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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
#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");
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!");
const auto wm = aReflowInput.GetWritingMode();
const auto contentBoxSize = aReflowInput.ComputedSizeWithBSizeFallback([&] {
nscoord em = OneEmInAppUnits();
return ResolvedOrientationIsVertical() == wm.IsVertical() ? em : 5 * em;
});
aDesiredSize.SetSize(
wm,
contentBoxSize + aReflowInput.ComputedLogicalBorderPadding(wm).Size(wm));
aDesiredSize.SetOverflowAreasToDesiredBounds();
ReflowBarFrame(barFrame, aPresContext, aReflowInput, contentBoxSize, aStatus);
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,
const LogicalSize& aParentContentBoxSize,
nsReflowStatus& aStatus) {
bool vertical = ResolvedOrientationIsVertical();
const WritingMode wm = aBarFrame->GetWritingMode();
const LogicalSize parentSizeInChildWM =
aParentContentBoxSize.ConvertTo(wm, aReflowInput.GetWritingMode());
const nsSize parentPhysicalSize = parentSizeInChildWM.GetPhysicalSize(wm);
LogicalSize availSize = parentSizeInChildWM;
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput reflowInput(aPresContext, aReflowInput, aBarFrame, availSize,
Some(parentSizeInChildWM));
nscoord size =
vertical ? parentPhysicalSize.Height() : parentPhysicalSize.Width();
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 += parentPhysicalSize.Width() - size;
}
// The bar position is *always* constrained.
if (vertical) {
// We want the bar to begin at the bottom.
yoffset += parentPhysicalSize.Height() - 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);
}
nscoord nsMeterFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord minISize = OneEmInAppUnits();
if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
// The orientation is inline
minISize *= 5;
}
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();
}