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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 :
27 0 : already_AddRefed<nsBoxLayout> NS_NewGridRowGroupLayout()
28 : {
29 0 : RefPtr<nsBoxLayout> layout = new nsGridRowGroupLayout();
30 0 : return layout.forget();
31 : }
32 :
33 0 : nsGridRowGroupLayout::nsGridRowGroupLayout():nsGridRowLayout(), mRowCount(0)
34 : {
35 0 : }
36 :
37 0 : nsGridRowGroupLayout::~nsGridRowGroupLayout()
38 : {
39 0 : }
40 :
41 : void
42 0 : nsGridRowGroupLayout::ChildAddedOrRemoved(nsIFrame* aBox, nsBoxLayoutState& aState)
43 : {
44 0 : int32_t index = 0;
45 0 : nsGrid* grid = GetGrid(aBox, &index);
46 0 : bool isHorizontal = IsXULHorizontal(aBox);
47 :
48 0 : if (grid)
49 0 : grid->RowAddedOrRemoved(aState, index, isHorizontal);
50 0 : }
51 :
52 : void
53 0 : nsGridRowGroupLayout::AddWidth(nsSize& aSize, nscoord aSize2, bool aIsHorizontal)
54 : {
55 0 : nscoord& size = GET_WIDTH(aSize, aIsHorizontal);
56 :
57 0 : if (size == NS_INTRINSICSIZE || aSize2 == NS_INTRINSICSIZE)
58 0 : size = NS_INTRINSICSIZE;
59 : else
60 0 : size += aSize2;
61 0 : }
62 :
63 : nsSize
64 0 : nsGridRowGroupLayout::GetXULPrefSize(nsIFrame* aBox, nsBoxLayoutState& aState)
65 : {
66 0 : 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 0 : int32_t index = 0;
77 0 : nsGrid* grid = GetGrid(aBox, &index);
78 :
79 0 : if (grid)
80 : {
81 : // make sure we add in extra columns sizes as well
82 0 : bool isHorizontal = IsXULHorizontal(aBox);
83 0 : int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
84 0 : int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
85 0 : for (int32_t i=0; i < extraColumns; i++)
86 : {
87 : nscoord pref =
88 0 : grid->GetPrefRowHeight(aState, i+start, !isHorizontal); // GetPrefColumnWidth
89 :
90 0 : AddWidth(vpref, pref, isHorizontal);
91 : }
92 : }
93 :
94 0 : return vpref;
95 : }
96 :
97 : nsSize
98 0 : nsGridRowGroupLayout::GetXULMaxSize(nsIFrame* aBox, nsBoxLayoutState& aState)
99 : {
100 0 : nsSize maxSize = nsGridRowLayout::GetXULMaxSize(aBox, aState);
101 :
102 0 : int32_t index = 0;
103 0 : nsGrid* grid = GetGrid(aBox, &index);
104 :
105 0 : if (grid)
106 : {
107 : // make sure we add in extra columns sizes as well
108 0 : bool isHorizontal = IsXULHorizontal(aBox);
109 0 : int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
110 0 : int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
111 0 : for (int32_t i=0; i < extraColumns; i++)
112 : {
113 : nscoord max =
114 0 : grid->GetMaxRowHeight(aState, i+start, !isHorizontal); // GetMaxColumnWidth
115 :
116 0 : AddWidth(maxSize, max, isHorizontal);
117 : }
118 : }
119 :
120 0 : return maxSize;
121 : }
122 :
123 : nsSize
124 0 : nsGridRowGroupLayout::GetXULMinSize(nsIFrame* aBox, nsBoxLayoutState& aState)
125 : {
126 0 : nsSize minSize = nsGridRowLayout::GetXULMinSize(aBox, aState);
127 :
128 0 : int32_t index = 0;
129 0 : nsGrid* grid = GetGrid(aBox, &index);
130 :
131 0 : if (grid)
132 : {
133 : // make sure we add in extra columns sizes as well
134 0 : bool isHorizontal = IsXULHorizontal(aBox);
135 0 : int32_t extraColumns = grid->GetExtraColumnCount(isHorizontal);
136 0 : int32_t start = grid->GetColumnCount(isHorizontal) - grid->GetExtraColumnCount(isHorizontal);
137 0 : for (int32_t i=0; i < extraColumns; i++)
138 : {
139 : nscoord min =
140 0 : grid->GetMinRowHeight(aState, i+start, !isHorizontal); // GetMinColumnWidth
141 0 : AddWidth(minSize, min, isHorizontal);
142 : }
143 : }
144 :
145 0 : return minSize;
146 : }
147 :
148 : /*
149 : * Run down through our children dirtying them recursively.
150 : */
151 : void
152 0 : nsGridRowGroupLayout::DirtyRows(nsIFrame* aBox, nsBoxLayoutState& aState)
153 : {
154 0 : 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 0 : aState.PresShell()->FrameNeedsReflow(aBox, nsIPresShell::eTreeChange,
159 0 : NS_FRAME_IS_DIRTY);
160 0 : nsIFrame* child = nsBox::GetChildXULBox(aBox);
161 :
162 0 : while(child) {
163 :
164 : // walk into scrollframes
165 0 : nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
166 :
167 : // walk into other monuments
168 0 : nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
169 0 : if (monument)
170 0 : monument->DirtyRows(deepChild, aState);
171 :
172 0 : child = nsBox::GetNextXULBox(child);
173 : }
174 : }
175 0 : }
176 :
177 :
178 : void
179 0 : nsGridRowGroupLayout::CountRowsColumns(nsIFrame* aBox, int32_t& aRowCount, int32_t& aComputedColumnCount)
180 : {
181 0 : if (aBox) {
182 0 : int32_t startCount = aRowCount;
183 :
184 0 : nsIFrame* child = nsBox::GetChildXULBox(aBox);
185 :
186 0 : while(child) {
187 :
188 : // first see if it is a scrollframe. If so walk down into it and get the scrolled child
189 0 : nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
190 :
191 0 : nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
192 0 : if (monument) {
193 0 : monument->CountRowsColumns(deepChild, aRowCount, aComputedColumnCount);
194 0 : child = nsBox::GetNextXULBox(child);
195 0 : deepChild = child;
196 0 : continue;
197 : }
198 :
199 0 : child = nsBox::GetNextXULBox(child);
200 :
201 : // if not a monument. Then count it. It will be a bogus row
202 0 : aRowCount++;
203 : }
204 :
205 0 : mRowCount = aRowCount - startCount;
206 : }
207 0 : }
208 :
209 :
210 : /**
211 : * Fill out the given row structure recursively
212 : */
213 : int32_t
214 0 : nsGridRowGroupLayout::BuildRows(nsIFrame* aBox, nsGridRow* aRows)
215 : {
216 0 : int32_t rowCount = 0;
217 :
218 0 : if (aBox) {
219 0 : nsIFrame* child = nsBox::GetChildXULBox(aBox);
220 :
221 0 : while(child) {
222 :
223 : // first see if it is a scrollframe. If so walk down into it and get the scrolled child
224 0 : nsIFrame* deepChild = nsGrid::GetScrolledBox(child);
225 :
226 0 : nsIGridPart* monument = nsGrid::GetPartFromBox(deepChild);
227 0 : if (monument) {
228 0 : rowCount += monument->BuildRows(deepChild, &aRows[rowCount]);
229 0 : child = nsBox::GetNextXULBox(child);
230 0 : deepChild = child;
231 0 : continue;
232 : }
233 :
234 0 : aRows[rowCount].Init(child, true);
235 :
236 0 : child = nsBox::GetNextXULBox(child);
237 :
238 : // if not a monument. Then count it. It will be a bogus row
239 0 : rowCount++;
240 : }
241 : }
242 :
243 0 : return rowCount;
244 : }
245 :
246 : nsMargin
247 0 : nsGridRowGroupLayout::GetTotalMargin(nsIFrame* aBox, bool aIsHorizontal)
248 : {
249 : // group have border and padding added to the total margin
250 :
251 0 : 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 0 : aBox = nsGrid::GetScrollBox(aBox);
256 :
257 : // add our border/padding to it
258 0 : nsMargin borderPadding(0,0,0,0);
259 0 : aBox->GetXULBorderAndPadding(borderPadding);
260 0 : margin += borderPadding;
261 :
262 0 : return margin;
263 : }
264 :
265 :
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