mirror of
https://github.com/mozilla/gecko-dev.git
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fff810fb26
Most importantly, this means OffsetAtPoint is now supported for cached RemoteAccessible on Windows. I also included a drive-by fix to make ATK use the unified CharacterCount method instead of the old unnecessary conditional local/remote paths. Differential Revision: https://phabricator.services.mozilla.com/D154628
620 lines
18 KiB
C++
620 lines
18 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "InterfaceInitFuncs.h"
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#include "mozilla/a11y/PDocAccessible.h"
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#include "mozilla/StaticPrefs_accessibility.h"
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#include "LocalAccessible-inl.h"
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#include "HyperTextAccessible-inl.h"
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#include "nsMai.h"
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#include "RemoteAccessible.h"
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#include "AccAttributes.h"
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#include "nsIAccessibleTypes.h"
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#include "nsISimpleEnumerator.h"
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#include "nsUTF8Utils.h"
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#include "mozilla/Likely.h"
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#include "DOMtoATK.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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static const char* sAtkTextAttrNames[ATK_TEXT_ATTR_LAST_DEFINED];
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void ConvertTextAttributeToAtkAttribute(const nsACString& aName,
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const nsAString& aValue,
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AtkAttributeSet** aAttributeSet) {
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// Handle attributes where atk has its own name.
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const char* atkName = nullptr;
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nsAutoString atkValue;
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if (aName.EqualsLiteral("color")) {
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// The format of the atk attribute is r,g,b and the gecko one is
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// rgb(r, g, b).
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atkValue = Substring(aValue, 4, aValue.Length() - 5);
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atkValue.StripWhitespace();
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FG_COLOR];
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} else if (aName.EqualsLiteral("background-color")) {
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// The format of the atk attribute is r,g,b and the gecko one is
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// rgb(r, g, b).
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atkValue = Substring(aValue, 4, aValue.Length() - 5);
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atkValue.StripWhitespace();
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_BG_COLOR];
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} else if (aName.EqualsLiteral("font-family")) {
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atkValue = aValue;
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FAMILY_NAME];
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} else if (aName.EqualsLiteral("font-size")) {
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// ATK wants the number of pixels without px at the end.
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atkValue = StringHead(aValue, aValue.Length() - 2);
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_SIZE];
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} else if (aName.EqualsLiteral("font-weight")) {
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atkValue = aValue;
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_WEIGHT];
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} else if (aName.EqualsLiteral("invalid")) {
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atkValue = aValue;
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_INVALID];
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}
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if (atkName) {
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AtkAttribute* objAttr =
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static_cast<AtkAttribute*>(g_malloc(sizeof(AtkAttribute)));
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objAttr->name = g_strdup(atkName);
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objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(atkValue).get());
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*aAttributeSet = g_slist_prepend(*aAttributeSet, objAttr);
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}
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}
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static AtkAttributeSet* ConvertToAtkTextAttributeSet(
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AccAttributes* aAttributes) {
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if (!aAttributes) {
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// This can happen if an Accessible dies in the content process, but the
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// parent hasn't been udpated yet.
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return nullptr;
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}
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AtkAttributeSet* objAttributeSet = nullptr;
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for (auto iter : *aAttributes) {
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nsAutoString name;
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iter.NameAsString(name);
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nsAutoString value;
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iter.ValueAsString(value);
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AtkAttribute* objAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute));
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objAttr->name = g_strdup(NS_ConvertUTF16toUTF8(name).get());
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objAttr->value = g_strdup(NS_ConvertUTF16toUTF8(value).get());
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objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
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}
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// libatk-adaptor will free it
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return objAttributeSet;
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}
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static void ConvertTexttoAsterisks(Accessible* aAcc, nsAString& aString) {
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// convert each char to "*" when it's "password text"
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if (aAcc->IsPassword()) {
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DOMtoATK::ConvertTexttoAsterisks(aString);
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}
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}
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extern "C" {
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static gchar* getTextCB(AtkText* aText, gint aStartOffset, gint aEndOffset) {
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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nsAutoString autoStr;
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if (accWrap) {
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HyperTextAccessible* text = accWrap->AsHyperText();
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if (!text || !text->IsTextRole() || text->IsDefunct()) return nullptr;
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return DOMtoATK::NewATKString(
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text, aStartOffset, aEndOffset,
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accWrap->IsPassword()
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? DOMtoATK::AtkStringConvertFlags::ConvertTextToAsterisks
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: DOMtoATK::AtkStringConvertFlags::None);
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} else if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return DOMtoATK::NewATKString(proxy, aStartOffset, aEndOffset,
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DOMtoATK::AtkStringConvertFlags::None);
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}
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return nullptr;
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}
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static gint getCharacterCountCB(AtkText* aText);
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// Note: this does not support magic offsets, which is fine for its callers
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// which do not implement any.
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static gchar* getCharTextAtOffset(AtkText* aText, gint aOffset,
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gint* aStartOffset, gint* aEndOffset) {
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gint end = aOffset + 1;
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gint count = getCharacterCountCB(aText);
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if (aOffset > count) {
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aOffset = count;
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}
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if (end > count) {
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end = count;
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}
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if (aOffset < 0) {
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aOffset = 0;
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}
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if (end < 0) {
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end = 0;
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}
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*aStartOffset = aOffset;
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*aEndOffset = end;
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return getTextCB(aText, aOffset, end);
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}
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static gchar* getTextAfterOffsetCB(AtkText* aText, gint aOffset,
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AtkTextBoundary aBoundaryType,
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gint* aStartOffset, gint* aEndOffset) {
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if (aBoundaryType == ATK_TEXT_BOUNDARY_CHAR) {
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return getCharTextAtOffset(aText, aOffset + 1, aStartOffset, aEndOffset);
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}
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return nullptr;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return nullptr;
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}
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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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text->TextAfterOffset(aOffset, aBoundaryType, &startOffset, &endOffset,
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autoStr);
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if (acc->IsLocal()) {
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// XXX Is this needed any more? Masking of passwords is handled in
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// cross-platform code.
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ConvertTexttoAsterisks(acc, autoStr);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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// libspi will free it.
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return DOMtoATK::Convert(autoStr);
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}
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static gchar* getTextAtOffsetCB(AtkText* aText, gint aOffset,
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AtkTextBoundary aBoundaryType,
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gint* aStartOffset, gint* aEndOffset) {
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if (aBoundaryType == ATK_TEXT_BOUNDARY_CHAR) {
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return getCharTextAtOffset(aText, aOffset, aStartOffset, aEndOffset);
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}
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return nullptr;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return nullptr;
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}
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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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text->TextAtOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
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if (acc->IsLocal()) {
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// XXX Is this needed any more? Masking of passwords is handled in
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// cross-platform code.
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ConvertTexttoAsterisks(acc, autoStr);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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// libspi will free it.
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return DOMtoATK::Convert(autoStr);
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}
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static gunichar getCharacterAtOffsetCB(AtkText* aText, gint aOffset) {
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (accWrap) {
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HyperTextAccessible* text = accWrap->AsHyperText();
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if (!text || !text->IsTextRole()) {
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return 0;
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}
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return DOMtoATK::ATKCharacter(text, aOffset);
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}
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if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return DOMtoATK::ATKCharacter(proxy, aOffset);
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}
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return 0;
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}
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static gchar* getTextBeforeOffsetCB(AtkText* aText, gint aOffset,
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AtkTextBoundary aBoundaryType,
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gint* aStartOffset, gint* aEndOffset) {
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if (aBoundaryType == ATK_TEXT_BOUNDARY_CHAR) {
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return getCharTextAtOffset(aText, aOffset - 1, aStartOffset, aEndOffset);
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}
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return nullptr;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return nullptr;
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}
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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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text->TextBeforeOffset(aOffset, aBoundaryType, &startOffset, &endOffset,
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autoStr);
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if (acc->IsLocal()) {
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// XXX Is this needed any more? Masking of passwords is handled in
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// cross-platform code.
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ConvertTexttoAsterisks(acc, autoStr);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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// libspi will free it.
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return DOMtoATK::Convert(autoStr);
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}
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static gint getCaretOffsetCB(AtkText* aText) {
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return -1;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return -1;
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}
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return static_cast<gint>(text->CaretOffset());
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}
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static AtkAttributeSet* getRunAttributesCB(AtkText* aText, gint aOffset,
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gint* aStartOffset,
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gint* aEndOffset) {
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*aStartOffset = -1;
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*aEndOffset = -1;
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int32_t startOffset = 0, endOffset = 0;
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return nullptr;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return nullptr;
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}
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RefPtr<AccAttributes> attributes =
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text->TextAttributes(false, aOffset, &startOffset, &endOffset);
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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return ConvertToAtkTextAttributeSet(attributes);
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}
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static AtkAttributeSet* getDefaultAttributesCB(AtkText* aText) {
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return nullptr;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return nullptr;
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}
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RefPtr<AccAttributes> attributes = text->DefaultTextAttributes();
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return ConvertToAtkTextAttributeSet(attributes);
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}
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static void getCharacterExtentsCB(AtkText* aText, gint aOffset, gint* aX,
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gint* aY, gint* aWidth, gint* aHeight,
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AtkCoordType aCoords) {
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if (!aX || !aY || !aWidth || !aHeight) {
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return;
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}
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*aX = *aY = *aWidth = *aHeight = -1;
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uint32_t geckoCoordType;
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if (aCoords == ATK_XY_SCREEN) {
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geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
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} else {
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geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
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}
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return;
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}
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LayoutDeviceIntRect rect = text->CharBounds(aOffset, geckoCoordType);
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*aX = rect.x;
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*aY = rect.y;
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*aWidth = rect.width;
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*aHeight = rect.height;
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}
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static void getRangeExtentsCB(AtkText* aText, gint aStartOffset,
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gint aEndOffset, AtkCoordType aCoords,
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AtkTextRectangle* aRect) {
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if (!aRect) {
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return;
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}
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aRect->x = aRect->y = aRect->width = aRect->height = -1;
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uint32_t geckoCoordType;
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if (aCoords == ATK_XY_SCREEN) {
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geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE;
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} else {
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geckoCoordType = nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE;
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}
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return;
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}
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LayoutDeviceIntRect rect =
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text->TextBounds(aStartOffset, aEndOffset, geckoCoordType);
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aRect->x = rect.x;
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aRect->y = rect.y;
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aRect->width = rect.width;
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aRect->height = rect.height;
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}
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static gint getCharacterCountCB(AtkText* aText) {
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if (Accessible* acc = GetInternalObj(ATK_OBJECT(aText))) {
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if (HyperTextAccessibleBase* text = acc->AsHyperTextBase()) {
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return static_cast<gint>(text->CharacterCount());
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}
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}
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return 0;
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}
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static gint getOffsetAtPointCB(AtkText* aText, gint aX, gint aY,
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AtkCoordType aCoords) {
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return -1;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return -1;
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}
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return static_cast<gint>(text->OffsetAtPoint(
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aX, aY,
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(aCoords == ATK_XY_SCREEN
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? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
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: nsIAccessibleCoordinateType::COORDTYPE_WINDOW_RELATIVE)));
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}
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static gint getTextSelectionCountCB(AtkText* aText) {
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return 0;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return 0;
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}
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return text->SelectionCount();
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}
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static gchar* getTextSelectionCB(AtkText* aText, gint aSelectionNum,
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gint* aStartOffset, gint* aEndOffset) {
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Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
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if (!acc) {
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return nullptr;
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}
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int32_t startOffset = 0, endOffset = 0;
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if (acc->IsRemote() &&
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!StaticPrefs::accessibility_cache_enabled_AtStartup()) {
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RemoteAccessible* remote = acc->AsRemote();
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nsString data;
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remote->SelectionBoundsAt(aSelectionNum, data, &startOffset, &endOffset);
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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NS_ConvertUTF16toUTF8 dataAsUTF8(data);
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return (dataAsUTF8.get()) ? g_strdup(dataAsUTF8.get()) : nullptr;
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}
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HyperTextAccessibleBase* text = acc->AsHyperTextBase();
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if (!text || !acc->IsTextRole()) {
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return nullptr;
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}
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text->SelectionBoundsAt(aSelectionNum, &startOffset, &endOffset);
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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return getTextCB(aText, *aStartOffset, *aEndOffset);
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}
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// set methods
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static gboolean addTextSelectionCB(AtkText* aText, gint aStartOffset,
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gint aEndOffset) {
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (accWrap) {
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HyperTextAccessible* text = accWrap->AsHyperText();
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if (!text || !text->IsTextRole()) {
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return FALSE;
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}
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return text->AddToSelection(aStartOffset, aEndOffset);
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}
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if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return proxy->AddToSelection(aStartOffset, aEndOffset);
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}
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return FALSE;
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}
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static gboolean removeTextSelectionCB(AtkText* aText, gint aSelectionNum) {
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (accWrap) {
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HyperTextAccessible* text = accWrap->AsHyperText();
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if (!text || !text->IsTextRole()) {
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return FALSE;
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}
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return text->RemoveFromSelection(aSelectionNum);
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}
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if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return proxy->RemoveFromSelection(aSelectionNum);
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}
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return FALSE;
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|
}
|
|
|
|
static gboolean setTextSelectionCB(AtkText* aText, gint aSelectionNum,
|
|
gint aStartOffset, gint aEndOffset) {
|
|
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
|
|
if (accWrap) {
|
|
HyperTextAccessible* text = accWrap->AsHyperText();
|
|
if (!text || !text->IsTextRole()) {
|
|
return FALSE;
|
|
}
|
|
|
|
return text->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
|
|
}
|
|
if (RemoteAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
|
|
return proxy->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean setCaretOffsetCB(AtkText* aText, gint aOffset) {
|
|
Accessible* acc = GetInternalObj(ATK_OBJECT(aText));
|
|
if (!acc) {
|
|
return FALSE;
|
|
}
|
|
|
|
HyperTextAccessibleBase* text = acc->AsHyperTextBase();
|
|
if (!text || !acc->IsTextRole()) {
|
|
return FALSE;
|
|
}
|
|
|
|
text->SetCaretOffset(aOffset);
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean scrollSubstringToCB(AtkText* aText, gint aStartOffset,
|
|
gint aEndOffset, AtkScrollType aType) {
|
|
AtkObject* atkObject = ATK_OBJECT(aText);
|
|
AccessibleWrap* accWrap = GetAccessibleWrap(atkObject);
|
|
if (accWrap) {
|
|
HyperTextAccessible* text = accWrap->AsHyperText();
|
|
if (!text || !text->IsTextRole() ||
|
|
!text->IsValidRange(aStartOffset, aEndOffset)) {
|
|
return FALSE;
|
|
}
|
|
text->ScrollSubstringTo(aStartOffset, aEndOffset, aType);
|
|
return TRUE;
|
|
}
|
|
|
|
RemoteAccessible* proxy = GetProxy(atkObject);
|
|
if (proxy) {
|
|
proxy->ScrollSubstringTo(aStartOffset, aEndOffset, aType);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean scrollSubstringToPointCB(AtkText* aText, gint aStartOffset,
|
|
gint aEndOffset, AtkCoordType aCoords,
|
|
gint aX, gint aY) {
|
|
AtkObject* atkObject = ATK_OBJECT(aText);
|
|
AccessibleWrap* accWrap = GetAccessibleWrap(atkObject);
|
|
if (accWrap) {
|
|
HyperTextAccessible* text = accWrap->AsHyperText();
|
|
if (!text || !text->IsTextRole() ||
|
|
!text->IsValidRange(aStartOffset, aEndOffset)) {
|
|
return FALSE;
|
|
}
|
|
text->ScrollSubstringToPoint(aStartOffset, aEndOffset, aCoords, aX, aY);
|
|
return TRUE;
|
|
}
|
|
|
|
RemoteAccessible* proxy = GetProxy(atkObject);
|
|
if (proxy) {
|
|
proxy->ScrollSubstringToPoint(aStartOffset, aEndOffset, aCoords, aX, aY);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
void textInterfaceInitCB(AtkTextIface* aIface) {
|
|
NS_ASSERTION(aIface, "Invalid aIface");
|
|
if (MOZ_UNLIKELY(!aIface)) return;
|
|
|
|
aIface->get_text = getTextCB;
|
|
aIface->get_text_after_offset = getTextAfterOffsetCB;
|
|
aIface->get_text_at_offset = getTextAtOffsetCB;
|
|
aIface->get_character_at_offset = getCharacterAtOffsetCB;
|
|
aIface->get_text_before_offset = getTextBeforeOffsetCB;
|
|
aIface->get_caret_offset = getCaretOffsetCB;
|
|
aIface->get_run_attributes = getRunAttributesCB;
|
|
aIface->get_default_attributes = getDefaultAttributesCB;
|
|
aIface->get_character_extents = getCharacterExtentsCB;
|
|
aIface->get_range_extents = getRangeExtentsCB;
|
|
aIface->get_character_count = getCharacterCountCB;
|
|
aIface->get_offset_at_point = getOffsetAtPointCB;
|
|
aIface->get_n_selections = getTextSelectionCountCB;
|
|
aIface->get_selection = getTextSelectionCB;
|
|
|
|
// set methods
|
|
aIface->add_selection = addTextSelectionCB;
|
|
aIface->remove_selection = removeTextSelectionCB;
|
|
aIface->set_selection = setTextSelectionCB;
|
|
aIface->set_caret_offset = setCaretOffsetCB;
|
|
|
|
if (IsAtkVersionAtLeast(2, 32)) {
|
|
aIface->scroll_substring_to = scrollSubstringToCB;
|
|
aIface->scroll_substring_to_point = scrollSubstringToPointCB;
|
|
}
|
|
|
|
// Cache the string values of the atk text attribute names.
|
|
for (uint32_t i = 0; i < ArrayLength(sAtkTextAttrNames); i++) {
|
|
sAtkTextAttrNames[i] =
|
|
atk_text_attribute_get_name(static_cast<AtkTextAttribute>(i));
|
|
}
|
|
}
|