LCOV - code coverage report
Current view: directory - layout/forms - nsGfxCheckboxControlFrame.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 56 0 0.0 %
Date: 2012-06-02 Functions: 12 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "nsGfxCheckboxControlFrame.h"
      39                 : #include "nsIContent.h"
      40                 : #include "nsCOMPtr.h"
      41                 : #include "nsCSSRendering.h"
      42                 : #include "nsRenderingContext.h"
      43                 : #ifdef ACCESSIBILITY
      44                 : #include "nsAccessibilityService.h"
      45                 : #endif
      46                 : #include "nsIServiceManager.h"
      47                 : #include "nsIDOMHTMLInputElement.h"
      48                 : #include "nsDisplayList.h"
      49                 : #include "nsCSSAnonBoxes.h"
      50                 : 
      51                 : static void
      52               0 : PaintCheckMark(nsIFrame* aFrame,
      53                 :                nsRenderingContext* aCtx,
      54                 :                const nsRect& aDirtyRect,
      55                 :                nsPoint aPt)
      56                 : {
      57               0 :   nsRect rect(aPt, aFrame->GetSize());
      58               0 :   rect.Deflate(aFrame->GetUsedBorderAndPadding());
      59                 : 
      60                 :   // Points come from the coordinates on a 7X7 unit box centered at 0,0
      61               0 :   const PRInt32 checkPolygonX[] = { -3, -1,  3,  3, -1, -3 };
      62               0 :   const PRInt32 checkPolygonY[] = { -1,  1, -3, -1,  3,  1 };
      63               0 :   const PRInt32 checkNumPoints = sizeof(checkPolygonX) / sizeof(PRInt32);
      64               0 :   const PRInt32 checkSize      = 9; // 2 units of padding on either side
      65                 :                                     // of the 7x7 unit checkmark
      66                 : 
      67                 :   // Scale the checkmark based on the smallest dimension
      68               0 :   nscoord paintScale = NS_MIN(rect.width, rect.height) / checkSize;
      69                 :   nsPoint paintCenter(rect.x + rect.width  / 2,
      70               0 :                       rect.y + rect.height / 2);
      71                 : 
      72               0 :   nsPoint paintPolygon[checkNumPoints];
      73                 :   // Convert checkmark for screen rendering
      74               0 :   for (PRInt32 polyIndex = 0; polyIndex < checkNumPoints; polyIndex++) {
      75                 :     paintPolygon[polyIndex] = paintCenter +
      76               0 :                               nsPoint(checkPolygonX[polyIndex] * paintScale,
      77               0 :                                       checkPolygonY[polyIndex] * paintScale);
      78                 :   }
      79                 : 
      80               0 :   aCtx->SetColor(aFrame->GetStyleColor()->mColor);
      81               0 :   aCtx->FillPolygon(paintPolygon, checkNumPoints);
      82               0 : }
      83                 : 
      84                 : static void
      85               0 : PaintIndeterminateMark(nsIFrame* aFrame,
      86                 :                        nsRenderingContext* aCtx,
      87                 :                        const nsRect& aDirtyRect,
      88                 :                        nsPoint aPt)
      89                 : {
      90               0 :   nsRect rect(aPt, aFrame->GetSize());
      91               0 :   rect.Deflate(aFrame->GetUsedBorderAndPadding());
      92                 : 
      93               0 :   rect.y += (rect.height - rect.height/4) / 2;
      94               0 :   rect.height /= 4;
      95                 : 
      96               0 :   aCtx->SetColor(aFrame->GetStyleColor()->mColor);
      97               0 :   aCtx->FillRect(rect);
      98               0 : }
      99                 : 
     100                 : //------------------------------------------------------------
     101                 : nsIFrame*
     102               0 : NS_NewGfxCheckboxControlFrame(nsIPresShell* aPresShell,
     103                 :                               nsStyleContext* aContext)
     104                 : {
     105               0 :   return new (aPresShell) nsGfxCheckboxControlFrame(aContext);
     106                 : }
     107                 : 
     108               0 : NS_IMPL_FRAMEARENA_HELPERS(nsGfxCheckboxControlFrame)
     109                 : 
     110                 : 
     111                 : //------------------------------------------------------------
     112                 : // Initialize GFX-rendered state
     113               0 : nsGfxCheckboxControlFrame::nsGfxCheckboxControlFrame(nsStyleContext* aContext)
     114               0 : : nsFormControlFrame(aContext)
     115                 : {
     116               0 : }
     117                 : 
     118               0 : nsGfxCheckboxControlFrame::~nsGfxCheckboxControlFrame()
     119                 : {
     120               0 : }
     121                 : 
     122                 : #ifdef ACCESSIBILITY
     123                 : already_AddRefed<nsAccessible>
     124               0 : nsGfxCheckboxControlFrame::CreateAccessible()
     125                 : {
     126               0 :   nsAccessibilityService* accService = nsIPresShell::AccService();
     127               0 :   if (accService) {
     128                 :     return accService->CreateHTMLCheckboxAccessible(mContent,
     129               0 :                                                     PresContext()->PresShell());
     130                 :   }
     131                 : 
     132               0 :   return nsnull;
     133                 : }
     134                 : #endif
     135                 : 
     136                 : //------------------------------------------------------------
     137                 : NS_IMETHODIMP
     138               0 : nsGfxCheckboxControlFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,
     139                 :                                             const nsRect&           aDirtyRect,
     140                 :                                             const nsDisplayListSet& aLists)
     141                 : {
     142                 :   nsresult rv = nsFormControlFrame::BuildDisplayList(aBuilder, aDirtyRect,
     143               0 :                                                      aLists);
     144               0 :   NS_ENSURE_SUCCESS(rv, rv);
     145                 :   
     146                 :   // Get current checked state through content model.
     147               0 :   if ((!IsChecked() && !IsIndeterminate()) || !IsVisibleForPainting(aBuilder))
     148               0 :     return NS_OK;   // we're not checked or not visible, nothing to paint.
     149                 :     
     150               0 :   if (IsThemed())
     151               0 :     return NS_OK; // No need to paint the checkmark. The theme will do it.
     152                 : 
     153                 :   return aLists.Content()->AppendNewToTop(new (aBuilder)
     154                 :     nsDisplayGeneric(aBuilder, this,
     155               0 :                      IsIndeterminate()
     156                 :                      ? PaintIndeterminateMark : PaintCheckMark,
     157                 :                      "CheckedCheckbox",
     158               0 :                      nsDisplayItem::TYPE_CHECKED_CHECKBOX));
     159                 : }
     160                 : 
     161                 : //------------------------------------------------------------
     162                 : bool
     163               0 : nsGfxCheckboxControlFrame::IsChecked()
     164                 : {
     165               0 :   nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
     166               0 :   bool retval = false;
     167               0 :   elem->GetChecked(&retval);
     168               0 :   return retval;
     169                 : }
     170                 : 
     171                 : bool
     172               0 : nsGfxCheckboxControlFrame::IsIndeterminate()
     173                 : {
     174               0 :   nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
     175               0 :   bool retval = false;
     176               0 :   elem->GetIndeterminate(&retval);
     177               0 :   return retval;
     178                 : }

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