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/* -*- 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 "nsNameSpaceManager.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsFontMetrics.h"
#include "nsCSSPseudoElements.h"
#include "nsStyleConsts.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::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
NS_ASSERTION(!GetPrevContinuation(),
"nsMeterFrame should not have continuations; if it does we "
"need to call RegUnregAccessKey only for the first.");
aPostDestroyData.AddAnonymousContent(mBarDiv.forget());
nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
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 ::-moz-meter-bar pseudo-element to the anonymous child.
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();
}
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