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23a22c597a
Editor creates a `<br>` element to end of a block if last line of the block is empty because caret should be placed as there is an empty line. Such special `<br>` element has `type` attribute whose value is "_moz". However, adding/removing the attribute is expensive and such hacky attribute shouldn't be referred nor changed by web apps. Therefore, this patch makes `HTMLBRElement` take another specific flag whether it's a special node for empty last line. For making the meaning clearer, this patch calls the such `<br>` elements as "padding `<br>` element for empty last line" insead of "moz-br". So, this patch also includes a lot of renaming methods and variables, and modifying related comments. Note that with this change, `IMEContentObserver` counts the padding `<br>` element in `<textarea>` because it's inserted before setting the new flag and setting the flag does not cause DOM tree mutation. This issue will be fixed by the following patches. Differential Revision: https://phabricator.services.mozilla.com/D39858 --HG-- extra : moz-landing-system : lando
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "TextEditUtils.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/HTMLBRElement.h"
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#include "nsAString.h"
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#include "nsCOMPtr.h"
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#include "nsCaseTreatment.h"
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#include "nsDebug.h"
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#include "nsError.h"
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#include "nsGkAtoms.h"
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#include "nsNameSpaceManager.h"
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#include "nsLiteralString.h"
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#include "nsString.h"
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namespace mozilla {
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using namespace dom;
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/******************************************************************************
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* TextEditUtils
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******************************************************************************/
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/**
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* IsBody() returns true if aNode is an html body node.
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*/
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bool TextEditUtils::IsBody(nsINode* aNode) {
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MOZ_ASSERT(aNode);
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return aNode->IsHTMLElement(nsGkAtoms::body);
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}
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/**
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* IsBreak() returns true if aNode is an html break node.
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*/
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bool TextEditUtils::IsBreak(nsINode* aNode) {
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MOZ_ASSERT(aNode);
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return aNode->IsHTMLElement(nsGkAtoms::br);
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}
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/******************************************************************************
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* AutoEditInitRulesTrigger
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******************************************************************************/
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AutoEditInitRulesTrigger::AutoEditInitRulesTrigger(TextEditor* aTextEditor,
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nsresult& aResult)
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: mTextEditor(aTextEditor), mResult(aResult) {
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if (mTextEditor) {
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mTextEditor->BeginEditorInit();
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}
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}
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AutoEditInitRulesTrigger::~AutoEditInitRulesTrigger() {
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if (mTextEditor) {
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mResult = MOZ_KnownLive(mTextEditor)->EndEditorInit();
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}
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}
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} // namespace mozilla
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