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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "mozilla/PresShell.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/HTMLMeterElement.h"
#include "nsIContent.h"
#include "nsLayoutUtils.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsFontMetrics.h"
#include <algorithm>
using namespace mozilla;
using mozilla::dom::Document;
using mozilla::dom::Element;
using mozilla::dom::HTMLMeterElement;
nsIFrame* NS_NewMeterFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell) nsMeterFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsMeterFrame)
nsMeterFrame::nsMeterFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID), mBarDiv(nullptr) {}
nsMeterFrame::~nsMeterFrame() = default;
void nsMeterFrame::Destroy(DestroyContext& aContext) {
NS_ASSERTION(!GetPrevContinuation(),
"nsMeterFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
aContext.AddAnonymousContent(mBarDiv.forget());
nsContainerFrame::Destroy(aContext);
}
nsresult nsMeterFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
// Get the NodeInfoManager and tag necessary to create the meter bar div.
nsCOMPtr<Document> doc = mContent->GetComposedDoc();
// Create the div.
mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
// Associate the right pseudo-element to the anonymous child.
if (StaticPrefs::layout_css_modern_range_pseudos_enabled()) {
// TODO(emilio): Create also a slider-track pseudo-element.
mBarDiv->SetPseudoElementType(PseudoStyleType::sliderFill);
} else {
mBarDiv->SetPseudoElementType(PseudoStyleType::mozMeterBar);
}
aElements.AppendElement(mBarDiv);
return NS_OK;
}
void nsMeterFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) {
if (mBarDiv) {
aElements.AppendElement(mBarDiv);
}
}
NS_QUERYFRAME_HEAD(nsMeterFrame)
NS_QUERYFRAME_ENTRY(nsMeterFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
void nsMeterFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsMeterFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
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.");
nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
ReflowBarFrame(barFrame, aPresContext, aReflowInput, aStatus);
const auto wm = aReflowInput.GetWritingMode();
aDesiredSize.SetSize(wm, aReflowInput.ComputedSizeWithBorderPadding(wm));
aDesiredSize.SetOverflowAreasToDesiredBounds();
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
FinishAndStoreOverflow(&aDesiredSize);
aStatus.Reset(); // This type of frame can't be split.
}
void nsMeterFrame::ReflowBarFrame(nsIFrame* aBarFrame,
nsPresContext* aPresContext,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
bool vertical = ResolvedOrientationIsVertical();
WritingMode wm = aBarFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.ComputedSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput reflowInput(aPresContext, aReflowInput, aBarFrame, availSize);
nscoord size =
vertical ? aReflowInput.ComputedHeight() : aReflowInput.ComputedWidth();
nscoord xoffset = aReflowInput.ComputedPhysicalBorderPadding().left;
nscoord yoffset = aReflowInput.ComputedPhysicalBorderPadding().top;
auto* meterElement = static_cast<HTMLMeterElement*>(GetContent());
size = NSToCoordRound(size * meterElement->Position());
if (!vertical && wm.IsPhysicalRTL()) {
xoffset += aReflowInput.ComputedWidth() - size;
}
// The bar position is *always* constrained.
if (vertical) {
// We want the bar to begin at the bottom.
yoffset += aReflowInput.ComputedHeight() - size;
size -= reflowInput.ComputedPhysicalMargin().TopBottom() +
reflowInput.ComputedPhysicalBorderPadding().TopBottom();
size = std::max(size, 0);
reflowInput.SetComputedHeight(size);
} else {
size -= reflowInput.ComputedPhysicalMargin().LeftRight() +
reflowInput.ComputedPhysicalBorderPadding().LeftRight();
size = std::max(size, 0);
reflowInput.SetComputedWidth(size);
}
xoffset += reflowInput.ComputedPhysicalMargin().left;
yoffset += reflowInput.ComputedPhysicalMargin().top;
ReflowOutput barDesiredSize(reflowInput);
ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowInput, xoffset,
yoffset, ReflowChildFlags::Default, aStatus);
FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowInput,
xoffset, yoffset, ReflowChildFlags::Default);
}
nsresult nsMeterFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* 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!");
PresShell()->FrameNeedsReflow(barFrame, IntrinsicDirty::None,
NS_FRAME_IS_DIRTY);
InvalidateFrame();
}
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
LogicalSize nsMeterFrame::ComputeAutoSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
ComputeSizeFlags aFlags) {
RefPtr<nsFontMetrics> fontMet =
nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
const WritingMode wm = GetWritingMode();
LogicalSize autoSize(wm);
autoSize.BSize(wm) = autoSize.ISize(wm) =
fontMet->Font().size.ToAppUnits(); // 1em
if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
autoSize.ISize(wm) *= 5; // 5em
} else {
autoSize.BSize(wm) *= 5; // 5em
}
return autoSize.ConvertTo(aWM, wm);
}
nscoord nsMeterFrame::GetMinISize(gfxContext* aRenderingContext) {
RefPtr<nsFontMetrics> fontMet =
nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
nscoord minISize = fontMet->Font().size.ToAppUnits(); // 1em
if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
// The orientation is inline
minISize *= 5; // 5em
}
return minISize;
}
nscoord nsMeterFrame::GetPrefISize(gfxContext* aRenderingContext) {
return GetMinISize(aRenderingContext);
}
bool nsMeterFrame::ShouldUseNativeStyle() const {
nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
// 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()->EffectiveAppearance() == StyleAppearance::Meter &&
!Style()->HasAuthorSpecifiedBorderOrBackground() && barFrame &&
barFrame->StyleDisplay()->EffectiveAppearance() ==
StyleAppearance::Meterchunk &&
!barFrame->Style()->HasAuthorSpecifiedBorderOrBackground();
}
|
