gecko-dev/layout/forms/nsButtonFrameRenderer.cpp

517 lines
15 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsButtonFrameRenderer.h"
#include "nsCSSRendering.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsCSSPseudoElements.h"
#include "nsNameSpaceManager.h"
#include "mozilla/StyleSetHandle.h"
#include "mozilla/StyleSetHandleInlines.h"
#include "nsDisplayList.h"
#include "nsITheme.h"
#include "nsFrame.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/Element.h"
#define ACTIVE "active"
#define HOVER "hover"
#define FOCUS "focus"
using namespace mozilla;
using namespace mozilla::image;
nsButtonFrameRenderer::nsButtonFrameRenderer()
{
MOZ_COUNT_CTOR(nsButtonFrameRenderer);
}
nsButtonFrameRenderer::~nsButtonFrameRenderer()
{
MOZ_COUNT_DTOR(nsButtonFrameRenderer);
#ifdef DEBUG
if (mInnerFocusStyle) {
mInnerFocusStyle->FrameRelease();
}
if (mOuterFocusStyle) {
mOuterFocusStyle->FrameRelease();
}
#endif
}
void
nsButtonFrameRenderer::SetFrame(nsFrame* aFrame, nsPresContext* aPresContext)
{
mFrame = aFrame;
ReResolveStyles(aPresContext);
}
nsIFrame*
nsButtonFrameRenderer::GetFrame()
{
return mFrame;
}
void
nsButtonFrameRenderer::SetDisabled(bool aDisabled, bool notify)
{
if (aDisabled)
mFrame->GetContent()->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
notify);
else
mFrame->GetContent()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, notify);
}
bool
nsButtonFrameRenderer::isDisabled()
{
return mFrame->GetContent()->AsElement()->
State().HasState(NS_EVENT_STATE_DISABLED);
}
class nsDisplayButtonBoxShadowOuter : public nsDisplayItem {
public:
nsDisplayButtonBoxShadowOuter(nsDisplayListBuilder* aBuilder,
nsButtonFrameRenderer* aRenderer)
: nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
MOZ_COUNT_CTOR(nsDisplayButtonBoxShadowOuter);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayButtonBoxShadowOuter() {
MOZ_COUNT_DTOR(nsDisplayButtonBoxShadowOuter);
}
#endif
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) override;
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) override;
NS_DISPLAY_DECL_NAME("ButtonBoxShadowOuter", TYPE_BUTTON_BOX_SHADOW_OUTER)
private:
nsButtonFrameRenderer* mBFR;
};
nsRect
nsDisplayButtonBoxShadowOuter::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
*aSnap = false;
return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
}
void
nsDisplayButtonBoxShadowOuter::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) {
nsRect frameRect = nsRect(ToReferenceFrame(), mFrame->GetSize());
nsRect buttonRect;
mBFR->GetButtonRect(frameRect, buttonRect);
nsCSSRendering::PaintBoxShadowOuter(mFrame->PresContext(), *aCtx, mFrame,
buttonRect, mVisibleRect);
}
class nsDisplayButtonBorder : public nsDisplayItem {
public:
nsDisplayButtonBorder(nsDisplayListBuilder* aBuilder,
nsButtonFrameRenderer* aRenderer)
: nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
MOZ_COUNT_CTOR(nsDisplayButtonBorder);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayButtonBorder() {
MOZ_COUNT_DTOR(nsDisplayButtonBorder);
}
#endif
virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState,
nsTArray<nsIFrame*> *aOutFrames) override {
aOutFrames->AppendElement(mFrame);
}
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) override;
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) override;
virtual nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override;
virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion) override;
NS_DISPLAY_DECL_NAME("ButtonBorderBackground", TYPE_BUTTON_BORDER_BACKGROUND)
private:
nsButtonFrameRenderer* mBFR;
};
nsDisplayItemGeometry*
nsDisplayButtonBorder::AllocateGeometry(nsDisplayListBuilder* aBuilder)
{
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void
nsDisplayButtonBorder::ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion)
{
auto geometry =
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
if (aBuilder->ShouldSyncDecodeImages() &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
void nsDisplayButtonBorder::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx)
{
NS_ASSERTION(mFrame, "No frame?");
nsPresContext* pc = mFrame->PresContext();
nsRect r = nsRect(ToReferenceFrame(), mFrame->GetSize());
// draw the border and background inside the focus and outline borders
DrawResult result =
mBFR->PaintBorder(aBuilder, pc, *aCtx, mVisibleRect, r);
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
}
nsRect
nsDisplayButtonBorder::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
*aSnap = false;
return aBuilder->IsForEventDelivery() ? nsRect(ToReferenceFrame(), mFrame->GetSize())
: mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
}
class nsDisplayButtonForeground : public nsDisplayItem {
public:
nsDisplayButtonForeground(nsDisplayListBuilder* aBuilder,
nsButtonFrameRenderer* aRenderer)
: nsDisplayItem(aBuilder, aRenderer->GetFrame()), mBFR(aRenderer) {
MOZ_COUNT_CTOR(nsDisplayButtonForeground);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayButtonForeground() {
MOZ_COUNT_DTOR(nsDisplayButtonForeground);
}
#endif
nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override;
void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion) override;
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) override;
NS_DISPLAY_DECL_NAME("ButtonForeground", TYPE_BUTTON_FOREGROUND)
private:
nsButtonFrameRenderer* mBFR;
};
nsDisplayItemGeometry*
nsDisplayButtonForeground::AllocateGeometry(nsDisplayListBuilder* aBuilder)
{
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void
nsDisplayButtonForeground::ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion)
{
auto geometry =
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
if (aBuilder->ShouldSyncDecodeImages() &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
void nsDisplayButtonForeground::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx)
{
nsPresContext *presContext = mFrame->PresContext();
const nsStyleDisplay *disp = mFrame->StyleDisplay();
if (!mFrame->IsThemed(disp) ||
!presContext->GetTheme()->ThemeDrawsFocusForWidget(disp->mAppearance)) {
nsRect r = nsRect(ToReferenceFrame(), mFrame->GetSize());
// Draw the focus and outline borders.
DrawResult result =
mBFR->PaintOutlineAndFocusBorders(aBuilder, presContext, *aCtx,
mVisibleRect, r);
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
}
}
nsresult
nsButtonFrameRenderer::DisplayButton(nsDisplayListBuilder* aBuilder,
nsDisplayList* aBackground,
nsDisplayList* aForeground)
{
if (mFrame->StyleEffects()->mBoxShadow) {
aBackground->AppendNewToTop(new (aBuilder)
nsDisplayButtonBoxShadowOuter(aBuilder, this));
}
nsRect buttonRect;
GetButtonRect(mFrame->GetRectRelativeToSelf(), buttonRect);
nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
aBuilder, mFrame, buttonRect, aBackground);
aBackground->AppendNewToTop(new (aBuilder)
nsDisplayButtonBorder(aBuilder, this));
// Only display focus rings if we actually have them. Since at most one
// button would normally display a focus ring, most buttons won't have them.
if ((mOuterFocusStyle && mOuterFocusStyle->StyleBorder()->HasBorder()) ||
(mInnerFocusStyle && mInnerFocusStyle->StyleBorder()->HasBorder())) {
aForeground->AppendNewToTop(new (aBuilder)
nsDisplayButtonForeground(aBuilder, this));
}
return NS_OK;
}
DrawResult
nsButtonFrameRenderer::PaintOutlineAndFocusBorders(
nsDisplayListBuilder* aBuilder,
nsPresContext* aPresContext,
nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
const nsRect& aRect)
{
// once we have all that we'll draw the focus if we have it. We will
// need to draw 2 focuses, the inner and the outer. This is so we
// can do any kind of look and feel. Some buttons have focus on the
// outside like mac and motif. While others like windows have it
// inside (dotted line). Usually only one will be specifed. But I
// guess you could have both if you wanted to.
nsRect rect;
PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages()
? PaintBorderFlags::SYNC_DECODE_IMAGES
: PaintBorderFlags();
DrawResult result = DrawResult::SUCCESS;
if (mOuterFocusStyle) {
// ---------- paint the outer focus border -------------
GetButtonOuterFocusRect(aRect, rect);
result &=
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
aDirtyRect, rect, mOuterFocusStyle, flags);
}
if (mInnerFocusStyle) {
// ---------- paint the inner focus border -------------
GetButtonInnerFocusRect(aRect, rect);
result &=
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
aDirtyRect, rect, mInnerFocusStyle, flags);
}
return result;
}
DrawResult
nsButtonFrameRenderer::PaintBorder(
nsDisplayListBuilder* aBuilder,
nsPresContext* aPresContext,
nsRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
const nsRect& aRect)
{
// get the button rect this is inside the focus and outline rects
nsRect buttonRect;
GetButtonRect(aRect, buttonRect);
nsStyleContext* context = mFrame->StyleContext();
PaintBorderFlags borderFlags = aBuilder->ShouldSyncDecodeImages()
? PaintBorderFlags::SYNC_DECODE_IMAGES
: PaintBorderFlags();
nsCSSRendering::PaintBoxShadowInner(aPresContext, aRenderingContext,
mFrame, buttonRect);
DrawResult result =
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
aDirtyRect, buttonRect, context, borderFlags);
return result;
}
void
nsButtonFrameRenderer::GetButtonOuterFocusRect(const nsRect& aRect, nsRect& focusRect)
{
focusRect = aRect;
}
void
nsButtonFrameRenderer::GetButtonRect(const nsRect& aRect, nsRect& r)
{
r = aRect;
r.Deflate(GetButtonOuterFocusBorderAndPadding());
}
void
nsButtonFrameRenderer::GetButtonInnerFocusRect(const nsRect& aRect, nsRect& focusRect)
{
GetButtonRect(aRect, focusRect);
focusRect.Deflate(GetButtonBorderAndPadding());
focusRect.Deflate(GetButtonInnerFocusMargin());
}
nsMargin
nsButtonFrameRenderer::GetButtonOuterFocusBorderAndPadding()
{
nsMargin result(0,0,0,0);
if (mOuterFocusStyle) {
mOuterFocusStyle->StylePadding()->GetPadding(result);
result += mOuterFocusStyle->StyleBorder()->GetComputedBorder();
}
return result;
}
nsMargin
nsButtonFrameRenderer::GetButtonBorderAndPadding()
{
return mFrame->GetUsedBorderAndPadding();
}
/**
* Gets the size of the buttons border this is the union of the normal and disabled borders.
*/
nsMargin
nsButtonFrameRenderer::GetButtonInnerFocusMargin()
{
nsMargin innerFocusMargin(0,0,0,0);
if (mInnerFocusStyle) {
const nsStyleMargin* margin = mInnerFocusStyle->StyleMargin();
margin->GetMargin(innerFocusMargin);
}
return innerFocusMargin;
}
nsMargin
nsButtonFrameRenderer::GetButtonInnerFocusBorderAndPadding()
{
nsMargin result(0,0,0,0);
if (mInnerFocusStyle) {
mInnerFocusStyle->StylePadding()->GetPadding(result);
result += mInnerFocusStyle->StyleBorder()->GetComputedBorder();
}
return result;
}
// gets all the focus borders and padding that will be added to the regular border
nsMargin
nsButtonFrameRenderer::GetAddedButtonBorderAndPadding()
{
return GetButtonOuterFocusBorderAndPadding() + GetButtonInnerFocusMargin() + GetButtonInnerFocusBorderAndPadding();
}
/**
* Call this when styles change
*/
void
nsButtonFrameRenderer::ReResolveStyles(nsPresContext* aPresContext)
{
// get all the styles
nsStyleContext* context = mFrame->StyleContext();
StyleSetHandle styleSet = aPresContext->StyleSet();
#ifdef DEBUG
if (mInnerFocusStyle) {
mInnerFocusStyle->FrameRelease();
}
if (mOuterFocusStyle) {
mOuterFocusStyle->FrameRelease();
}
#endif
// style for the inner such as a dotted line (Windows)
mInnerFocusStyle =
styleSet->ProbePseudoElementStyle(mFrame->GetContent()->AsElement(),
CSSPseudoElementType::mozFocusInner,
context);
// style for outer focus like a ridged border (MAC).
mOuterFocusStyle =
styleSet->ProbePseudoElementStyle(mFrame->GetContent()->AsElement(),
CSSPseudoElementType::mozFocusOuter,
context);
#ifdef DEBUG
if (mInnerFocusStyle) {
mInnerFocusStyle->FrameAddRef();
}
if (mOuterFocusStyle) {
mOuterFocusStyle->FrameAddRef();
}
#endif
}
nsStyleContext*
nsButtonFrameRenderer::GetStyleContext(int32_t aIndex) const
{
switch (aIndex) {
case NS_BUTTON_RENDERER_FOCUS_INNER_CONTEXT_INDEX:
return mInnerFocusStyle;
case NS_BUTTON_RENDERER_FOCUS_OUTER_CONTEXT_INDEX:
return mOuterFocusStyle;
default:
return nullptr;
}
}
void
nsButtonFrameRenderer::SetStyleContext(int32_t aIndex, nsStyleContext* aStyleContext)
{
switch (aIndex) {
case NS_BUTTON_RENDERER_FOCUS_INNER_CONTEXT_INDEX:
#ifdef DEBUG
if (mInnerFocusStyle) {
mInnerFocusStyle->FrameRelease();
}
#endif
mInnerFocusStyle = aStyleContext;
break;
case NS_BUTTON_RENDERER_FOCUS_OUTER_CONTEXT_INDEX:
#ifdef DEBUG
if (mOuterFocusStyle) {
mOuterFocusStyle->FrameRelease();
}
#endif
mOuterFocusStyle = aStyleContext;
break;
}
#ifdef DEBUG
aStyleContext->FrameAddRef();
#endif
}