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gecko/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: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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):
* Mats Palmgren <mats.palmgren@bredband.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* code for HTML client-side image maps */
#include "nsImageMap.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsIRenderingContext.h"
#include "nsPresContext.h"
#include "nsIURL.h"
#include "nsIURL.h"
#include "nsIServiceManager.h"
#include "nsNetUtil.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 "nsGkAtoms.h"
#include "nsIDOMEventTarget.h"
#include "nsIPresShell.h"
#include "nsIFrame.h"
#include "nsCoord.h"
#include "nsIImageMap.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsIStringBundle.h"
#include "nsIDocument.h"
#include "nsContentUtils.h"
static NS_DEFINE_CID(kCStringBundleServiceCID, NS_STRINGBUNDLESERVICE_CID);
class Area {
public:
Area(nsIContent* aArea);
virtual ~Area();
virtual void ParseCoords(const nsAString& aSpec);
virtual PRBool IsInside(nscoord x, nscoord y) const = 0;
virtual void Draw(nsIFrame* aFrame, nsIRenderingContext& aRC) = 0;
virtual void GetRect(nsIFrame* aFrame, nsRect& aRect) = 0;
void HasFocus(PRBool aHasFocus);
nsCOMPtr<nsIContent> mArea;
nscoord* mCoords;
PRInt32 mNumCoords;
PRPackedBool mHasFocus;
};
Area::Area(nsIContent* aArea)
: mArea(aArea)
{
MOZ_COUNT_CTOR(Area);
NS_PRECONDITION(mArea, "How did that happen?");
mCoords = nsnull;
mNumCoords = 0;
mHasFocus = PR_FALSE;
}
Area::~Area()
{
MOZ_COUNT_DTOR(Area);
delete [] mCoords;
}
#include <stdlib.h>
inline PRBool
is_space(char c)
{
return (c == ' ' ||
c == '\f' ||
c == '\n' ||
c == '\r' ||
c == '\t' ||
c == '\v');
}
static void logMessage(nsIContent* aContent,
const nsAString& aCoordsSpec,
PRInt32 aFlags,
const char* aMessageName) {
nsIURI* documentURI = nsnull;
nsIDocument* doc = aContent->GetOwnerDoc();
if (doc) {
documentURI = doc->GetDocumentURI();
}
nsContentUtils::ReportToConsole(
nsContentUtils::eLAYOUT_PROPERTIES,
aMessageName,
nsnull, /* params */
0, /* params length */
documentURI,
PromiseFlatString(NS_LITERAL_STRING("coords=\"") +
aCoordsSpec +
NS_LITERAL_STRING("\"")), /* source line */
0, /* line number */
0, /* column number */
aFlags,
"ImageMap");
}
void Area::ParseCoords(const nsAString& aSpec)
{
char* cp = ToNewCString(aSpec);
if (cp) {
char *tptr;
char *n_str;
PRInt32 i, cnt;
PRInt32 *value_list;
/*
* Nothing in an empty list
*/
mNumCoords = 0;
mCoords = nsnull;
if (*cp == '\0')
{
return;
}
/*
* Skip beginning whitespace, all whitespace is empty list.
*/
n_str = cp;
while (is_space(*n_str))
{
n_str++;
}
if (*n_str == '\0')
{
return;
}
/*
* 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)
{
has_comma = PR_TRUE;
}
else
{
break;
}
}
tptr++;
}
/*
* If this was trailing whitespace we skipped, we are done.
*/
if ((*tptr == '\0') && !has_comma)
{
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)
{
*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;
}
/*
* Second pass to copy integer values into list.
*/
tptr = cp;
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;
}
}
mNumCoords = cnt;
mCoords = value_list;
NS_Free(cp);
}
}
void Area::HasFocus(PRBool aHasFocus)
{
mHasFocus = aHasFocus;
}
//----------------------------------------------------------------------
class DefaultArea : public Area {
public:
DefaultArea(nsIContent* aArea);
virtual PRBool IsInside(nscoord x, nscoord y) const;
virtual void Draw(nsIFrame* aFrame, nsIRenderingContext& aRC);
virtual void GetRect(nsIFrame* aFrame, nsRect& aRect);
};
DefaultArea::DefaultArea(nsIContent* aArea)
: Area(aArea)
{
}
PRBool DefaultArea::IsInside(nscoord x, nscoord y) const
{
return PR_TRUE;
}
void DefaultArea::Draw(nsIFrame* aFrame, nsIRenderingContext& aRC)
{
if (mHasFocus) {
nsRect r = aFrame->GetRect();
r.MoveTo(0, 0);
nscoord x1 = r.x;
nscoord y1 = r.y;
const nscoord kOnePixel = nsPresContext::CSSPixelsToAppUnits(1);
nscoord x2 = r.XMost() - kOnePixel;
nscoord y2 = r.YMost() - kOnePixel;
// XXX aRC.DrawRect(r) result is ugly, that's why we use DrawLine.
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 DefaultArea::GetRect(nsIFrame* aFrame, nsRect& aRect)
{
aRect = aFrame->GetRect();
aRect.MoveTo(0, 0);
}
//----------------------------------------------------------------------
class RectArea : public Area {
public:
RectArea(nsIContent* aArea);
virtual void ParseCoords(const nsAString& aSpec);
virtual PRBool IsInside(nscoord x, nscoord y) const;
virtual void Draw(nsIFrame* aFrame, nsIRenderingContext& aRC);
virtual void GetRect(nsIFrame* aFrame, nsRect& aRect);
};
RectArea::RectArea(nsIContent* aArea)
: Area(aArea)
{
}
void RectArea::ParseCoords(const nsAString& aSpec)
{
Area::ParseCoords(aSpec);
PRBool saneRect = PR_TRUE;
PRInt32 flag = nsIScriptError::warningFlag;
if (mNumCoords >= 4) {
if (mCoords[0] > mCoords[2]) {
// x-coords in reversed order
nscoord x = mCoords[2];
mCoords[2] = mCoords[0];
mCoords[0] = x;
saneRect = PR_FALSE;
}
if (mCoords[1] > mCoords[3]) {
// y-coords in reversed order
nscoord y = mCoords[3];
mCoords[3] = mCoords[1];
mCoords[1] = y;
saneRect = PR_FALSE;
}
if (mNumCoords > 4) {
// Someone missed the concept of a rect here
saneRect = PR_FALSE;
}
} else {
saneRect = PR_FALSE;
flag = nsIScriptError::errorFlag;
}
if (!saneRect) {
logMessage(mArea, aSpec, flag, "ImageMapRectBoundsError");
}
}
PRBool RectArea::IsInside(nscoord x, nscoord y) const
{
if (mNumCoords >= 4) { // Note: > is for nav compatability
nscoord x1 = mCoords[0];
nscoord y1 = mCoords[1];
nscoord x2 = mCoords[2];
nscoord y2 = mCoords[3];
NS_ASSERTION(x1 <= x2 && y1 <= y2,
"Someone screwed up RectArea::ParseCoords");
if ((x >= x1) && (x <= x2) && (y >= y1) && (y <= y2)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
void RectArea::Draw(nsIFrame* aFrame, nsIRenderingContext& aRC)
{
if (mHasFocus) {
if (mNumCoords >= 4) {
nscoord x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
nscoord y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
nscoord x2 = nsPresContext::CSSPixelsToAppUnits(mCoords[2]);
nscoord y2 = nsPresContext::CSSPixelsToAppUnits(mCoords[3]);
NS_ASSERTION(x1 <= x2 && y1 <= y2,
"Someone screwed up RectArea::ParseCoords");
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(nsIFrame* aFrame, nsRect& aRect)
{
if (mNumCoords >= 4) {
nscoord x1 = nsPresContext::CSSPixelsToAppUnits(mCoords[0]);
nscoord y1 = nsPresContext::CSSPixelsToAppUnits(mCoords[1]);
nscoord x2 = nsPresContext::CSSPixelsToAppUnits(mCoords[2]);
nscoord y2 = nsPresContext::CSSPixelsToAppUnits(mCoords[3]);
NS_ASSERTION(x1 <= x2 && y1 <= y2,
"Someone screwed up RectArea::ParseCoords");
aRect.SetRect(x1, y1, x2, y2);
}
}
//----------------------------------------------------------------------
class PolyArea : public Area {
public:
PolyArea(nsIContent* aArea);
virtual void ParseCoords(const nsAString& aSpec);
virtual PRBool IsInside(nscoord x, nscoord y) const;
virtual void Draw(nsIFrame* aFrame, nsIRenderingContext& aRC);
virtual void GetRect(nsIFrame* aFrame, nsRect& aRect);
};
PolyArea::PolyArea(nsIContent* aArea)
: Area(aArea)
{
}
void PolyArea::ParseCoords(const nsAString& aSpec)
{
Area::ParseCoords(aSpec);
if (mNumCoords >= 2) {
if (mNumCoords & 1U) {
logMessage(mArea,
aSpec,
nsIScriptError::warningFlag,
"ImageMapPolyOddNumberOfCoords");
}
} else {
logMessage(mArea,
aSpec,
nsIScriptError::errorFlag,
"ImageMapPolyWrongNumberOfCoords");
}
}
PRBool PolyArea::IsInside(nscoord x, nscoord y) const
{
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(nsIFrame* aFrame, 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(nsIFrame* aFrame, 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(nsIFrame* aFrame, nsIRenderingContext& aRC);
virtual void GetRect(nsIFrame* aFrame, 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(nsIFrame* aFrame, 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(nsIFrame* aFrame, 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.Length() == 0, "Destroy was not called");
}
NS_IMPL_ISUPPORTS4(nsImageMap,
nsIMutationObserver,
nsIDOMFocusListener,
nsIDOMEventListener,
nsIImageMap)
NS_IMETHODIMP
nsImageMap::GetBoundsForAreaContent(nsIContent *aContent,
nsRect& aBounds)
{
NS_ENSURE_TRUE(aContent, NS_ERROR_INVALID_ARG);
// Find the Area struct associated with this content node, and return bounds
PRUint32 i, n = mAreas.Length();
for (i = 0; i < n; i++) {
Area* area = mAreas.ElementAt(i);
if (area->mArea == aContent) {
aBounds = nsRect();
nsIFrame* frame = aContent->GetPrimaryFrame();
if (frame) {
area->GetRect(frame, aBounds);
}
return NS_OK;
}
}
return NS_ERROR_FAILURE;
}
void
nsImageMap::FreeAreas()
{
PRUint32 i, n = mAreas.Length();
for (i = 0; i < n; i++) {
Area* area = mAreas.ElementAt(i);
NS_ASSERTION(area->mArea->GetPrimaryFrame() == mImageFrame,
"Unexpected primary frame");
area->mArea->SetPrimaryFrame(nsnull);
area->mArea->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->IsHTML()) {
// 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->IsElement()) {
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)
{
static nsIContent::AttrValuesArray strings[] =
{&nsGkAtoms::rect, &nsGkAtoms::rectangle,
&nsGkAtoms::circle, &nsGkAtoms::circ,
&nsGkAtoms::_default,
&nsGkAtoms::poly, &nsGkAtoms::polygon,
nsnull};
Area* area;
switch (aArea->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::shape,
strings, eIgnoreCase)) {
case nsIContent::ATTR_VALUE_NO_MATCH:
case nsIContent::ATTR_MISSING:
case 0:
case 1:
area = new RectArea(aArea);
break;
case 2:
case 3:
area = new CircleArea(aArea);
break;
case 4:
area = new DefaultArea(aArea);
break;
case 5:
case 6:
area = new PolyArea(aArea);
break;
default:
NS_NOTREACHED("FindAttrValueIn returned an unexpected value.");
break;
}
if (!area)
return NS_ERROR_OUT_OF_MEMORY;
//Add focus listener to track area focus changes
aArea->AddEventListenerByIID(this, NS_GET_IID(nsIDOMFocusListener));
// This is a nasty hack. It needs to go away: see bug 135040. Once this is
// removed, the code added to nsCSSFrameConstructor::RestyleElement,
// nsCSSFrameConstructor::ContentRemoved (both hacks there), and
// nsCSSFrameConstructor::ProcessRestyledFrames to work around this issue can
// be removed.
aArea->SetPrimaryFrame(mImageFrame);
nsAutoString coords;
aArea->GetAttr(kNameSpaceID_None, nsGkAtoms::coords, coords);
area->ParseCoords(coords);
mAreas.AppendElement(area);
return NS_OK;
}
PRBool
nsImageMap::IsInside(nscoord aX, nscoord aY,
nsIContent** aContent) const
{
NS_ASSERTION(mMap, "Not initialized");
PRUint32 i, n = mAreas.Length();
for (i = 0; i < n; i++) {
Area* area = mAreas.ElementAt(i);
if (area->IsInside(aX, aY)) {
NS_ADDREF(*aContent = area->mArea);
return PR_TRUE;
}
}
return PR_FALSE;
}
void
nsImageMap::Draw(nsIFrame* aFrame, nsIRenderingContext& aRC)
{
PRUint32 i, n = mAreas.Length();
for (i = 0; i < n; i++) {
Area* area = mAreas.ElementAt(i);
area->Draw(aFrame, aRC);
}
}
void
nsImageMap::MaybeUpdateAreas(nsIContent *aContent)
{
if (aContent == mMap || mContainsBlockContents) {
UpdateAreas();
}
}
void
nsImageMap::AttributeChanged(nsIDocument* aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
// 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->IsHTML() &&
aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::shape ||
aAttribute == nsGkAtoms::coords)) {
MaybeUpdateAreas(aContent->GetParent());
}
}
void
nsImageMap::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aFirstNewContent,
PRInt32 /* unused */)
{
MaybeUpdateAreas(aContainer);
}
void
nsImageMap::ContentInserted(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 /* unused */)
{
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) {
PRUint32 i, n = mAreas.Length();
for (i = 0; i < n; i++) {
Area* area = mAreas.ElementAt(i);
if (area->mArea == targetContent) {
//Set or Remove internal focus
area->HasFocus(aFocus);
//Now invalidate the rect
nsIFrame* imgFrame = targetContent->GetPrimaryFrame();
if (imgFrame) {
nsRect dmgRect;
area->GetRect(imgFrame, dmgRect);
imgFrame->Invalidate(dmgRect);
}
break;
}
}
}
}
return NS_OK;
}
nsresult
nsImageMap::HandleEvent(nsIDOMEvent* aEvent)
{
return NS_OK;
}
void
nsImageMap::Destroy(void)
{
FreeAreas();
mMap->RemoveMutationObserver(this);
}
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