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306 lines
11 KiB
C++
306 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsGfxCheckboxControlFrame.h"
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#include "nsIContent.h"
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#include "nsCOMPtr.h"
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#include "nsCSSRendering.h"
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#ifdef ACCESSIBILITY
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#include "nsIAccessibilityService.h"
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#endif
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#include "nsIServiceManager.h"
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#include "nsIDOMHTMLInputElement.h"
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#include "nsDisplayList.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsIDOMNSHTMLInputElement.h"
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static void
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PaintCheckMark(nsIRenderingContext& aRenderingContext,
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const nsRect& aRect)
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{
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// Points come from the coordinates on a 7X7 unit box centered at 0,0
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const PRInt32 checkPolygonX[] = { -3, -1, 3, 3, -1, -3 };
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const PRInt32 checkPolygonY[] = { -1, 1, -3, -1, 3, 1 };
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const PRInt32 checkNumPoints = sizeof(checkPolygonX) / sizeof(PRInt32);
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const PRInt32 checkSize = 9; // This is value is determined by adding 2
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// units to pad the 7x7 unit checkmark
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// Scale the checkmark based on the smallest dimension
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nscoord paintScale = PR_MIN(aRect.width, aRect.height) / checkSize;
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nsPoint paintCenter(aRect.x + aRect.width / 2,
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aRect.y + aRect.height / 2);
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nsPoint paintPolygon[checkNumPoints];
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// Convert checkmark for screen rendering
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for (PRInt32 polyIndex = 0; polyIndex < checkNumPoints; polyIndex++) {
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paintPolygon[polyIndex] = paintCenter +
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nsPoint(checkPolygonX[polyIndex] * paintScale,
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checkPolygonY[polyIndex] * paintScale);
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}
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aRenderingContext.FillPolygon(paintPolygon, checkNumPoints);
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}
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static void
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PaintIndeterminateMark(nsIRenderingContext& aRenderingContext,
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const nsRect& aRect)
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{
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// Drawing a thin horizontal line in the middle of the rect.
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nsRect fillRect = aRect;
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fillRect.height /= 4;
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fillRect.y += (aRect.height - fillRect.height) / 2;
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aRenderingContext.FillRect(fillRect);
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}
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//------------------------------------------------------------
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nsIFrame*
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NS_NewGfxCheckboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsGfxCheckboxControlFrame(aContext);
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}
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//------------------------------------------------------------
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// Initialize GFX-rendered state
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nsGfxCheckboxControlFrame::nsGfxCheckboxControlFrame(nsStyleContext* aContext)
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: nsFormControlFrame(aContext)
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{
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}
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nsGfxCheckboxControlFrame::~nsGfxCheckboxControlFrame()
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{
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}
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NS_QUERYFRAME_HEAD(nsGfxCheckboxControlFrame)
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NS_QUERYFRAME_ENTRY(nsICheckboxControlFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsFormControlFrame)
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsFormControlFrame::Init(aContent, aParent, aPrevInFlow);
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if (NS_SUCCEEDED(rv)) {
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mCheckButtonFaceStyle =
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PresContext()->PresShell()->StyleSet()->
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ResolvePseudoStyleFor(aContent, nsCSSAnonBoxes::check,
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GetStyleContext());
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}
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return rv;
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}
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#ifdef ACCESSIBILITY
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NS_IMETHODIMP nsGfxCheckboxControlFrame::GetAccessible(nsIAccessible** aAccessible)
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{
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nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
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if (accService) {
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return accService->CreateHTMLCheckboxAccessible(static_cast<nsIFrame*>(this), aAccessible);
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}
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return NS_ERROR_FAILURE;
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}
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#endif
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//--------------------------------------------------------------
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nsStyleContext*
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nsGfxCheckboxControlFrame::GetAdditionalStyleContext(PRInt32 aIndex) const
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{
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switch (aIndex) {
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case NS_GFX_CHECKBOX_CONTROL_FRAME_FACE_CONTEXT_INDEX:
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return mCheckButtonFaceStyle;
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break;
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default:
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return nsnull;
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}
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}
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//--------------------------------------------------------------
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void
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nsGfxCheckboxControlFrame::SetAdditionalStyleContext(PRInt32 aIndex,
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nsStyleContext* aStyleContext)
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{
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switch (aIndex) {
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case NS_GFX_CHECKBOX_CONTROL_FRAME_FACE_CONTEXT_INDEX:
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mCheckButtonFaceStyle = aStyleContext;
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break;
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}
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}
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//------------------------------------------------------------
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::OnChecked(nsPresContext* aPresContext,
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PRBool aChecked)
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{
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InvalidateOverflowRect();
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return NS_OK;
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}
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static void PaintCheckMarkFromStyle(nsIFrame* aFrame,
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nsIRenderingContext* aCtx, const nsRect& aDirtyRect, nsPoint aPt) {
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static_cast<nsGfxCheckboxControlFrame*>(aFrame)
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->PaintCheckBoxFromStyle(*aCtx, aPt, aDirtyRect);
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}
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class nsDisplayCheckMark : public nsDisplayItem {
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public:
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nsDisplayCheckMark(nsGfxCheckboxControlFrame* aFrame)
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: nsDisplayItem(aFrame) {
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MOZ_COUNT_CTOR(nsDisplayCheckMark);
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplayCheckMark() {
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MOZ_COUNT_DTOR(nsDisplayCheckMark);
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}
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#endif
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virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx,
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const nsRect& aDirtyRect);
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NS_DISPLAY_DECL_NAME("CheckMark")
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};
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void
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nsDisplayCheckMark::Paint(nsDisplayListBuilder* aBuilder,
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nsIRenderingContext* aCtx, const nsRect& aDirtyRect) {
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static_cast<nsGfxCheckboxControlFrame*>(mFrame)->
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PaintCheckBox(*aCtx, aBuilder->ToReferenceFrame(mFrame), aDirtyRect);
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}
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//------------------------------------------------------------
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void
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nsGfxCheckboxControlFrame::PaintCheckBox(nsIRenderingContext& aRenderingContext,
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nsPoint aPt,
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const nsRect& aDirtyRect)
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{
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// REVIEW: moved the mAppearance test out so we avoid constructing
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// a display item if it's not needed
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nsRect checkRect(aPt, mRect.Size());
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checkRect.Deflate(GetUsedBorderAndPadding());
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const nsStyleColor* color = GetStyleColor();
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aRenderingContext.SetColor(color->mColor);
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if (IsIndeterminate())
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PaintIndeterminateMark(aRenderingContext, checkRect);
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else
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PaintCheckMark(aRenderingContext, checkRect);
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}
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//------------------------------------------------------------
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NS_IMETHODIMP
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nsGfxCheckboxControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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nsresult rv = nsFormControlFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
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NS_ENSURE_SUCCESS(rv, rv);
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// Get current checked state through content model.
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if ((!IsChecked() && !IsIndeterminate()) || !IsVisibleForPainting(aBuilder))
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return NS_OK; // we're not checked or not visible, nothing to paint.
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if (IsThemed())
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return NS_OK; // No need to paint the checkmark. The theme will do it.
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// Paint the checkmark
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if (mCheckButtonFaceStyle) {
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// This code actually works now; not sure how useful it'll be
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// (The purpose is to allow the UA stylesheet to substitute its own
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// checkmark for the default one)
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// XXXbz maybe we should just remove this, together with the
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// attendant complexity
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const nsStyleBackground* myBackground = mCheckButtonFaceStyle->GetStyleBackground();
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if (!myBackground->IsTransparent())
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return aLists.Content()->AppendNewToTop(new (aBuilder)
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nsDisplayGeneric(this, PaintCheckMarkFromStyle, "CheckMarkFromStyle"));
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}
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return aLists.Content()->AppendNewToTop(new (aBuilder) nsDisplayCheckMark(this));
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}
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void
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nsGfxCheckboxControlFrame::PaintCheckBoxFromStyle(
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nsIRenderingContext& aRenderingContext, nsPoint aPt, const nsRect& aDirtyRect) {
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const nsStylePosition* myPosition = mCheckButtonFaceStyle->GetStylePosition();
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const nsStyleBorder* myBorder = mCheckButtonFaceStyle->GetStyleBorder();
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const nsStyleBackground* myBackground = mCheckButtonFaceStyle->GetStyleBackground();
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NS_ASSERTION(myPosition->mWidth.GetUnit() == eStyleUnit_Coord &&
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myPosition->mHeight.GetUnit() == eStyleUnit_Coord,
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"styles for :-moz-checkbox are incorrect or author-accessible");
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nscoord width = myPosition->mWidth.GetCoordValue();
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nscoord height = myPosition->mHeight.GetCoordValue();
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// Position the button centered within the control's rectangle.
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nscoord x = (mRect.width - width) / 2;
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nscoord y = (mRect.height - height) / 2;
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nsRect rect(aPt.x + x, aPt.y + y, width, height);
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nsCSSRendering::PaintBackgroundWithSC(PresContext(), aRenderingContext,
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this, aDirtyRect, rect, *myBackground,
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*myBorder, PR_FALSE);
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nsCSSRendering::PaintBorder(PresContext(), aRenderingContext, this,
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aDirtyRect, rect, *myBorder,
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mCheckButtonFaceStyle);
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}
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//------------------------------------------------------------
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PRBool
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nsGfxCheckboxControlFrame::IsChecked()
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{
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nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
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PRBool retval = PR_FALSE;
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elem->GetChecked(&retval);
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return retval;
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}
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PRBool
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nsGfxCheckboxControlFrame::IsIndeterminate()
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{
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nsCOMPtr<nsIDOMNSHTMLInputElement> elem(do_QueryInterface(mContent));
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PRBool retval = PR_FALSE;
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elem->GetIndeterminate(&retval);
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return retval;
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}
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