/src/mozilla-central/dom/flex/FlexItem.cpp
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1 | | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
2 | | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
3 | | /* This Source Code Form is subject to the terms of the Mozilla Public |
4 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #include "FlexItem.h" |
8 | | |
9 | | #include "mozilla/dom/FlexBinding.h" |
10 | | #include "nsFlexContainerFrame.h" |
11 | | |
12 | | namespace mozilla { |
13 | | namespace dom { |
14 | | |
15 | | NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FlexItem, mParent) |
16 | | NS_IMPL_CYCLE_COLLECTING_ADDREF(FlexItem) |
17 | | NS_IMPL_CYCLE_COLLECTING_RELEASE(FlexItem) |
18 | 0 | NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FlexItem) |
19 | 0 | NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY |
20 | 0 | NS_INTERFACE_MAP_ENTRY(nsISupports) |
21 | 0 | NS_INTERFACE_MAP_END |
22 | | |
23 | | /** |
24 | | * Utility function to convert a nscoord size to CSS pixel values, with |
25 | | * graceful treatment of NS_UNCONSTRAINEDSIZE (which this function converts to |
26 | | * the double "positive infinity" value). |
27 | | * |
28 | | * This function is suitable for converting quantities that are expected to |
29 | | * sometimes legitimately (rather than arbitrarily/accidentally) contain the |
30 | | * sentinel value NS_UNCONSTRAINEDSIZE -- e.g. to handle "max-width: none". |
31 | | */ |
32 | | static double |
33 | | ToPossiblyUnconstrainedPixels(nscoord aSize) |
34 | 0 | { |
35 | 0 | if (aSize == NS_UNCONSTRAINEDSIZE) { |
36 | 0 | return std::numeric_limits<double>::infinity(); |
37 | 0 | } |
38 | 0 | return nsPresContext::AppUnitsToDoubleCSSPixels(aSize); |
39 | 0 | } |
40 | | |
41 | | FlexItem::FlexItem(FlexLine* aParent, |
42 | | const ComputedFlexItemInfo* aItem) |
43 | | : mParent(aParent) |
44 | 0 | { |
45 | 0 | MOZ_ASSERT(aItem, |
46 | 0 | "Should never be instantiated with a null ComputedFlexLineInfo."); |
47 | 0 |
|
48 | 0 | // Eagerly copy values from aItem, because we're not |
49 | 0 | // going to keep it around. |
50 | 0 | mNode = aItem->mNode; |
51 | 0 |
|
52 | 0 | // Convert app unit sizes to css pixel sizes. |
53 | 0 | mMainBaseSize = nsPresContext::AppUnitsToDoubleCSSPixels( |
54 | 0 | aItem->mMainBaseSize); |
55 | 0 | mMainDeltaSize = nsPresContext::AppUnitsToDoubleCSSPixels( |
56 | 0 | aItem->mMainDeltaSize); |
57 | 0 | mMainMinSize = nsPresContext::AppUnitsToDoubleCSSPixels( |
58 | 0 | aItem->mMainMinSize); |
59 | 0 | mMainMaxSize = ToPossiblyUnconstrainedPixels(aItem->mMainMaxSize); |
60 | 0 | mCrossMinSize = nsPresContext::AppUnitsToDoubleCSSPixels( |
61 | 0 | aItem->mCrossMinSize); |
62 | 0 | mCrossMaxSize = ToPossiblyUnconstrainedPixels(aItem->mCrossMaxSize); |
63 | 0 | } |
64 | | |
65 | | JSObject* |
66 | | FlexItem::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) |
67 | 0 | { |
68 | 0 | return FlexItem_Binding::Wrap(aCx, this, aGivenProto); |
69 | 0 | } |
70 | | |
71 | | nsINode* |
72 | | FlexItem::GetNode() const |
73 | 0 | { |
74 | 0 | return mNode; |
75 | 0 | } |
76 | | |
77 | | double |
78 | | FlexItem::MainBaseSize() const |
79 | 0 | { |
80 | 0 | return mMainBaseSize; |
81 | 0 | } |
82 | | |
83 | | double |
84 | | FlexItem::MainDeltaSize() const |
85 | 0 | { |
86 | 0 | return mMainDeltaSize; |
87 | 0 | } |
88 | | |
89 | | double |
90 | | FlexItem::MainMinSize() const |
91 | 0 | { |
92 | 0 | return mMainMinSize; |
93 | 0 | } |
94 | | |
95 | | double |
96 | | FlexItem::MainMaxSize() const |
97 | 0 | { |
98 | 0 | return mMainMaxSize; |
99 | 0 | } |
100 | | |
101 | | double |
102 | | FlexItem::CrossMinSize() const |
103 | 0 | { |
104 | 0 | return mCrossMinSize; |
105 | 0 | } |
106 | | |
107 | | double |
108 | | FlexItem::CrossMaxSize() const |
109 | 0 | { |
110 | 0 | return mCrossMaxSize; |
111 | 0 | } |
112 | | |
113 | | } // namespace dom |
114 | | } // namespace mozilla |