forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 2
/
nsMeterFrame.cpp
280 lines (229 loc) · 9.58 KB
/
nsMeterFrame.cpp
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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
/* -*- 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 "nsMeterFrame.h"
#include "nsIDOMHTMLMeterElement.h"
#include "nsIContent.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsINameSpaceManager.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsNodeInfoManager.h"
#include "nsINodeInfo.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentUtils.h"
#include "nsFormControlFrame.h"
#include "nsFontMetrics.h"
#include "nsContentList.h"
#include "mozilla/dom/Element.h"
#include "nsContentList.h"
#include <algorithm>
nsIFrame*
NS_NewMeterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMeterFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMeterFrame)
nsMeterFrame::nsMeterFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext)
, mBarDiv(nullptr)
{
}
nsMeterFrame::~nsMeterFrame()
{
}
void
nsMeterFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
NS_ASSERTION(!GetPrevContinuation(),
"nsMeterFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
nsContentUtils::DestroyAnonymousContent(&mBarDiv);
nsContainerFrame::DestroyFrom(aDestructRoot);
}
nsresult
nsMeterFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
// Get the NodeInfoManager and tag necessary to create the meter bar div.
nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
nsCOMPtr<nsINodeInfo> nodeInfo;
nodeInfo = doc->NodeInfoManager()->GetNodeInfo(nsGkAtoms::div, nullptr,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
// Create the div.
nsresult rv = NS_NewHTMLElement(getter_AddRefs(mBarDiv), nodeInfo.forget(),
mozilla::dom::NOT_FROM_PARSER);
NS_ENSURE_SUCCESS(rv, rv);
// Associate ::-moz-meter-bar pseudo-element to the anonymous child.
nsCSSPseudoElements::Type pseudoType = nsCSSPseudoElements::ePseudo_mozMeterBar;
nsRefPtr<nsStyleContext> newStyleContext = PresContext()->StyleSet()->
ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
StyleContext());
if (!aElements.AppendElement(ContentInfo(mBarDiv, newStyleContext))) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
void
nsMeterFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
uint32_t aFilter)
{
aElements.MaybeAppendElement(mBarDiv);
}
NS_QUERYFRAME_HEAD(nsMeterFrame)
NS_QUERYFRAME_ENTRY(nsMeterFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
NS_IMETHODIMP nsMeterFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsMeterFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
NS_ASSERTION(!GetPrevContinuation(),
"nsMeterFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
if (mState & NS_FRAME_FIRST_REFLOW) {
nsFormControlFrame::RegUnRegAccessKey(this, true);
}
nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
ReflowBarFrame(barFrame, aPresContext, aReflowState, aStatus);
aDesiredSize.width = aReflowState.ComputedWidth() +
aReflowState.mComputedBorderPadding.LeftRight();
aDesiredSize.height = aReflowState.ComputedHeight() +
aReflowState.mComputedBorderPadding.TopBottom();
aDesiredSize.SetOverflowAreasToDesiredBounds();
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
FinishAndStoreOverflow(&aDesiredSize);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
void
nsMeterFrame::ReflowBarFrame(nsIFrame* aBarFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
bool vertical = StyleDisplay()->mOrient == NS_STYLE_ORIENT_VERTICAL;
nsHTMLReflowState reflowState(aPresContext, aReflowState, aBarFrame,
nsSize(aReflowState.ComputedWidth(),
NS_UNCONSTRAINEDSIZE));
nscoord size = vertical ? aReflowState.ComputedHeight()
: aReflowState.ComputedWidth();
nscoord xoffset = aReflowState.mComputedBorderPadding.left;
nscoord yoffset = aReflowState.mComputedBorderPadding.top;
// NOTE: Introduce a new function getPosition in the content part ?
double position, max, min, value;
nsCOMPtr<nsIDOMHTMLMeterElement> meterElement =
do_QueryInterface(mContent);
meterElement->GetMax(&max);
meterElement->GetMin(&min);
meterElement->GetValue(&value);
position = max - min;
position = position != 0 ? (value - min) / position : 1;
size = NSToCoordRound(size * position);
if (!vertical && StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
xoffset += aReflowState.ComputedWidth() - size;
}
// The bar position is *always* constrained.
if (vertical) {
// We want the bar to begin at the bottom.
yoffset += aReflowState.ComputedHeight() - size;
size -= reflowState.mComputedMargin.TopBottom() +
reflowState.mComputedBorderPadding.TopBottom();
size = std::max(size, 0);
reflowState.SetComputedHeight(size);
} else {
size -= reflowState.mComputedMargin.LeftRight() +
reflowState.mComputedBorderPadding.LeftRight();
size = std::max(size, 0);
reflowState.SetComputedWidth(size);
}
xoffset += reflowState.mComputedMargin.left;
yoffset += reflowState.mComputedMargin.top;
nsHTMLReflowMetrics barDesiredSize;
ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
yoffset, 0, aStatus);
FinishReflowChild(aBarFrame, aPresContext, &reflowState, barDesiredSize,
xoffset, yoffset, 0);
}
NS_IMETHODIMP
nsMeterFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
if (aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::value ||
aAttribute == nsGkAtoms::max ||
aAttribute == nsGkAtoms::min )) {
nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
PresContext()->PresShell()->FrameNeedsReflow(barFrame,
nsIPresShell::eResize,
NS_FRAME_IS_DIRTY);
InvalidateFrame();
}
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
}
nsSize
nsMeterFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, bool aShrinkWrap)
{
nsRefPtr<nsFontMetrics> fontMet;
NS_ENSURE_SUCCESS(nsLayoutUtils::GetFontMetricsForFrame(this,
getter_AddRefs(fontMet)),
nsSize(0, 0));
nsSize autoSize;
autoSize.height = autoSize.width = fontMet->Font().size; // 1em
if (StyleDisplay()->mOrient == NS_STYLE_ORIENT_VERTICAL) {
autoSize.height *= 5; // 5em
} else {
autoSize.width *= 5; // 5em
}
return autoSize;
}
nscoord
nsMeterFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nsRefPtr<nsFontMetrics> fontMet;
NS_ENSURE_SUCCESS(
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet)), 0);
nscoord minWidth = fontMet->Font().size; // 1em
if (StyleDisplay()->mOrient == NS_STYLE_ORIENT_AUTO ||
StyleDisplay()->mOrient == NS_STYLE_ORIENT_HORIZONTAL) {
// The orientation is horizontal
minWidth *= 5; // 5em
}
return minWidth;
}
nscoord
nsMeterFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
return GetMinWidth(aRenderingContext);
}
bool
nsMeterFrame::ShouldUseNativeStyle() const
{
// Use the native style if these conditions are satisfied:
// - both frames use the native appearance;
// - neither frame has author specified rules setting the border or the
// background.
return StyleDisplay()->mAppearance == NS_THEME_METERBAR &&
mBarDiv->GetPrimaryFrame()->StyleDisplay()->mAppearance == NS_THEME_METERBAR_CHUNK &&
!PresContext()->HasAuthorSpecifiedRules(const_cast<nsMeterFrame*>(this),
NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND) &&
!PresContext()->HasAuthorSpecifiedRules(mBarDiv->GetPrimaryFrame(),
NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND);
}