1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/forms/nsMeterFrame.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,282 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsMeterFrame.h"
1.10 +
1.11 +#include "nsIContent.h"
1.12 +#include "nsPresContext.h"
1.13 +#include "nsGkAtoms.h"
1.14 +#include "nsNameSpaceManager.h"
1.15 +#include "nsIDocument.h"
1.16 +#include "nsIPresShell.h"
1.17 +#include "nsNodeInfoManager.h"
1.18 +#include "nsINodeInfo.h"
1.19 +#include "nsContentCreatorFunctions.h"
1.20 +#include "nsContentUtils.h"
1.21 +#include "nsFormControlFrame.h"
1.22 +#include "nsFontMetrics.h"
1.23 +#include "mozilla/dom/Element.h"
1.24 +#include "mozilla/dom/HTMLMeterElement.h"
1.25 +#include "nsContentList.h"
1.26 +#include "nsStyleSet.h"
1.27 +#include "nsThemeConstants.h"
1.28 +#include <algorithm>
1.29 +
1.30 +using mozilla::dom::Element;
1.31 +using mozilla::dom::HTMLMeterElement;
1.32 +
1.33 +nsIFrame*
1.34 +NS_NewMeterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
1.35 +{
1.36 + return new (aPresShell) nsMeterFrame(aContext);
1.37 +}
1.38 +
1.39 +NS_IMPL_FRAMEARENA_HELPERS(nsMeterFrame)
1.40 +
1.41 +nsMeterFrame::nsMeterFrame(nsStyleContext* aContext)
1.42 + : nsContainerFrame(aContext)
1.43 + , mBarDiv(nullptr)
1.44 +{
1.45 +}
1.46 +
1.47 +nsMeterFrame::~nsMeterFrame()
1.48 +{
1.49 +}
1.50 +
1.51 +void
1.52 +nsMeterFrame::DestroyFrom(nsIFrame* aDestructRoot)
1.53 +{
1.54 + NS_ASSERTION(!GetPrevContinuation(),
1.55 + "nsMeterFrame should not have continuations; if it does we "
1.56 + "need to call RegUnregAccessKey only for the first.");
1.57 + nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
1.58 + nsContentUtils::DestroyAnonymousContent(&mBarDiv);
1.59 + nsContainerFrame::DestroyFrom(aDestructRoot);
1.60 +}
1.61 +
1.62 +nsresult
1.63 +nsMeterFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
1.64 +{
1.65 + // Get the NodeInfoManager and tag necessary to create the meter bar div.
1.66 + nsCOMPtr<nsIDocument> doc = mContent->GetDocument();
1.67 +
1.68 + // Create the div.
1.69 + mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
1.70 +
1.71 + // Associate ::-moz-meter-bar pseudo-element to the anonymous child.
1.72 + nsCSSPseudoElements::Type pseudoType = nsCSSPseudoElements::ePseudo_mozMeterBar;
1.73 + nsRefPtr<nsStyleContext> newStyleContext = PresContext()->StyleSet()->
1.74 + ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
1.75 + StyleContext(), mBarDiv->AsElement());
1.76 +
1.77 + if (!aElements.AppendElement(ContentInfo(mBarDiv, newStyleContext))) {
1.78 + return NS_ERROR_OUT_OF_MEMORY;
1.79 + }
1.80 +
1.81 + return NS_OK;
1.82 +}
1.83 +
1.84 +void
1.85 +nsMeterFrame::AppendAnonymousContentTo(nsBaseContentList& aElements,
1.86 + uint32_t aFilter)
1.87 +{
1.88 + aElements.MaybeAppendElement(mBarDiv);
1.89 +}
1.90 +
1.91 +NS_QUERYFRAME_HEAD(nsMeterFrame)
1.92 + NS_QUERYFRAME_ENTRY(nsMeterFrame)
1.93 + NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
1.94 +NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
1.95 +
1.96 +
1.97 +nsresult nsMeterFrame::Reflow(nsPresContext* aPresContext,
1.98 + nsHTMLReflowMetrics& aDesiredSize,
1.99 + const nsHTMLReflowState& aReflowState,
1.100 + nsReflowStatus& aStatus)
1.101 +{
1.102 + DO_GLOBAL_REFLOW_COUNT("nsMeterFrame");
1.103 + DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
1.104 +
1.105 + NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
1.106 + NS_ASSERTION(!GetPrevContinuation(),
1.107 + "nsMeterFrame should not have continuations; if it does we "
1.108 + "need to call RegUnregAccessKey only for the first.");
1.109 +
1.110 + if (mState & NS_FRAME_FIRST_REFLOW) {
1.111 + nsFormControlFrame::RegUnRegAccessKey(this, true);
1.112 + }
1.113 +
1.114 + nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
1.115 + NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
1.116 +
1.117 + ReflowBarFrame(barFrame, aPresContext, aReflowState, aStatus);
1.118 +
1.119 + aDesiredSize.Width() = aReflowState.ComputedWidth() +
1.120 + aReflowState.ComputedPhysicalBorderPadding().LeftRight();
1.121 + aDesiredSize.Height() = aReflowState.ComputedHeight() +
1.122 + aReflowState.ComputedPhysicalBorderPadding().TopBottom();
1.123 +
1.124 + aDesiredSize.SetOverflowAreasToDesiredBounds();
1.125 + ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
1.126 + FinishAndStoreOverflow(&aDesiredSize);
1.127 +
1.128 + aStatus = NS_FRAME_COMPLETE;
1.129 +
1.130 + NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
1.131 +
1.132 + return NS_OK;
1.133 +}
1.134 +
1.135 +void
1.136 +nsMeterFrame::ReflowBarFrame(nsIFrame* aBarFrame,
1.137 + nsPresContext* aPresContext,
1.138 + const nsHTMLReflowState& aReflowState,
1.139 + nsReflowStatus& aStatus)
1.140 +{
1.141 + bool vertical = StyleDisplay()->mOrient == NS_STYLE_ORIENT_VERTICAL;
1.142 + nsHTMLReflowState reflowState(aPresContext, aReflowState, aBarFrame,
1.143 + nsSize(aReflowState.ComputedWidth(),
1.144 + NS_UNCONSTRAINEDSIZE));
1.145 + nscoord size = vertical ? aReflowState.ComputedHeight()
1.146 + : aReflowState.ComputedWidth();
1.147 + nscoord xoffset = aReflowState.ComputedPhysicalBorderPadding().left;
1.148 + nscoord yoffset = aReflowState.ComputedPhysicalBorderPadding().top;
1.149 +
1.150 + // NOTE: Introduce a new function getPosition in the content part ?
1.151 + HTMLMeterElement* meterElement = static_cast<HTMLMeterElement*>(mContent);
1.152 +
1.153 + double max = meterElement->Max();
1.154 + double min = meterElement->Min();
1.155 + double value = meterElement->Value();
1.156 +
1.157 + double position = max - min;
1.158 + position = position != 0 ? (value - min) / position : 1;
1.159 +
1.160 + size = NSToCoordRound(size * position);
1.161 +
1.162 + if (!vertical && StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
1.163 + xoffset += aReflowState.ComputedWidth() - size;
1.164 + }
1.165 +
1.166 + // The bar position is *always* constrained.
1.167 + if (vertical) {
1.168 + // We want the bar to begin at the bottom.
1.169 + yoffset += aReflowState.ComputedHeight() - size;
1.170 +
1.171 + size -= reflowState.ComputedPhysicalMargin().TopBottom() +
1.172 + reflowState.ComputedPhysicalBorderPadding().TopBottom();
1.173 + size = std::max(size, 0);
1.174 + reflowState.SetComputedHeight(size);
1.175 + } else {
1.176 + size -= reflowState.ComputedPhysicalMargin().LeftRight() +
1.177 + reflowState.ComputedPhysicalBorderPadding().LeftRight();
1.178 + size = std::max(size, 0);
1.179 + reflowState.SetComputedWidth(size);
1.180 + }
1.181 +
1.182 + xoffset += reflowState.ComputedPhysicalMargin().left;
1.183 + yoffset += reflowState.ComputedPhysicalMargin().top;
1.184 +
1.185 + nsHTMLReflowMetrics barDesiredSize(reflowState);
1.186 + ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowState, xoffset,
1.187 + yoffset, 0, aStatus);
1.188 + FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowState,
1.189 + xoffset, yoffset, 0);
1.190 +}
1.191 +
1.192 +nsresult
1.193 +nsMeterFrame::AttributeChanged(int32_t aNameSpaceID,
1.194 + nsIAtom* aAttribute,
1.195 + int32_t aModType)
1.196 +{
1.197 + NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
1.198 +
1.199 + if (aNameSpaceID == kNameSpaceID_None &&
1.200 + (aAttribute == nsGkAtoms::value ||
1.201 + aAttribute == nsGkAtoms::max ||
1.202 + aAttribute == nsGkAtoms::min )) {
1.203 + nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
1.204 + NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
1.205 + PresContext()->PresShell()->FrameNeedsReflow(barFrame,
1.206 + nsIPresShell::eResize,
1.207 + NS_FRAME_IS_DIRTY);
1.208 + InvalidateFrame();
1.209 + }
1.210 +
1.211 + return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
1.212 + aModType);
1.213 +}
1.214 +
1.215 +nsSize
1.216 +nsMeterFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
1.217 + nsSize aCBSize, nscoord aAvailableWidth,
1.218 + nsSize aMargin, nsSize aBorder,
1.219 + nsSize aPadding, bool aShrinkWrap)
1.220 +{
1.221 + nsRefPtr<nsFontMetrics> fontMet;
1.222 + NS_ENSURE_SUCCESS(nsLayoutUtils::GetFontMetricsForFrame(this,
1.223 + getter_AddRefs(fontMet)),
1.224 + nsSize(0, 0));
1.225 +
1.226 + nsSize autoSize;
1.227 + autoSize.height = autoSize.width = fontMet->Font().size; // 1em
1.228 +
1.229 + if (StyleDisplay()->mOrient == NS_STYLE_ORIENT_VERTICAL) {
1.230 + autoSize.height *= 5; // 5em
1.231 + } else {
1.232 + autoSize.width *= 5; // 5em
1.233 + }
1.234 +
1.235 + return autoSize;
1.236 +}
1.237 +
1.238 +nscoord
1.239 +nsMeterFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
1.240 +{
1.241 + nsRefPtr<nsFontMetrics> fontMet;
1.242 + NS_ENSURE_SUCCESS(
1.243 + nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet)), 0);
1.244 +
1.245 + nscoord minWidth = fontMet->Font().size; // 1em
1.246 +
1.247 + if (StyleDisplay()->mOrient == NS_STYLE_ORIENT_AUTO ||
1.248 + StyleDisplay()->mOrient == NS_STYLE_ORIENT_HORIZONTAL) {
1.249 + // The orientation is horizontal
1.250 + minWidth *= 5; // 5em
1.251 + }
1.252 +
1.253 + return minWidth;
1.254 +}
1.255 +
1.256 +nscoord
1.257 +nsMeterFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
1.258 +{
1.259 + return GetMinWidth(aRenderingContext);
1.260 +}
1.261 +
1.262 +bool
1.263 +nsMeterFrame::ShouldUseNativeStyle() const
1.264 +{
1.265 + // Use the native style if these conditions are satisfied:
1.266 + // - both frames use the native appearance;
1.267 + // - neither frame has author specified rules setting the border or the
1.268 + // background.
1.269 + return StyleDisplay()->mAppearance == NS_THEME_METERBAR &&
1.270 + mBarDiv->GetPrimaryFrame()->StyleDisplay()->mAppearance == NS_THEME_METERBAR_CHUNK &&
1.271 + !PresContext()->HasAuthorSpecifiedRules(const_cast<nsMeterFrame*>(this),
1.272 + NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND) &&
1.273 + !PresContext()->HasAuthorSpecifiedRules(mBarDiv->GetPrimaryFrame(),
1.274 + NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND);
1.275 +}
1.276 +
1.277 +Element*
1.278 +nsMeterFrame::GetPseudoElement(nsCSSPseudoElements::Type aType)
1.279 +{
1.280 + if (aType == nsCSSPseudoElements::ePseudo_mozMeterBar) {
1.281 + return mBarDiv;
1.282 + }
1.283 +
1.284 + return nsContainerFrame::GetPseudoElement(aType);
1.285 +}
