gfx/src/nsScriptableRegion.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  *
   3  * ***** BEGIN LICENSE BLOCK *****
   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
   8  * the License. You may obtain a copy of the License at
   9  * http://www.mozilla.org/MPL/
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  11  * Software distributed under the License is distributed on an "AS IS" basis,
  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13  * for the specific language governing rights and limitations under the
  14  * License.
  15  *
  16  * The Original Code is Mozilla Communicator.
  17  *
  18  * The Initial Developer of the Original Code is
  19  * Netscape Communications Corp.
  20  * Portions created by the Initial Developer are Copyright (C) 1999
  21  * the Initial Developer. All Rights Reserved.
  22  *
  23  * Contributor(s):
  24  *   Patrick Beard
  25  *   Taras Glek
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  27  * Alternatively, the contents of this file may be used under the terms of
  28  * either of the GNU General Public License Version 2 or later (the "GPL"),
  29  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  36  * the provisions above, a recipient may use your version of this file under
  37  * the terms of any one of the MPL, the GPL or the LGPL.
  38  *
  39  * ***** END LICENSE BLOCK ***** */
  40
  41 #include "nsScriptableRegion.h"
  42 #include "nsCOMPtr.h"
  43 #include "nsIXPConnect.h"
  44 #include "nsServiceManagerUtils.h"
  45 #include "jsapi.h"
  46
  47 nsScriptableRegion::nsScriptableRegion(nsIRegion* region) : mRegion(nsnull), mRectSet(nsnull)
  48 {
  49         mRegion = region;
  50         NS_IF_ADDREF(mRegion);
  51 }
  52
  53 nsScriptableRegion::~nsScriptableRegion()
  54 {
  55   if (mRegion) {
  56     mRegion->FreeRects(mRectSet);
  57     NS_RELEASE(mRegion);
  58   }
  59 }
  60
  61 NS_IMPL_ISUPPORTS1(nsScriptableRegion, nsIScriptableRegion)
  62
  63 NS_IMETHODIMP nsScriptableRegion::Init()
  64 {
  65         return mRegion->Init();
  66 }
  67
  68 NS_IMETHODIMP nsScriptableRegion::SetToRegion(nsIScriptableRegion *aRegion)
  69 {
  70         nsCOMPtr<nsIRegion> region(do_QueryInterface(aRegion));
  71         mRegion->SetTo(*region);
  72         return NS_OK;
  73 }
  74
  75 NS_IMETHODIMP nsScriptableRegion::SetToRect(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight)
  76 {
  77         mRegion->SetTo(aX, aY, aWidth, aHeight);
  78         return NS_OK;
  79 }
  80
  81 NS_IMETHODIMP nsScriptableRegion::IntersectRegion(nsIScriptableRegion *aRegion)
  82 {
  83         nsCOMPtr<nsIRegion> region(do_QueryInterface(aRegion));
  84         mRegion->Intersect(*region);
  85         return NS_OK;
  86 }
  87
  88 NS_IMETHODIMP nsScriptableRegion::IntersectRect(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight)
  89 {
  90         mRegion->Intersect(aX, aY, aWidth, aHeight);
  91         return NS_OK;
  92 }
  93
  94 NS_IMETHODIMP nsScriptableRegion::UnionRegion(nsIScriptableRegion *aRegion)
  95 {
  96         nsCOMPtr<nsIRegion> region(do_QueryInterface(aRegion));
  97         mRegion->Union(*region);
  98         return NS_OK;
  99 }
 100
 101 NS_IMETHODIMP nsScriptableRegion::UnionRect(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight)
 102 {
 103         mRegion->Union(aX, aY, aWidth, aHeight);
 104         return NS_OK;
 105 }
 106
 107 NS_IMETHODIMP nsScriptableRegion::SubtractRegion(nsIScriptableRegion *aRegion)
 108 {
 109         nsCOMPtr<nsIRegion> region(do_QueryInterface(aRegion));
 110         mRegion->Subtract(*region);
 111         return NS_OK;
 112 }
 113
 114 NS_IMETHODIMP nsScriptableRegion::SubtractRect(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight)
 115 {
 116         mRegion->Subtract(aX, aY, aWidth, aHeight);
 117         return NS_OK;
 118 }
 119
 120 NS_IMETHODIMP nsScriptableRegion::IsEmpty(PRBool *isEmpty)
 121 {
 122         *isEmpty = mRegion->IsEmpty();
 123         return NS_OK;
 124 }
 125
 126 NS_IMETHODIMP nsScriptableRegion::IsEqualRegion(nsIScriptableRegion *aRegion, PRBool *isEqual)
 127 {
 128         nsCOMPtr<nsIRegion> region(do_QueryInterface(aRegion));
 129         *isEqual = mRegion->IsEqual(*region);
 130         return NS_OK;
 131 }
 132
 133 NS_IMETHODIMP nsScriptableRegion::GetBoundingBox(PRInt32 *aX, PRInt32 *aY, PRInt32 *aWidth, PRInt32 *aHeight)
 134 {
 135         mRegion->GetBoundingBox(aX, aY, aWidth, aHeight);
 136         return NS_OK;
 137 }
 138
 139 NS_IMETHODIMP nsScriptableRegion::Offset(PRInt32 aXOffset, PRInt32 aYOffset)
 140 {
 141         mRegion->Offset(aXOffset, aYOffset);
 142         return NS_OK;
 143 }
 144
 145 NS_IMETHODIMP nsScriptableRegion::ContainsRect(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt32 aHeight, PRBool *containsRect)
 146 {
 147         *containsRect = mRegion->ContainsRect(aX, aY, aWidth, aHeight);
 148         return NS_OK;
 149 }
 150
 151
 152 NS_IMETHODIMP nsScriptableRegion::GetRegion(nsIRegion** outRgn)
 153 {
 154   *outRgn = mRegion;
 155   NS_IF_ADDREF(*outRgn);
 156   return NS_OK;
 157 }
 158
 159 NS_IMETHODIMP nsScriptableRegion::GetRects() {
 160   nsAXPCNativeCallContext *ncc = nsnull;
 161   nsresult rv;
 162   nsCOMPtr<nsIXPConnect> xpConnect = do_GetService(nsIXPConnect::GetCID(), &rv);
 163   NS_ENSURE_SUCCESS(rv, rv);
 164
 165   rv = xpConnect->GetCurrentNativeCallContext(&ncc);
 166   NS_ENSURE_SUCCESS(rv, rv);
 167
 168   if (!ncc)
 169     return NS_ERROR_FAILURE;
 170
 171   jsval *retvalPtr;
 172   ncc->GetRetValPtr(&retvalPtr);
 173
 174   rv = mRegion->GetRects(&mRectSet);
 175   NS_ENSURE_SUCCESS(rv, rv);
 176
 177   if (!mRectSet->mNumRects) {
 178     *retvalPtr = JSVAL_NULL;
 179     ncc->SetReturnValueWasSet(PR_TRUE);
 180     return NS_OK;
 181   }
 182
 183   JSContext *cx = nsnull;
 184
 185   rv = ncc->GetJSContext(&cx);
 186   NS_ENSURE_SUCCESS(rv, rv);
 187
 188   JSObject *destArray = JS_NewArrayObject(cx, mRectSet->mNumRects*4, NULL);
 189   *retvalPtr = OBJECT_TO_JSVAL(destArray);
 190   ncc->SetReturnValueWasSet(PR_TRUE);
 191
 192   for(PRUint32 i = 0; i < mRectSet->mNumRects; i++) {
 193     nsRegionRect &rect = mRectSet->mRects[i];
 194     int n = i*4;
 195     // This will contain bogus data if values don't fit in 31 bit
 196     JS_DefineElement(cx, destArray, n, INT_TO_JSVAL(rect.x), NULL, NULL, JSPROP_ENUMERATE);
 197     JS_DefineElement(cx, destArray, n+1, INT_TO_JSVAL(rect.y), NULL, NULL, JSPROP_ENUMERATE);
 198     JS_DefineElement(cx, destArray, n+2, INT_TO_JSVAL(rect.width), NULL, NULL, JSPROP_ENUMERATE);
 199     JS_DefineElement(cx, destArray, n+3, INT_TO_JSVAL(rect.height), NULL, NULL, JSPROP_ENUMERATE);
 200   }
 201
 202   NS_ENSURE_SUCCESS(rv, rv);
 203   return NS_OK;
 204 }