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gecko/editor/libeditor/html/nsHTMLObjectResizer.cpp
Chris Pearce b758ddf2ee Bug 431086 - nsHTMLObjectResizer refactor.
2009-04-14 15:05:34 +12:00

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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.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Daniel Glazman (glazman@netscape.com) (Original author)
*
* 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 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 ***** */
#include "nsHTMLObjectResizer.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMNSHTMLElement.h"
#include "nsPIDOMEventTarget.h"
#include "nsIDOMText.h"
#include "nsIDOMCSSValue.h"
#include "nsIDOMCSSPrimitiveValue.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIDocumentObserver.h"
#include "nsIEditor.h"
#include "nsIPresShell.h"
#include "nsPIDOMWindow.h"
#include "nsHTMLEditor.h"
#include "nsEditor.h"
#include "nsEditorUtils.h"
#include "nsHTMLEditUtils.h"
#include "nsPoint.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsIServiceManager.h"
#include "nsPresContext.h"
#include "nsILookAndFeel.h"
#include "nsWidgetsCID.h"
class nsHTMLEditUtils;
static NS_DEFINE_CID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
// ==================================================================
// DocumentResizeEventListener
// ==================================================================
NS_IMPL_ISUPPORTS1(DocumentResizeEventListener, nsIDOMEventListener)
DocumentResizeEventListener::DocumentResizeEventListener(nsIHTMLEditor * aEditor)
{
mEditor = do_GetWeakReference(aEditor);
}
DocumentResizeEventListener::~DocumentResizeEventListener()
{
}
NS_IMETHODIMP
DocumentResizeEventListener::HandleEvent(nsIDOMEvent* aMouseEvent)
{
nsCOMPtr<nsIHTMLObjectResizer> objectResizer = do_QueryReferent(mEditor);
if (objectResizer)
return objectResizer->RefreshResizers();
return NS_OK;
}
// ==================================================================
// ResizerSelectionListener
// ==================================================================
NS_IMPL_ISUPPORTS1(ResizerSelectionListener, nsISelectionListener)
ResizerSelectionListener::ResizerSelectionListener(nsIHTMLEditor * aEditor)
{
mEditor = do_GetWeakReference(aEditor);
}
ResizerSelectionListener::~ResizerSelectionListener()
{
}
NS_IMETHODIMP
ResizerSelectionListener::NotifySelectionChanged(nsIDOMDocument *, nsISelection *aSelection, PRInt16 aReason)
{
if ((aReason & (nsISelectionListener::MOUSEDOWN_REASON |
nsISelectionListener::KEYPRESS_REASON |
nsISelectionListener::SELECTALL_REASON)) && aSelection)
{
// the selection changed and we need to check if we have to
// hide and/or redisplay resizing handles
nsCOMPtr<nsIHTMLEditor> editor = do_QueryReferent(mEditor);
if (editor)
editor->CheckSelectionStateForAnonymousButtons(aSelection);
}
return NS_OK;
}
// ==================================================================
// ResizerMouseMotionListener
// ==================================================================
NS_IMPL_ISUPPORTS2(ResizerMouseMotionListener, nsIDOMEventListener, nsIDOMMouseMotionListener)
ResizerMouseMotionListener::ResizerMouseMotionListener(nsIHTMLEditor * aEditor)
{
mEditor = do_GetWeakReference(aEditor);
}
ResizerMouseMotionListener::~ResizerMouseMotionListener()
{
}
NS_IMETHODIMP
ResizerMouseMotionListener::MouseMove(nsIDOMEvent* aMouseEvent)
{
nsCOMPtr<nsIDOMMouseEvent> mouseEvent ( do_QueryInterface(aMouseEvent) );
if (!mouseEvent) {
//non-ui event passed in. bad things.
return NS_OK;
}
// Don't do anything special if not an HTML object resizer editor
nsCOMPtr<nsIHTMLObjectResizer> objectResizer = do_QueryReferent(mEditor);
if (objectResizer)
{
// check if we have to redisplay a resizing shadow
objectResizer->MouseMove(aMouseEvent);
}
return NS_OK;
}
NS_IMETHODIMP
ResizerMouseMotionListener::HandleEvent(nsIDOMEvent* aMouseEvent)
{
return NS_OK;
}
NS_IMETHODIMP
ResizerMouseMotionListener::DragMove(nsIDOMEvent* aMouseEvent)
{
return NS_OK;
}
// ==================================================================
// nsHTMLEditor
// ==================================================================
nsresult
nsHTMLEditor::CreateResizer(nsIDOMElement ** aReturn, PRInt16 aLocation, nsIDOMNode * aParentNode)
{
nsresult res = CreateAnonymousElement(NS_LITERAL_STRING("span"),
aParentNode,
NS_LITERAL_STRING("mozResizer"),
PR_FALSE,
aReturn);
if (NS_FAILED(res)) return res;
if (!*aReturn)
return NS_ERROR_FAILURE;
// add the mouse listener so we can detect a click on a resizer
nsCOMPtr<nsIDOMEventTarget> evtTarget(do_QueryInterface(*aReturn));
evtTarget->AddEventListener(NS_LITERAL_STRING("mousedown"), mMouseListenerP, PR_TRUE);
nsAutoString locationStr;
switch (aLocation) {
case nsIHTMLObjectResizer::eTopLeft:
locationStr = kTopLeft;
break;
case nsIHTMLObjectResizer::eTop:
locationStr = kTop;
break;
case nsIHTMLObjectResizer::eTopRight:
locationStr = kTopRight;
break;
case nsIHTMLObjectResizer::eLeft:
locationStr = kLeft;
break;
case nsIHTMLObjectResizer::eRight:
locationStr = kRight;
break;
case nsIHTMLObjectResizer::eBottomLeft:
locationStr = kBottomLeft;
break;
case nsIHTMLObjectResizer::eBottom:
locationStr = kBottom;
break;
case nsIHTMLObjectResizer::eBottomRight:
locationStr = kBottomRight;
break;
}
res = (*aReturn)->SetAttribute(NS_LITERAL_STRING("anonlocation"),
locationStr);
return res;
}
nsresult
nsHTMLEditor::CreateShadow(nsIDOMElement ** aReturn, nsIDOMNode * aParentNode,
nsIDOMElement * aOriginalObject)
{
// let's create an image through the element factory
nsAutoString name;
if (nsHTMLEditUtils::IsImage(aOriginalObject))
name.AssignLiteral("img");
else
name.AssignLiteral("span");
nsresult res = CreateAnonymousElement(name,
aParentNode,
NS_LITERAL_STRING("mozResizingShadow"),
PR_TRUE,
aReturn);
if (!*aReturn)
return NS_ERROR_FAILURE;
return res;
}
nsresult
nsHTMLEditor::CreateResizingInfo(nsIDOMElement ** aReturn, nsIDOMNode * aParentNode)
{
// let's create an info box through the element factory
nsresult res = CreateAnonymousElement(NS_LITERAL_STRING("span"),
aParentNode,
NS_LITERAL_STRING("mozResizingInfo"),
PR_TRUE,
aReturn);
if (!*aReturn)
return NS_ERROR_FAILURE;
return res;
}
nsresult
nsHTMLEditor::SetAllResizersPosition()
{
if (!mTopLeftHandle)
return NS_ERROR_FAILURE;
PRInt32 x = mResizedObjectX;
PRInt32 y = mResizedObjectY;
PRInt32 w = mResizedObjectWidth;
PRInt32 h = mResizedObjectHeight;
// now let's place all the resizers around the image
// get the size of resizers
nsAutoString value;
float resizerWidth, resizerHeight;
nsCOMPtr<nsIAtom> dummyUnit;
mHTMLCSSUtils->GetComputedProperty(mTopLeftHandle, nsEditProperty::cssWidth, value);
mHTMLCSSUtils->ParseLength(value, &resizerWidth, getter_AddRefs(dummyUnit));
mHTMLCSSUtils->GetComputedProperty(mTopLeftHandle, nsEditProperty::cssHeight, value);
mHTMLCSSUtils->ParseLength(value, &resizerHeight, getter_AddRefs(dummyUnit));
PRInt32 rw = (PRInt32)((resizerWidth + 1) / 2);
PRInt32 rh = (PRInt32)((resizerHeight+ 1) / 2);
SetAnonymousElementPosition(x-rw, y-rh, mTopLeftHandle);
SetAnonymousElementPosition(x+w/2-rw, y-rh, mTopHandle);
SetAnonymousElementPosition(x+w-rw-1, y-rh, mTopRightHandle);
SetAnonymousElementPosition(x-rw, y+h/2-rh, mLeftHandle);
SetAnonymousElementPosition(x+w-rw-1, y+h/2-rh, mRightHandle);
SetAnonymousElementPosition(x-rw, y+h-rh-1, mBottomLeftHandle);
SetAnonymousElementPosition(x+w/2-rw, y+h-rh-1, mBottomHandle);
SetAnonymousElementPosition(x+w-rw-1, y+h-rh-1, mBottomRightHandle);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::RefreshResizers()
{
// nothing to do if resizers are not displayed...
if (!mResizedObject)
return NS_OK;
nsresult res = GetPositionAndDimensions(mResizedObject,
mResizedObjectX,
mResizedObjectY,
mResizedObjectWidth,
mResizedObjectHeight,
mResizedObjectBorderLeft,
mResizedObjectBorderTop,
mResizedObjectMarginLeft,
mResizedObjectMarginTop);
if (NS_FAILED(res)) return res;
res = SetAllResizersPosition();
if (NS_FAILED(res)) return res;
return SetShadowPosition(mResizingShadow, mResizedObject,
mResizedObjectX, mResizedObjectY);
}
NS_IMETHODIMP
nsHTMLEditor::ShowResizers(nsIDOMElement *aResizedElement)
{
nsresult res = ShowResizersInner(aResizedElement);
if (NS_FAILED(res))
HideResizers();
return res;
}
nsresult
nsHTMLEditor::ShowResizersInner(nsIDOMElement *aResizedElement)
{
NS_ENSURE_ARG_POINTER(aResizedElement);
nsresult res;
nsCOMPtr<nsIDOMNode> parentNode;
res = aResizedElement->GetParentNode(getter_AddRefs(parentNode));
NS_ENSURE_SUCCESS(res, res);
if (mResizedObject) {
NS_ERROR("call HideResizers first");
return NS_ERROR_UNEXPECTED;
}
mResizedObject = aResizedElement;
// The resizers and the shadow will be anonymous siblings of the element.
res = CreateResizer(getter_AddRefs(mTopLeftHandle),
nsIHTMLObjectResizer::eTopLeft, parentNode);
if (NS_FAILED(res)) return res;
res = CreateResizer(getter_AddRefs(mTopHandle),
nsIHTMLObjectResizer::eTop, parentNode);
if (NS_FAILED(res)) return res;
res = CreateResizer(getter_AddRefs(mTopRightHandle),
nsIHTMLObjectResizer::eTopRight, parentNode);
if (NS_FAILED(res)) return res;
res = CreateResizer(getter_AddRefs(mLeftHandle),
nsIHTMLObjectResizer::eLeft, parentNode);
if (NS_FAILED(res)) return res;
res = CreateResizer(getter_AddRefs(mRightHandle),
nsIHTMLObjectResizer::eRight, parentNode);
if (NS_FAILED(res)) return res;
res = CreateResizer(getter_AddRefs(mBottomLeftHandle),
nsIHTMLObjectResizer::eBottomLeft, parentNode);
if (NS_FAILED(res)) return res;
res = CreateResizer(getter_AddRefs(mBottomHandle),
nsIHTMLObjectResizer::eBottom, parentNode);
if (NS_FAILED(res)) return res;
res = CreateResizer(getter_AddRefs(mBottomRightHandle),
nsIHTMLObjectResizer::eBottomRight, parentNode);
if (NS_FAILED(res)) return res;
res = GetPositionAndDimensions(aResizedElement,
mResizedObjectX,
mResizedObjectY,
mResizedObjectWidth,
mResizedObjectHeight,
mResizedObjectBorderLeft,
mResizedObjectBorderTop,
mResizedObjectMarginLeft,
mResizedObjectMarginTop);
if (NS_FAILED(res)) return res;
// and let's set their absolute positions in the document
res = SetAllResizersPosition();
if (NS_FAILED(res)) return res;
// now, let's create the resizing shadow
res = CreateShadow(getter_AddRefs(mResizingShadow), parentNode,
aResizedElement);
if (NS_FAILED(res)) return res;
// and set its position
res = SetShadowPosition(mResizingShadow, mResizedObject,
mResizedObjectX, mResizedObjectY);
if (NS_FAILED(res)) return res;
// and then the resizing info tooltip
res = CreateResizingInfo(getter_AddRefs(mResizingInfo), parentNode);
if (NS_FAILED(res)) return res;
// and listen to the "resize" event on the window first, get the
// window from the document...
nsCOMPtr<nsIDOMDocument> domDoc;
GetDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
if (!doc) return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(doc->GetWindow());
if (!target) { return NS_ERROR_NULL_POINTER; }
mResizeEventListenerP = new DocumentResizeEventListener(this);
if (!mResizeEventListenerP) { return NS_ERROR_OUT_OF_MEMORY; }
res = target->AddEventListener(NS_LITERAL_STRING("resize"), mResizeEventListenerP, PR_FALSE);
aResizedElement->SetAttribute(NS_LITERAL_STRING("_moz_resizing"), NS_LITERAL_STRING("true"));
return res;
}
NS_IMETHODIMP
nsHTMLEditor::HideResizers(void)
{
if (!mResizedObject)
return NS_OK;
// get the presshell's document observer interface.
nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
if (!ps) return NS_ERROR_NOT_INITIALIZED;
nsresult res;
nsCOMPtr<nsIDOMNode> parentNode;
nsCOMPtr<nsIContent> parentContent;
if (mTopLeftHandle) {
res = mTopLeftHandle->GetParentNode(getter_AddRefs(parentNode));
NS_ENSURE_SUCCESS(res, res);
parentContent = do_QueryInterface(parentNode);
}
NS_NAMED_LITERAL_STRING(mousedown, "mousedown");
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mTopLeftHandle, parentContent, ps);
mTopLeftHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mTopHandle, parentContent, ps);
mTopHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mTopRightHandle, parentContent, ps);
mTopRightHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mLeftHandle, parentContent, ps);
mLeftHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mRightHandle, parentContent, ps);
mRightHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mBottomLeftHandle, parentContent, ps);
mBottomLeftHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mBottomHandle, parentContent, ps);
mBottomHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mBottomRightHandle, parentContent, ps);
mBottomRightHandle = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mResizingShadow, parentContent, ps);
mResizingShadow = nsnull;
RemoveListenerAndDeleteRef(mousedown, mMouseListenerP, PR_TRUE,
mResizingInfo, parentContent, ps);
mResizingInfo = nsnull;
if (mActivatedHandle) {
mActivatedHandle->RemoveAttribute(NS_LITERAL_STRING("_moz_activated"));
mActivatedHandle = nsnull;
}
// don't forget to remove the listeners !
nsCOMPtr<nsPIDOMEventTarget> piTarget = GetPIDOMEventTarget();
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(piTarget);
if (target && mMouseMotionListenerP)
{
res = target->RemoveEventListener(NS_LITERAL_STRING("mousemove"),
mMouseMotionListenerP, PR_TRUE);
NS_ASSERTION(NS_SUCCEEDED(res), "failed to remove mouse motion listener");
}
mMouseMotionListenerP = nsnull;
nsCOMPtr<nsIDOMDocument> domDoc;
GetDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
if (!doc) { return NS_ERROR_NULL_POINTER; }
target = do_QueryInterface(doc->GetWindow());
if (!target) { return NS_ERROR_NULL_POINTER; }
if (mResizeEventListenerP) {
res = target->RemoveEventListener(NS_LITERAL_STRING("resize"), mResizeEventListenerP, PR_FALSE);
NS_ASSERTION(NS_SUCCEEDED(res), "failed to remove resize event listener");
}
mResizeEventListenerP = nsnull;
mResizedObject->RemoveAttribute(NS_LITERAL_STRING("_moz_resizing"));
mResizedObject = nsnull;
return NS_OK;
}
void
nsHTMLEditor::HideShadowAndInfo()
{
if (mResizingShadow)
mResizingShadow->SetAttribute(NS_LITERAL_STRING("class"), NS_LITERAL_STRING("hidden"));
if (mResizingInfo)
mResizingInfo->SetAttribute(NS_LITERAL_STRING("class"), NS_LITERAL_STRING("hidden"));
}
nsresult
nsHTMLEditor::StartResizing(nsIDOMElement *aHandle)
{
// First notify the listeners if any
PRInt32 listenersCount = objectResizeEventListeners.Count();
if (listenersCount) {
nsCOMPtr<nsIHTMLObjectResizeListener> listener;
PRInt32 index;
for (index = 0; index < listenersCount; index++) {
listener = objectResizeEventListeners[index];
listener->OnStartResizing(mResizedObject);
}
}
mIsResizing = PR_TRUE;
mActivatedHandle = aHandle;
mActivatedHandle->SetAttribute(NS_LITERAL_STRING("_moz_activated"), NS_LITERAL_STRING("true"));
// do we want to preserve ratio or not?
PRBool preserveRatio = nsHTMLEditUtils::IsImage(mResizedObject);
nsresult result;
nsCOMPtr<nsIPrefBranch> prefBranch =
do_GetService(NS_PREFSERVICE_CONTRACTID, &result);
if (NS_SUCCEEDED(result) && prefBranch && preserveRatio) {
result = prefBranch->GetBoolPref("editor.resizing.preserve_ratio", &preserveRatio);
if (NS_FAILED(result)) {
// just in case Anvil does not update its prefs file
// and because it really does not make sense to me to allow free
// resizing on corners without a modifier key
preserveRatio = PR_TRUE;
}
}
// the way we change the position/size of the shadow depends on
// the handle
nsAutoString locationStr;
aHandle->GetAttribute(NS_LITERAL_STRING("anonlocation"), locationStr);
if (locationStr.Equals(kTopLeft)) {
SetResizeIncrements(1, 1, -1, -1, preserveRatio);
}
else if (locationStr.Equals(kTop)) {
SetResizeIncrements(0, 1, 0, -1, PR_FALSE);
}
else if (locationStr.Equals(kTopRight)) {
SetResizeIncrements(0, 1, 1, -1, preserveRatio);
}
else if (locationStr.Equals(kLeft)) {
SetResizeIncrements(1, 0, -1, 0, PR_FALSE);
}
else if (locationStr.Equals(kRight)) {
SetResizeIncrements(0, 0, 1, 0, PR_FALSE);
}
else if (locationStr.Equals(kBottomLeft)) {
SetResizeIncrements(1, 0, -1, 1, preserveRatio);
}
else if (locationStr.Equals(kBottom)) {
SetResizeIncrements(0, 0, 0, 1, PR_FALSE);
}
else if (locationStr.Equals(kBottomRight)) {
SetResizeIncrements(0, 0, 1, 1, preserveRatio);
}
// make the shadow appear
mResizingShadow->RemoveAttribute(NS_LITERAL_STRING("class"));
// position it
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingShadow,
NS_LITERAL_STRING("width"),
mResizedObjectWidth);
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingShadow,
NS_LITERAL_STRING("height"),
mResizedObjectHeight);
// add a mouse move listener to the editor
if (!mMouseMotionListenerP) {
mMouseMotionListenerP = new ResizerMouseMotionListener(this);
if (!mMouseMotionListenerP) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsCOMPtr<nsPIDOMEventTarget> piTarget = GetPIDOMEventTarget();
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(piTarget);
NS_ENSURE_TRUE(target, NS_ERROR_FAILURE);
result = target->AddEventListener(NS_LITERAL_STRING("mousemove"),
mMouseMotionListenerP, PR_TRUE);
NS_ASSERTION(NS_SUCCEEDED(result),
"failed to register mouse motion listener");
}
return result;
}
NS_IMETHODIMP
nsHTMLEditor::MouseDown(PRInt32 aClientX, PRInt32 aClientY,
nsIDOMElement *aTarget, nsIDOMEvent* aEvent)
{
PRBool anonElement = PR_FALSE;
if (aTarget && NS_SUCCEEDED(aTarget->HasAttribute(NS_LITERAL_STRING("_moz_anonclass"), &anonElement)))
// we caught a click on an anonymous element
if (anonElement) {
nsAutoString anonclass;
nsresult res = aTarget->GetAttribute(NS_LITERAL_STRING("_moz_anonclass"), anonclass);
if (NS_FAILED(res)) return res;
if (anonclass.EqualsLiteral("mozResizer")) {
// and that element is a resizer, let's start resizing!
aEvent->PreventDefault();
mOriginalX = aClientX;
mOriginalY = aClientY;
return StartResizing(aTarget);
}
if (anonclass.EqualsLiteral("mozGrabber")) {
// and that element is a grabber, let's start moving the element!
mOriginalX = aClientX;
mOriginalY = aClientY;
return GrabberClicked();
}
}
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::MouseUp(PRInt32 aClientX, PRInt32 aClientY,
nsIDOMElement *aTarget)
{
if (mIsResizing) {
// we are resizing and release the mouse button, so let's
// end the resizing process
mIsResizing = PR_FALSE;
HideShadowAndInfo();
SetFinalSize(aClientX, aClientY);
}
else if (mIsMoving || mGrabberClicked) {
if (mIsMoving) {
mPositioningShadow->SetAttribute(NS_LITERAL_STRING("class"), NS_LITERAL_STRING("hidden"));
SetFinalPosition(aClientX, aClientY);
}
if (mGrabberClicked) {
EndMoving();
}
}
return NS_OK;
}
void
nsHTMLEditor::SetResizeIncrements(PRInt32 aX, PRInt32 aY,
PRInt32 aW, PRInt32 aH,
PRBool aPreserveRatio)
{
mXIncrementFactor = aX;
mYIncrementFactor = aY;
mWidthIncrementFactor = aW;
mHeightIncrementFactor = aH;
mPreserveRatio = aPreserveRatio;
}
nsresult
nsHTMLEditor::SetResizingInfoPosition(PRInt32 aX, PRInt32 aY, PRInt32 aW, PRInt32 aH)
{
nsCOMPtr<nsIDOMDocument> domdoc;
nsEditor::GetDocument(getter_AddRefs(domdoc));
NS_NAMED_LITERAL_STRING(leftStr, "left");
NS_NAMED_LITERAL_STRING(topStr, "top");
// Determine the position of the resizing info box based upon the new
// position and size of the element (aX, aY, aW, aH), and which
// resizer is the "activated handle". For example, place the resizing
// info box at the bottom-right corner of the new element, if the element
// is being resized by the bottom-right resizer.
PRInt32 infoXPosition;
PRInt32 infoYPosition;
if (mActivatedHandle == mTopLeftHandle ||
mActivatedHandle == mLeftHandle ||
mActivatedHandle == mBottomLeftHandle)
infoXPosition = aX;
else if (mActivatedHandle == mTopHandle ||
mActivatedHandle == mBottomHandle)
infoXPosition = aX + (aW / 2);
else
// should only occur when mActivatedHandle is one of the 3 right-side
// handles, but this is a reasonable default if it isn't any of them (?)
infoXPosition = aX + aW;
if (mActivatedHandle == mTopLeftHandle ||
mActivatedHandle == mTopHandle ||
mActivatedHandle == mTopRightHandle)
infoYPosition = aY;
else if (mActivatedHandle == mLeftHandle ||
mActivatedHandle == mRightHandle)
infoYPosition = aY + (aH / 2);
else
// should only occur when mActivatedHandle is one of the 3 bottom-side
// handles, but this is a reasonable default if it isn't any of them (?)
infoYPosition = aY + aH;
// Offset info box by 20 so it's not directly under the mouse cursor.
const int mouseCursorOffset = 20;
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingInfo, leftStr,
infoXPosition + mouseCursorOffset);
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingInfo, topStr,
infoYPosition + mouseCursorOffset);
nsCOMPtr<nsIDOMNode> textInfo;
nsresult res = mResizingInfo->GetFirstChild(getter_AddRefs(textInfo));
if (NS_FAILED(res)) return res;
nsCOMPtr<nsIDOMNode> junk;
if (textInfo) {
res = mResizingInfo->RemoveChild(textInfo, getter_AddRefs(junk));
if (NS_FAILED(res)) return res;
textInfo = nsnull;
junk = nsnull;
}
nsAutoString widthStr, heightStr, diffWidthStr, diffHeightStr;
widthStr.AppendInt(aW);
heightStr.AppendInt(aH);
PRInt32 diffWidth = aW - mResizedObjectWidth;
PRInt32 diffHeight = aH - mResizedObjectHeight;
if (diffWidth > 0)
diffWidthStr.AssignLiteral("+");
if (diffHeight > 0)
diffHeightStr.AssignLiteral("+");
diffWidthStr.AppendInt(diffWidth);
diffHeightStr.AppendInt(diffHeight);
nsAutoString info(widthStr + NS_LITERAL_STRING(" x ") + heightStr +
NS_LITERAL_STRING(" (") + diffWidthStr +
NS_LITERAL_STRING(", ") + diffHeightStr +
NS_LITERAL_STRING(")"));
nsCOMPtr<nsIDOMText> nodeAsText;
res = domdoc->CreateTextNode(info, getter_AddRefs(nodeAsText));
if (NS_FAILED(res)) return res;
textInfo = do_QueryInterface(nodeAsText);
res = mResizingInfo->AppendChild(textInfo, getter_AddRefs(junk));
if (NS_FAILED(res)) return res;
PRBool hasClass = PR_FALSE;
if (NS_SUCCEEDED(mResizingInfo->HasAttribute(NS_LITERAL_STRING("class"), &hasClass )) && hasClass)
res = mResizingInfo->RemoveAttribute(NS_LITERAL_STRING("class"));
return res;
}
nsresult
nsHTMLEditor::SetShadowPosition(nsIDOMElement * aShadow,
nsIDOMElement * aOriginalObject,
PRInt32 aOriginalObjectX,
PRInt32 aOriginalObjectY)
{
SetAnonymousElementPosition(aOriginalObjectX, aOriginalObjectY, aShadow);
if (nsHTMLEditUtils::IsImage(aOriginalObject)) {
nsAutoString imageSource;
nsresult res = aOriginalObject->GetAttribute(NS_LITERAL_STRING("src"),
imageSource);
if (NS_FAILED(res)) return res;
res = aShadow->SetAttribute(NS_LITERAL_STRING("src"), imageSource);
if (NS_FAILED(res)) return res;
}
return NS_OK;
}
PRInt32
nsHTMLEditor::GetNewResizingIncrement(PRInt32 aX, PRInt32 aY, PRInt32 aID)
{
PRInt32 result = 0;
if (!mPreserveRatio) {
switch (aID) {
case kX:
case kWidth:
result = aX - mOriginalX;
break;
case kY:
case kHeight:
result = aY - mOriginalY;
break;
}
return result;
}
PRInt32 xi = (aX - mOriginalX) * mWidthIncrementFactor;
PRInt32 yi = (aY - mOriginalY) * mHeightIncrementFactor;
float objectSizeRatio =
((float)mResizedObjectWidth) / ((float)mResizedObjectHeight);
result = (xi > yi) ? xi : yi;
switch (aID) {
case kX:
case kWidth:
if (result == yi)
result = (PRInt32) (((float) result) * objectSizeRatio);
result = (PRInt32) (((float) result) * mWidthIncrementFactor);
break;
case kY:
case kHeight:
if (result == xi)
result = (PRInt32) (((float) result) / objectSizeRatio);
result = (PRInt32) (((float) result) * mHeightIncrementFactor);
break;
}
return result;
}
PRInt32
nsHTMLEditor::GetNewResizingX(PRInt32 aX, PRInt32 aY)
{
PRInt32 resized = mResizedObjectX +
GetNewResizingIncrement(aX, aY, kX) * mXIncrementFactor;
PRInt32 max = mResizedObjectX + mResizedObjectWidth;
return PR_MIN(resized, max);
}
PRInt32
nsHTMLEditor::GetNewResizingY(PRInt32 aX, PRInt32 aY)
{
PRInt32 resized = mResizedObjectY +
GetNewResizingIncrement(aX, aY, kY) * mYIncrementFactor;
PRInt32 max = mResizedObjectY + mResizedObjectHeight;
return PR_MIN(resized, max);
}
PRInt32
nsHTMLEditor::GetNewResizingWidth(PRInt32 aX, PRInt32 aY)
{
PRInt32 resized = mResizedObjectWidth +
GetNewResizingIncrement(aX, aY, kWidth) *
mWidthIncrementFactor;
return PR_MAX(resized, 1);
}
PRInt32
nsHTMLEditor::GetNewResizingHeight(PRInt32 aX, PRInt32 aY)
{
PRInt32 resized = mResizedObjectHeight +
GetNewResizingIncrement(aX, aY, kHeight) *
mHeightIncrementFactor;
return PR_MAX(resized, 1);
}
NS_IMETHODIMP
nsHTMLEditor::MouseMove(nsIDOMEvent* aMouseEvent)
{
NS_NAMED_LITERAL_STRING(leftStr, "left");
NS_NAMED_LITERAL_STRING(topStr, "top");
if (mIsResizing) {
// we are resizing and the mouse pointer's position has changed
// we have to resdisplay the shadow
nsCOMPtr<nsIDOMMouseEvent> mouseEvent ( do_QueryInterface(aMouseEvent) );
PRInt32 clientX, clientY;
mouseEvent->GetClientX(&clientX);
mouseEvent->GetClientY(&clientY);
PRInt32 newX = GetNewResizingX(clientX, clientY);
PRInt32 newY = GetNewResizingY(clientX, clientY);
PRInt32 newWidth = GetNewResizingWidth(clientX, clientY);
PRInt32 newHeight = GetNewResizingHeight(clientX, clientY);
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingShadow,
leftStr,
newX);
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingShadow,
topStr,
newY);
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingShadow,
NS_LITERAL_STRING("width"),
newWidth);
mHTMLCSSUtils->SetCSSPropertyPixels(mResizingShadow,
NS_LITERAL_STRING("height"),
newHeight);
return SetResizingInfoPosition(newX, newY, newWidth, newHeight);
}
if (mGrabberClicked) {
nsCOMPtr<nsIDOMMouseEvent> mouseEvent ( do_QueryInterface(aMouseEvent) );
PRInt32 clientX, clientY;
mouseEvent->GetClientX(&clientX);
mouseEvent->GetClientY(&clientY);
nsCOMPtr<nsILookAndFeel> look = do_GetService(kLookAndFeelCID);
NS_ASSERTION(look, "Look and feel service must be implemented for this toolkit");
PRInt32 xThreshold=1, yThreshold=1;
look->GetMetric(nsILookAndFeel::eMetric_DragThresholdX, xThreshold);
look->GetMetric(nsILookAndFeel::eMetric_DragThresholdY, yThreshold);
if (PR_ABS(clientX - mOriginalX ) * 2 >= xThreshold ||
PR_ABS(clientY - mOriginalY ) * 2 >= yThreshold) {
mGrabberClicked = PR_FALSE;
StartMoving(nsnull);
}
}
if (mIsMoving) {
nsCOMPtr<nsIDOMMouseEvent> mouseEvent ( do_QueryInterface(aMouseEvent) );
PRInt32 clientX, clientY;
mouseEvent->GetClientX(&clientX);
mouseEvent->GetClientY(&clientY);
PRInt32 newX = mPositionedObjectX + clientX - mOriginalX;
PRInt32 newY = mPositionedObjectY + clientY - mOriginalY;
SnapToGrid(newX, newY);
mHTMLCSSUtils->SetCSSPropertyPixels(mPositioningShadow, leftStr, newX);
mHTMLCSSUtils->SetCSSPropertyPixels(mPositioningShadow, topStr, newY);
}
return NS_OK;
}
void
nsHTMLEditor::SetFinalSize(PRInt32 aX, PRInt32 aY)
{
if (!mResizedObject) {
// paranoia
return;
}
if (mActivatedHandle) {
mActivatedHandle->RemoveAttribute(NS_LITERAL_STRING("_moz_activated"));
mActivatedHandle = nsnull;
}
// we have now to set the new width and height of the resized object
// we don't set the x and y position because we don't control that in
// a normal HTML layout
PRInt32 left = GetNewResizingX(aX, aY);
PRInt32 top = GetNewResizingY(aX, aY);
PRInt32 width = GetNewResizingWidth(aX, aY);
PRInt32 height = GetNewResizingHeight(aX, aY);
PRBool setWidth = !mResizedObjectIsAbsolutelyPositioned || (width != mResizedObjectWidth);
PRBool setHeight = !mResizedObjectIsAbsolutelyPositioned || (height != mResizedObjectHeight);
PRInt32 x, y;
x = left - ((mResizedObjectIsAbsolutelyPositioned) ? mResizedObjectBorderLeft+mResizedObjectMarginLeft : 0);
y = top - ((mResizedObjectIsAbsolutelyPositioned) ? mResizedObjectBorderTop+mResizedObjectMarginTop : 0);
// we need to know if we're in a CSS-enabled editor or not
PRBool useCSS;
GetIsCSSEnabled(&useCSS);
// we want one transaction only from a user's point of view
nsAutoEditBatch batchIt(this);
NS_NAMED_LITERAL_STRING(widthStr, "width");
NS_NAMED_LITERAL_STRING(heightStr, "height");
PRBool hasAttr = PR_FALSE;
if (mResizedObjectIsAbsolutelyPositioned) {
if (setHeight)
mHTMLCSSUtils->SetCSSPropertyPixels(mResizedObject,
nsEditProperty::cssTop,
y,
PR_FALSE);
if (setWidth)
mHTMLCSSUtils->SetCSSPropertyPixels(mResizedObject,
nsEditProperty::cssLeft,
x,
PR_FALSE);
}
if (useCSS || mResizedObjectIsAbsolutelyPositioned) {
if (setWidth && NS_SUCCEEDED(mResizedObject->HasAttribute(widthStr, &hasAttr)) && hasAttr)
RemoveAttribute(mResizedObject, widthStr);
hasAttr = PR_FALSE;
if (setHeight && NS_SUCCEEDED(mResizedObject->HasAttribute(heightStr, &hasAttr)) && hasAttr)
RemoveAttribute(mResizedObject, heightStr);
if (setWidth)
mHTMLCSSUtils->SetCSSPropertyPixels(mResizedObject,
nsEditProperty::cssWidth,
width,
PR_FALSE);
if (setHeight)
mHTMLCSSUtils->SetCSSPropertyPixels(mResizedObject,
nsEditProperty::cssHeight,
height,
PR_FALSE);
}
else {
// we use HTML size and remove all equivalent CSS properties
// we set the CSS width and height to remove it later,
// triggering an immediate reflow; otherwise, we have problems
// with asynchronous reflow
if (setWidth)
mHTMLCSSUtils->SetCSSPropertyPixels(mResizedObject,
nsEditProperty::cssWidth,
width,
PR_FALSE);
if (setHeight)
mHTMLCSSUtils->SetCSSPropertyPixels(mResizedObject,
nsEditProperty::cssHeight,
height,
PR_FALSE);
if (setWidth) {
nsAutoString w;
w.AppendInt(width);
SetAttribute(mResizedObject, widthStr, w);
}
if (setHeight) {
nsAutoString h;
h.AppendInt(height);
SetAttribute(mResizedObject, heightStr, h);
}
if (setWidth)
mHTMLCSSUtils->RemoveCSSProperty(mResizedObject,
nsEditProperty::cssWidth,
EmptyString(),
PR_FALSE);
if (setHeight)
mHTMLCSSUtils->RemoveCSSProperty(mResizedObject,
nsEditProperty::cssHeight,
EmptyString(),
PR_FALSE);
}
// finally notify the listeners if any
PRInt32 listenersCount = objectResizeEventListeners.Count();
if (listenersCount) {
nsCOMPtr<nsIHTMLObjectResizeListener> listener;
PRInt32 index;
for (index = 0; index < listenersCount; index++) {
listener = objectResizeEventListeners[index];
listener->OnEndResizing(mResizedObject,
mResizedObjectWidth, mResizedObjectHeight,
width, height);
}
}
// keep track of that size
mResizedObjectWidth = width;
mResizedObjectHeight = height;
RefreshResizers();
}
NS_IMETHODIMP
nsHTMLEditor::GetResizedObject(nsIDOMElement * *aResizedObject)
{
*aResizedObject = mResizedObject;
NS_IF_ADDREF(*aResizedObject);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::GetObjectResizingEnabled(PRBool *aIsObjectResizingEnabled)
{
*aIsObjectResizingEnabled = mIsObjectResizingEnabled;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::SetObjectResizingEnabled(PRBool aObjectResizingEnabled)
{
mIsObjectResizingEnabled = aObjectResizingEnabled;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::AddObjectResizeEventListener(nsIHTMLObjectResizeListener * aListener)
{
NS_ENSURE_ARG_POINTER(aListener);
if (objectResizeEventListeners.Count() &&
objectResizeEventListeners.IndexOf(aListener) != -1) {
/* listener already registered */
NS_ASSERTION(PR_FALSE,
"trying to register an already registered object resize event listener");
return NS_OK;
}
objectResizeEventListeners.AppendObject(aListener);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::RemoveObjectResizeEventListener(nsIHTMLObjectResizeListener * aListener)
{
NS_ENSURE_ARG_POINTER(aListener);
if (!objectResizeEventListeners.Count() ||
objectResizeEventListeners.IndexOf(aListener) == -1) {
/* listener was not registered */
NS_ASSERTION(PR_FALSE,
"trying to remove an object resize event listener that was not already registered");
return NS_OK;
}
objectResizeEventListeners.RemoveObject(aListener);
return NS_OK;
}
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