mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
740 lines
24 KiB
C++
740 lines
24 KiB
C++
/* ***** 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.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corp.
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* Portions created by the Initial Developer are Copyright (C) 2003
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Daniel Glazman (glazman@netscape.com) (Original author)
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 <math.h>
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#include "nsHTMLEditor.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIEditor.h"
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#include "nsIPresShell.h"
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#include "nsISelection.h"
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#include "nsTextEditUtils.h"
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#include "nsEditorUtils.h"
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#include "nsHTMLEditUtils.h"
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#include "nsTextEditRules.h"
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#include "nsIHTMLEditRules.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsIDOMNSHTMLElement.h"
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#include "nsIDOMNodeList.h"
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#include "nsIDOMEventTarget.h"
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#include "nsIPrefBranch.h"
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#include "nsIPrefService.h"
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#include "nsIServiceManager.h"
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#include "nsIDOMCSSValue.h"
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#include "nsIDOMCSSPrimitiveValue.h"
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#include "nsIDOMRGBColor.h"
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#define BLACK_BG_RGB_TRIGGER 0xd0
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NS_IMETHODIMP
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nsHTMLEditor::AbsolutePositionSelection(PRBool aEnabled)
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{
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nsAutoEditBatch beginBatching(this);
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nsAutoRules beginRulesSniffing(this,
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aEnabled ? kOpSetAbsolutePosition :
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kOpRemoveAbsolutePosition,
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nsIEditor::eNext);
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// the line below does not match the code; should it be removed?
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// Find out if the selection is collapsed:
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nsCOMPtr<nsISelection> selection;
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nsresult res = GetSelection(getter_AddRefs(selection));
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if (NS_FAILED(res)) return res;
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if (!selection) return NS_ERROR_NULL_POINTER;
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nsTextRulesInfo ruleInfo(aEnabled ?
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nsTextEditRules::kSetAbsolutePosition :
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nsTextEditRules::kRemoveAbsolutePosition);
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PRBool cancel, handled;
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res = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
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if (NS_FAILED(res) || cancel)
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return res;
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return mRules->DidDoAction(selection, &ruleInfo, res);
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}
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NS_IMETHODIMP
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nsHTMLEditor::GetAbsolutelyPositionedSelectionContainer(nsIDOMElement **_retval)
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{
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nsCOMPtr<nsIDOMElement> element;
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nsresult res = GetSelectionContainer(getter_AddRefs(element));
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if (NS_FAILED(res)) return res;
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nsAutoString positionStr;
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nsCOMPtr<nsIDOMNode> node = do_QueryInterface(element);
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nsCOMPtr<nsIDOMNode> resultNode;
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while (!resultNode && !nsEditor::NodeIsType(node, nsEditProperty::html)) {
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res = mHTMLCSSUtils->GetComputedProperty(node, nsEditProperty::cssPosition,
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positionStr);
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if (NS_FAILED(res)) return res;
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if (positionStr.EqualsLiteral("absolute"))
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resultNode = node;
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else {
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nsCOMPtr<nsIDOMNode> parentNode;
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res = node->GetParentNode(getter_AddRefs(parentNode));
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if (NS_FAILED(res)) return res;
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node.swap(parentNode);
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}
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}
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element = do_QueryInterface(resultNode );
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*_retval = element;
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NS_IF_ADDREF(*_retval);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::GetSelectionContainerAbsolutelyPositioned(PRBool *aIsSelectionContainerAbsolutelyPositioned)
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{
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*aIsSelectionContainerAbsolutelyPositioned = (mAbsolutelyPositionedObject != nsnull);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::GetAbsolutePositioningEnabled(PRBool * aIsEnabled)
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{
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*aIsEnabled = mIsAbsolutelyPositioningEnabled;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::SetAbsolutePositioningEnabled(PRBool aIsEnabled)
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{
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mIsAbsolutelyPositioningEnabled = aIsEnabled;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::RelativeChangeElementZIndex(nsIDOMElement * aElement,
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PRInt32 aChange,
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PRInt32 * aReturn)
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{
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NS_ENSURE_ARG_POINTER(aElement);
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NS_ENSURE_ARG_POINTER(aReturn);
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if (!aChange) // early way out, no change
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return NS_OK;
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PRInt32 zIndex;
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nsresult res = GetElementZIndex(aElement, &zIndex);
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if (NS_FAILED(res)) return res;
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zIndex = PR_MAX(zIndex + aChange, 0);
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SetElementZIndex(aElement, zIndex);
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*aReturn = zIndex;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::SetElementZIndex(nsIDOMElement * aElement,
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PRInt32 aZindex)
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{
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NS_ENSURE_ARG_POINTER(aElement);
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nsAutoString zIndexStr;
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zIndexStr.AppendInt(aZindex);
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mHTMLCSSUtils->SetCSSProperty(aElement,
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nsEditProperty::cssZIndex,
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zIndexStr,
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PR_FALSE);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::RelativeChangeZIndex(PRInt32 aChange)
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{
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nsAutoEditBatch beginBatching(this);
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nsAutoRules beginRulesSniffing(this,
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(aChange < 0) ? kOpDecreaseZIndex :
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kOpIncreaseZIndex,
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nsIEditor::eNext);
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// brade: can we get rid of this comment?
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// Find out if the selection is collapsed:
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nsCOMPtr<nsISelection> selection;
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nsresult res = GetSelection(getter_AddRefs(selection));
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if (NS_FAILED(res)) return res;
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if (!selection) return NS_ERROR_NULL_POINTER;
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nsTextRulesInfo ruleInfo((aChange < 0) ? nsTextEditRules::kDecreaseZIndex:
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nsTextEditRules::kIncreaseZIndex);
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PRBool cancel, handled;
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res = mRules->WillDoAction(selection, &ruleInfo, &cancel, &handled);
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if (cancel || NS_FAILED(res))
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return res;
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return mRules->DidDoAction(selection, &ruleInfo, res);
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}
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NS_IMETHODIMP
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nsHTMLEditor::GetElementZIndex(nsIDOMElement * aElement,
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PRInt32 * aZindex)
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{
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nsAutoString zIndexStr;
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*aZindex = 0;
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nsresult res = mHTMLCSSUtils->GetSpecifiedProperty(aElement,
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nsEditProperty::cssZIndex,
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zIndexStr);
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if (NS_FAILED(res)) return res;
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if (zIndexStr.EqualsLiteral("auto")) {
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// we have to look at the positioned ancestors
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// cf. CSS 2 spec section 9.9.1
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nsCOMPtr<nsIDOMNode> parentNode;
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res = aElement->GetParentNode(getter_AddRefs(parentNode));
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if (NS_FAILED(res)) return res;
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nsCOMPtr<nsIDOMNode> node = parentNode;
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nsAutoString positionStr;
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while (node &&
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zIndexStr.EqualsLiteral("auto") &&
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!nsTextEditUtils::IsBody(node)) {
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res = mHTMLCSSUtils->GetComputedProperty(node,
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nsEditProperty::cssPosition,
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positionStr);
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if (NS_FAILED(res)) return res;
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if (positionStr.EqualsLiteral("absolute")) {
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// ah, we found one, what's its z-index ? If its z-index is auto,
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// we have to continue climbing the document's tree
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res = mHTMLCSSUtils->GetComputedProperty(node,
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nsEditProperty::cssZIndex,
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zIndexStr);
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if (NS_FAILED(res)) return res;
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}
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res = node->GetParentNode(getter_AddRefs(parentNode));
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if (NS_FAILED(res)) return res;
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node = parentNode;
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}
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}
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if (!zIndexStr.EqualsLiteral("auto")) {
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PRInt32 errorCode;
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*aZindex = zIndexStr.ToInteger(&errorCode);
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}
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return NS_OK;
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}
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nsresult
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nsHTMLEditor::CreateGrabber(nsIDOMNode * aParentNode, nsIDOMElement ** aReturn)
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{
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// let's create a grabber through the element factory
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nsresult res = CreateAnonymousElement(NS_LITERAL_STRING("span"),
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aParentNode,
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NS_LITERAL_STRING("mozGrabber"),
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PR_FALSE,
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aReturn);
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if (!*aReturn)
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return NS_ERROR_FAILURE;
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// add the mouse listener so we can detect a click on a resizer
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nsCOMPtr<nsIDOMEventTarget> evtTarget(do_QueryInterface(*aReturn));
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evtTarget->AddEventListener(NS_LITERAL_STRING("mousedown"), mMouseListenerP, PR_FALSE);
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return res;
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}
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NS_IMETHODIMP
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nsHTMLEditor::RefreshGrabber()
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{
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NS_ENSURE_TRUE(mAbsolutelyPositionedObject, NS_ERROR_NULL_POINTER);
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nsresult res = GetPositionAndDimensions(mAbsolutelyPositionedObject,
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mPositionedObjectX,
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mPositionedObjectY,
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mPositionedObjectWidth,
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mPositionedObjectHeight,
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mPositionedObjectBorderLeft,
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mPositionedObjectBorderTop,
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mPositionedObjectMarginLeft,
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mPositionedObjectMarginTop);
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if (NS_FAILED(res)) return res;
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SetAnonymousElementPosition(mPositionedObjectX+12,
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mPositionedObjectY-14,
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mGrabber);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::HideGrabber()
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{
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nsresult res =
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mAbsolutelyPositionedObject->RemoveAttribute(NS_LITERAL_STRING("_moz_abspos"));
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if (NS_FAILED(res)) return res;
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mAbsolutelyPositionedObject = nsnull;
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NS_ENSURE_TRUE(mGrabber, NS_ERROR_NULL_POINTER);
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// get the presshell's document observer interface.
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nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
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if (!ps) return NS_ERROR_NOT_INITIALIZED;
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nsCOMPtr<nsIDOMNode> parentNode;
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res = mGrabber->GetParentNode(getter_AddRefs(parentNode));
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NS_ENSURE_SUCCESS(res, res);
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nsCOMPtr<nsIContent> parentContent = do_QueryInterface(parentNode);
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if (!parentContent) return NS_ERROR_NULL_POINTER;
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DeleteRefToAnonymousNode(mGrabber, parentContent, ps);
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mGrabber = nsnull;
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DeleteRefToAnonymousNode(mPositioningShadow, parentContent, ps);
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mPositioningShadow = nsnull;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLEditor::ShowGrabberOnElement(nsIDOMElement * aElement)
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{
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NS_ENSURE_ARG_POINTER(aElement);
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if (mGrabber) {
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NS_ERROR("call HideGrabber first");
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return NS_ERROR_UNEXPECTED;
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}
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nsAutoString classValue;
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nsresult res = CheckPositionedElementBGandFG(aElement, classValue);
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if (NS_FAILED(res)) return res;
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res = aElement->SetAttribute(NS_LITERAL_STRING("_moz_abspos"),
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classValue);
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if (NS_FAILED(res)) return res;
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// first, let's keep track of that element...
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mAbsolutelyPositionedObject = aElement;
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nsCOMPtr<nsIDOMNode> parentNode;
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res = aElement->GetParentNode(getter_AddRefs(parentNode));
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NS_ENSURE_SUCCESS(res, res);
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res = CreateGrabber(parentNode, getter_AddRefs(mGrabber));
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NS_ENSURE_SUCCESS(res, res);
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// and set its position
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return RefreshGrabber();
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}
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nsresult
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nsHTMLEditor::StartMoving(nsIDOMElement *aHandle)
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{
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nsCOMPtr<nsIDOMNode> parentNode;
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nsresult res = mGrabber->GetParentNode(getter_AddRefs(parentNode));
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NS_ENSURE_SUCCESS(res, res);
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// now, let's create the resizing shadow
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res = CreateShadow(getter_AddRefs(mPositioningShadow),
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parentNode, mAbsolutelyPositionedObject);
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NS_ENSURE_SUCCESS(res,res);
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res = SetShadowPosition(mPositioningShadow, mAbsolutelyPositionedObject,
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mPositionedObjectX, mPositionedObjectY);
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NS_ENSURE_SUCCESS(res,res);
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// make the shadow appear
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mPositioningShadow->RemoveAttribute(NS_LITERAL_STRING("class"));
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// position it
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mHTMLCSSUtils->SetCSSPropertyPixels(mPositioningShadow,
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NS_LITERAL_STRING("width"),
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mPositionedObjectWidth);
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mHTMLCSSUtils->SetCSSPropertyPixels(mPositioningShadow,
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NS_LITERAL_STRING("height"),
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mPositionedObjectHeight);
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mIsMoving = PR_TRUE;
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return res;
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}
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void
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nsHTMLEditor::SnapToGrid(PRInt32 & newX, PRInt32 & newY)
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{
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if (mSnapToGridEnabled && mGridSize) {
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newX = (PRInt32) floor( ((float)newX / (float)mGridSize) + 0.5f ) * mGridSize;
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newY = (PRInt32) floor( ((float)newY / (float)mGridSize) + 0.5f ) * mGridSize;
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}
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}
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nsresult
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nsHTMLEditor::GrabberClicked()
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{
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// add a mouse move listener to the editor
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nsresult res = NS_OK;
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if (!mMouseMotionListenerP) {
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mMouseMotionListenerP = new ResizerMouseMotionListener(this);
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if (!mMouseMotionListenerP) {return NS_ERROR_NULL_POINTER;}
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nsCOMPtr<nsPIDOMEventTarget> piTarget = GetPIDOMEventTarget();
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NS_ENSURE_TRUE(piTarget, NS_ERROR_FAILURE);
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res = piTarget->AddEventListenerByIID(mMouseMotionListenerP,
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NS_GET_IID(nsIDOMMouseMotionListener));
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NS_ASSERTION(NS_SUCCEEDED(res),
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"failed to register mouse motion listener");
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}
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mGrabberClicked = PR_TRUE;
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return res;
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}
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nsresult
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nsHTMLEditor::EndMoving()
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{
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if (mPositioningShadow) {
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nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
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if (!ps) return NS_ERROR_NOT_INITIALIZED;
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nsCOMPtr<nsIDOMNode> parentNode;
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nsresult res = mGrabber->GetParentNode(getter_AddRefs(parentNode));
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NS_ENSURE_SUCCESS(res, res);
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nsCOMPtr<nsIContent> parentContent( do_QueryInterface(parentNode) );
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if (!parentContent) return NS_ERROR_FAILURE;
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DeleteRefToAnonymousNode(mPositioningShadow, parentContent, ps);
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mPositioningShadow = nsnull;
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}
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nsCOMPtr<nsPIDOMEventTarget> piTarget = GetPIDOMEventTarget();
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if (piTarget && mMouseMotionListenerP) {
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#ifdef DEBUG
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nsresult res =
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#endif
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piTarget->RemoveEventListenerByIID(mMouseMotionListenerP,
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NS_GET_IID(nsIDOMMouseMotionListener));
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NS_ASSERTION(NS_SUCCEEDED(res), "failed to remove mouse motion listener");
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}
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mMouseMotionListenerP = nsnull;
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mGrabberClicked = PR_FALSE;
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mIsMoving = PR_FALSE;
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nsCOMPtr<nsISelection> selection;
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GetSelection(getter_AddRefs(selection));
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if (!selection) {
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return NS_ERROR_NOT_INITIALIZED;
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}
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return CheckSelectionStateForAnonymousButtons(selection);
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}
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nsresult
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nsHTMLEditor::SetFinalPosition(PRInt32 aX, PRInt32 aY)
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{
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nsresult res = EndMoving();
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if (NS_FAILED(res)) return res;
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// we have now to set the new width and height of the resized object
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// we don't set the x and y position because we don't control that in
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// a normal HTML layout
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PRInt32 newX = mPositionedObjectX + aX - mOriginalX - (mPositionedObjectBorderLeft+mPositionedObjectMarginLeft);
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PRInt32 newY = mPositionedObjectY + aY - mOriginalY - (mPositionedObjectBorderTop+mPositionedObjectMarginTop);
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SnapToGrid(newX, newY);
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nsAutoString x, y;
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x.AppendInt(newX);
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y.AppendInt(newY);
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// we want one transaction only from a user's point of view
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nsAutoEditBatch batchIt(this);
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mHTMLCSSUtils->SetCSSPropertyPixels(mAbsolutelyPositionedObject,
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nsEditProperty::cssTop,
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newY,
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PR_FALSE);
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mHTMLCSSUtils->SetCSSPropertyPixels(mAbsolutelyPositionedObject,
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nsEditProperty::cssLeft,
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newX,
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PR_FALSE);
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// keep track of that size
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mPositionedObjectX = newX;
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mPositionedObjectY = newY;
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return RefreshResizers();
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}
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void
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nsHTMLEditor::AddPositioningOffet(PRInt32 & aX, PRInt32 & aY)
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{
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// Get the positioning offset
|
|
nsresult res;
|
|
nsCOMPtr<nsIPrefBranch> prefBranch =
|
|
do_GetService(NS_PREFSERVICE_CONTRACTID, &res);
|
|
PRInt32 positioningOffset = 0;
|
|
if (NS_SUCCEEDED(res) && prefBranch) {
|
|
res = prefBranch->GetIntPref("editor.positioning.offset", &positioningOffset);
|
|
if (NS_FAILED(res)) // paranoia
|
|
positioningOffset = 0;
|
|
}
|
|
|
|
aX += positioningOffset;
|
|
aY += positioningOffset;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLEditor::AbsolutelyPositionElement(nsIDOMElement * aElement,
|
|
PRBool aEnabled)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aElement);
|
|
|
|
nsAutoString positionStr;
|
|
mHTMLCSSUtils->GetComputedProperty(aElement, nsEditProperty::cssPosition,
|
|
positionStr);
|
|
PRBool isPositioned = (positionStr.EqualsLiteral("absolute"));
|
|
|
|
// nothing to do if the element is already in the state we want
|
|
if (isPositioned == aEnabled)
|
|
return NS_OK;
|
|
|
|
nsAutoEditBatch batchIt(this);
|
|
nsresult res;
|
|
|
|
if (aEnabled) {
|
|
PRInt32 x, y;
|
|
GetElementOrigin(aElement, x, y);
|
|
|
|
mHTMLCSSUtils->SetCSSProperty(aElement,
|
|
nsEditProperty::cssPosition,
|
|
NS_LITERAL_STRING("absolute"),
|
|
PR_FALSE);
|
|
|
|
AddPositioningOffet(x, y);
|
|
SnapToGrid(x, y);
|
|
SetElementPosition(aElement, x, y);
|
|
|
|
// we may need to create a br if the positioned element is alone in its
|
|
// container
|
|
nsCOMPtr<nsIDOMNode> parentNode;
|
|
res = aElement->GetParentNode(getter_AddRefs(parentNode));
|
|
if (NS_FAILED(res)) return res;
|
|
|
|
nsCOMPtr<nsIDOMNodeList> childNodes;
|
|
res = parentNode->GetChildNodes(getter_AddRefs(childNodes));
|
|
if (NS_FAILED(res)) return res;
|
|
if (!childNodes) return NS_ERROR_NULL_POINTER;
|
|
PRUint32 childCount;
|
|
res = childNodes->GetLength(&childCount);
|
|
if (NS_FAILED(res)) return res;
|
|
|
|
if (childCount == 1) {
|
|
nsCOMPtr<nsIDOMNode> brNode;
|
|
res = CreateBR(parentNode, 0, address_of(brNode));
|
|
}
|
|
}
|
|
else {
|
|
mHTMLCSSUtils->RemoveCSSProperty(aElement,
|
|
nsEditProperty::cssPosition,
|
|
EmptyString(), PR_FALSE);
|
|
mHTMLCSSUtils->RemoveCSSProperty(aElement,
|
|
nsEditProperty::cssTop,
|
|
EmptyString(), PR_FALSE);
|
|
mHTMLCSSUtils->RemoveCSSProperty(aElement,
|
|
nsEditProperty::cssLeft,
|
|
EmptyString(), PR_FALSE);
|
|
mHTMLCSSUtils->RemoveCSSProperty(aElement,
|
|
nsEditProperty::cssZIndex,
|
|
EmptyString(), PR_FALSE);
|
|
|
|
if (!nsHTMLEditUtils::IsImage(aElement)) {
|
|
mHTMLCSSUtils->RemoveCSSProperty(aElement,
|
|
nsEditProperty::cssWidth,
|
|
EmptyString(), PR_FALSE);
|
|
mHTMLCSSUtils->RemoveCSSProperty(aElement,
|
|
nsEditProperty::cssHeight,
|
|
EmptyString(), PR_FALSE);
|
|
}
|
|
|
|
PRBool hasStyleOrIdOrClass;
|
|
res = HasStyleOrIdOrClass(aElement, &hasStyleOrIdOrClass);
|
|
if (NS_FAILED(res)) return res;
|
|
if (!hasStyleOrIdOrClass && nsHTMLEditUtils::IsDiv(aElement)) {
|
|
nsCOMPtr<nsIHTMLEditRules> htmlRules = do_QueryInterface(mRules);
|
|
if (!htmlRules) return NS_ERROR_FAILURE;
|
|
res = htmlRules->MakeSureElemStartsOrEndsOnCR(aElement);
|
|
if (NS_FAILED(res)) return res;
|
|
res = RemoveContainer(aElement);
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLEditor::SetSnapToGridEnabled(PRBool aEnabled)
|
|
{
|
|
mSnapToGridEnabled = aEnabled;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLEditor::GetSnapToGridEnabled(PRBool * aIsEnabled)
|
|
{
|
|
*aIsEnabled = mSnapToGridEnabled;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLEditor::SetGridSize(PRUint32 aSize)
|
|
{
|
|
mGridSize = aSize;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLEditor::GetGridSize(PRUint32 * aSize)
|
|
{
|
|
*aSize = mGridSize;
|
|
return NS_OK;
|
|
}
|
|
|
|
// self-explanatory
|
|
NS_IMETHODIMP
|
|
nsHTMLEditor::SetElementPosition(nsIDOMElement *aElement, PRInt32 aX, PRInt32 aY)
|
|
{
|
|
nsAutoEditBatch batchIt(this);
|
|
|
|
mHTMLCSSUtils->SetCSSPropertyPixels(aElement,
|
|
nsEditProperty::cssLeft,
|
|
aX,
|
|
PR_FALSE);
|
|
mHTMLCSSUtils->SetCSSPropertyPixels(aElement,
|
|
nsEditProperty::cssTop,
|
|
aY,
|
|
PR_FALSE);
|
|
return NS_OK;
|
|
}
|
|
|
|
// self-explanatory
|
|
NS_IMETHODIMP
|
|
nsHTMLEditor::GetPositionedElement(nsIDOMElement ** aReturn)
|
|
{
|
|
*aReturn = mAbsolutelyPositionedObject;
|
|
NS_IF_ADDREF(*aReturn);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsHTMLEditor::CheckPositionedElementBGandFG(nsIDOMElement * aElement,
|
|
nsAString & aReturn)
|
|
{
|
|
// we are going to outline the positioned element and bring it to the
|
|
// front to overlap any other element intersecting with it. But
|
|
// first, let's see what's the background and foreground colors of the
|
|
// positioned element.
|
|
// if background-image computed value is 'none,
|
|
// If the background color is 'auto' and R G B values of the foreground are
|
|
// each above #d0, use a black background
|
|
// If the background color is 'auto' and at least one of R G B values of
|
|
// the foreground is below #d0, use a white background
|
|
// Otherwise don't change background/foreground
|
|
|
|
aReturn.Truncate();
|
|
|
|
nsAutoString bgImageStr;
|
|
nsresult res =
|
|
mHTMLCSSUtils->GetComputedProperty(aElement,
|
|
nsEditProperty::cssBackgroundImage,
|
|
bgImageStr);
|
|
if (NS_FAILED(res)) return res;
|
|
if (bgImageStr.EqualsLiteral("none")) {
|
|
nsAutoString bgColorStr;
|
|
res =
|
|
mHTMLCSSUtils->GetComputedProperty(aElement,
|
|
nsEditProperty::cssBackgroundColor,
|
|
bgColorStr);
|
|
if (NS_FAILED(res)) return res;
|
|
if (bgColorStr.EqualsLiteral("transparent")) {
|
|
|
|
nsCOMPtr<nsIDOMViewCSS> viewCSS;
|
|
res = mHTMLCSSUtils->GetDefaultViewCSS(aElement, getter_AddRefs(viewCSS));
|
|
if (NS_FAILED(res)) return res;
|
|
nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
|
|
res = viewCSS->GetComputedStyle(aElement, EmptyString(), getter_AddRefs(cssDecl));
|
|
if (NS_FAILED(res)) return res;
|
|
// from these declarations, get the one we want and that one only
|
|
nsCOMPtr<nsIDOMCSSValue> colorCssValue;
|
|
res = cssDecl->GetPropertyCSSValue(NS_LITERAL_STRING("color"), getter_AddRefs(colorCssValue));
|
|
if (NS_FAILED(res)) return res;
|
|
|
|
PRUint16 type;
|
|
res = colorCssValue->GetCssValueType(&type);
|
|
if (NS_FAILED(res)) return res;
|
|
if (nsIDOMCSSValue::CSS_PRIMITIVE_VALUE == type) {
|
|
nsCOMPtr<nsIDOMCSSPrimitiveValue> val = do_QueryInterface(colorCssValue);
|
|
res = val->GetPrimitiveType(&type);
|
|
if (NS_FAILED(res)) return res;
|
|
if (nsIDOMCSSPrimitiveValue::CSS_RGBCOLOR == type) {
|
|
nsCOMPtr<nsIDOMRGBColor> rgbColor;
|
|
res = val->GetRGBColorValue(getter_AddRefs(rgbColor));
|
|
if (NS_FAILED(res)) return res;
|
|
nsCOMPtr<nsIDOMCSSPrimitiveValue> red, green, blue;
|
|
float r, g, b;
|
|
res = rgbColor->GetRed(getter_AddRefs(red));
|
|
if (NS_FAILED(res)) return res;
|
|
res = rgbColor->GetGreen(getter_AddRefs(green));
|
|
if (NS_FAILED(res)) return res;
|
|
res = rgbColor->GetBlue(getter_AddRefs(blue));
|
|
if (NS_FAILED(res)) return res;
|
|
res = red->GetFloatValue(nsIDOMCSSPrimitiveValue::CSS_NUMBER, &r);
|
|
if (NS_FAILED(res)) return res;
|
|
res = green->GetFloatValue(nsIDOMCSSPrimitiveValue::CSS_NUMBER, &g);
|
|
if (NS_FAILED(res)) return res;
|
|
res = blue->GetFloatValue(nsIDOMCSSPrimitiveValue::CSS_NUMBER, &b);
|
|
if (NS_FAILED(res)) return res;
|
|
if (r >= BLACK_BG_RGB_TRIGGER &&
|
|
g >= BLACK_BG_RGB_TRIGGER &&
|
|
b >= BLACK_BG_RGB_TRIGGER)
|
|
aReturn.AssignLiteral("black");
|
|
else
|
|
aReturn.AssignLiteral("white");
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|