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gecko-dev/layout/generic/nsImageMap.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsImageMap.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsVoidArray.h"
#include "nsIRenderingContext.h"
#include "nsIPresContext.h"
#include "nsIURL.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsNetUtil.h"
#include "nsISizeOfHandler.h"
#include "nsTextFragment.h"
#include "nsIContent.h"
#include "nsIDOMHTMLElement.h"
#include "nsIDOMHTMLMapElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIDocument.h"
#include "nsINameSpaceManager.h"
#include "nsHTMLAtoms.h"
#include "nsIHTMLContent.h"
#include "nsHTMLIIDs.h"
#include "nsIDOMEventReceiver.h"
#include "nsIPresShell.h"
#include "nsIFrame.h"
#include "nsIFrameManager.h"
#include "nsIViewManager.h"
#include "nsCoord.h"
class Area {
public:
Area(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL);
virtual ~Area();
void ParseCoords(const nsString& aSpec);
virtual PRBool IsInside(nscoord x, nscoord y) = 0;
virtual void Draw(nsIPresContext* aCX,
nsIRenderingContext& aRC) = 0;
virtual void GetRect(nsIPresContext* aCX, nsRect& aRect) = 0;
virtual void GetShapeName(nsString& aResult) const = 0;
void ToHTML(nsString& aResult);
void HasFocus(PRBool aHasFocus);
void GetHREF(nsString& aHref) const;
void GetTarget(nsString& aTarget) const;
void GetAltText(nsString& aAltText) const;
PRBool GetSuppress() const { return mSuppressFeedback; }
PRBool GetHasURL() const { return mHasURL; }
void GetArea(nsIContent** aArea) const;
#ifdef DEBUG
virtual void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
nsCOMPtr<nsIContent> mArea;
nscoord* mCoords;
PRInt32 mNumCoords;
PRBool mSuppressFeedback;
PRBool mHasURL;
PRBool mHasFocus;
nsIFrame* mImageFrame;
};
MOZ_DECL_CTOR_COUNTER(Area)
Area::Area(nsIContent* aArea,
PRBool aSuppress, PRBool aHasURL)
: mArea(aArea), mSuppressFeedback(aSuppress), mHasURL(aHasURL)
{
MOZ_COUNT_CTOR(Area);
mCoords = nsnull;
mNumCoords = 0;
mHasFocus = PR_FALSE;
}
Area::~Area()
{
MOZ_COUNT_DTOR(Area);
delete [] mCoords;
}
void
Area::GetHREF(nsString& aHref) const
{
aHref.Truncate();
if (mArea) {
mArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::href, aHref);
}
}
void
Area::GetTarget(nsString& aTarget) const
{
aTarget.Truncate();
if (mArea) {
mArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::target, aTarget);
}
}
void
Area::GetAltText(nsString& aAltText) const
{
aAltText.Truncate();
if (mArea) {
mArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::alt, aAltText);
}
}
void
Area::GetArea(nsIContent** aArea) const
{
*aArea = mArea;
NS_IF_ADDREF(*aArea);
}
#ifdef DEBUG
void
Area::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (aResult) {
PRUint32 sum = sizeof(*this);
sum += mNumCoords * sizeof(nscoord);
*aResult = sum;
}
}
#endif
#include <stdlib.h>
inline PRBool
is_space(char c)
{
return (c == ' ' ||
c == '\f' ||
c == '\n' ||
c == '\r' ||
c == '\t' ||
c == '\v');
}
// XXX straight copy from laymap.c
static nscoord* lo_parse_coord_list(char *str, PRInt32* value_cnt)
{
char *tptr;
char *n_str;
PRInt32 i, cnt;
PRInt32 *value_list;
/*
* Nothing in an empty list
*/
*value_cnt = 0;
if (!str || *str == '\0')
{
return nsnull;
}
/*
* Skip beginning whitespace, all whitespace is empty list.
*/
n_str = str;
while (is_space(*n_str))
{
n_str++;
}
if (*n_str == '\0')
{
return nsnull;
}
/*
* Make a pass where any two numbers separated by just whitespace
* are given a comma separator. Count entries while passing.
*/
cnt = 0;
while (*n_str != '\0')
{
PRBool has_comma;
/*
* Skip to a separator
*/
tptr = n_str;
while (!is_space(*tptr) && *tptr != ',' && *tptr != '\0')
{
tptr++;
}
n_str = tptr;
/*
* If no more entries, break out here
*/
if (*n_str == '\0')
{
break;
}
/*
* Skip to the end of the separator, noting if we have a
* comma.
*/
has_comma = PR_FALSE;
while (is_space(*tptr) || *tptr == ',')
{
if (*tptr == ',')
{
if (has_comma == PR_FALSE)
{
has_comma = PR_TRUE;
}
else
{
break;
}
}
tptr++;
}
/*
* If this was trailing whitespace we skipped, we are done.
*/
if ((*tptr == '\0')&&(has_comma == PR_FALSE))
{
break;
}
/*
* Else if the separator is all whitespace, and this is not the
* end of the string, add a comma to the separator.
*/
else if (has_comma == PR_FALSE)
{
*n_str = ',';
}
/*
* count the entry skipped.
*/
cnt++;
n_str = tptr;
}
/*
* count the last entry in the list.
*/
cnt++;
/*
* Allocate space for the coordinate array.
*/
value_list = new nscoord[cnt];
if (!value_list)
{
return nsnull;
}
/*
* Second pass to copy integer values into list.
*/
tptr = str;
for (i=0; i<cnt; i++)
{
char *ptr;
ptr = strchr(tptr, ',');
if (ptr)
{
*ptr = '\0';
}
/*
* Strip whitespace in front of number because I don't
* trust atoi to do it on all platforms.
*/
while (is_space(*tptr))
{
tptr++;
}
if (*tptr == '\0')
{
value_list[i] = 0;
}
else
{
value_list[i] = (nscoord) ::atoi(tptr);
}
if (ptr)
{
*ptr = ',';
tptr = ptr + 1;
}
}
*value_cnt = cnt;
return value_list;
}
void Area::ParseCoords(const nsString& aSpec)
{
char* cp = ToNewCString(aSpec);
if (cp) {
mCoords = lo_parse_coord_list(cp, &mNumCoords);
nsCRT::free(cp);
}
}
void Area::ToHTML(nsString& aResult)
{
nsAutoString href, target, altText;
if (mArea) {
mArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::href, href);
mArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::target, target);
mArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::alt, altText);
}
aResult.Truncate();
aResult.AppendWithConversion("<AREA SHAPE=");
nsAutoString shape;
GetShapeName(shape);
aResult.Append(shape);
aResult.AppendWithConversion(" COORDS=\"");
if (nsnull != mCoords) {
PRInt32 i, n = mNumCoords;
for (i = 0; i < n; i++) {
aResult.AppendInt(mCoords[i], 10);
if (i < n - 1) {
aResult.AppendWithConversion(',');
}
}
}
aResult.AppendWithConversion("\" HREF=\"");
aResult.Append(href);
aResult.AppendWithConversion("\"");
if (0 < target.Length()) {
aResult.AppendWithConversion(" TARGET=\"");
aResult.Append(target);
aResult.AppendWithConversion("\"");
}
if (0 < altText.Length()) {
aResult.AppendWithConversion(" ALT=\"");
aResult.Append(altText);
aResult.AppendWithConversion("\"");
}
if (mSuppressFeedback) {
aResult.AppendWithConversion(" SUPPRESS");
}
aResult.AppendWithConversion('>');
}
void Area::HasFocus(PRBool aHasFocus)
{
mHasFocus = aHasFocus;
}
//----------------------------------------------------------------------
class DefaultArea : public Area {
public:
DefaultArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL);
~DefaultArea();
virtual PRBool IsInside(nscoord x, nscoord y);
virtual void Draw(nsIPresContext* aCX,
nsIRenderingContext& aRC);
virtual void GetRect(nsIPresContext* aCX, nsRect& aRect);
virtual void GetShapeName(nsString& aResult) const;
};
DefaultArea::DefaultArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL)
: Area(aArea, aSuppress, aHasURL)
{
}
DefaultArea::~DefaultArea()
{
}
PRBool DefaultArea::IsInside(nscoord x, nscoord y)
{
return PR_TRUE;
}
void DefaultArea::Draw(nsIPresContext* aCX, nsIRenderingContext& aRC)
{
}
void DefaultArea::GetRect(nsIPresContext* aCX, nsRect& aRect)
{
}
void DefaultArea::GetShapeName(nsString& aResult) const
{
aResult.AppendWithConversion("default");
}
//----------------------------------------------------------------------
class RectArea : public Area {
public:
RectArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL);
~RectArea();
virtual PRBool IsInside(nscoord x, nscoord y);
virtual void Draw(nsIPresContext* aCX,
nsIRenderingContext& aRC);
virtual void GetRect(nsIPresContext* aCX, nsRect& aRect);
virtual void GetShapeName(nsString& aResult) const;
};
RectArea::RectArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL)
: Area(aArea, aSuppress, aHasURL)
{
}
RectArea::~RectArea()
{
}
PRBool RectArea::IsInside(nscoord x, nscoord y)
{
if (mNumCoords >= 4) { // Note: > is for nav compatabilty
nscoord x1 = mCoords[0];
nscoord y1 = mCoords[1];
nscoord x2 = mCoords[2];
nscoord y2 = mCoords[3];
if ((x1 > x2)|| (y1 > y2)) {
// Can't be inside a screwed up rect
return PR_FALSE;
}
if ((x >= x1) && (x <= x2) && (y >= y1) && (y <= y2)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
void RectArea::Draw(nsIPresContext* aCX, nsIRenderingContext& aRC)
{
if (mHasFocus) {
if (mNumCoords >= 4) {
float p2t;
aCX->GetPixelsToTwips(&p2t);
nscoord x1 = NSIntPixelsToTwips(mCoords[0], p2t);
nscoord y1 = NSIntPixelsToTwips(mCoords[1], p2t);
nscoord x2 = NSIntPixelsToTwips(mCoords[2], p2t);
nscoord y2 = NSIntPixelsToTwips(mCoords[3], p2t);
if ((x1 > x2)|| (y1 > y2)) {
return;
}
aRC.DrawLine(x1, y1, x1, y2);
aRC.DrawLine(x1, y2, x2, y2);
aRC.DrawLine(x1, y1, x2, y1);
aRC.DrawLine(x2, y1, x2, y2);
}
}
}
void RectArea::GetRect(nsIPresContext* aCX, nsRect& aRect)
{
if (mNumCoords >= 4) {
float p2t;
aCX->GetPixelsToTwips(&p2t);
nscoord x1 = NSIntPixelsToTwips(mCoords[0], p2t);
nscoord y1 = NSIntPixelsToTwips(mCoords[1], p2t);
nscoord x2 = NSIntPixelsToTwips(mCoords[2], p2t);
nscoord y2 = NSIntPixelsToTwips(mCoords[3], p2t);
if ((x1 > x2)|| (y1 > y2)) {
return;
}
nsRect tmp(x1, y1, x2, y2);
aRect = tmp;
}
}
void RectArea::GetShapeName(nsString& aResult) const
{
aResult.AppendWithConversion("rect");
}
//----------------------------------------------------------------------
class PolyArea : public Area {
public:
PolyArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL);
~PolyArea();
virtual PRBool IsInside(nscoord x, nscoord y);
virtual void Draw(nsIPresContext* aCX,
nsIRenderingContext& aRC);
virtual void GetRect(nsIPresContext* aCX, nsRect& aRect);
virtual void GetShapeName(nsString& aResult) const;
};
PolyArea::PolyArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL)
: Area(aArea, aSuppress, aHasURL)
{
}
PolyArea::~PolyArea()
{
}
PRBool PolyArea::IsInside(nscoord x, nscoord y)
{
if (mNumCoords >= 6) {
PRInt32 intersects = 0;
nscoord wherex = x;
nscoord wherey = y;
PRInt32 totalv = mNumCoords / 2;
PRInt32 totalc = totalv * 2;
nscoord xval = mCoords[totalc - 2];
nscoord yval = mCoords[totalc - 1];
PRInt32 end = totalc;
PRInt32 pointer = 1;
if ((yval >= wherey) != (mCoords[pointer] >= wherey))
if ((xval >= wherex) == (mCoords[0] >= wherex))
intersects += (xval >= wherex) ? 1 : 0;
else
intersects += ((xval - (yval - wherey) *
(mCoords[0] - xval) /
(mCoords[pointer] - yval)) >= wherex) ? 1 : 0;
// XXX I wonder what this is doing; this is a translation of ptinpoly.c
while (pointer < end) {
yval = mCoords[pointer];
pointer += 2;
if (yval >= wherey) {
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;
}
} 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(nsIPresContext* aCX, nsIRenderingContext& aRC)
{
if (mHasFocus) {
if (mNumCoords >= 6) {
float p2t;
aCX->GetPixelsToTwips(&p2t);
nscoord x0 = NSIntPixelsToTwips(mCoords[0], p2t);
nscoord y0 = NSIntPixelsToTwips(mCoords[1], p2t);
nscoord x1, y1;
for (PRInt32 i = 2; i < mNumCoords; i += 2) {
x1 = NSIntPixelsToTwips(mCoords[i], p2t);
y1 = NSIntPixelsToTwips(mCoords[i+1], p2t);
aRC.DrawLine(x0, y0, x1, y1);
x0 = x1;
y0 = y1;
}
x1 = NSIntPixelsToTwips(mCoords[0], p2t);
y1 = NSIntPixelsToTwips(mCoords[1], p2t);
aRC.DrawLine(x0, y0, x1, y1);
}
}
}
void PolyArea::GetRect(nsIPresContext* aCX, nsRect& aRect)
{
if (mNumCoords >= 6) {
float p2t;
aCX->GetPixelsToTwips(&p2t);
nscoord x1, x2, y1, y2, xtmp, ytmp;
x1 = x2 = NSIntPixelsToTwips(mCoords[0], p2t);
y1 = y2 = NSIntPixelsToTwips(mCoords[1], p2t);
for (PRInt32 i = 2; i < mNumCoords; i += 2) {
xtmp = NSIntPixelsToTwips(mCoords[i], p2t);
ytmp = NSIntPixelsToTwips(mCoords[i+1], p2t);
x1 = x1 < xtmp ? x1 : xtmp;
y1 = y1 < ytmp ? y1 : ytmp;
x2 = x2 > xtmp ? x2 : xtmp;
y2 = y2 > ytmp ? y2 : ytmp;
}
nsRect tmp(x1, y1, x2, y2);
aRect = tmp;
}
}
void PolyArea::GetShapeName(nsString& aResult) const
{
aResult.AppendWithConversion("polygon");
}
//----------------------------------------------------------------------
class CircleArea : public Area {
public:
CircleArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL);
~CircleArea();
virtual PRBool IsInside(nscoord x, nscoord y);
virtual void Draw(nsIPresContext* aCX,
nsIRenderingContext& aRC);
virtual void GetRect(nsIPresContext* aCX, nsRect& aRect);
virtual void GetShapeName(nsString& aResult) const;
};
CircleArea::CircleArea(nsIContent* aArea, PRBool aSuppress, PRBool aHasURL)
: Area(aArea, aSuppress, aHasURL)
{
}
CircleArea::~CircleArea()
{
}
PRBool CircleArea::IsInside(nscoord x, nscoord y)
{
// Note: > is for nav compatabilty
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(nsIPresContext* aCX, nsIRenderingContext& aRC)
{
if (mHasFocus) {
if (mNumCoords >= 3) {
float p2t;
aCX->GetPixelsToTwips(&p2t);
nscoord x1 = NSIntPixelsToTwips(mCoords[0], p2t);
nscoord y1 = NSIntPixelsToTwips(mCoords[1], p2t);
nscoord radius = NSIntPixelsToTwips(mCoords[2], p2t);
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(nsIPresContext* aCX, nsRect& aRect)
{
if (mNumCoords >= 3) {
float p2t;
aCX->GetPixelsToTwips(&p2t);
nscoord x1 = NSIntPixelsToTwips(mCoords[0], p2t);
nscoord y1 = NSIntPixelsToTwips(mCoords[1], p2t);
nscoord radius = NSIntPixelsToTwips(mCoords[2], p2t);
if (radius < 0) {
return;
}
nsRect tmp(x1 - radius, y1 - radius, x1 + radius, y1 + radius);
aRect = tmp;
}
}
void CircleArea::GetShapeName(nsString& aResult) const
{
aResult.AppendWithConversion("circle");
}
//----------------------------------------------------------------------
nsImageMap::nsImageMap()
{
NS_INIT_REFCNT();
mMap = nsnull;
mDomMap = nsnull;
mDocument = nsnull;
mContainsBlockContents = PR_FALSE;
}
nsImageMap::~nsImageMap()
{
//Remove all our focus listeners
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) {
nsCOMPtr<nsIDOMEventReceiver> rec(do_QueryInterface(areaContent));
if (rec) {
rec->RemoveEventListenerByIID(this, NS_GET_IID(nsIDOMFocusListener));
}
}
}
FreeAreas();
if (nsnull != mDocument) {
mDocument->RemoveObserver(NS_STATIC_CAST(nsIDocumentObserver*, this));
}
NS_IF_RELEASE(mMap);
}
NS_IMPL_ADDREF(nsImageMap)
NS_IMPL_RELEASE(nsImageMap)
NS_IMETHODIMP
nsImageMap::QueryInterface(REFNSIID iid, void** result)
{
if (! result)
return NS_ERROR_NULL_POINTER;
*result = nsnull;
if (iid.Equals(NS_GET_IID(nsISupports)) ||
iid.Equals(NS_GET_IID(nsIDocumentObserver))) {
*result = NS_STATIC_CAST(nsIDocumentObserver*, this);
}
else if (iid.Equals(NS_GET_IID(nsIDOMFocusListener)) ||
iid.Equals(NS_GET_IID(nsIDOMEventListener))) {
*result = NS_STATIC_CAST(nsIDOMFocusListener*, this);
}
else {
return NS_NOINTERFACE;
}
NS_ADDREF_THIS();
return NS_OK;
}
void
nsImageMap::FreeAreas()
{
nsCOMPtr<nsIFrameManager> frameManager;
mPresShell->GetFrameManager(getter_AddRefs(frameManager));
PRInt32 i, n = mAreas.Count();
for (i = 0; i < n; i++) {
Area* area = (Area*) mAreas.ElementAt(i);
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;
mDomMap = aMap;
nsresult rv = aMap->QueryInterface(NS_GET_IID(nsIContent), (void**) &mMap);
if (NS_SUCCEEDED(rv)) {
rv = mMap->GetDocument(mDocument);
if (NS_SUCCEEDED(rv) && (nsnull != mDocument)) {
mDocument->AddObserver(NS_STATIC_CAST(nsIDocumentObserver*, this));
// mDocument is a weak reference, so release the reference we got
nsIDocument *temp = mDocument;
NS_RELEASE(temp);
}
}
// "Compile" the areas in the map into faster access versions
rv = UpdateAreas();
return rv;
}
nsresult
nsImageMap::UpdateAreasForBlock(nsIContent* aParent, PRBool* aFoundAnchor)
{
nsresult rv = NS_OK;
nsIContent* child;
PRInt32 i, n;
aParent->ChildCount(n);
for (i = 0; (i < n) && NS_SUCCEEDED(rv); i++) {
rv = aParent->ChildAt(i, child);
if (NS_SUCCEEDED(rv)) {
nsIDOMHTMLAnchorElement* area;
rv = child->QueryInterface(NS_GET_IID(nsIDOMHTMLAnchorElement), (void**) &area);
if (NS_SUCCEEDED(rv)) {
*aFoundAnchor = PR_TRUE;
rv = AddArea(child);
NS_RELEASE(area);
}
else {
rv = UpdateAreasForBlock(child, aFoundAnchor);
}
NS_RELEASE(child);
}
}
return rv;
}
nsresult
nsImageMap::UpdateAreas()
{
// Get rid of old area data
FreeAreas();
PRInt32 i, n;
PRBool containsBlock = PR_FALSE, containsArea = PR_FALSE;
mMap->ChildCount(n);
for (i = 0; i < n; i++) {
nsCOMPtr<nsIContent> child;
mMap->ChildAt(i, *getter_AddRefs(child));
// Only look at elements and not text, comments, etc.
nsCOMPtr<nsIDOMHTMLElement> element = do_QueryInterface(child);
if (! element)
continue;
// First check if this map element contains an AREA element.
// If so, we only look for AREA elements
if (!containsBlock) {
nsCOMPtr<nsIDOMHTMLAreaElement> area = do_QueryInterface(child);
if (area) {
containsArea = PR_TRUE;
AddArea(child);
}
}
// If we haven't determined that the map element contains an
// AREA element yet, the look for a block element with children
// that are anchors.
if (!containsArea) {
UpdateAreasForBlock(child, &containsBlock);
if (containsBlock)
mContainsBlockContents = PR_TRUE;
}
}
return NS_OK;
}
nsresult
nsImageMap::AddArea(nsIContent* aArea)
{
nsAutoString shape, coords, baseURL, noHref;
aArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::shape, shape);
aArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::coords, coords);
PRBool hasURL = (PRBool)(NS_CONTENT_ATTR_HAS_VALUE != aArea->GetAttr(kNameSpaceID_None, nsHTMLAtoms::nohref, noHref));
PRBool suppress = PR_FALSE;/* XXX */
//Add focus listener to track area focus changes
nsCOMPtr<nsIDOMEventReceiver> rec(do_QueryInterface(aArea));
if (rec) {
rec->AddEventListenerByIID(this, NS_GET_IID(nsIDOMFocusListener));
}
Area* area;
if ((0 == shape.Length()) ||
shape.EqualsIgnoreCase("rect") ||
shape.EqualsIgnoreCase("rectangle")) {
area = new RectArea(aArea, suppress, hasURL);
}
else if (shape.EqualsIgnoreCase("poly") ||
shape.EqualsIgnoreCase("polygon")) {
area = new PolyArea(aArea, suppress, hasURL);
}
else if (shape.EqualsIgnoreCase("circle") ||
shape.EqualsIgnoreCase("circ")) {
area = new CircleArea(aArea, suppress, hasURL);
}
else {
area = new DefaultArea(aArea, suppress, hasURL);
}
area->mImageFrame = mImageFrame;
area->ParseCoords(coords);
mAreas.AppendElement(area);
return NS_OK;
}
PRBool
nsImageMap::IsInside(nscoord aX, nscoord aY,
nsIContent** aContent,
nsString& aAbsURL,
nsString& aTarget,
nsString& aAltText,
PRBool* aSuppress)
{
PRInt32 i, n = mAreas.Count();
for (i = 0; i < n; i++) {
Area* area = (Area*) mAreas.ElementAt(i);
if (area->IsInside(aX, aY)) {
if (area->GetHasURL()) {
// Set the image loader's source URL and base URL
nsIURI* baseUri = nsnull;
if (mMap) {
nsIHTMLContent* htmlContent;
if (NS_SUCCEEDED( mMap->QueryInterface(kIHTMLContentIID, (void**)&htmlContent) )) {
htmlContent->GetBaseURL(baseUri);
NS_RELEASE(htmlContent);
}
else {
nsIDocument* doc;
if (NS_SUCCEEDED( mMap->GetDocument(doc) ) && doc) {
doc->GetBaseURL(baseUri); // Could just use mDocument here...
NS_RELEASE(doc);
}
}
}
if (!baseUri) return PR_FALSE;
nsAutoString href;
area->GetHREF(href);
NS_MakeAbsoluteURI(aAbsURL, href, baseUri);
NS_RELEASE(baseUri);
}
area->GetTarget(aTarget);
if (mMap && (aTarget.Length() == 0)) {
nsIHTMLContent* content = nsnull;
nsresult result = mMap->QueryInterface(kIHTMLContentIID, (void**)&content);
if ((NS_OK == result) && content) {
content->GetBaseTarget(aTarget);
NS_RELEASE(content);
}
}
area->GetAltText(aAltText);
*aSuppress = area->mSuppressFeedback;
area->GetArea(aContent);
return PR_TRUE;
}
}
return PR_FALSE;
}
PRBool
nsImageMap::IsInside(nscoord aX, nscoord aY)
{
PRInt32 i, n = mAreas.Count();
for (i = 0; i < n; i++) {
Area* area = (Area*) mAreas.ElementAt(i);
if (area->IsInside(aX, aY)) {
nsAutoString href;
area->GetHREF(href);
if (href.Length() > 0) {
return PR_TRUE;
}
else {
//We need to return here so we don't hit an overlapping map area
return PR_FALSE;
}
}
}
return PR_FALSE;
}
void
nsImageMap::Draw(nsIPresContext* aCX, nsIRenderingContext& aRC)
{
PRInt32 i, n = mAreas.Count();
for (i = 0; i < n; i++) {
Area* area = (Area*) mAreas.ElementAt(i);
area->Draw(aCX, aRC);
}
}
NS_IMETHODIMP
nsImageMap::BeginUpdate(nsIDocument *aDocument)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::EndUpdate(nsIDocument *aDocument)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::BeginLoad(nsIDocument *aDocument)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::EndLoad(nsIDocument *aDocument)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::BeginReflow(nsIDocument *aDocument, nsIPresShell* aShell)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::EndReflow(nsIDocument *aDocument, nsIPresShell* aShell)
{
return NS_OK;
}
PRBool
nsImageMap::IsAncestorOf(nsIContent* aContent,
nsIContent* aAncestorContent)
{
nsIContent* parent;
nsresult rv = aContent->GetParent(parent);
if (NS_SUCCEEDED(rv) && (nsnull != parent)) {
PRBool rBool;
if (parent == aAncestorContent) {
rBool = PR_TRUE;
}
else {
rBool = IsAncestorOf(parent, aAncestorContent);
}
NS_RELEASE(parent);
return rBool;
}
return PR_FALSE;
}
NS_IMETHODIMP
nsImageMap::ContentChanged(nsIDocument *aDocument,
nsIContent* aContent,
nsISupports* aSubContent)
{
// If the parent of the changing content node is our map then update
// the map.
nsIContent* parent;
nsresult rv = aContent->GetParent(parent);
if (NS_SUCCEEDED(rv) && (nsnull != parent)) {
if ((parent == mMap) ||
(mContainsBlockContents && IsAncestorOf(parent, mMap))) {
UpdateAreas();
}
NS_RELEASE(parent);
}
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType,
PRInt32 aHint)
{
// If the parent of the changing content node is our map then update
// the map.
nsIContent* parent;
nsresult rv = aContent->GetParent(parent);
if (NS_SUCCEEDED(rv) && (nsnull != parent)) {
if ((parent == mMap) ||
(mContainsBlockContents && IsAncestorOf(parent, mMap))) {
UpdateAreas();
}
NS_RELEASE(parent);
}
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
if ((mMap == aContainer) ||
(mContainsBlockContents && IsAncestorOf(aContainer, mMap))) {
UpdateAreas();
}
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::ContentInserted(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
if ((mMap == aContainer) ||
(mContainsBlockContents && IsAncestorOf(aContainer, mMap))) {
UpdateAreas();
}
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::ContentReplaced(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer)
{
if ((mMap == aContainer) ||
(mContainsBlockContents && IsAncestorOf(aContainer, mMap))) {
UpdateAreas();
}
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
if ((mMap == aContainer) ||
(mContainsBlockContents && IsAncestorOf(aContainer, mMap))) {
UpdateAreas();
}
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::StyleSheetDisabledStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDisabled)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
return NS_OK;
}
NS_IMETHODIMP
nsImageMap::DocumentWillBeDestroyed(nsIDocument *aDocument)
{
return NS_OK;
}
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;
//This check is necessary to see if we're still attached to the doc
if (NS_SUCCEEDED(targetContent->GetDocument(*getter_AddRefs(doc))) && doc) {
nsCOMPtr<nsIPresShell> presShell;
doc->GetShellAt(0, getter_AddRefs(presShell));
if (presShell) {
nsIFrame* imgFrame = area->mImageFrame;
nsCOMPtr<nsIPresContext> presContext;
if (NS_SUCCEEDED(presShell->GetPresContext(getter_AddRefs(presContext))) && presContext) {
nsRect dmgRect;
area->GetRect(presContext, dmgRect);
Invalidate(presContext, imgFrame, dmgRect);
}
}
}
}
}
}
}
}
return NS_OK;
}
nsresult
nsImageMap::HandleEvent(nsIDOMEvent* aEvent)
{
return NS_OK;
}
nsresult
nsImageMap::Invalidate(nsIPresContext* aPresContext, nsIFrame* aFrame, nsRect& aRect)
{
nsCOMPtr<nsIViewManager> viewManager;
PRUint32 flags = NS_VMREFRESH_IMMEDIATE;
nsIView* view;
nsRect damageRect(aRect);
aFrame->GetView(aPresContext, &view);
if (view) {
view->GetViewManager(*getter_AddRefs(viewManager));
viewManager->UpdateView(view, damageRect, flags);
}
else {
nsPoint offset;
aFrame->GetOffsetFromView(aPresContext, offset, &view);
NS_ASSERTION(nsnull != view, "no view");
damageRect += offset;
view->GetViewManager(*getter_AddRefs(viewManager));
viewManager->UpdateView(view, damageRect, flags);
}
return NS_OK;
}
void
nsImageMap::Destroy(void)
{
//Remove all our focus listeners
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) {
nsCOMPtr<nsIDOMEventReceiver> rec(do_QueryInterface(areaContent));
if (rec) {
rec->RemoveEventListenerByIID(this, NS_GET_IID(nsIDOMFocusListener));
}
}
}
}
#ifdef DEBUG
void
nsImageMap::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (aResult) {
PRUint32 sum = sizeof(*this);
PRInt32 i, n = mAreas.Count();
for (i = 0; i < n; i++) {
Area* area = (Area*) mAreas.ElementAt(i);
PRUint32 areaSize;
area->SizeOf(aHandler, &areaSize);
sum += areaSize;
}
*aResult = sum;
}
}
#endif
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