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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 |
(...skipping 10 matching lines...) Expand all Loading... |
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
24 */ | 24 */ |
25 | 25 |
26 #ifndef TextAutosizer_h | 26 #ifndef TextAutosizer_h |
27 #define TextAutosizer_h | 27 #define TextAutosizer_h |
28 | 28 |
29 #if ENABLE(TEXT_AUTOSIZING) | 29 #if ENABLE(TEXT_AUTOSIZING) |
30 | 30 |
31 #include "IntSize.h" | |
32 #include <wtf/Noncopyable.h> | 31 #include <wtf/Noncopyable.h> |
33 #include <wtf/PassOwnPtr.h> | 32 #include <wtf/PassOwnPtr.h> |
34 #include <wtf/PassRefPtr.h> | |
35 | 33 |
36 namespace WebCore { | 34 namespace WebCore { |
37 | 35 |
38 class Document; | 36 class Document; |
39 class RenderBlock; | 37 class RenderBlock; |
40 class RenderObject; | 38 class RenderObject; |
41 class RenderStyle; | |
42 class RenderText; | 39 class RenderText; |
43 struct TextAutosizingWindowInfo; | 40 struct TextAutosizingWindowInfo; |
44 | 41 |
45 class TextAutosizer { | 42 class TextAutosizer { |
46 WTF_MAKE_NONCOPYABLE(TextAutosizer); | 43 WTF_MAKE_NONCOPYABLE(TextAutosizer); |
47 | 44 |
48 public: | 45 public: |
49 static PassOwnPtr<TextAutosizer> create(Document* document) { return adoptPt
r(new TextAutosizer(document)); } | 46 static PassOwnPtr<TextAutosizer> create(Document* document) { return adoptPt
r(new TextAutosizer(document)); } |
50 | 47 |
51 virtual ~TextAutosizer(); | 48 virtual ~TextAutosizer(); |
52 | 49 |
53 bool processSubtree(RenderObject* layoutRoot); | 50 bool processSubtree(RenderObject* layoutRoot); |
54 | 51 |
55 static float computeAutosizedFontSize(float specifiedSize, float multiplier)
; | 52 static float computeAutosizedFontSize(float specifiedSize, float multiplier)
; |
56 | 53 |
57 private: | 54 private: |
58 enum TraversalDirection { | 55 enum TraversalDirection { |
59 FirstToLast, | 56 FirstToLast, |
60 LastToFirst | 57 LastToFirst |
61 }; | 58 }; |
62 | 59 |
63 explicit TextAutosizer(Document*); | 60 explicit TextAutosizer(Document*); |
64 | 61 |
65 void processCluster(RenderBlock* cluster, RenderBlock* container, RenderObje
ct* subtreeRoot, const TextAutosizingWindowInfo&); | 62 void processCluster(RenderBlock* cluster, RenderBlock* container, RenderObje
ct* subtreeRoot, const TextAutosizingWindowInfo&); |
66 void processContainer(float multiplier, RenderBlock* container, RenderObject
* subtreeRoot, const TextAutosizingWindowInfo&); | 63 void processContainer(float multiplier, RenderBlock* container, const Render
Block* blockContainingAllText, RenderObject* subtreeRoot, const TextAutosizingWi
ndowInfo&); |
67 | 64 |
68 void setMultiplier(RenderObject*, float); | 65 void setMultiplier(RenderObject*, float); |
69 | 66 |
70 static bool isAutosizingContainer(const RenderObject*); | 67 static bool isAutosizingContainer(const RenderObject*); |
71 static bool isAutosizingCluster(const RenderBlock*); | 68 static bool isAutosizingCluster(const RenderBlock*, const RenderBlock* paren
tBlockContainingAllText); |
| 69 static bool isAutosizingCluster(const RenderObject*); |
72 | 70 |
73 static bool containerShouldbeAutosized(const RenderBlock* container); | 71 static bool containerShouldBeAutosized(const RenderBlock* container); |
74 static bool clusterShouldBeAutosized(const RenderBlock* lowestCommonAncestor
, float commonAncestorWidth); | 72 static bool clusterShouldBeAutosized(const RenderBlock* blockContainingAllTe
xt, float blockWidth); |
75 static void measureDescendantTextWidth(const RenderBlock* container, float m
inTextWidth, float& textWidth); | 73 static void measureDescendantTextWidth(const RenderBlock* container, const R
enderBlock* blockContainingAllText, float minTextWidth, float& textWidth); |
76 | 74 |
77 // Use to traverse the tree of descendants, excluding descendants of contain
ers (but returning the containers themselves). | 75 // Use to traverse the tree of descendants, excluding descendants of contain
ers (but returning the containers themselves). |
78 static RenderObject* nextInPreOrderSkippingDescendantsOfContainers(const Ren
derObject* current, const RenderObject* stayWithin); | 76 static RenderObject* nextInPreOrderSkippingDescendantsOfContainers(const Ren
derObject*, const RenderObject* stayWithin); |
79 | 77 |
80 // Finds the lowest common ancestor of the first and the last descendant | |
81 // text node (excluding those belonging to other autosizing clusters). | |
82 static const RenderBlock* findDeepestBlockContainingAllText(const RenderBloc
k* cluster); | 78 static const RenderBlock* findDeepestBlockContainingAllText(const RenderBloc
k* cluster); |
83 | 79 |
84 // Depending on the traversal direction specified, finds the first or the la
st leaf text node child that doesn't | 80 // Depending on the traversal direction specified, finds the first or the la
st leaf text node child that doesn't |
85 // belong to any cluster. | 81 // belong to any cluster. |
86 static const RenderObject* findFirstTextLeafNotInCluster(const RenderObject*
, size_t& depth, TraversalDirection); | 82 static const RenderObject* findFirstTextLeafNotInCluster(const RenderObject*
, size_t& depth, TraversalDirection); |
87 | 83 |
88 Document* m_document; | 84 Document* m_document; |
89 }; | 85 }; |
90 | 86 |
91 } // namespace WebCore | 87 } // namespace WebCore |
92 | 88 |
93 #endif // ENABLE(TEXT_AUTOSIZING) | 89 #endif // ENABLE(TEXT_AUTOSIZING) |
94 | 90 |
95 #endif // TextAutosizer_h | 91 #endif // TextAutosizer_h |
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