#include <atk/atk.h>
#include <glib.h>
#include <glib/gprintf.h>
+#include <libgail-util/gail-util.h>
#include <pango/pango.h>
using namespace WebCore;
return g_strdup(ret.utf8().data());
}
-enum GetTextFunctionType {
- AfterOffset,
- AtOffset,
- BeforeOffset
-};
-
-typedef bool (*isCharacterAttribute) (PangoLogAttr* attr);
-
-static inline bool isWordStart(PangoLogAttr* attr)
-{
- return attr->is_word_start;
-}
-
-static inline bool isWordEnd(PangoLogAttr* attr)
-{
- return attr->is_word_end;
-}
-
-static inline bool isSentenceStart(PangoLogAttr* attr)
-{
- return attr->is_sentence_start;
-}
-
-static inline bool isSentenceEnd(PangoLogAttr* attr)
-{
- return attr->is_sentence_end;
-}
-
-enum Direction {
- DirectionForward,
- DirectionBackwards
-};
-
-static bool findCharacterAttribute(isCharacterAttribute predicateFunction, PangoLogAttr* attributes, Direction direction, int startOffset, int attrsLength, int* resultOffset)
-{
- int advanceBy = direction == DirectionForward ? 1 : -1;
-
- *resultOffset = -1;
-
- for (int i = startOffset; i >= 0 && i < attrsLength; i += advanceBy) {
- if (predicateFunction(attributes + i)) {
- *resultOffset = i;
- return true;
- }
- }
-
- return false;
-}
-
-static bool findCharacterAttributeSkip(isCharacterAttribute predicateFunction, unsigned skip, PangoLogAttr* attributes, Direction direction, int startOffset, int attrsLength, int* resultOffset)
+static GailTextUtil* getGailTextUtilForAtk(AtkText* textObject)
{
- int tmpOffset;
+ gpointer data = g_object_get_data(G_OBJECT(textObject), "webkit-accessible-gail-text-util");
+ if (data)
+ return static_cast<GailTextUtil*>(data);
- bool retValue = findCharacterAttribute(predicateFunction, attributes, direction, startOffset, attrsLength, &tmpOffset);
- if (skip == 0) {
- *resultOffset = tmpOffset;
- return retValue;
- }
-
- if (direction == DirectionForward)
- tmpOffset++;
- else
- tmpOffset--;
-
- return findCharacterAttributeSkip(predicateFunction, skip - 1, attributes, direction, tmpOffset, attrsLength, resultOffset);
-}
-
-static isCharacterAttribute oppositePredicate(isCharacterAttribute predicate)
-{
- if (predicate == isWordStart)
- return isWordEnd;
- if (predicate == isWordEnd)
- return isWordStart;
- if (predicate == isSentenceStart)
- return isSentenceEnd;
- if (predicate == isSentenceEnd)
- return isSentenceStart;
-
- g_assert_not_reached();
-}
-
-static gchar* getTextHelper(GetTextFunctionType getTextFunctionType, AtkText* textObject, gint offset, AtkTextBoundary boundaryType, gint* startOffset, gint* endOffset)
-{
- AccessibilityObject* coreObject = core(textObject);
String text;
-
- *startOffset = *endOffset = -1;
+ AccessibilityObject* coreObject = core(textObject);
if (coreObject->isTextControl())
text = coreObject->text();
else
text = coreObject->textUnderElement();
- char* cText = g_strdup(text.utf8().data());
- glong textLength = g_utf8_strlen(cText, -1);
-
- if (boundaryType == ATK_TEXT_BOUNDARY_CHAR) {
- int effectiveOffset;
-
- switch (getTextFunctionType) {
- case AfterOffset:
- effectiveOffset = offset + 1;
- break;
- case BeforeOffset:
- effectiveOffset = offset - 1;
- break;
- case AtOffset:
- effectiveOffset = offset;
- break;
- default:
- g_assert_not_reached();
- }
-
- *startOffset = effectiveOffset;
- *endOffset = effectiveOffset + 1;
- } else {
- PangoLogAttr* attrs = g_new(PangoLogAttr, textLength + 1);
- PangoLanguage* language = pango_language_get_default();
- pango_get_log_attrs(cText, -1, -1, language, attrs, textLength + 1);
-
- isCharacterAttribute predicate;
-
- if (boundaryType == ATK_TEXT_BOUNDARY_WORD_START)
- predicate = isWordStart;
- else if (boundaryType == ATK_TEXT_BOUNDARY_WORD_END)
- predicate = isWordEnd;
- else if (boundaryType == ATK_TEXT_BOUNDARY_SENTENCE_START)
- predicate = isSentenceStart;
- else if (boundaryType == ATK_TEXT_BOUNDARY_SENTENCE_END)
- predicate = isSentenceEnd;
- else
- // FIXME: bail out for now, since we are missing the LINE
- // boundary implementations
- goto out;
-
- switch (boundaryType) {
- case ATK_TEXT_BOUNDARY_WORD_START:
- case ATK_TEXT_BOUNDARY_SENTENCE_START:
- if (getTextFunctionType == AfterOffset) {
- // Take the item after the current one in any case
- findCharacterAttribute(predicate, attrs, DirectionForward, offset + 1, textLength + 1, startOffset);
- findCharacterAttributeSkip(predicate, 1, attrs, DirectionForward, offset + 1, textLength + 1, endOffset);
- } else if (getTextFunctionType == AtOffset) {
- // Take the item at point if the offset is in an item or
- // the item before otherwise
- findCharacterAttribute(predicate, attrs, DirectionBackwards, offset, textLength + 1, startOffset);
- if (!findCharacterAttribute(predicate, attrs, DirectionForward, offset + 1, textLength + 1, endOffset)) {
- findCharacterAttribute(oppositePredicate(predicate), attrs, DirectionForward, offset + 1, textLength + 1, endOffset);
- // We want to include the actual end boundary
- // here, since *_START would have done so. Advance
- // until the end of the string if possible
- if (*endOffset != -1 && *endOffset < textLength)
- *endOffset = textLength;
- }
- } else {
- // Take the item before the point if the offset is in an
- // item, or the the item before that one otherwise
- findCharacterAttributeSkip(predicate, 1, attrs, DirectionBackwards, offset, textLength + 1, startOffset);
- findCharacterAttribute(predicate, attrs, DirectionBackwards, offset, textLength + 1, endOffset);
- }
- break;
- case ATK_TEXT_BOUNDARY_WORD_END:
- case ATK_TEXT_BOUNDARY_SENTENCE_END:
- if (getTextFunctionType == AfterOffset) {
- // Take the item after the current item if the offset is
- // in a item, or the item after that otherwise
- findCharacterAttribute(predicate, attrs, DirectionForward, offset, textLength + 1, startOffset);
- findCharacterAttributeSkip(predicate, 1, attrs, DirectionForward, offset, textLength + 1, endOffset);
- } else if (getTextFunctionType == AtOffset) {
- // Take the item at point if the offset is in a item or
- // the item after otherwise
- if (!findCharacterAttribute(predicate, attrs, DirectionBackwards, offset, textLength + 1, startOffset))
- // No match before offset, take the first opposite match at or before the offset
- findCharacterAttribute(oppositePredicate(predicate), attrs, DirectionBackwards, offset, textLength + 1, startOffset);
- findCharacterAttribute(predicate, attrs, DirectionForward, offset + 1, textLength + 1, endOffset);
- } else {
- // Take the item before the point in any case
- if (!findCharacterAttributeSkip(predicate, 1, attrs, DirectionBackwards, offset, textLength + 1, startOffset)) {
- int tmpOffset;
- // No match before offset, take the first opposite match at or before the offset
- findCharacterAttribute(predicate, attrs, DirectionBackwards, offset, textLength + 1, &tmpOffset);
- findCharacterAttribute(oppositePredicate(predicate), attrs, DirectionBackwards, tmpOffset - 1, textLength + 1, startOffset);
- }
- findCharacterAttribute(predicate, attrs, DirectionBackwards, offset, textLength + 1, endOffset);
- }
- break;
- default:
- g_assert_not_reached();
- }
-
- g_free(attrs);
- }
-
- out:
- if (*startOffset < 0 || *endOffset < 0) {
- *startOffset = *endOffset = 0;
- return g_strdup("");
- }
-
- char* start = g_utf8_offset_to_pointer(cText, (glong)*startOffset);
- char* end = g_utf8_offset_to_pointer(cText, (glong)*endOffset);
- char* resultText = g_strndup(start, end - start);
- g_free(cText);
- return resultText;
+ GailTextUtil* gailTextUtil = gail_text_util_new();
+ gail_text_util_text_setup(gailTextUtil, text.utf8().data());
+ g_object_set_data_full(G_OBJECT(textObject), "webkit-accessible-gail-text-util", gailTextUtil, g_object_unref);
+ return gailTextUtil;
}
static gchar* webkit_accessible_text_get_text_after_offset(AtkText* text, gint offset, AtkTextBoundary boundaryType, gint* startOffset, gint* endOffset)
{
- return getTextHelper(AfterOffset, text, offset, boundaryType, startOffset, endOffset);
+ return gail_text_util_get_text(getGailTextUtilForAtk(text), NULL, GAIL_AFTER_OFFSET, boundaryType, offset, startOffset, endOffset);
}
static gchar* webkit_accessible_text_get_text_at_offset(AtkText* text, gint offset, AtkTextBoundary boundaryType, gint* startOffset, gint* endOffset)
{
- return getTextHelper(AtOffset, text, offset, boundaryType, startOffset, endOffset);
+ return gail_text_util_get_text(getGailTextUtilForAtk(text), NULL, GAIL_AT_OFFSET, boundaryType, offset, startOffset, endOffset);
}
static gchar* webkit_accessible_text_get_text_before_offset(AtkText* text, gint offset, AtkTextBoundary boundaryType, gint* startOffset, gint* endOffset)
{
- return getTextHelper(BeforeOffset, text, offset, boundaryType, startOffset, endOffset);
+ return gail_text_util_get_text(getGailTextUtilForAtk(text), NULL, GAIL_BEFORE_OFFSET, boundaryType, offset, startOffset, endOffset);
}
static gunichar webkit_accessible_text_get_character_at_offset(AtkText* text, gint offset)
git://git.webkit.org / WebKit-https.git / commitdiff