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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
38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
/* -*- Mode: IDL; 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* The origin of this IDL file is
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* http://www.whatwg.org/specs/web-apps/current-work/#the-br-element
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* http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
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*
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* © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
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* Opera Software ASA. You are granted a license to use, reproduce
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* and create derivative works of this document.
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*/
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// http://www.whatwg.org/specs/web-apps/current-work/#the-br-element
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[HTMLConstructor]
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interface HTMLBRElement : HTMLElement {};
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// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
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partial interface HTMLBRElement {
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[CEReactions, SetterThrows]
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attribute DOMString clear;
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};
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// Mozilla extensions
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partial interface HTMLBRElement {
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// Set to true if the <br> element is created by editor for placing caret
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// at proper position in empty editor.
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[ChromeOnly]
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readonly attribute boolean isPaddingForEmptyEditor;
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// Set to true if the <br> element is created by editor for placing caret
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// at proper position making last empty line in a block element in HTML
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// editor or <textarea> element visible.
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[ChromeOnly]
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readonly attribute boolean isPaddingForEmptyLastLine;
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};
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