gecko-dev/layout/forms/nsButtonFrameRenderer.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsButtonFrameRenderer.h"
#include "nsIRenderingContext.h"
#include "nsCSSRendering.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsCSSPseudoElements.h"
#include "nsINameSpaceManager.h"
#include "nsStyleSet.h"
#include "nsDisplayList.h"
#include "nsITheme.h"
#include "nsThemeConstants.h"
#define ACTIVE "active"
#define HOVER "hover"
#define FOCUS "focus"
nsButtonFrameRenderer::nsButtonFrameRenderer()
{
MOZ_COUNT_CTOR(nsButtonFrameRenderer);
}
nsButtonFrameRenderer::~nsButtonFrameRenderer()
{
MOZ_COUNT_DTOR(nsButtonFrameRenderer);
}
void
nsButtonFrameRenderer::SetFrame(nsFrame* aFrame, nsPresContext* aPresContext)
{
mFrame = aFrame;
ReResolveStyles(aPresContext);
}
nsIFrame*
nsButtonFrameRenderer::GetFrame()
{
return mFrame;
}
void
nsButtonFrameRenderer::SetDisabled(PRBool aDisabled, PRBool notify)
{
if (aDisabled)
mFrame->GetContent()->SetAttr(kNameSpaceID_None, nsGkAtoms::disabled, EmptyString(),
notify);
else
mFrame->GetContent()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::disabled, notify);
}
PRBool
nsButtonFrameRenderer::isDisabled()
{
// get the content
return mFrame->GetContent()->HasAttr(kNameSpaceID_None,
nsGkAtoms::disabled);
}
class nsDisplayButtonBorderBackground : public nsDisplayItem {
public:
nsDisplayButtonBorderBackground(nsButtonFrameRenderer* aRenderer)
: nsDisplayItem(aRenderer->GetFrame()), mBFR(aRenderer) {
MOZ_COUNT_CTOR(nsDisplayButtonBorderBackground);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayButtonBorderBackground() {
MOZ_COUNT_DTOR(nsDisplayButtonBorderBackground);
}
#endif
virtual nsIFrame* HitTest(nsDisplayListBuilder* aBuilder, nsPoint aPt,
HitTestState* aState) {
return mFrame;
}
virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx,
const nsRect& aDirtyRect);
NS_DISPLAY_DECL_NAME("ButtonBorderBackground")
private:
nsButtonFrameRenderer* mBFR;
};
class nsDisplayButtonForeground : public nsDisplayItem {
public:
nsDisplayButtonForeground(nsButtonFrameRenderer* aRenderer)
: nsDisplayItem(aRenderer->GetFrame()), mBFR(aRenderer) {
MOZ_COUNT_CTOR(nsDisplayButtonForeground);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayButtonForeground() {
MOZ_COUNT_DTOR(nsDisplayButtonForeground);
}
#endif
virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx,
const nsRect& aDirtyRect);
NS_DISPLAY_DECL_NAME("ButtonForeground")
private:
nsButtonFrameRenderer* mBFR;
};
void nsDisplayButtonBorderBackground::Paint(nsDisplayListBuilder* aBuilder,
nsIRenderingContext* aCtx,
const nsRect& aDirtyRect)
{
NS_ASSERTION(mFrame, "No frame?");
nsPresContext* pc = mFrame->PresContext();
nsRect r = nsRect(aBuilder->ToReferenceFrame(mFrame), mFrame->GetSize());
// draw the border and background inside the focus and outline borders
mBFR->PaintBorderAndBackground(pc, *aCtx, aDirtyRect, r);
}
void nsDisplayButtonForeground::Paint(nsDisplayListBuilder* aBuilder,
nsIRenderingContext* aCtx,
const nsRect& aDirtyRect)
{
nsPresContext *presContext = mFrame->PresContext();
const nsStyleDisplay *disp = mFrame->GetStyleDisplay();
if (!mFrame->IsThemed(disp) ||
!presContext->GetTheme()->ThemeDrawsFocusForWidget(presContext, mFrame, disp->mAppearance)) {
// draw the focus and outline borders
nsRect r = nsRect(aBuilder->ToReferenceFrame(mFrame), mFrame->GetSize());
mBFR->PaintOutlineAndFocusBorders(presContext, *aCtx, aDirtyRect, r);
}
}
nsresult
nsButtonFrameRenderer::DisplayButton(nsDisplayListBuilder* aBuilder,
nsDisplayList* aBackground,
nsDisplayList* aForeground)
{
nsresult rv = aBackground->AppendNewToTop(new (aBuilder)
nsDisplayButtonBorderBackground(this));
NS_ENSURE_SUCCESS(rv, rv);
return aForeground->AppendNewToTop(new (aBuilder)
nsDisplayButtonForeground(this));
}
void
nsButtonFrameRenderer::PaintOutlineAndFocusBorders(nsPresContext* aPresContext,
nsIRenderingContext& 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;
if (mOuterFocusStyle) {
// ---------- paint the outer focus border -------------
GetButtonOuterFocusRect(aRect, rect);
const nsStyleBorder* border = mOuterFocusStyle->GetStyleBorder();
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
aDirtyRect, rect, *border, mOuterFocusStyle);
}
if (mInnerFocusStyle) {
// ---------- paint the inner focus border -------------
GetButtonInnerFocusRect(aRect, rect);
const nsStyleBorder* border = mInnerFocusStyle->GetStyleBorder();
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
aDirtyRect, rect, *border, mInnerFocusStyle);
}
}
void
nsButtonFrameRenderer::PaintBorderAndBackground(nsPresContext* aPresContext,
nsIRenderingContext& 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->GetStyleContext();
const nsStyleBorder* border = context->GetStyleBorder();
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, mFrame,
aDirtyRect, buttonRect, PR_FALSE);
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, mFrame,
aDirtyRect, buttonRect, *border, context);
}
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) {
if (!mOuterFocusStyle->GetStylePadding()->GetPadding(result)) {
NS_NOTYETIMPLEMENTED("percentage padding");
}
result += mOuterFocusStyle->GetStyleBorder()->GetActualBorder();
}
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->GetStyleMargin();
if (!margin->GetMargin(innerFocusMargin)) {
NS_NOTYETIMPLEMENTED("percentage margin");
}
}
return innerFocusMargin;
}
nsMargin
nsButtonFrameRenderer::GetButtonInnerFocusBorderAndPadding()
{
nsMargin result(0,0,0,0);
if (mInnerFocusStyle) {
if (!mInnerFocusStyle->GetStylePadding()->GetPadding(result)) {
NS_NOTYETIMPLEMENTED("percentage padding");
}
result += mInnerFocusStyle->GetStyleBorder()->GetActualBorder();
}
return result;
}
nsMargin
nsButtonFrameRenderer::GetButtonOutlineBorderAndPadding()
{
nsMargin borderAndPadding(0,0,0,0);
return borderAndPadding;
}
// gets the full size of our border with all the focus borders
nsMargin
nsButtonFrameRenderer::GetFullButtonBorderAndPadding()
{
return GetAddedButtonBorderAndPadding() + GetButtonBorderAndPadding();
}
// 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->GetStyleContext();
nsStyleSet *styleSet = aPresContext->StyleSet();
// style for the inner such as a dotted line (Windows)
mInnerFocusStyle = styleSet->ProbePseudoStyleFor(mFrame->GetContent(),
nsCSSPseudoElements::mozFocusInner,
context);
// style for outer focus like a ridged border (MAC).
mOuterFocusStyle = styleSet->ProbePseudoStyleFor(mFrame->GetContent(),
nsCSSPseudoElements::mozFocusOuter,
context);
}
nsStyleContext*
nsButtonFrameRenderer::GetStyleContext(PRInt32 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 nsnull;
}
}
void
nsButtonFrameRenderer::SetStyleContext(PRInt32 aIndex, nsStyleContext* aStyleContext)
{
switch (aIndex) {
case NS_BUTTON_RENDERER_FOCUS_INNER_CONTEXT_INDEX:
mInnerFocusStyle = aStyleContext;
break;
case NS_BUTTON_RENDERER_FOCUS_OUTER_CONTEXT_INDEX:
mOuterFocusStyle = aStyleContext;
break;
}
}