зеркало из https://github.com/mozilla/gecko-dev.git
489 строки
14 KiB
C++
489 строки
14 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 "Accessible-inl.h"
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#include "HyperTextAccessible-inl.h"
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#include "nsMai.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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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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// 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 (name.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(value, 5, value.Length() - 1);
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FG_COLOR];
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} else if (name.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(value, 5, value.Length() - 1);
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_BG_COLOR];
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} else if (name.EqualsLiteral("font-family")) {
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atkValue = value;
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_FAMILY_NAME];
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} else if (name.EqualsLiteral("font-size")) {
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// ATK wants the number of pixels without px at the end.
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atkValue = StringHead(value, value.Length() - 2);
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_SIZE];
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} else if (name.EqualsLiteral("font-weight")) {
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atkValue = value;
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_WEIGHT];
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} else if (name.EqualsLiteral("invalid")) {
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atkValue = value;
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atkName = sAtkTextAttrNames[ATK_TEXT_ATTR_INVALID];
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}
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if (atkName) {
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objAttr = 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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objAttributeSet = g_slist_prepend(objAttributeSet, objAttr);
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}
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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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if (!accWrap)
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return nullptr;
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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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nsAutoString autoStr;
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text->TextSubstring(aStartOffset, aEndOffset, autoStr);
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ConvertTexttoAsterisks(accWrap, autoStr);
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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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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (!accWrap)
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return nullptr;
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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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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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text->TextAfterOffset(aOffset, aBoundaryType, &startOffset, &endOffset, autoStr);
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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ConvertTexttoAsterisks(accWrap, autoStr);
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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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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (!accWrap)
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return nullptr;
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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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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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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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ConvertTexttoAsterisks(accWrap, autoStr);
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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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return 0;
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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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// 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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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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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (!accWrap)
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return nullptr;
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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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nsAutoString autoStr;
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int32_t startOffset = 0, endOffset = 0;
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text->TextBeforeOffset(aOffset, aBoundaryType,
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&startOffset, &endOffset, autoStr);
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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ConvertTexttoAsterisks(accWrap, autoStr);
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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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return 0;
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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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return static_cast<gint>(text->CaretOffset());
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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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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (!accWrap)
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return nullptr;
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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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int32_t startOffset = 0, endOffset = 0;
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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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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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return nullptr;
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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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nsCOMPtr<nsIPersistentProperties> attributes = text->DefaultTextAttributes();
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return ConvertToAtkTextAttributeSet(attributes);
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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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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if(!accWrap || !aX || !aY || !aWidth || !aHeight)
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return;
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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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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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nsIntRect 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
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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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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if(!accWrap || !aRect)
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return;
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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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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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nsIntRect rect = 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
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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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return 0;
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HyperTextAccessible* textAcc = accWrap->AsHyperText();
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return textAcc->IsDefunct() ?
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0 : static_cast<gint>(textAcc->CharacterCount());
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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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return -1;
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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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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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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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return 0;
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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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return text->SelectionCount();
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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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if (!accWrap)
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return nullptr;
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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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int32_t startOffset = 0, endOffset = 0;
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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
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addTextSelectionCB(AtkText *aText,
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gint aStartOffset,
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gint aEndOffset)
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{
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (!accWrap)
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return FALSE;
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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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return text->AddToSelection(aStartOffset, aEndOffset);
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}
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static gboolean
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removeTextSelectionCB(AtkText *aText,
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gint aSelectionNum)
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{
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AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
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if (!accWrap)
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return FALSE;
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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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return text->RemoveFromSelection(aSelectionNum);
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}
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static gboolean
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setTextSelectionCB(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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if (!accWrap)
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return FALSE;
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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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return text->SetSelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset);
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}
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static gboolean
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setCaretOffsetCB(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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return FALSE;
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HyperTextAccessible* text = accWrap->AsHyperText();
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if (!text || !text->IsTextRole() || !text->IsValidOffset(aOffset))
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return FALSE;
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text->SetCaretOffset(aOffset);
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return TRUE;
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}
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}
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void
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textInterfaceInitCB(AtkTextIface* aIface)
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{
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NS_ASSERTION(aIface, "Invalid aIface");
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if (MOZ_UNLIKELY(!aIface))
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return;
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aIface->get_text = getTextCB;
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aIface->get_text_after_offset = getTextAfterOffsetCB;
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aIface->get_text_at_offset = getTextAtOffsetCB;
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aIface->get_character_at_offset = getCharacterAtOffsetCB;
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aIface->get_text_before_offset = getTextBeforeOffsetCB;
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aIface->get_caret_offset = getCaretOffsetCB;
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aIface->get_run_attributes = getRunAttributesCB;
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aIface->get_default_attributes = getDefaultAttributesCB;
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aIface->get_character_extents = getCharacterExtentsCB;
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aIface->get_range_extents = getRangeExtentsCB;
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aIface->get_character_count = getCharacterCountCB;
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aIface->get_offset_at_point = getOffsetAtPointCB;
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aIface->get_n_selections = getTextSelectionCountCB;
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aIface->get_selection = getTextSelectionCB;
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// set methods
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aIface->add_selection = addTextSelectionCB;
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aIface->remove_selection = removeTextSelectionCB;
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aIface->set_selection = setTextSelectionCB;
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aIface->set_caret_offset = setCaretOffsetCB;
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// Cache the string values of the atk text attribute names.
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for (uint32_t i = 0; i < ArrayLength(sAtkTextAttrNames); i++)
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sAtkTextAttrNames[i] =
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atk_text_attribute_get_name(static_cast<AtkTextAttribute>(i));
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}
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