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1984592c22
This structure is per block formatting context because we have to make a single inflation decision for things like consecutive runs of paragraphs of text. Inflating some paragraphs and not others (within the same sequence of adjacent paragraphs) based on the amount of text in each one would be disastrous. Otherwise it's ideal for the units to be as small as possible as long as they merge such sequences; therefore this uses a definition corresponding to CSS's idea of elements that establish new block formatting contexts.
66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the font size inflation manager.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2012
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* Per-block-formatting-context manager of font size inflation for pan and zoom UI. */
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#ifndef nsFontInflationData_h_
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#define nsFontInflationData_h_
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#include "nsIFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsBlockFrame.h"
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class nsFontInflationData
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{
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public:
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static nsFontInflationData* FindFontInflationDataFor(const nsIFrame *aFrame);
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private:
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static const nsIFrame* FlowRootFor(const nsIFrame *aFrame)
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{
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while (!(aFrame->GetStateBits() & NS_FRAME_FONT_INFLATION_FLOW_ROOT)) {
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aFrame = aFrame->GetParent();
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}
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return aFrame;
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}
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};
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#endif /* !defined(nsFontInflationData_h_) */
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