The Tor Browser / file comparison
comparison: layout/xul/grid/nsGridRowLayout.cpp
layout/xul/grid/nsGridRowLayout.cpp
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
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| -1:000000000000 | 0:ddc086c598f5 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 // | |
| 7 // Eric Vaughan | |
| 8 // Netscape Communications | |
| 9 // | |
| 10 // See documentation in associated header file | |
| 11 // | |
| 12 | |
| 13 #include "nsGridRowLayout.h" | |
| 14 #include "nsBoxLayoutState.h" | |
| 15 #include "nsIScrollableFrame.h" | |
| 16 #include "nsBox.h" | |
| 17 #include "nsStackLayout.h" | |
| 18 #include "nsGrid.h" | |
| 19 | |
| 20 nsGridRowLayout::nsGridRowLayout():nsSprocketLayout() | |
| 21 { | |
| 22 } | |
| 23 | |
| 24 void | |
| 25 nsGridRowLayout::ChildrenInserted(nsIFrame* aBox, nsBoxLayoutState& aState, | |
| 26 nsIFrame* aPrevBox, | |
| 27 const nsFrameList::Slice& aNewChildren) | |
| 28 { | |
| 29 ChildAddedOrRemoved(aBox, aState); | |
| 30 } | |
| 31 | |
| 32 void | |
| 33 nsGridRowLayout::ChildrenAppended(nsIFrame* aBox, nsBoxLayoutState& aState, | |
| 34 const nsFrameList::Slice& aNewChildren) | |
| 35 { | |
| 36 ChildAddedOrRemoved(aBox, aState); | |
| 37 } | |
| 38 | |
| 39 void | |
| 40 nsGridRowLayout::ChildrenRemoved(nsIFrame* aBox, nsBoxLayoutState& aState, nsIFrame* aChildList) | |
| 41 { | |
| 42 ChildAddedOrRemoved(aBox, aState); | |
| 43 } | |
| 44 | |
| 45 void | |
| 46 nsGridRowLayout::ChildrenSet(nsIFrame* aBox, nsBoxLayoutState& aState, nsIFrame* aChildList) | |
| 47 { | |
| 48 ChildAddedOrRemoved(aBox, aState); | |
| 49 } | |
| 50 | |
| 51 nsIGridPart* | |
| 52 nsGridRowLayout::GetParentGridPart(nsIFrame* aBox, nsIFrame** aParentBox) | |
| 53 { | |
| 54 // go up and find our parent gridRow. Skip and non gridRow | |
| 55 // parents. | |
| 56 *aParentBox = nullptr; | |
| 57 | |
| 58 // walk up through any scrollboxes | |
| 59 aBox = nsGrid::GetScrollBox(aBox); | |
| 60 | |
| 61 // get the parent | |
| 62 if (aBox) | |
| 63 aBox = aBox->GetParentBox(); | |
| 64 | |
| 65 if (aBox) | |
| 66 { | |
| 67 nsIGridPart* parentGridRow = nsGrid::GetPartFromBox(aBox); | |
| 68 if (parentGridRow && parentGridRow->CanContain(this)) { | |
| 69 *aParentBox = aBox; | |
| 70 return parentGridRow; | |
| 71 } | |
| 72 } | |
| 73 | |
| 74 return nullptr; | |
| 75 } | |
| 76 | |
| 77 | |
| 78 nsGrid* | |
| 79 nsGridRowLayout::GetGrid(nsIFrame* aBox, int32_t* aIndex, nsGridRowLayout* aRequestor) | |
| 80 { | |
| 81 | |
| 82 if (aRequestor == nullptr) | |
| 83 { | |
| 84 nsIFrame* parentBox; // nsIFrame is implemented by nsIFrame and is not refcounted. | |
| 85 nsIGridPart* parent = GetParentGridPart(aBox, &parentBox); | |
| 86 if (parent) | |
| 87 return parent->GetGrid(parentBox, aIndex, this); | |
| 88 return nullptr; | |
| 89 } | |
| 90 | |
| 91 int32_t index = -1; | |
| 92 nsIFrame* child = aBox->GetChildBox(); | |
| 93 int32_t count = 0; | |
| 94 while(child) | |
| 95 { | |
| 96 // if there is a scrollframe walk inside it to its child | |
| 97 nsIFrame* childBox = nsGrid::GetScrolledBox(child); | |
| 98 | |
| 99 nsBoxLayout* layout = childBox->GetLayoutManager(); | |
| 100 nsIGridPart* gridRow = nsGrid::GetPartFromBox(childBox); | |
| 101 if (gridRow) | |
| 102 { | |
| 103 if (layout == aRequestor) { | |
| 104 index = count; | |
| 105 break; | |
| 106 } | |
| 107 count += gridRow->GetRowCount(); | |
| 108 } else | |
| 109 count++; | |
| 110 | |
| 111 child = child->GetNextBox(); | |
| 112 } | |
| 113 | |
| 114 // if we didn't find ourselves then the tree isn't properly formed yet | |
| 115 // this could happen during initial construction so lets just | |
| 116 // fail. | |
| 117 if (index == -1) { | |
| 118 *aIndex = -1; | |
| 119 return nullptr; | |
| 120 } | |
| 121 | |
| 122 (*aIndex) += index; | |
| 123 | |
| 124 nsIFrame* parentBox; // nsIFrame is implemented by nsIFrame and is not refcounted. | |
| 125 nsIGridPart* parent = GetParentGridPart(aBox, &parentBox); | |
| 126 if (parent) | |
| 127 return parent->GetGrid(parentBox, aIndex, this); | |
| 128 | |
| 129 return nullptr; | |
| 130 } | |
| 131 | |
| 132 nsMargin | |
| 133 nsGridRowLayout::GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal) | |
| 134 { | |
| 135 // get our parents margin | |
| 136 nsMargin margin(0,0,0,0); | |
| 137 nsIFrame* parent = nullptr; | |
| 138 nsIGridPart* part = GetParentGridPart(aBox, &parent); | |
| 139 if (part && parent) { | |
| 140 // if we are the first or last child walk upward and add margins. | |
| 141 | |
| 142 // make sure we check for a scrollbox | |
| 143 aBox = nsGrid::GetScrollBox(aBox); | |
| 144 | |
| 145 // see if we have a next to see if we are last | |
| 146 nsIFrame* next = aBox->GetNextBox(); | |
| 147 | |
| 148 // get the parent first child to see if we are first | |
| 149 nsIFrame* child = parent->GetChildBox(); | |
| 150 | |
| 151 margin = part->GetTotalMargin(parent, aIsHorizontal); | |
| 152 | |
| 153 // if first or last | |
| 154 if (child == aBox || next == nullptr) { | |
| 155 | |
| 156 // if it's not the first child remove the top margin | |
| 157 // we don't need it. | |
| 158 if (child != aBox) | |
| 159 { | |
| 160 if (aIsHorizontal) | |
| 161 margin.top = 0; | |
| 162 else | |
| 163 margin.left = 0; | |
| 164 } | |
| 165 | |
| 166 // if it's not the last child remove the bottom margin | |
| 167 // we don't need it. | |
| 168 if (next != nullptr) | |
| 169 { | |
| 170 if (aIsHorizontal) | |
| 171 margin.bottom = 0; | |
| 172 else | |
| 173 margin.right = 0; | |
| 174 } | |
| 175 | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 // add ours to it. | |
| 180 nsMargin ourMargin; | |
| 181 aBox->GetMargin(ourMargin); | |
| 182 margin += ourMargin; | |
| 183 | |
| 184 return margin; | |
| 185 } | |
| 186 | |
| 187 NS_IMPL_ADDREF_INHERITED(nsGridRowLayout, nsBoxLayout) | |
| 188 NS_IMPL_RELEASE_INHERITED(nsGridRowLayout, nsBoxLayout) | |
| 189 | |
| 190 NS_INTERFACE_MAP_BEGIN(nsGridRowLayout) | |
| 191 NS_INTERFACE_MAP_ENTRY(nsIGridPart) | |
| 192 NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIGridPart) | |
| 193 NS_INTERFACE_MAP_END_INHERITING(nsBoxLayout) |
