зеркало из https://github.com/mozilla/gecko-dev.git
630 строки
19 KiB
C++
630 строки
19 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 "Accessible-inl.h"
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#include "HyperTextAccessible-inl.h"
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#include "nsMai.h"
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#include "ProxyAccessible.h"
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#include "nsIAccessibleTypes.h"
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#include "nsIPersistentProperties2.h"
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#include "nsISimpleEnumerator.h"
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#include "mozilla/Likely.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
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ConvertTextAttributeToAtkAttribute(const nsACString& aName,
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const nsAString& aValue,
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AtkAttributeSet** aAttributeSet)
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{
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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*
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ConvertToAtkTextAttributeSet(nsTArray<Attribute>& aAttributes)
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{
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AtkAttributeSet* objAttributeSet = nullptr;
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for (size_t i = 0; i < aAttributes.Length(); ++i) {
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AtkAttribute* objAttr = (AtkAttribute *)g_malloc(sizeof(AtkAttribute));
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objAttr->name = g_strdup(aAttributes[i].Name().get());
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objAttr->value =
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g_strdup(NS_ConvertUTF16toUTF8(aAttributes[i].Value()).get());
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objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
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ConvertTextAttributeToAtkAttribute(aAttributes[i].Name(),
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aAttributes[i].Value(),
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&objAttributeSet);
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}
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return objAttributeSet;
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}
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static AtkAttributeSet*
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ConvertToAtkTextAttributeSet(nsIPersistentProperties* aAttributes)
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{
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if (!aAttributes)
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return nullptr;
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AtkAttributeSet* objAttributeSet = nullptr;
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nsCOMPtr<nsISimpleEnumerator> propEnum;
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nsresult rv = aAttributes->Enumerate(getter_AddRefs(propEnum));
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NS_ENSURE_SUCCESS(rv, nullptr);
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bool hasMore = false;
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while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) {
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nsCOMPtr<nsISupports> sup;
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rv = propEnum->GetNext(getter_AddRefs(sup));
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NS_ENSURE_SUCCESS(rv, objAttributeSet);
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nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(sup));
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NS_ENSURE_TRUE(propElem, objAttributeSet);
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nsAutoCString name;
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rv = propElem->GetKey(name);
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NS_ENSURE_SUCCESS(rv, objAttributeSet);
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nsAutoString value;
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rv = propElem->GetValue(value);
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NS_ENSURE_SUCCESS(rv, objAttributeSet);
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AtkAttribute* objAttr = (AtkAttribute*)g_malloc(sizeof(AtkAttribute));
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objAttr->name = g_strdup(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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ConvertTextAttributeToAtkAttribute(name, value, &objAttributeSet);
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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
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ConvertTexttoAsterisks(AccessibleWrap* accWrap, nsAString& aString)
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{
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// convert each char to "*" when it's "password text"
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if (accWrap->NativeRole() == roles::PASSWORD_TEXT) {
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for (uint32_t i = 0; i < aString.Length(); i++)
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aString.Replace(i, 1, NS_LITERAL_STRING("*"));
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}
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}
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extern "C" {
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static gchar*
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getTextCB(AtkText *aText, gint aStartOffset, gint aEndOffset)
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{
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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())
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return nullptr;
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text->TextSubstring(aStartOffset, aEndOffset, autoStr);
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ConvertTexttoAsterisks(accWrap, autoStr);
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} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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proxy->TextSubstring(aStartOffset, aEndOffset, autoStr);
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}
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NS_ConvertUTF16toUTF8 cautoStr(autoStr);
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//copy and return, libspi will free it.
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return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
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}
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static gchar*
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getTextAfterOffsetCB(AtkText *aText, gint aOffset,
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AtkTextBoundary aBoundaryType,
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gint *aStartOffset, gint *aEndOffset)
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{
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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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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 nullptr;
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text->TextAfterOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
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ConvertTexttoAsterisks(accWrap, autoStr);
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} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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proxy->GetTextAfterOffset(aOffset, aBoundaryType, autoStr, &startOffset,
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&endOffset);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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NS_ConvertUTF16toUTF8 cautoStr(autoStr);
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return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
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}
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static gchar*
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getTextAtOffsetCB(AtkText *aText, gint aOffset,
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AtkTextBoundary aBoundaryType,
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gint *aStartOffset, gint *aEndOffset)
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{
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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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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 nullptr;
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text->TextAtOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
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ConvertTexttoAsterisks(accWrap, autoStr);
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} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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proxy->GetTextAtOffset(aOffset, aBoundaryType, autoStr, &startOffset,
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&endOffset);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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NS_ConvertUTF16toUTF8 cautoStr(autoStr);
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return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
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}
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static gunichar
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getCharacterAtOffsetCB(AtkText* aText, gint aOffset)
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{
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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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// char16_t is unsigned short in Mozilla, gnuichar is guint32 in glib.
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return static_cast<gunichar>(text->CharAt(aOffset));
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}
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if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return static_cast<gunichar>(proxy->CharAt(aOffset));
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}
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return 0;
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}
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static gchar*
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getTextBeforeOffsetCB(AtkText *aText, gint aOffset,
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AtkTextBoundary aBoundaryType,
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gint *aStartOffset, gint *aEndOffset)
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{
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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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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 nullptr;
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text->TextBeforeOffset(aOffset, aBoundaryType,
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&startOffset, &endOffset, autoStr);
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ConvertTexttoAsterisks(accWrap, autoStr);
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} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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proxy->GetTextBeforeOffset(aOffset, aBoundaryType, autoStr, &startOffset,
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&endOffset);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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NS_ConvertUTF16toUTF8 cautoStr(autoStr);
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return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
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}
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static gint
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getCaretOffsetCB(AtkText *aText)
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{
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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 static_cast<gint>(text->CaretOffset());
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}
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if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return static_cast<gint>(proxy->CaretOffset());
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}
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return 0;
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}
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static AtkAttributeSet*
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getRunAttributesCB(AtkText *aText, gint aOffset,
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gint *aStartOffset,
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gint *aEndOffset)
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{
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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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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 nullptr;
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}
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nsCOMPtr<nsIPersistentProperties> 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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ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText));
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if (!proxy) {
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return nullptr;
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}
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nsAutoTArray<Attribute, 10> attrs;
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proxy->TextAttributes(false, aOffset, &attrs, &startOffset, &endOffset);
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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return ConvertToAtkTextAttributeSet(attrs);
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}
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static AtkAttributeSet*
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getDefaultAttributesCB(AtkText *aText)
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{
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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 nullptr;
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}
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nsCOMPtr<nsIPersistentProperties> attributes = text->DefaultTextAttributes();
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return ConvertToAtkTextAttributeSet(attributes);
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}
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ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText));
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if (!proxy) {
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return nullptr;
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}
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nsAutoTArray<Attribute, 10> attrs;
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proxy->DefaultTextAttributes(&attrs);
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return ConvertToAtkTextAttributeSet(attrs);
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}
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static void
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getCharacterExtentsCB(AtkText *aText, gint aOffset,
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gint *aX, gint *aY,
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gint *aWidth, gint *aHeight,
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AtkCoordType aCoords)
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{
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if(!aX || !aY || !aWidth || !aHeight) {
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return;
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}
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nsIntRect rect;
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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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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;
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}
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rect = text->CharBounds(aOffset, geckoCoordType);
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} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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rect = proxy->CharBounds(aOffset, geckoCoordType);
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} else {
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return;
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}
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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
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getRangeExtentsCB(AtkText *aText, gint aStartOffset, gint aEndOffset,
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AtkCoordType aCoords, AtkTextRectangle *aRect)
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{
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if (!aRect) {
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return;
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}
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nsIntRect rect;
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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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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;
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}
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rect = text->TextBounds(aStartOffset, aEndOffset, geckoCoordType);
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} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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rect = proxy->TextBounds(aStartOffset, aEndOffset, geckoCoordType);
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} else {
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return;
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}
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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
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getCharacterCountCB(AtkText *aText)
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{
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (accWrap) {
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HyperTextAccessible* textAcc = accWrap->AsHyperText();
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return
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textAcc->IsDefunct() ? 0 : static_cast<gint>(textAcc->CharacterCount());
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}
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if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return proxy->CharacterCount();
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}
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return 0;
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}
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static gint
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getOffsetAtPointCB(AtkText *aText,
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gint aX, gint aY,
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AtkCoordType aCoords)
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{
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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 -1;
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}
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return static_cast<gint>(
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text->OffsetAtPoint(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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if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return static_cast<gint>(
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proxy->OffsetAtPoint(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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return -1;
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}
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static gint
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getTextSelectionCountCB(AtkText *aText)
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{
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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 text->SelectionCount();
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}
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if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
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return proxy->SelectionCount();
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}
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return 0;
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}
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static gchar*
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getTextSelectionCB(AtkText *aText, gint aSelectionNum,
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gint *aStartOffset, gint *aEndOffset)
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{
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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int32_t startOffset = 0, endOffset = 0;
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if (accWrap) {
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HyperTextAccessible* text = accWrap->AsHyperText();
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if (!text || !text->IsTextRole()) {
|
|
return nullptr;
|
|
}
|
|
|
|
text->SelectionBoundsAt(aSelectionNum, &startOffset, &endOffset);
|
|
*aStartOffset = startOffset;
|
|
*aEndOffset = endOffset;
|
|
|
|
return getTextCB(aText, *aStartOffset, *aEndOffset);
|
|
} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
|
|
nsString data;
|
|
proxy->SelectionBoundsAt(aSelectionNum, data, &startOffset, &endOffset);
|
|
*aStartOffset = startOffset;
|
|
*aEndOffset = endOffset;
|
|
|
|
NS_ConvertUTF16toUTF8 dataAsUTF8(data);
|
|
return (dataAsUTF8.get()) ? g_strdup(dataAsUTF8.get()) : nullptr;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// set methods
|
|
static gboolean
|
|
addTextSelectionCB(AtkText *aText,
|
|
gint aStartOffset,
|
|
gint aEndOffset)
|
|
{
|
|
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
|
|
if (accWrap) {
|
|
HyperTextAccessible* text = accWrap->AsHyperText();
|
|
if (!text || !text->IsTextRole()) {
|
|
return FALSE;
|
|
}
|
|
|
|
return text->AddToSelection(aStartOffset, aEndOffset);
|
|
} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
|
|
return proxy->AddToSelection(aStartOffset, aEndOffset);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
removeTextSelectionCB(AtkText *aText,
|
|
gint aSelectionNum)
|
|
{
|
|
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
|
|
if (accWrap) {
|
|
HyperTextAccessible* text = accWrap->AsHyperText();
|
|
if (!text || !text->IsTextRole()) {
|
|
return FALSE;
|
|
}
|
|
|
|
return text->RemoveFromSelection(aSelectionNum);
|
|
} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
|
|
return proxy->RemoveFromSelection(aSelectionNum);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
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);
|
|
} else if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
|
|
return proxy->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
setCaretOffsetCB(AtkText *aText, gint aOffset)
|
|
{
|
|
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
|
|
if (accWrap) {
|
|
HyperTextAccessible* text = accWrap->AsHyperText();
|
|
if (!text || !text->IsTextRole() || !text->IsValidOffset(aOffset)) {
|
|
return FALSE;
|
|
}
|
|
|
|
text->SetCaretOffset(aOffset);
|
|
return TRUE;
|
|
}
|
|
|
|
if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
|
|
proxy->SetCaretOffset(aOffset);
|
|
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;
|
|
|
|
// 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));
|
|
}
|