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
14 /*
15 * The nsGridRowGroupLayout implements the <rows> or <columns> tag in a grid.
16 */
17
18 #include "nsGridRowGroupLayout.h"
19 #include "nsCOMPtr.h"
20 #include "nsIScrollableFrame.h"
21 #include "nsBox.h"
22 #include "nsBoxLayoutState.h"
23 #include "nsGridLayout2.h"
24 #include "nsGridRow.h"
25 #include "mozilla/ReflowInput.h"
26
NS_NewGridRowGroupLayout()27 already_AddRefed<nsBoxLayout> NS_NewGridRowGroupLayout()
28 {
29 RefPtr<nsBoxLayout> layout = new nsGridRowGroupLayout();
30 return layout.forget();
31 }
32
nsGridRowGroupLayout()33 nsGridRowGroupLayout::nsGridRowGroupLayout():nsGridRowLayout(), mRowCount(0)
34 {
35 }
36
~nsGridRowGroupLayout()37 nsGridRowGroupLayout::~nsGridRowGroupLayout()
38 {
39 }
40
41 void
ChildAddedOrRemoved(nsIFrame * aBox,nsBoxLayoutState & aState)42 nsGridRowGroupLayout::ChildAddedOrRemoved(nsIFrame* aBox, nsBoxLayoutState& aState)
43 {
44 int32_t index = 0;
45 nsGrid* grid = GetGrid(aBox, &index);
46 bool isHorizontal = IsXULHorizontal(aBox);
47
48 if (grid)
49 grid->RowAddedOrRemoved(aState, index, isHorizontal);
50 }
51
52 void
AddWidth(nsSize & aSize,nscoord aSize2,bool aIsHorizontal)53 nsGridRowGroupLayout::AddWidth(nsSize& aSize, nscoord aSize2, bool aIsHorizontal)
54 {
55 nscoord& size = GET_WIDTH(aSize, aIsHorizontal);
56
57 if (size == NS_INTRINSICSIZE || aSize2 == NS_INTRINSICSIZE)
58 size = NS_INTRINSICSIZE;
59 else
60 size += aSize2;
61 }
62
63 nsSize
GetXULPrefSize(nsIFrame * aBox,nsBoxLayoutState & aState)64 nsGridRowGroupLayout::GetXULPrefSize(nsIFrame* aBox, nsBoxLayoutState& aState)
65 {
66 nsSize vpref = nsGridRowLayout::GetXULPrefSize(aBox, aState);
67
68
69 /* It is possible that we could have some extra columns. This is when less columns in XUL were
70 * defined that needed. And example might be a grid with 3 defined columns but a row with 4 cells in
71 * it. We would need an extra column to make the grid work. But because that extra column does not
72 * have a box associated with it we must add its size in manually. Remember we could have extra rows
73 * as well.
74 */
75
76 int32_t index = 0;
77 nsGrid* grid = GetGrid(aBox, &index);
78
79 if (grid)
80 {
81 // make sure we add in extra columns sizes as well
82 bool isHorizontal = IsXULHorizontal(aBox);
83 int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
84 int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
85 for (int32_t i=0; i < extraColumns; i++)
86 {
87 nscoord pref =
88 grid->GetPrefRowHeight(aState, i+start, !isHorizontal); // GetPrefColumnWidth
89
90 AddWidth(vpref, pref, isHorizontal);
91 }
92 }
93
94 return vpref;
95 }
96
97 nsSize
GetXULMaxSize(nsIFrame * aBox,nsBoxLayoutState & aState)98 nsGridRowGroupLayout::GetXULMaxSize(nsIFrame* aBox, nsBoxLayoutState& aState)
99 {
100 nsSize maxSize = nsGridRowLayout::GetXULMaxSize(aBox, aState);
101
102 int32_t index = 0;
103 nsGrid* grid = GetGrid(aBox, &index);
104
105 if (grid)
106 {
107 // make sure we add in extra columns sizes as well
108 bool isHorizontal = IsXULHorizontal(aBox);
109 int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
110 int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
111 for (int32_t i=0; i < extraColumns; i++)
112 {
113 nscoord max =
114 grid->GetMaxRowHeight(aState, i+start, !isHorizontal); // GetMaxColumnWidth
115
116 AddWidth(maxSize, max, isHorizontal);
117 }
118 }
119
120 return maxSize;
121 }
122
123 nsSize
GetXULMinSize(nsIFrame * aBox,nsBoxLayoutState & aState)124 nsGridRowGroupLayout::GetXULMinSize(nsIFrame* aBox, nsBoxLayoutState& aState)
125 {
126 nsSize minSize = nsGridRowLayout::GetXULMinSize(aBox, aState);
127
128 int32_t index = 0;
129 nsGrid* grid = GetGrid(aBox, &index);
130
131 if (grid)
132 {
133 // make sure we add in extra columns sizes as well
134 bool isHorizontal = IsXULHorizontal(aBox);
135 int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
136 int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
137 for (int32_t i=0; i < extraColumns; i++)
138 {
139 nscoord min =
140 grid->GetMinRowHeight(aState, i+start, !isHorizontal); // GetMinColumnWidth
141 AddWidth(minSize, min, isHorizontal);
142 }
143 }
144
145 return minSize;
146 }
147
148 /*
149 * Run down through our children dirtying them recursively.
150 */
151 void
DirtyRows(nsIFrame * aBox,nsBoxLayoutState & aState)152 nsGridRowGroupLayout::DirtyRows(nsIFrame* aBox, nsBoxLayoutState& aState)
153 {
154 if (aBox) {
155 // mark us dirty
156 // XXXldb We probably don't want to walk up the ancestor chain
157 // calling MarkIntrinsicISizesDirty for every row group.
158 aState.PresShell()->FrameNeedsReflow(aBox, nsIPresShell::eTreeChange,
159 NS_FRAME_IS_DIRTY);
160 nsIFrame* child = nsBox::GetChildXULBox(aBox);
161
162 while(child) {
163
164 // walk into scrollframes
165 nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
166
167 // walk into other monuments
168 nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
169 if (monument)
170 monument->DirtyRows(deepChild, aState);
171
172 child = nsBox::GetNextXULBox(child);
173 }
174 }
175 }
176
177
178 void
CountRowsColumns(nsIFrame * aBox,int32_t & aRowCount,int32_t & aComputedColumnCount)179 nsGridRowGroupLayout::CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount)
180 {
181 if (aBox) {
182 int32_t startCount = aRowCount;
183
184 nsIFrame* child = nsBox::GetChildXULBox(aBox);
185
186 while(child) {
187
188 // first see if it is a scrollframe. If so walk down into it and get the scrolled child
189 nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
190
191 nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
192 if (monument) {
193 monument->CountRowsColumns(deepChild, aRowCount, aComputedColumnCount);
194 child = nsBox::GetNextXULBox(child);
195 deepChild = child;
196 continue;
197 }
198
199 child = nsBox::GetNextXULBox(child);
200
201 // if not a monument. Then count it. It will be a bogus row
202 aRowCount++;
203 }
204
205 mRowCount = aRowCount - startCount;
206 }
207 }
208
209
210 /**
211 * Fill out the given row structure recursively
212 */
213 int32_t
BuildRows(nsIFrame * aBox,nsGridRow * aRows)214 nsGridRowGroupLayout::BuildRows(nsIFrame* aBox, nsGridRow* aRows)
215 {
216 int32_t rowCount = 0;
217
218 if (aBox) {
219 nsIFrame* child = nsBox::GetChildXULBox(aBox);
220
221 while(child) {
222
223 // first see if it is a scrollframe. If so walk down into it and get the scrolled child
224 nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
225
226 nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
227 if (monument) {
228 rowCount += monument->BuildRows(deepChild, &aRows[rowCount]);
229 child = nsBox::GetNextXULBox(child);
230 deepChild = child;
231 continue;
232 }
233
234 aRows[rowCount].Init(child, true);
235
236 child = nsBox::GetNextXULBox(child);
237
238 // if not a monument. Then count it. It will be a bogus row
239 rowCount++;
240 }
241 }
242
243 return rowCount;
244 }
245
246 nsMargin
GetTotalMargin(nsIFrame * aBox,bool aIsHorizontal)247 nsGridRowGroupLayout::GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal)
248 {
249 // group have border and padding added to the total margin
250
251 nsMargin margin = nsGridRowLayout::GetTotalMargin(aBox, aIsHorizontal);
252
253 // make sure we have the scrollframe on the outside if it has one.
254 // that's where the border is.
255 aBox = nsGrid::GetScrollBox(aBox);
256
257 // add our border/padding to it
258 nsMargin borderPadding(0,0,0,0);
259 aBox->GetXULBorderAndPadding(borderPadding);
260 margin += borderPadding;
261
262 return margin;
263 }
264
265
266