisMark, emphasisMarkOffset, textOrigin + extraOffset, startOffset, endOffset); else { if (endOffset > 0) drawTextOrEmphasisMarks(*context, font, textRun, emphasisMark, emphasisMarkOffset, textOrigin + extraOffset, 0, endOffset); if (startOffset < truncationPoint) drawTextOrEmphasisMarks(*context, font, textRun, emphasisMark, emphasisMarkOffset, textOrigin + extraOffset, startOffset, truncationPoint); } if (!shadow) break; if (shadow->next() || stroked || !opaque) context->restore(); else if (!shadowIsEmpty) context->clearShadow(); shadow = shadow->next(); } while (shadow || stroked || !opaque); } void TextPainter::paintText() { ASSERT(m_savedDrawingStateForMask.m_textPaintStyle); ASSERT(m_savedDrawingStateForMask.m_selectionPaintStyle); FloatPoint boxOrigin = m_boxRect.location(); if (!m_paintSelectedTextOnly) { // For stroked painting, we have to change the text drawing mode. It's probably dangerous to leave that mutated as a side // effect, so only when we know we're stroking, do a save/restore. GraphicsContextStateSaver stateSaver(*m_savedDrawingStateForMask.m_context, m_savedDrawingStateForMask.m_textPaintStyle->strokeWidth > 0); updateGraphicsContext(*m_savedDrawingStateForMask.m_context, *m_savedDrawingStateForMask.m_textPaintStyle); if (!m_paintSelectedTextSeparately || m_endPositionInTextRun <= m_startPositionInTextRun) { // FIXME: Truncate right-to-left text correctly. paintTextWithShadows(m_savedDrawingStateForMask.m_context, m_font, m_textRun, nullAtom, 0, 0, m_length, m_length, m_textOrigin, m_boxRect, m_savedDrawingStateForMask.m_textShadow, m_savedDrawingStateForMask.m_textPaintStyle->strokeWidth > 0, m_textBoxIsHorizontal); } else paintTextWithShadows(m_savedDrawingStateForMask.m_context, m_font, m_textRun, nullAtom, 0, m_endPositionInTextRun, m_startPositionInTextRun, m_length, m_textOrigin, m_boxRect, m_savedDrawingStateForMask.m_textShadow, m_savedDrawingStateForMask.m_textPaintStyle->strokeWidth > 0, m_textBoxIsHorizontal); if (!m_emphasisMark.isEmpty()) { updateGraphicsContext(*m_savedDrawingStateForMask.m_context, *m_savedDrawingStateForMask.m_textPaintStyle, UseEmphasisMarkColor); DEPRECATED_DEFINE_STATIC_LOCAL(TextRun, objectReplacementCharacterTextRun, (&objectReplacementCharacter, 1)); TextRun& emphasisMarkTextRun = m_combinedText ? objectReplacementCharacterTextRun : m_textRun; FloatPoint emphasisMarkTextOrigin = m_combinedText ? FloatPoint(boxOrigin.x() + m_boxRect.width() / 2, boxOrigin.y() + m_font.fontMetrics().ascent()) : m_textOrigin; if (m_combinedText) m_savedDrawingStateForMask.m_context->concatCTM(rotation(m_boxRect, Clockwise)); if (!m_paintSelectedTextSeparately || m_endPositionInTextRun <= m_startPositionInTextRun) { // FIXME: Truncate right-to-left text correctly. paintTextWithShadows(m_savedDrawingStateForMask.m_context, m_combinedText ? m_combinedText->originalFont() : m_font, emphasisMarkTextRun, m_emphasisMark, m_emphasisMarkOffset, 0, m_length, m_length, emphasisMarkTextOrigin, m_boxRect, m_savedDrawingStateForMask.m_textShadow, m_savedDrawingStateForMask.m_textPaintStyle->strokeWidth > 0, m_textBoxIsHorizontal); } else paintTextWithShadows(m_savedDrawingStateForMask.m_context, m_combinedText ? m_combinedText->originalFont() : m_font, emphasisMarkTextRun, m_emphasisMark, m_emphasisMarkOffset, m_endPositionInTextRun, m_startPositionInTextRun, m_length, emphasisMarkTextOrigin, m_boxRect, m_savedDrawingStateForMask.m_textShadow, m_savedDrawingStateForMask.m_textPaintStyle->strokeWidth > 0, m_textBoxIsHorizontal); if (m_combinedText) m_savedDrawingStateForMask.m_context->concatCTM(rotation(m_boxRect, Counterclockwise)); } } if ((m_paintSelectedTextOnly || m_paintSelectedTextSeparately) && m_startPositionInTextRun < m_endPositionInTextRun) { // paint only the text that is selected GraphicsContextStateSaver stateSaver(*m_savedDrawingStateForMask.m_context, m_savedDrawingStateForMask.m_selectionPaintStyle->strokeWidth > 0); updateGraphicsContext(*m_savedDrawingStateForMask.m_context, *m_savedDrawingStateForMask.m_selectionPaintStyle); paintTextWithShadows(m_savedDrawingStateForMask.m_context, m_font, m_textRun, nullAtom, 0, m_startPositionInTextRun, m_endPositionInTextRun, m_length, m_textOrigin, m_boxRect, m_savedDrawingStateForMask.m_selectionShadow, m_savedDrawingStateForMask.m_selectionPaintStyle->strokeWidth > 0, m_textBoxIsHorizontal); if (!m_emphasisMark.isEmpty()) { updateGraphicsContext(*m_savedDrawingStateForMask.m_context, *m_savedDrawingStateForMask.m_selectionPaintStyle, UseEmphasisMarkColor); DEPRECATED_DEFINE_STATIC_LOCAL(TextRun, objectReplacementCharacterTextRun, (&objectReplacementCharacter, 1)); TextRun& emphasisMarkTextRun = m_combinedText ? objectReplacementCharacterTextRun : m_textRun; FloatPoint emphasisMarkTextOrigin = m_combinedText ? FloatPoint(boxOrigin.x() + m_boxRect.width() / 2, boxOrigin.y() + m_font.fontMetrics().ascent()) : m_textOrigin; if (m_combinedText) m_savedDrawingStateForMask.m_context->concatCTM(rotation(m_boxRect, Clockwise)); paintTextWithShadows(m_savedDrawingStateForMask.m_context, m_combinedText ? m_combinedText->originalFont() : m_font, emphasisMarkTextRun, m_emphasisMark, m_emphasisMarkOffset, m_startPositionInTextRun, m_endPositionInTextRun, m_length, emphasisMarkTextOrigin, m_boxRect, m_savedDrawingStateForMask.m_selectionShadow, m_savedDrawingStateForMask.m_selectionPaintStyle->strokeWidth > 0, m_textBoxIsHorizontal); if (m_combinedText) m_savedDrawingStateForMask.m_context->concatCTM(rotation(m_boxRect, Counterclockwise)); } } } void TextPainter::paintTextInContext(GraphicsContext& context, float amountToIncreaseStrokeWidthBy) { SavedDrawingStateForMask savedDrawingStateForMask = m_savedDrawingStateForMask; ASSERT(m_savedDrawingStateForMask.m_textPaintStyle); ASSERT(m_savedDrawingStateForMask.m_selectionPaintStyle); m_savedDrawingStateForMask.m_context = &context; m_savedDrawingStateForMask.m_textPaintStyle->strokeWidth += amountToIncreaseStrokeWidthBy; m_savedDrawingStateForMask.m_selectionPaintStyle->strokeWidth += amountToIncreaseStrokeWidthBy; m_savedDrawingStateForMask.m_textShadow = nullptr; m_savedDrawingStateForMask.m_selectionShadow = nullptr; paintText(); m_savedDrawingStateForMask = savedDrawingStateForMask; } #if ENABLE(CSS3_TEXT_DECORATION_SKIP_INK) DashArray TextPainter::dashesForIntersectionsWithRect(const FloatRect& lineExtents) { return m_font.dashesForIntersectionsWithRect(m_textRun, m_textOrigin, lineExtents); } #endif } // namespace WebCore