1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsSelectsAreaFrame.h"
#include "nsIContent.h"
#include "nsListControlFrame.h"
#include "nsDisplayList.h"
#include "WritingModes.h"
using namespace mozilla;
nsContainerFrame*
NS_NewSelectsAreaFrame(nsIPresShell* aShell, nsStyleContext* aContext, nsFrameState aFlags)
{
nsSelectsAreaFrame* it = new (aShell) nsSelectsAreaFrame(aContext);
// We need NS_BLOCK_FLOAT_MGR to ensure that the options inside the select
// aren't expanded by right floats outside the select.
it->AddStateBits(aFlags | NS_BLOCK_FLOAT_MGR);
return it;
}
NS_IMPL_FRAMEARENA_HELPERS(nsSelectsAreaFrame)
//---------------------------------------------------------
/**
* This wrapper class lets us redirect mouse hits from the child frame of
* an option element to the element's own frame.
* REVIEW: This is what nsSelectsAreaFrame::GetFrameForPoint used to do
*/
class nsDisplayOptionEventGrabber : public nsDisplayWrapList {
public:
nsDisplayOptionEventGrabber(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame, nsDisplayItem* aItem)
: nsDisplayWrapList(aBuilder, aFrame, aItem) {}
nsDisplayOptionEventGrabber(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame, nsDisplayList* aList)
: nsDisplayWrapList(aBuilder, aFrame, aList) {}
virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) override;
virtual bool ShouldFlattenAway(nsDisplayListBuilder* aBuilder) override {
return false;
}
NS_DISPLAY_DECL_NAME("OptionEventGrabber", TYPE_OPTION_EVENT_GRABBER)
};
void nsDisplayOptionEventGrabber::HitTest(nsDisplayListBuilder* aBuilder,
const nsRect& aRect, HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
nsTArray<nsIFrame*> outFrames;
mList.HitTest(aBuilder, aRect, aState, &outFrames);
for (uint32_t i = 0; i < outFrames.Length(); i++) {
nsIFrame* selectedFrame = outFrames.ElementAt(i);
while (selectedFrame &&
!(selectedFrame->GetContent() &&
selectedFrame->GetContent()->IsHTMLElement(nsGkAtoms::option))) {
selectedFrame = selectedFrame->GetParent();
}
if (selectedFrame) {
aOutFrames->AppendElement(selectedFrame);
} else {
// keep the original result, which could be this frame
aOutFrames->AppendElement(outFrames.ElementAt(i));
}
}
}
class nsOptionEventGrabberWrapper : public nsDisplayWrapper
{
public:
nsOptionEventGrabberWrapper() {}
virtual nsDisplayItem* WrapList(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame, nsDisplayList* aList) {
return new (aBuilder) nsDisplayOptionEventGrabber(aBuilder, aFrame, aList);
}
virtual nsDisplayItem* WrapItem(nsDisplayListBuilder* aBuilder,
nsDisplayItem* aItem) {
return new (aBuilder) nsDisplayOptionEventGrabber(aBuilder, aItem->Frame(), aItem);
}
};
static nsListControlFrame* GetEnclosingListFrame(nsIFrame* aSelectsAreaFrame)
{
nsIFrame* frame = aSelectsAreaFrame->GetParent();
while (frame) {
if (frame->GetType() == nsGkAtoms::listControlFrame)
return static_cast<nsListControlFrame*>(frame);
frame = frame->GetParent();
}
return nullptr;
}
class nsDisplayListFocus : public nsDisplayItem {
public:
nsDisplayListFocus(nsDisplayListBuilder* aBuilder,
nsSelectsAreaFrame* aFrame) :
nsDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayListFocus);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayListFocus() {
MOZ_COUNT_DTOR(nsDisplayListFocus);
}
#endif
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) override {
*aSnap = false;
// override bounds because the list item focus ring may extend outside
// the nsSelectsAreaFrame
nsListControlFrame* listFrame = GetEnclosingListFrame(Frame());
return listFrame->GetVisualOverflowRectRelativeToSelf() +
listFrame->GetOffsetToCrossDoc(ReferenceFrame());
}
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) override {
nsListControlFrame* listFrame = GetEnclosingListFrame(Frame());
// listFrame must be non-null or we wouldn't get called.
listFrame->PaintFocus(aCtx->GetDrawTarget(),
aBuilder->ToReferenceFrame(listFrame));
}
NS_DISPLAY_DECL_NAME("ListFocus", TYPE_LIST_FOCUS)
};
void
nsSelectsAreaFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
if (!aBuilder->IsForEventDelivery()) {
BuildDisplayListInternal(aBuilder, aLists);
return;
}
nsDisplayListCollection set;
BuildDisplayListInternal(aBuilder, set);
nsOptionEventGrabberWrapper wrapper;
wrapper.WrapLists(aBuilder, this, set, aLists);
}
void
nsSelectsAreaFrame::BuildDisplayListInternal(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
nsBlockFrame::BuildDisplayList(aBuilder, aLists);
nsListControlFrame* listFrame = GetEnclosingListFrame(this);
if (listFrame && listFrame->IsFocused()) {
// we can't just associate the display item with the list frame,
// because then the list's scrollframe won't clip it (the scrollframe
// only clips contained descendants).
aLists.Outlines()->AppendNewToTop(new (aBuilder)
nsDisplayListFocus(aBuilder, this));
}
}
void
nsSelectsAreaFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus)
{
nsListControlFrame* list = GetEnclosingListFrame(this);
NS_ASSERTION(list,
"Must have an nsListControlFrame! Frame constructor is "
"broken");
bool isInDropdownMode = list->IsInDropDownMode();
// See similar logic in nsListControlFrame::Reflow and
// nsListControlFrame::ReflowAsDropdown. We need to match it here.
WritingMode wm = aReflowInput.GetWritingMode();
nscoord oldBSize;
if (isInDropdownMode) {
// Store the block size now in case it changes during
// nsBlockFrame::Reflow for some odd reason.
if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
oldBSize = BSize(wm);
} else {
oldBSize = NS_UNCONSTRAINEDSIZE;
}
}
nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowInput, aStatus);
// Check whether we need to suppress scrollbar updates. We want to do
// that if we're in a possible first pass and our block size of a row
// has changed.
if (list->MightNeedSecondPass()) {
nscoord newBSizeOfARow = list->CalcBSizeOfARow();
// We'll need a second pass if our block size of a row changed. For
// comboboxes, we'll also need it if our block size changed. If
// we're going to do a second pass, suppress scrollbar updates for
// this pass.
if (newBSizeOfARow != mBSizeOfARow ||
(isInDropdownMode && (oldBSize != aDesiredSize.BSize(wm) ||
oldBSize != BSize(wm)))) {
mBSizeOfARow = newBSizeOfARow;
list->SetSuppressScrollbarUpdate(true);
}
}
}
|
