forked from mirrors/gecko-dev
1037 lines
26 KiB
C++
1037 lines
26 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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* Mats Palmgren <mats.palmgren@bredband.net>
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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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/* code for HTML client-side image maps */
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#include "nsImageMap.h"
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#include "nsString.h"
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#include "nsReadableUtils.h"
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#include "nsIRenderingContext.h"
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#include "nsPresContext.h"
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#include "nsIURL.h"
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#include "nsIURL.h"
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#include "nsIServiceManager.h"
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#include "nsNetUtil.h"
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#include "nsTextFragment.h"
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#include "nsIContent.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsIDOMHTMLMapElement.h"
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#include "nsIDOMHTMLAreaElement.h"
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#include "nsIDOMHTMLAnchorElement.h"
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#include "nsIDOMHTMLCollection.h"
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#include "nsIDocument.h"
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#include "nsINameSpaceManager.h"
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#include "nsGkAtoms.h"
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#include "nsIDOMEventTarget.h"
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#include "nsIPresShell.h"
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#include "nsIFrame.h"
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#include "nsFrameManager.h"
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#include "nsCoord.h"
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#include "nsIImageMap.h"
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#include "nsIConsoleService.h"
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#include "nsIScriptError.h"
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#include "nsIStringBundle.h"
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#include "nsIDocument.h"
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#include "nsContentUtils.h"
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static NS_DEFINE_CID(kCStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
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class Area {
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public:
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Area(nsIContent* aArea);
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virtual ~Area();
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virtual void ParseCoords(const nsAString& aSpec);
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virtual PRBool IsInside(nscoord x, nscoord y) const = 0;
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virtual void Draw(nsPresContext* aCX,
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nsIRenderingContext& aRC) = 0;
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virtual void GetRect(nsPresContext* aCX, nsRect& aRect) = 0;
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void HasFocus(PRBool aHasFocus);
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void GetHREF(nsAString& aHref) const;
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void GetArea(nsIContent** aArea) const;
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nsCOMPtr<nsIContent> mArea;
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nscoord* mCoords;
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PRInt32 mNumCoords;
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PRPackedBool mHasFocus;
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};
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Area::Area(nsIContent* aArea)
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: mArea(aArea)
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{
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MOZ_COUNT_CTOR(Area);
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mCoords = nsnull;
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mNumCoords = 0;
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mHasFocus = PR_FALSE;
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}
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Area::~Area()
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{
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MOZ_COUNT_DTOR(Area);
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delete [] mCoords;
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}
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void
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Area::GetHREF(nsAString& aHref) const
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{
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aHref.Truncate();
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if (mArea) {
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mArea->GetAttr(kNameSpaceID_None, nsGkAtoms::href, aHref);
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}
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}
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void
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Area::GetArea(nsIContent** aArea) const
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{
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*aArea = mArea;
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NS_IF_ADDREF(*aArea);
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}
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#include <stdlib.h>
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inline PRBool
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is_space(char c)
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{
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return (c == ' ' ||
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c == '\f' ||
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c == '\n' ||
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c == '\r' ||
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c == '\t' ||
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c == '\v');
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}
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static void logMessage(nsIContent* aContent,
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const nsAString& aCoordsSpec,
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PRInt32 aFlags,
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const char* aMessageName) {
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nsIURI* documentURI = nsnull;
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nsIDocument* doc = aContent->GetOwnerDoc();
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if (doc) {
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documentURI = doc->GetDocumentURI();
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}
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nsContentUtils::ReportToConsole(
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nsContentUtils::eLAYOUT_PROPERTIES,
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aMessageName,
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nsnull, /* params */
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0, /* params length */
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documentURI,
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PromiseFlatString(NS_LITERAL_STRING("coords=\"") +
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aCoordsSpec +
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NS_LITERAL_STRING("\"")), /* source line */
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0, /* line number */
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0, /* column number */
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aFlags,
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"ImageMap");
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}
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// XXX straight copy from laymap.c
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static nscoord* lo_parse_coord_list(char *str, PRInt32* value_cnt)
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{
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char *tptr;
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char *n_str;
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PRInt32 i, cnt;
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PRInt32 *value_list;
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/*
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* Nothing in an empty list
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*/
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*value_cnt = 0;
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if (!str || *str == '\0')
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{
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return nsnull;
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}
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/*
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* Skip beginning whitespace, all whitespace is empty list.
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*/
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n_str = str;
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while (is_space(*n_str))
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{
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n_str++;
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}
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if (*n_str == '\0')
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{
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return nsnull;
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}
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/*
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* Make a pass where any two numbers separated by just whitespace
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* are given a comma separator. Count entries while passing.
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*/
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cnt = 0;
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while (*n_str != '\0')
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{
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PRBool has_comma;
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/*
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* Skip to a separator
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*/
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tptr = n_str;
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while (!is_space(*tptr) && *tptr != ',' && *tptr != '\0')
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{
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tptr++;
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}
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n_str = tptr;
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/*
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* If no more entries, break out here
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*/
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if (*n_str == '\0')
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{
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break;
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}
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/*
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* Skip to the end of the separator, noting if we have a
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* comma.
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*/
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has_comma = PR_FALSE;
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while (is_space(*tptr) || *tptr == ',')
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{
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if (*tptr == ',')
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{
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if (has_comma == PR_FALSE)
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{
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has_comma = PR_TRUE;
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}
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else
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{
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break;
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}
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}
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tptr++;
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}
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/*
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* If this was trailing whitespace we skipped, we are done.
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*/
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if ((*tptr == '\0')&&(has_comma == PR_FALSE))
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{
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break;
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}
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/*
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* Else if the separator is all whitespace, and this is not the
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* end of the string, add a comma to the separator.
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*/
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else if (has_comma == PR_FALSE)
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{
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*n_str = ',';
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}
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/*
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* count the entry skipped.
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*/
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cnt++;
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n_str = tptr;
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}
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/*
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* count the last entry in the list.
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*/
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cnt++;
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/*
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* Allocate space for the coordinate array.
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*/
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value_list = new nscoord[cnt];
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if (!value_list)
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{
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return nsnull;
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}
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/*
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* Second pass to copy integer values into list.
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*/
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tptr = str;
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for (i=0; i<cnt; i++)
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{
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char *ptr;
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ptr = strchr(tptr, ',');
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if (ptr)
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{
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*ptr = '\0';
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}
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/*
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* Strip whitespace in front of number because I don't
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* trust atoi to do it on all platforms.
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*/
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while (is_space(*tptr))
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{
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tptr++;
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}
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if (*tptr == '\0')
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{
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value_list[i] = 0;
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}
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else
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{
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value_list[i] = (nscoord) ::atoi(tptr);
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}
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if (ptr)
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{
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*ptr = ',';
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tptr = ptr + 1;
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}
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}
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*value_cnt = cnt;
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return value_list;
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}
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void Area::ParseCoords(const nsAString& aSpec)
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{
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char* cp = ToNewCString(aSpec);
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if (cp) {
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mCoords = lo_parse_coord_list(cp, &mNumCoords);
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NS_Free(cp);
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}
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}
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void Area::HasFocus(PRBool aHasFocus)
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{
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mHasFocus = aHasFocus;
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}
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//----------------------------------------------------------------------
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class DefaultArea : public Area {
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public:
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DefaultArea(nsIContent* aArea);
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virtual PRBool IsInside(nscoord x, nscoord y) const;
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virtual void Draw(nsPresContext* aCX,
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nsIRenderingContext& aRC);
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virtual void GetRect(nsPresContext* aCX, nsRect& aRect);
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};
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DefaultArea::DefaultArea(nsIContent* aArea)
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: Area(aArea)
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{
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}
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PRBool DefaultArea::IsInside(nscoord x, nscoord y) const
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{
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return PR_TRUE;
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}
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void DefaultArea::Draw(nsPresContext* aCX, nsIRenderingContext& aRC)
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{
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}
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void DefaultArea::GetRect(nsPresContext* aCX, nsRect& aRect)
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{
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}
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//----------------------------------------------------------------------
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class RectArea : public Area {
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public:
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RectArea(nsIContent* aArea);
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virtual void ParseCoords(const nsAString& aSpec);
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virtual PRBool IsInside(nscoord x, nscoord y) const;
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virtual void Draw(nsPresContext* aCX,
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nsIRenderingContext& aRC);
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virtual void GetRect(nsPresContext* aCX, nsRect& aRect);
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};
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RectArea::RectArea(nsIContent* aArea)
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: Area(aArea)
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{
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}
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void RectArea::ParseCoords(const nsAString& aSpec)
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{
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Area::ParseCoords(aSpec);
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PRBool saneRect = PR_TRUE;
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PRInt32 flag = nsIScriptError::warningFlag;
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if (mNumCoords >= 4) {
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if (mCoords[0] > mCoords[2]) {
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// x-coords in reversed order
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nscoord x = mCoords[2];
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mCoords[2] = mCoords[0];
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mCoords[0] = x;
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saneRect = PR_FALSE;
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}
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if (mCoords[1] > mCoords[3]) {
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// y-coords in reversed order
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nscoord y = mCoords[3];
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mCoords[3] = mCoords[1];
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mCoords[1] = y;
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saneRect = PR_FALSE;
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}
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if (mNumCoords > 4) {
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// Someone missed the concept of a rect here
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saneRect = PR_FALSE;
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}
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} else {
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saneRect = PR_FALSE;
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flag = nsIScriptError::errorFlag;
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}
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if (!saneRect) {
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logMessage(mArea, aSpec, flag, "ImageMapRectBoundsError");
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}
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}
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PRBool RectArea::IsInside(nscoord x, nscoord y) const
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{
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if (mNumCoords >= 4) { // Note: > is for nav compatability
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nscoord x1 = mCoords[0];
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nscoord y1 = mCoords[1];
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nscoord x2 = mCoords[2];
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nscoord y2 = mCoords[3];
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NS_ASSERTION(x1 <= x2 && y1 <= y2,
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"Someone screwed up RectArea::ParseCoords");
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if ((x >= x1) && (x <= x2) && (y >= y1) && (y <= y2)) {
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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void RectArea::Draw(nsPresContext* aCX, nsIRenderingContext& aRC)
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{
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if (mHasFocus) {
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if (mNumCoords >= 4) {
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nscoord x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
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nscoord y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
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nscoord x2 = nsPresContext::CSSPixelsToAppUnits(mCoords[2]);
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nscoord y2 = nsPresContext::CSSPixelsToAppUnits(mCoords[3]);
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NS_ASSERTION(x1 <= x2 && y1 <= y2,
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"Someone screwed up RectArea::ParseCoords");
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aRC.DrawLine(x1, y1, x1, y2);
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aRC.DrawLine(x1, y2, x2, y2);
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aRC.DrawLine(x1, y1, x2, y1);
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aRC.DrawLine(x2, y1, x2, y2);
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}
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}
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}
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void RectArea::GetRect(nsPresContext* aCX, nsRect& aRect)
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{
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if (mNumCoords >= 4) {
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nscoord x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
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nscoord y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
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nscoord x2 = nsPresContext::CSSPixelsToAppUnits(mCoords[2]);
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nscoord y2 = nsPresContext::CSSPixelsToAppUnits(mCoords[3]);
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NS_ASSERTION(x1 <= x2 && y1 <= y2,
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"Someone screwed up RectArea::ParseCoords");
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aRect.SetRect(x1, y1, x2, y2);
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}
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}
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//----------------------------------------------------------------------
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class PolyArea : public Area {
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public:
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PolyArea(nsIContent* aArea);
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virtual void ParseCoords(const nsAString& aSpec);
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virtual PRBool IsInside(nscoord x, nscoord y) const;
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virtual void Draw(nsPresContext* aCX,
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nsIRenderingContext& aRC);
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virtual void GetRect(nsPresContext* aCX, nsRect& aRect);
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};
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PolyArea::PolyArea(nsIContent* aArea)
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: Area(aArea)
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{
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}
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void PolyArea::ParseCoords(const nsAString& aSpec)
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{
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Area::ParseCoords(aSpec);
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if (mNumCoords >= 2) {
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if (mNumCoords & 1U) {
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logMessage(mArea,
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aSpec,
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nsIScriptError::warningFlag,
|
|
"ImageMapPolyOddNumberOfCoords");
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}
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} else {
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logMessage(mArea,
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aSpec,
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nsIScriptError::errorFlag,
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"ImageMapPolyWrongNumberOfCoords");
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}
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}
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PRBool PolyArea::IsInside(nscoord x, nscoord y) const
|
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{
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if (mNumCoords >= 6) {
|
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PRInt32 intersects = 0;
|
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nscoord wherex = x;
|
|
nscoord wherey = y;
|
|
PRInt32 totalv = mNumCoords / 2;
|
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PRInt32 totalc = totalv * 2;
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nscoord xval = mCoords[totalc - 2];
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nscoord yval = mCoords[totalc - 1];
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PRInt32 end = totalc;
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PRInt32 pointer = 1;
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if ((yval >= wherey) != (mCoords[pointer] >= wherey))
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if ((xval >= wherex) == (mCoords[0] >= wherex))
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intersects += (xval >= wherex) ? 1 : 0;
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else
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intersects += ((xval - (yval - wherey) *
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(mCoords[0] - xval) /
|
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(mCoords[pointer] - yval)) >= wherex) ? 1 : 0;
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|
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// XXX I wonder what this is doing; this is a translation of ptinpoly.c
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while (pointer < end) {
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yval = mCoords[pointer];
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pointer += 2;
|
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if (yval >= wherey) {
|
|
while((pointer < end) && (mCoords[pointer] >= wherey))
|
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pointer+=2;
|
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if (pointer >= end)
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break;
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if ((mCoords[pointer-3] >= wherex) ==
|
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(mCoords[pointer-1] >= wherex)) {
|
|
intersects += (mCoords[pointer-3] >= wherex) ? 1 : 0;
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} else {
|
|
intersects +=
|
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((mCoords[pointer-3] - (mCoords[pointer-2] - wherey) *
|
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(mCoords[pointer-1] - mCoords[pointer-3]) /
|
|
(mCoords[pointer] - mCoords[pointer - 2])) >= wherex) ? 1:0;
|
|
}
|
|
} else {
|
|
while((pointer < end) && (mCoords[pointer] < wherey))
|
|
pointer+=2;
|
|
if (pointer >= end)
|
|
break;
|
|
if ((mCoords[pointer-3] >= wherex) ==
|
|
(mCoords[pointer-1] >= wherex)) {
|
|
intersects += (mCoords[pointer-3] >= wherex) ? 1:0;
|
|
} else {
|
|
intersects +=
|
|
((mCoords[pointer-3] - (mCoords[pointer-2] - wherey) *
|
|
(mCoords[pointer-1] - mCoords[pointer-3]) /
|
|
(mCoords[pointer] - mCoords[pointer - 2])) >= wherex) ? 1:0;
|
|
}
|
|
}
|
|
}
|
|
if ((intersects & 1) != 0) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
void PolyArea::Draw(nsPresContext* aCX, nsIRenderingContext& aRC)
|
|
{
|
|
if (mHasFocus) {
|
|
if (mNumCoords >= 6) {
|
|
nscoord x0 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
|
|
nscoord y0 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
|
|
nscoord x1, y1;
|
|
for (PRInt32 i = 2; i < mNumCoords; i += 2) {
|
|
x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[i]);
|
|
y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[i+1]);
|
|
aRC.DrawLine(x0, y0, x1, y1);
|
|
x0 = x1;
|
|
y0 = y1;
|
|
}
|
|
x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
|
|
y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
|
|
aRC.DrawLine(x0, y0, x1, y1);
|
|
}
|
|
}
|
|
}
|
|
|
|
void PolyArea::GetRect(nsPresContext* aCX, nsRect& aRect)
|
|
{
|
|
if (mNumCoords >= 6) {
|
|
nscoord x1, x2, y1, y2, xtmp, ytmp;
|
|
x1 = x2 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
|
|
y1 = y2 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
|
|
for (PRInt32 i = 2; i < mNumCoords; i += 2) {
|
|
xtmp = nsPresContext::CSSPixelsToAppUnits(mCoords[i]);
|
|
ytmp = nsPresContext::CSSPixelsToAppUnits(mCoords[i+1]);
|
|
x1 = x1 < xtmp ? x1 : xtmp;
|
|
y1 = y1 < ytmp ? y1 : ytmp;
|
|
x2 = x2 > xtmp ? x2 : xtmp;
|
|
y2 = y2 > ytmp ? y2 : ytmp;
|
|
}
|
|
|
|
aRect.SetRect(x1, y1, x2, y2);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
class CircleArea : public Area {
|
|
public:
|
|
CircleArea(nsIContent* aArea);
|
|
|
|
virtual void ParseCoords(const nsAString& aSpec);
|
|
virtual PRBool IsInside(nscoord x, nscoord y) const;
|
|
virtual void Draw(nsPresContext* aCX,
|
|
nsIRenderingContext& aRC);
|
|
virtual void GetRect(nsPresContext* aCX, nsRect& aRect);
|
|
};
|
|
|
|
CircleArea::CircleArea(nsIContent* aArea)
|
|
: Area(aArea)
|
|
{
|
|
}
|
|
|
|
void CircleArea::ParseCoords(const nsAString& aSpec)
|
|
{
|
|
Area::ParseCoords(aSpec);
|
|
|
|
PRBool wrongNumberOfCoords = PR_FALSE;
|
|
PRInt32 flag = nsIScriptError::warningFlag;
|
|
if (mNumCoords >= 3) {
|
|
if (mCoords[2] < 0) {
|
|
logMessage(mArea,
|
|
aSpec,
|
|
nsIScriptError::errorFlag,
|
|
"ImageMapCircleNegativeRadius");
|
|
}
|
|
|
|
if (mNumCoords > 3) {
|
|
wrongNumberOfCoords = PR_TRUE;
|
|
}
|
|
} else {
|
|
wrongNumberOfCoords = PR_TRUE;
|
|
flag = nsIScriptError::errorFlag;
|
|
}
|
|
|
|
if (wrongNumberOfCoords) {
|
|
logMessage(mArea,
|
|
aSpec,
|
|
flag,
|
|
"ImageMapCircleWrongNumberOfCoords");
|
|
}
|
|
}
|
|
|
|
PRBool CircleArea::IsInside(nscoord x, nscoord y) const
|
|
{
|
|
// Note: > is for nav compatability
|
|
if (mNumCoords >= 3) {
|
|
nscoord x1 = mCoords[0];
|
|
nscoord y1 = mCoords[1];
|
|
nscoord radius = mCoords[2];
|
|
if (radius < 0) {
|
|
return PR_FALSE;
|
|
}
|
|
nscoord dx = x1 - x;
|
|
nscoord dy = y1 - y;
|
|
nscoord dist = (dx * dx) + (dy * dy);
|
|
if (dist <= (radius * radius)) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
void CircleArea::Draw(nsPresContext* aCX, nsIRenderingContext& aRC)
|
|
{
|
|
if (mHasFocus) {
|
|
if (mNumCoords >= 3) {
|
|
nscoord x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
|
|
nscoord y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
|
|
nscoord radius = nsPresContext::CSSPixelsToAppUnits(mCoords[2]);
|
|
if (radius < 0) {
|
|
return;
|
|
}
|
|
nscoord x = x1 - radius;
|
|
nscoord y = y1 - radius;
|
|
nscoord w = 2 * radius;
|
|
aRC.DrawEllipse(x, y, w, w);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CircleArea::GetRect(nsPresContext* aCX, nsRect& aRect)
|
|
{
|
|
if (mNumCoords >= 3) {
|
|
nscoord x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
|
|
nscoord y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
|
|
nscoord radius = nsPresContext::CSSPixelsToAppUnits(mCoords[2]);
|
|
if (radius < 0) {
|
|
return;
|
|
}
|
|
|
|
aRect.SetRect(x1 - radius, y1 - radius, x1 + radius, y1 + radius);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
|
|
nsImageMap::nsImageMap() :
|
|
mPresShell(nsnull),
|
|
mImageFrame(nsnull),
|
|
mContainsBlockContents(PR_FALSE)
|
|
{
|
|
}
|
|
|
|
nsImageMap::~nsImageMap()
|
|
{
|
|
NS_ASSERTION(mAreas.Count() == 0, "Destroy was not called");
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS4(nsImageMap,
|
|
nsIMutationObserver,
|
|
nsIDOMFocusListener,
|
|
nsIDOMEventListener,
|
|
nsIImageMap)
|
|
|
|
NS_IMETHODIMP
|
|
nsImageMap::GetBoundsForAreaContent(nsIContent *aContent,
|
|
nsPresContext* aPresContext,
|
|
nsRect& aBounds)
|
|
{
|
|
// Find the Area struct associated with this content node, and return bounds
|
|
PRInt32 i, n = mAreas.Count();
|
|
for (i = 0; i < n; i++) {
|
|
Area* area = (Area*) mAreas.ElementAt(i);
|
|
if (area->mArea == aContent) {
|
|
area->GetRect(aPresContext, aBounds);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
void
|
|
nsImageMap::FreeAreas()
|
|
{
|
|
nsFrameManager *frameManager = mPresShell->FrameManager();
|
|
|
|
PRInt32 i, n = mAreas.Count();
|
|
for (i = 0; i < n; i++) {
|
|
Area* area = (Area*) mAreas.ElementAt(i);
|
|
frameManager->RemoveAsPrimaryFrame(area->mArea, mImageFrame);
|
|
|
|
nsCOMPtr<nsIContent> areaContent;
|
|
area->GetArea(getter_AddRefs(areaContent));
|
|
if (areaContent) {
|
|
areaContent->RemoveEventListenerByIID(this, NS_GET_IID(nsIDOMFocusListener));
|
|
}
|
|
delete area;
|
|
}
|
|
mAreas.Clear();
|
|
}
|
|
|
|
nsresult
|
|
nsImageMap::Init(nsIPresShell* aPresShell, nsIFrame* aImageFrame, nsIDOMHTMLMapElement* aMap)
|
|
{
|
|
NS_PRECONDITION(nsnull != aMap, "null ptr");
|
|
if (nsnull == aMap) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
mPresShell = aPresShell;
|
|
mImageFrame = aImageFrame;
|
|
|
|
mMap = do_QueryInterface(aMap);
|
|
NS_ASSERTION(mMap, "aMap is not an nsIContent!");
|
|
mMap->AddMutationObserver(this);
|
|
|
|
// "Compile" the areas in the map into faster access versions
|
|
return UpdateAreas();
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsImageMap::SearchForAreas(nsIContent* aParent, PRBool& aFoundArea,
|
|
PRBool& aFoundAnchor)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
PRUint32 i, n = aParent->GetChildCount();
|
|
|
|
// Look for <area> or <a> elements. We'll use whichever type we find first.
|
|
for (i = 0; i < n; i++) {
|
|
nsIContent *child = aParent->GetChildAt(i);
|
|
|
|
if (child->IsNodeOfType(nsINode::eHTML)) {
|
|
// If we haven't determined that the map element contains an
|
|
// <a> element yet, then look for <area>.
|
|
if (!aFoundAnchor && child->Tag() == nsGkAtoms::area) {
|
|
aFoundArea = PR_TRUE;
|
|
rv = AddArea(child);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Continue to next child. This stops mContainsBlockContents from
|
|
// getting set. It also makes us ignore children of <area>s which
|
|
// is consistent with how we react to dynamic insertion of such
|
|
// children.
|
|
continue;
|
|
}
|
|
// If we haven't determined that the map element contains an
|
|
// <area> element yet, then look for <a>.
|
|
if (!aFoundArea && child->Tag() == nsGkAtoms::a) {
|
|
aFoundAnchor = PR_TRUE;
|
|
rv = AddArea(child);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
|
|
if (child->IsNodeOfType(nsINode::eELEMENT)) {
|
|
mContainsBlockContents = PR_TRUE;
|
|
rv = SearchForAreas(child, aFoundArea, aFoundAnchor);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsImageMap::UpdateAreas()
|
|
{
|
|
// Get rid of old area data
|
|
FreeAreas();
|
|
|
|
PRBool foundArea = PR_FALSE;
|
|
PRBool foundAnchor = PR_FALSE;
|
|
mContainsBlockContents = PR_FALSE;
|
|
|
|
return SearchForAreas(mMap, foundArea, foundAnchor);
|
|
}
|
|
|
|
nsresult
|
|
nsImageMap::AddArea(nsIContent* aArea)
|
|
{
|
|
nsAutoString coords;
|
|
static nsIContent::AttrValuesArray strings[] =
|
|
{&nsGkAtoms::_empty, &nsGkAtoms::rect, &nsGkAtoms::rectangle,
|
|
&nsGkAtoms::poly, &nsGkAtoms::polygon, &nsGkAtoms::circle,
|
|
&nsGkAtoms::circ, &nsGkAtoms::_default, nsnull};
|
|
|
|
aArea->GetAttr(kNameSpaceID_None, nsGkAtoms::coords, coords);
|
|
|
|
Area* area;
|
|
switch (aArea->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::shape,
|
|
strings, eIgnoreCase)) {
|
|
case nsIContent::ATTR_MISSING:
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
area = new RectArea(aArea);
|
|
break;
|
|
case 3:
|
|
case 4:
|
|
area = new PolyArea(aArea);
|
|
break;
|
|
case 5:
|
|
case 6:
|
|
area = new CircleArea(aArea);
|
|
break;
|
|
case 7:
|
|
area = new DefaultArea(aArea);
|
|
break;
|
|
default:
|
|
// Unknown area type; bail
|
|
return NS_OK;
|
|
}
|
|
if (!area)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
//Add focus listener to track area focus changes
|
|
aArea->AddEventListenerByIID(this, NS_GET_IID(nsIDOMFocusListener));
|
|
|
|
mPresShell->FrameManager()->SetPrimaryFrameFor(aArea, mImageFrame);
|
|
aArea->SetMayHaveFrame(PR_TRUE);
|
|
NS_ASSERTION(aArea->MayHaveFrame(), "SetMayHaveFrame failed?");
|
|
|
|
area->ParseCoords(coords);
|
|
mAreas.AppendElement(area);
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsImageMap::IsInside(nscoord aX, nscoord aY,
|
|
nsIContent** aContent) const
|
|
{
|
|
NS_ASSERTION(mMap, "Not initialized");
|
|
PRInt32 i, n = mAreas.Count();
|
|
for (i = 0; i < n; i++) {
|
|
Area* area = (Area*) mAreas.ElementAt(i);
|
|
if (area->IsInside(aX, aY)) {
|
|
area->GetArea(aContent);
|
|
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
void
|
|
nsImageMap::Draw(nsPresContext* aCX, nsIRenderingContext& aRC)
|
|
{
|
|
PRInt32 i, n = mAreas.Count();
|
|
for (i = 0; i < n; i++) {
|
|
Area* area = (Area*) mAreas.ElementAt(i);
|
|
area->Draw(aCX, aRC);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsImageMap::MaybeUpdateAreas(nsIContent *aContent)
|
|
{
|
|
if (aContent == mMap || mContainsBlockContents) {
|
|
UpdateAreas();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsImageMap::AttributeChanged(nsIDocument* aDocument,
|
|
nsIContent* aContent,
|
|
PRInt32 aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aModType,
|
|
PRUint32 aStateMask)
|
|
{
|
|
// If the parent of the changing content node is our map then update
|
|
// the map. But only do this if the node is an HTML <area> or <a>
|
|
// and the attribute that's changing is "shape" or "coords" -- those
|
|
// are the only cases we care about.
|
|
if ((aContent->NodeInfo()->Equals(nsGkAtoms::area) ||
|
|
aContent->NodeInfo()->Equals(nsGkAtoms::a)) &&
|
|
aContent->IsNodeOfType(nsINode::eHTML) &&
|
|
aNameSpaceID == kNameSpaceID_None &&
|
|
(aAttribute == nsGkAtoms::shape ||
|
|
aAttribute == nsGkAtoms::coords)) {
|
|
MaybeUpdateAreas(aContent->GetParent());
|
|
}
|
|
}
|
|
|
|
void
|
|
nsImageMap::ContentAppended(nsIDocument *aDocument,
|
|
nsIContent* aContainer,
|
|
PRInt32 aNewIndexInContainer)
|
|
{
|
|
MaybeUpdateAreas(aContainer);
|
|
}
|
|
|
|
void
|
|
nsImageMap::ContentInserted(nsIDocument *aDocument,
|
|
nsIContent* aContainer,
|
|
nsIContent* aChild,
|
|
PRInt32 aIndexInContainer)
|
|
{
|
|
MaybeUpdateAreas(aContainer);
|
|
}
|
|
|
|
void
|
|
nsImageMap::ContentRemoved(nsIDocument *aDocument,
|
|
nsIContent* aContainer,
|
|
nsIContent* aChild,
|
|
PRInt32 aIndexInContainer)
|
|
{
|
|
MaybeUpdateAreas(aContainer);
|
|
}
|
|
|
|
nsresult
|
|
nsImageMap::Focus(nsIDOMEvent* aEvent)
|
|
{
|
|
return ChangeFocus(aEvent, PR_TRUE);
|
|
}
|
|
|
|
nsresult
|
|
nsImageMap::Blur(nsIDOMEvent* aEvent)
|
|
{
|
|
return ChangeFocus(aEvent, PR_FALSE);
|
|
}
|
|
|
|
nsresult
|
|
nsImageMap::ChangeFocus(nsIDOMEvent* aEvent, PRBool aFocus) {
|
|
//Set which one of our areas changed focus
|
|
nsCOMPtr<nsIDOMEventTarget> target;
|
|
if (NS_SUCCEEDED(aEvent->GetTarget(getter_AddRefs(target))) && target) {
|
|
nsCOMPtr<nsIContent> targetContent(do_QueryInterface(target));
|
|
if (targetContent) {
|
|
PRInt32 i, n = mAreas.Count();
|
|
for (i = 0; i < n; i++) {
|
|
Area* area = (Area*) mAreas.ElementAt(i);
|
|
nsCOMPtr<nsIContent> areaContent;
|
|
area->GetArea(getter_AddRefs(areaContent));
|
|
if (areaContent) {
|
|
if (areaContent.get() == targetContent.get()) {
|
|
//Set or Remove internal focus
|
|
area->HasFocus(aFocus);
|
|
//Now invalidate the rect
|
|
nsCOMPtr<nsIDocument> doc = targetContent->GetDocument();
|
|
//This check is necessary to see if we're still attached to the doc
|
|
if (doc) {
|
|
nsIPresShell *presShell = doc->GetPrimaryShell();
|
|
if (presShell) {
|
|
nsIFrame* imgFrame = presShell->GetPrimaryFrameFor(targetContent);
|
|
if (imgFrame) {
|
|
nsPresContext *presContext = presShell->GetPresContext();
|
|
if (presContext) {
|
|
nsRect dmgRect;
|
|
area->GetRect(presContext, dmgRect);
|
|
imgFrame->Invalidate(dmgRect, PR_TRUE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsImageMap::HandleEvent(nsIDOMEvent* aEvent)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsImageMap::Destroy(void)
|
|
{
|
|
FreeAreas();
|
|
mMap->RemoveMutationObserver(this);
|
|
}
|