michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsScriptableRegion.h"
michael@0: #include <stdint.h>                     // for uint32_t
michael@0: #include <sys/types.h>                  // for int32_t
michael@0: #include "js/RootingAPI.h"              // for Rooted
michael@0: #include "js/Value.h"                   // for INT_TO_JSVAL, etc
michael@0: #include "jsapi.h"                      // for JS_DefineElement, etc
michael@0: #include "mozilla/Assertions.h"         // for MOZ_ASSERT_HELPER2
michael@0: #include "nsError.h"                    // for NS_OK, NS_ERROR_FAILURE, etc
michael@0: #include "nsID.h"
michael@0: #include "nsRect.h"                     // for nsIntRect
michael@0: #include "nscore.h"                     // for NS_IMETHODIMP
michael@0: 
michael@0: class JSObject;
michael@0: struct JSContext;
michael@0: 
michael@0: nsScriptableRegion::nsScriptableRegion()
michael@0: {
michael@0: }
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsScriptableRegion, nsIScriptableRegion)
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::Init()
michael@0: {
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::SetToRegion(nsIScriptableRegion *aRegion)
michael@0: {
michael@0:   aRegion->GetRegion(&mRegion);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::SetToRect(int32_t aX, int32_t aY, int32_t aWidth, int32_t aHeight)
michael@0: {
michael@0:   mRegion = nsIntRect(aX, aY, aWidth, aHeight);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::IntersectRegion(nsIScriptableRegion *aRegion)
michael@0: {
michael@0:   nsIntRegion region;
michael@0:   aRegion->GetRegion(&region);
michael@0:   mRegion.And(mRegion, region);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::IntersectRect(int32_t aX, int32_t aY, int32_t aWidth, int32_t aHeight)
michael@0: {
michael@0:   mRegion.And(mRegion, nsIntRect(aX, aY, aWidth, aHeight));
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::UnionRegion(nsIScriptableRegion *aRegion)
michael@0: {
michael@0:   nsIntRegion region;
michael@0:   aRegion->GetRegion(&region);
michael@0:   mRegion.Or(mRegion, region);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::UnionRect(int32_t aX, int32_t aY, int32_t aWidth, int32_t aHeight)
michael@0: {
michael@0:   mRegion.Or(mRegion, nsIntRect(aX, aY, aWidth, aHeight));
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::SubtractRegion(nsIScriptableRegion *aRegion)
michael@0: {
michael@0:   nsIntRegion region;
michael@0:   aRegion->GetRegion(&region);
michael@0:   mRegion.Sub(mRegion, region);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::SubtractRect(int32_t aX, int32_t aY, int32_t aWidth, int32_t aHeight)
michael@0: {
michael@0:   mRegion.Sub(mRegion, nsIntRect(aX, aY, aWidth, aHeight));
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::IsEmpty(bool *isEmpty)
michael@0: {
michael@0:   *isEmpty = mRegion.IsEmpty();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::IsEqualRegion(nsIScriptableRegion *aRegion, bool *isEqual)
michael@0: {
michael@0:   nsIntRegion region;
michael@0:   aRegion->GetRegion(&region);
michael@0:   *isEqual = mRegion.IsEqual(region);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::GetBoundingBox(int32_t *aX, int32_t *aY, int32_t *aWidth, int32_t *aHeight)
michael@0: {
michael@0:   nsIntRect boundRect = mRegion.GetBounds();
michael@0:   *aX = boundRect.x;
michael@0:   *aY = boundRect.y;
michael@0:   *aWidth = boundRect.width;
michael@0:   *aHeight = boundRect.height;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::Offset(int32_t aXOffset, int32_t aYOffset)
michael@0: {
michael@0:   mRegion.MoveBy(aXOffset, aYOffset);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::ContainsRect(int32_t aX, int32_t aY, int32_t aWidth, int32_t aHeight, bool *containsRect)
michael@0: {
michael@0:   *containsRect = mRegion.Contains(nsIntRect(aX, aY, aWidth, aHeight));
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::GetRegion(nsIntRegion* outRgn)
michael@0: {
michael@0:   *outRgn = mRegion;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsScriptableRegion::GetRects(JSContext* aCx, JS::MutableHandle<JS::Value> aRects)
michael@0: {
michael@0:   uint32_t numRects = mRegion.GetNumRects();
michael@0: 
michael@0:   if (!numRects) {
michael@0:     aRects.setNull();
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   JS::Rooted<JSObject*> destArray(aCx, JS_NewArrayObject(aCx, numRects * 4));
michael@0:   if (!destArray) {
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0:   }
michael@0: 
michael@0:   aRects.setObject(*destArray);
michael@0: 
michael@0:   uint32_t n = 0;
michael@0:   nsIntRegionRectIterator iter(mRegion);
michael@0:   const nsIntRect *rect;
michael@0: 
michael@0:   while ((rect = iter.Next())) {
michael@0:     if (!JS_DefineElement(aCx, destArray, n, INT_TO_JSVAL(rect->x), nullptr, nullptr, JSPROP_ENUMERATE) ||
michael@0:         !JS_DefineElement(aCx, destArray, n + 1, INT_TO_JSVAL(rect->y), nullptr, nullptr, JSPROP_ENUMERATE) ||
michael@0:         !JS_DefineElement(aCx, destArray, n + 2, INT_TO_JSVAL(rect->width), nullptr, nullptr, JSPROP_ENUMERATE) ||
michael@0:         !JS_DefineElement(aCx, destArray, n + 3, INT_TO_JSVAL(rect->height), nullptr, nullptr, JSPROP_ENUMERATE)) {
michael@0:       return NS_ERROR_FAILURE;
michael@0:     }
michael@0:     n += 4;
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }