Source/core/rendering/TextAutosizer.h - Issue 14146029: Fix textarea font autosizing oscillation when the number of lines exceeds 4. The proposed fix is no…

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Issue 14146029: Fix textarea font autosizing oscillation when the number of lines exceeds 4. The proposed fix is no… (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: autosize textareas by default Created 7 years, 8 months ago

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« LayoutTests/fast/text-autosizing/textarea-fontsize-change-expected.html ('K') | « LayoutTests/fast/text-autosizing/textarea-fontsize-change-expected.html ('k') | Source/core/rendering/TextAutosizer.cpp » ('j') | Source/core/rendering/TextAutosizer.cpp » ('J')
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1 /*	1 /*

2 * Copyright (C) 2012 Google Inc. All rights reserved.	2 * Copyright (C) 2012 Google Inc. All rights reserved.

3 *	3 *

4 * Redistribution and use in source and binary forms, with or without	4 * Redistribution and use in source and binary forms, with or without

5 * modification, are permitted provided that the following conditions	5 * modification, are permitted provided that the following conditions

6 * are met:	6 * are met:

7 *	7 *

8 * 1. Redistributions of source code must retain the above copyright	8 * 1. Redistributions of source code must retain the above copyright

9 * notice, this list of conditions and the following disclaimer.	9 * notice, this list of conditions and the following disclaimer.

10 * 2. Redistributions in binary form must reproduce the above copyright	10 * 2. Redistributions in binary form must reproduce the above copyright

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72	72

73 static bool isAutosizingContainer(const RenderObject*);	73 static bool isAutosizingContainer(const RenderObject*);

74 static bool isNarrowDescendant(const RenderBlock*, TextAutosizingClusterInfo & parentClusterInfo);	74 static bool isNarrowDescendant(const RenderBlock*, TextAutosizingClusterInfo & parentClusterInfo);

75 static bool isWiderDescendant(const RenderBlock*, const TextAutosizingCluste rInfo& parentClusterInfo);	75 static bool isWiderDescendant(const RenderBlock*, const TextAutosizingCluste rInfo& parentClusterInfo);

76 static bool isIndependentDescendant(const RenderBlock*);	76 static bool isIndependentDescendant(const RenderBlock*);

77 static bool isAutosizingCluster(const RenderBlock*, TextAutosizingClusterInf o& parentClusterInfo);	77 static bool isAutosizingCluster(const RenderBlock*, TextAutosizingClusterInf o& parentClusterInfo);

78	78

79 static bool containerShouldBeAutosized(const RenderBlock* container);	79 static bool containerShouldBeAutosized(const RenderBlock* container);

80 static bool containerContainsOneOfTags(const RenderBlock* cluster, const Vec tor<QualifiedName>& tags);	80 static bool containerContainsOneOfTags(const RenderBlock* cluster, const Vec tor<QualifiedName>& tags);

81 static bool containerIsRowOfLinks(const RenderObject* container);	81 static bool containerIsRowOfLinks(const RenderObject* container);

	82 static bool containerIsTextArea(const RenderBlock* container);

82 static bool contentHeightIsConstrained(const RenderBlock* container);	83 static bool contentHeightIsConstrained(const RenderBlock* container);

83 static bool clusterShouldBeAutosized(TextAutosizingClusterInfo&, float block Width);	84 static bool clusterShouldBeAutosized(TextAutosizingClusterInfo&, float block Width);

84 static bool compositeClusterShouldBeAutosized(Vector<TextAutosizingClusterIn fo>&, float blockWidth);	85 static bool compositeClusterShouldBeAutosized(Vector<TextAutosizingClusterIn fo>&, float blockWidth);

85 static void measureDescendantTextWidth(const RenderBlock* container, TextAut osizingClusterInfo&, float minTextWidth, float& textWidth);	86 static void measureDescendantTextWidth(const RenderBlock* container, TextAut osizingClusterInfo&, float minTextWidth, float& textWidth);

86	87

87 // Use to traverse the tree of descendants, excluding descendants of contain ers (but returning the containers themselves).	88 // Use to traverse the tree of descendants, excluding descendants of contain ers (but returning the containers themselves).

88 static RenderObject* nextInPreOrderSkippingDescendantsOfContainers(const Ren derObject, const RenderObject stayWithin);	89 static RenderObject* nextInPreOrderSkippingDescendantsOfContainers(const Ren derObject, const RenderObject stayWithin);

89	90

90 static const RenderBlock* findDeepestBlockContainingAllText(const RenderBloc k* cluster);	91 static const RenderBlock* findDeepestBlockContainingAllText(const RenderBloc k* cluster);

91	92

92 // Depending on the traversal direction specified, finds the first or the la st leaf text node child that doesn't	93 // Depending on the traversal direction specified, finds the first or the la st leaf text node child that doesn't

93 // belong to any cluster.	94 // belong to any cluster.

94 static const RenderObject* findFirstTextLeafNotInCluster(const RenderObject* , size_t& depth, TraversalDirection);	95 static const RenderObject* findFirstTextLeafNotInCluster(const RenderObject* , size_t& depth, TraversalDirection);

95	96

96 // Returns groups of narrow descendants of a given autosizing cluster. The g roups are combined	97 // Returns groups of narrow descendants of a given autosizing cluster. The g roups are combined

97 // by the difference between the width of the descendant and the width of th e parent cluster's	98 // by the difference between the width of the descendant and the width of th e parent cluster's

98 // \|blockContainingAllText\|.	99 // \|blockContainingAllText\|.

99 static void getNarrowDescendantsGroupedByWidth(const TextAutosizingClusterIn fo& parentClusterInfo, Vector<Vector<TextAutosizingClusterInfo> >&);	100 static void getNarrowDescendantsGroupedByWidth(const TextAutosizingClusterIn fo& parentClusterInfo, Vector<Vector<TextAutosizingClusterInfo> >&);

100	101

101 Document* m_document;	102 Document* m_document;

102 };	103 };

103	104

104 } // namespace WebCore	105 } // namespace WebCore

105	106

106 #endif // TextAutosizer_h	107 #endif // TextAutosizer_h

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