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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 : #include "nsProgressFrame.h"
7 :
8 : #include "nsIContent.h"
9 : #include "nsPresContext.h"
10 : #include "nsGkAtoms.h"
11 : #include "nsNameSpaceManager.h"
12 : #include "nsIDocument.h"
13 : #include "nsIPresShell.h"
14 : #include "nsNodeInfoManager.h"
15 : #include "nsContentCreatorFunctions.h"
16 : #include "nsContentUtils.h"
17 : #include "nsFormControlFrame.h"
18 : #include "nsFontMetrics.h"
19 : #include "mozilla/dom/Element.h"
20 : #include "mozilla/dom/HTMLProgressElement.h"
21 : #include "nsContentList.h"
22 : #include "nsCSSPseudoElements.h"
23 : #include "nsStyleSet.h"
24 : #include "mozilla/StyleSetHandle.h"
25 : #include "mozilla/StyleSetHandleInlines.h"
26 : #include "nsThemeConstants.h"
27 : #include <algorithm>
28 :
29 : using namespace mozilla;
30 : using namespace mozilla::dom;
31 :
32 : nsIFrame*
33 0 : NS_NewProgressFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
34 : {
35 0 : return new (aPresShell) nsProgressFrame(aContext);
36 : }
37 :
38 0 : NS_IMPL_FRAMEARENA_HELPERS(nsProgressFrame)
39 :
40 0 : nsProgressFrame::nsProgressFrame(nsStyleContext* aContext)
41 : : nsContainerFrame(aContext, kClassID)
42 0 : , mBarDiv(nullptr)
43 : {
44 0 : }
45 :
46 0 : nsProgressFrame::~nsProgressFrame()
47 : {
48 0 : }
49 :
50 : void
51 0 : nsProgressFrame::DestroyFrom(nsIFrame* aDestructRoot)
52 : {
53 0 : NS_ASSERTION(!GetPrevContinuation(),
54 : "nsProgressFrame should not have continuations; if it does we "
55 : "need to call RegUnregAccessKey only for the first.");
56 0 : nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
57 0 : nsContentUtils::DestroyAnonymousContent(&mBarDiv);
58 0 : nsContainerFrame::DestroyFrom(aDestructRoot);
59 0 : }
60 :
61 : nsresult
62 0 : nsProgressFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
63 : {
64 : // Create the progress bar div.
65 0 : nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();
66 0 : mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
67 :
68 : // Associate ::-moz-progress-bar pseudo-element to the anonymous child.
69 0 : mBarDiv->SetPseudoElementType(CSSPseudoElementType::mozProgressBar);
70 :
71 0 : if (!aElements.AppendElement(mBarDiv)) {
72 0 : return NS_ERROR_OUT_OF_MEMORY;
73 : }
74 :
75 0 : return NS_OK;
76 : }
77 :
78 : void
79 0 : nsProgressFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
80 : uint32_t aFilter)
81 : {
82 0 : if (mBarDiv) {
83 0 : aElements.AppendElement(mBarDiv);
84 : }
85 0 : }
86 :
87 0 : NS_QUERYFRAME_HEAD(nsProgressFrame)
88 0 : NS_QUERYFRAME_ENTRY(nsProgressFrame)
89 0 : NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
90 0 : NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
91 :
92 :
93 : void
94 0 : nsProgressFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
95 : const nsRect& aDirtyRect,
96 : const nsDisplayListSet& aLists)
97 : {
98 0 : BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
99 0 : }
100 :
101 : void
102 0 : nsProgressFrame::Reflow(nsPresContext* aPresContext,
103 : ReflowOutput& aDesiredSize,
104 : const ReflowInput& aReflowInput,
105 : nsReflowStatus& aStatus)
106 : {
107 0 : MarkInReflow();
108 0 : DO_GLOBAL_REFLOW_COUNT("nsProgressFrame");
109 0 : DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
110 :
111 0 : NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
112 0 : NS_ASSERTION(PrincipalChildList().GetLength() == 1 &&
113 : PrincipalChildList().FirstChild() == mBarDiv->GetPrimaryFrame(),
114 : "unexpected child frames");
115 0 : NS_ASSERTION(!GetPrevContinuation(),
116 : "nsProgressFrame should not have continuations; if it does we "
117 : "need to call RegUnregAccessKey only for the first.");
118 :
119 0 : if (mState & NS_FRAME_FIRST_REFLOW) {
120 0 : nsFormControlFrame::RegUnRegAccessKey(this, true);
121 : }
122 :
123 0 : aDesiredSize.SetSize(aReflowInput.GetWritingMode(),
124 0 : aReflowInput.ComputedSizeWithBorderPadding());
125 0 : aDesiredSize.SetOverflowAreasToDesiredBounds();
126 :
127 0 : for (auto childFrame : PrincipalChildList()) {
128 0 : ReflowChildFrame(childFrame, aPresContext, aReflowInput, aStatus);
129 0 : ConsiderChildOverflow(aDesiredSize.mOverflowAreas, childFrame);
130 : }
131 :
132 0 : FinishAndStoreOverflow(&aDesiredSize);
133 :
134 0 : aStatus.Reset();
135 :
136 0 : NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
137 0 : }
138 :
139 : void
140 0 : nsProgressFrame::ReflowChildFrame(nsIFrame* aChild,
141 : nsPresContext* aPresContext,
142 : const ReflowInput& aReflowInput,
143 : nsReflowStatus& aStatus)
144 : {
145 0 : bool vertical = ResolvedOrientationIsVertical();
146 0 : WritingMode wm = aChild->GetWritingMode();
147 0 : LogicalSize availSize = aReflowInput.ComputedSize(wm);
148 0 : availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
149 0 : ReflowInput reflowInput(aPresContext, aReflowInput, aChild, availSize);
150 0 : nscoord size = vertical ? aReflowInput.ComputedHeight()
151 0 : : aReflowInput.ComputedWidth();
152 0 : nscoord xoffset = aReflowInput.ComputedPhysicalBorderPadding().left;
153 0 : nscoord yoffset = aReflowInput.ComputedPhysicalBorderPadding().top;
154 :
155 0 : double position = static_cast<HTMLProgressElement*>(mContent)->Position();
156 :
157 : // Force the bar's size to match the current progress.
158 : // When indeterminate, the progress' size will be 100%.
159 0 : if (position >= 0.0) {
160 0 : size *= position;
161 : }
162 :
163 0 : if (!vertical && (wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR())) {
164 0 : xoffset += aReflowInput.ComputedWidth() - size;
165 : }
166 :
167 : // The bar size is fixed in these cases:
168 : // - the progress position is determined: the bar size is fixed according
169 : // to it's value.
170 : // - the progress position is indeterminate and the bar appearance should be
171 : // shown as native: the bar size is forced to 100%.
172 : // Otherwise (when the progress is indeterminate and the bar appearance isn't
173 : // native), the bar size isn't fixed and can be set by the author.
174 0 : if (position != -1 || ShouldUseNativeStyle()) {
175 0 : if (vertical) {
176 : // We want the bar to begin at the bottom.
177 0 : yoffset += aReflowInput.ComputedHeight() - size;
178 :
179 0 : size -= reflowInput.ComputedPhysicalMargin().TopBottom() +
180 0 : reflowInput.ComputedPhysicalBorderPadding().TopBottom();
181 0 : size = std::max(size, 0);
182 0 : reflowInput.SetComputedHeight(size);
183 : } else {
184 0 : size -= reflowInput.ComputedPhysicalMargin().LeftRight() +
185 0 : reflowInput.ComputedPhysicalBorderPadding().LeftRight();
186 0 : size = std::max(size, 0);
187 0 : reflowInput.SetComputedWidth(size);
188 : }
189 0 : } else if (vertical) {
190 : // For vertical progress bars, we need to position the bar specificly when
191 : // the width isn't constrained (position == -1 and !ShouldUseNativeStyle())
192 : // because aReflowInput.ComputedHeight() - size == 0.
193 0 : yoffset += aReflowInput.ComputedHeight() - reflowInput.ComputedHeight();
194 : }
195 :
196 0 : xoffset += reflowInput.ComputedPhysicalMargin().left;
197 0 : yoffset += reflowInput.ComputedPhysicalMargin().top;
198 :
199 0 : ReflowOutput barDesiredSize(aReflowInput);
200 0 : ReflowChild(aChild, aPresContext, barDesiredSize, reflowInput, xoffset,
201 0 : yoffset, 0, aStatus);
202 : FinishReflowChild(aChild, aPresContext, barDesiredSize, &reflowInput,
203 0 : xoffset, yoffset, 0);
204 0 : }
205 :
206 : nsresult
207 0 : nsProgressFrame::AttributeChanged(int32_t aNameSpaceID,
208 : nsIAtom* aAttribute,
209 : int32_t aModType)
210 : {
211 0 : NS_ASSERTION(mBarDiv, "Progress bar div must exist!");
212 :
213 0 : if (aNameSpaceID == kNameSpaceID_None &&
214 0 : (aAttribute == nsGkAtoms::value || aAttribute == nsGkAtoms::max)) {
215 0 : auto shell = PresContext()->PresShell();
216 0 : for (auto childFrame : PrincipalChildList()) {
217 : shell->FrameNeedsReflow(childFrame, nsIPresShell::eResize,
218 0 : NS_FRAME_IS_DIRTY);
219 : }
220 0 : InvalidateFrame();
221 : }
222 :
223 0 : return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
224 : }
225 :
226 : LogicalSize
227 0 : nsProgressFrame::ComputeAutoSize(gfxContext* aRenderingContext,
228 : WritingMode aWM,
229 : const LogicalSize& aCBSize,
230 : nscoord aAvailableISize,
231 : const LogicalSize& aMargin,
232 : const LogicalSize& aBorder,
233 : const LogicalSize& aPadding,
234 : ComputeSizeFlags aFlags)
235 : {
236 0 : const WritingMode wm = GetWritingMode();
237 0 : LogicalSize autoSize(wm);
238 0 : autoSize.BSize(wm) = autoSize.ISize(wm) =
239 0 : NSToCoordRound(StyleFont()->mFont.size *
240 0 : nsLayoutUtils::FontSizeInflationFor(this)); // 1em
241 :
242 0 : if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
243 0 : autoSize.ISize(wm) *= 10; // 10em
244 : } else {
245 0 : autoSize.BSize(wm) *= 10; // 10em
246 : }
247 :
248 0 : return autoSize.ConvertTo(aWM, wm);
249 : }
250 :
251 : nscoord
252 0 : nsProgressFrame::GetMinISize(gfxContext *aRenderingContext)
253 : {
254 : RefPtr<nsFontMetrics> fontMet =
255 0 : nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
256 :
257 0 : nscoord minISize = fontMet->Font().size; // 1em
258 :
259 0 : if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
260 : // The orientation is inline
261 0 : minISize *= 10; // 10em
262 : }
263 :
264 0 : return minISize;
265 : }
266 :
267 : nscoord
268 0 : nsProgressFrame::GetPrefISize(gfxContext *aRenderingContext)
269 : {
270 0 : return GetMinISize(aRenderingContext);
271 : }
272 :
273 : bool
274 0 : nsProgressFrame::ShouldUseNativeStyle() const
275 : {
276 0 : nsIFrame* barFrame = PrincipalChildList().FirstChild();
277 :
278 : // Use the native style if these conditions are satisfied:
279 : // - both frames use the native appearance;
280 : // - neither frame has author specified rules setting the border or the
281 : // background.
282 0 : return StyleDisplay()->mAppearance == NS_THEME_PROGRESSBAR &&
283 0 : !PresContext()->HasAuthorSpecifiedRules(this,
284 0 : NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND) &&
285 0 : barFrame &&
286 0 : barFrame->StyleDisplay()->mAppearance == NS_THEME_PROGRESSCHUNK &&
287 0 : !PresContext()->HasAuthorSpecifiedRules(barFrame,
288 0 : NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND);
289 : }
290 :
291 : Element*
292 0 : nsProgressFrame::GetPseudoElement(CSSPseudoElementType aType)
293 : {
294 0 : if (aType == CSSPseudoElementType::mozProgressBar) {
295 0 : return mBarDiv;
296 : }
297 :
298 0 : return nsContainerFrame::GetPseudoElement(aType);
299 : }
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