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gecko-dev/editor/libeditor/nsHTMLObjectResizer.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsHTMLObjectResizer.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/Preferences.h"
#include "mozilla/mozalloc.h"
#include "nsAString.h"
#include "nsAlgorithm.h"
#include "nsAutoPtr.h"
#include "nsCOMArray.h"
#include "nsCOMPtr.h"
#include "nsDebug.h"
#include "nsEditorUtils.h"
#include "nsError.h"
#include "nsGkAtoms.h"
#include "nsHTMLCSSUtils.h"
#include "nsHTMLEditUtils.h"
#include "nsHTMLEditor.h"
#include "nsIAtom.h"
#include "nsIContent.h"
#include "nsID.h"
#include "nsIDOMDocument.h"
#include "nsIDOMElement.h"
#include "nsIDOMEvent.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMMouseEvent.h"
#include "nsIDOMNode.h"
#include "nsIDOMText.h"
#include "nsIDocument.h"
#include "nsIEditor.h"
#include "nsIHTMLEditor.h"
#include "nsIHTMLObjectResizeListener.h"
#include "nsIHTMLObjectResizer.h"
#include "nsIPresShell.h"
#include "nsISupportsUtils.h"
#include "nsPIDOMWindow.h"
#include "nsReadableUtils.h"
#include "nsString.h"
#include "nsStringFwd.h"
#include "nsSubstringTuple.h"
#include "nscore.h"
#include <algorithm>
class nsISelection;
using namespace mozilla;
using namespace mozilla::dom;
class nsHTMLEditUtils;
// ==================================================================
// DocumentResizeEventListener
// ==================================================================
NS_IMPL_ISUPPORTS(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_ISUPPORTS(ResizerSelectionListener, nsISelectionListener)
ResizerSelectionListener::ResizerSelectionListener(nsIHTMLEditor * aEditor)
{
mEditor = do_GetWeakReference(aEditor);
}
ResizerSelectionListener::~ResizerSelectionListener()
{
}
NS_IMETHODIMP
ResizerSelectionListener::NotifySelectionChanged(nsIDOMDocument *, nsISelection *aSelection, int16_t 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_ISUPPORTS(ResizerMouseMotionListener, nsIDOMEventListener)
ResizerMouseMotionListener::ResizerMouseMotionListener(nsIHTMLEditor * aEditor)
{
mEditor = do_GetWeakReference(aEditor);
}
ResizerMouseMotionListener::~ResizerMouseMotionListener()
{
}
NS_IMETHODIMP
ResizerMouseMotionListener::HandleEvent(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;
}
// ==================================================================
// nsHTMLEditor
// ==================================================================
already_AddRefed<Element>
nsHTMLEditor::CreateResizer(int16_t aLocation, nsIDOMNode* aParentNode)
{
nsCOMPtr<nsIDOMElement> retDOM;
nsresult res = CreateAnonymousElement(NS_LITERAL_STRING("span"),
aParentNode,
NS_LITERAL_STRING("mozResizer"),
false,
getter_AddRefs(retDOM));
NS_ENSURE_SUCCESS(res, nullptr);
NS_ENSURE_TRUE(retDOM, nullptr);
// add the mouse listener so we can detect a click on a resizer
nsCOMPtr<nsIDOMEventTarget> evtTarget = do_QueryInterface(retDOM);
evtTarget->AddEventListener(NS_LITERAL_STRING("mousedown"), mEventListener,
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;
}
nsCOMPtr<Element> ret = do_QueryInterface(retDOM);
res = ret->SetAttr(kNameSpaceID_None, nsGkAtoms::anonlocation, locationStr,
true);
NS_ENSURE_SUCCESS(res, nullptr);
return ret.forget();
}
already_AddRefed<Element>
nsHTMLEditor::CreateShadow(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");
nsCOMPtr<nsIDOMElement> retDOM;
CreateAnonymousElement(name, aParentNode,
NS_LITERAL_STRING("mozResizingShadow"), true,
getter_AddRefs(retDOM));
NS_ENSURE_TRUE(retDOM, nullptr);
nsCOMPtr<Element> ret = do_QueryInterface(retDOM);
return ret.forget();
}
already_AddRefed<Element>
nsHTMLEditor::CreateResizingInfo(nsIDOMNode* aParentNode)
{
// let's create an info box through the element factory
nsCOMPtr<nsIDOMElement> retDOM;
CreateAnonymousElement(NS_LITERAL_STRING("span"), aParentNode,
NS_LITERAL_STRING("mozResizingInfo"), true,
getter_AddRefs(retDOM));
nsCOMPtr<Element> ret = do_QueryInterface(retDOM);
return ret.forget();
}
nsresult
nsHTMLEditor::SetAllResizersPosition()
{
NS_ENSURE_TRUE(mTopLeftHandle, NS_ERROR_FAILURE);
int32_t x = mResizedObjectX;
int32_t y = mResizedObjectY;
int32_t w = mResizedObjectWidth;
int32_t 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, *nsGkAtoms::width,
value);
mHTMLCSSUtils->ParseLength(value, &resizerWidth, getter_AddRefs(dummyUnit));
mHTMLCSSUtils->GetComputedProperty(*mTopLeftHandle, *nsGkAtoms::height,
value);
mHTMLCSSUtils->ParseLength(value, &resizerHeight, getter_AddRefs(dummyUnit));
int32_t rw = (int32_t)((resizerWidth + 1) / 2);
int32_t rh = (int32_t)((resizerHeight+ 1) / 2);
SetAnonymousElementPosition(x-rw, y-rh, static_cast<nsIDOMElement*>(GetAsDOMNode(mTopLeftHandle)));
SetAnonymousElementPosition(x+w/2-rw, y-rh, static_cast<nsIDOMElement*>(GetAsDOMNode(mTopHandle)));
SetAnonymousElementPosition(x+w-rw-1, y-rh, static_cast<nsIDOMElement*>(GetAsDOMNode(mTopRightHandle)));
SetAnonymousElementPosition(x-rw, y+h/2-rh, static_cast<nsIDOMElement*>(GetAsDOMNode(mLeftHandle)));
SetAnonymousElementPosition(x+w-rw-1, y+h/2-rh, static_cast<nsIDOMElement*>(GetAsDOMNode(mRightHandle)));
SetAnonymousElementPosition(x-rw, y+h-rh-1, static_cast<nsIDOMElement*>(GetAsDOMNode(mBottomLeftHandle)));
SetAnonymousElementPosition(x+w/2-rw, y+h-rh-1, static_cast<nsIDOMElement*>(GetAsDOMNode(mBottomHandle)));
SetAnonymousElementPosition(x+w-rw-1, y+h-rh-1, static_cast<nsIDOMElement*>(GetAsDOMNode(mBottomRightHandle)));
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::RefreshResizers()
{
// nothing to do if resizers are not displayed...
NS_ENSURE_TRUE(mResizedObject, NS_OK);
nsresult res = GetPositionAndDimensions(static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject)),
mResizedObjectX,
mResizedObjectY,
mResizedObjectWidth,
mResizedObjectHeight,
mResizedObjectBorderLeft,
mResizedObjectBorderTop,
mResizedObjectMarginLeft,
mResizedObjectMarginTop);
NS_ENSURE_SUCCESS(res, res);
res = SetAllResizersPosition();
NS_ENSURE_SUCCESS(res, 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 = do_QueryInterface(aResizedElement);
NS_ENSURE_STATE(mResizedObject);
// The resizers and the shadow will be anonymous siblings of the element.
mTopLeftHandle = CreateResizer(nsIHTMLObjectResizer::eTopLeft, parentNode);
NS_ENSURE_TRUE(mTopLeftHandle, NS_ERROR_FAILURE);
mTopHandle = CreateResizer(nsIHTMLObjectResizer::eTop, parentNode);
NS_ENSURE_TRUE(mTopHandle, NS_ERROR_FAILURE);
mTopRightHandle = CreateResizer(nsIHTMLObjectResizer::eTopRight, parentNode);
NS_ENSURE_TRUE(mTopRightHandle, NS_ERROR_FAILURE);
mLeftHandle = CreateResizer(nsIHTMLObjectResizer::eLeft, parentNode);
NS_ENSURE_TRUE(mLeftHandle, NS_ERROR_FAILURE);
mRightHandle = CreateResizer(nsIHTMLObjectResizer::eRight, parentNode);
NS_ENSURE_TRUE(mRightHandle, NS_ERROR_FAILURE);
mBottomLeftHandle = CreateResizer(nsIHTMLObjectResizer::eBottomLeft, parentNode);
NS_ENSURE_TRUE(mBottomLeftHandle, NS_ERROR_FAILURE);
mBottomHandle = CreateResizer(nsIHTMLObjectResizer::eBottom, parentNode);
NS_ENSURE_TRUE(mBottomHandle, NS_ERROR_FAILURE);
mBottomRightHandle = CreateResizer(nsIHTMLObjectResizer::eBottomRight, parentNode);
NS_ENSURE_TRUE(mBottomRightHandle, NS_ERROR_FAILURE);
res = GetPositionAndDimensions(aResizedElement,
mResizedObjectX,
mResizedObjectY,
mResizedObjectWidth,
mResizedObjectHeight,
mResizedObjectBorderLeft,
mResizedObjectBorderTop,
mResizedObjectMarginLeft,
mResizedObjectMarginTop);
NS_ENSURE_SUCCESS(res, res);
// and let's set their absolute positions in the document
res = SetAllResizersPosition();
NS_ENSURE_SUCCESS(res, res);
// now, let's create the resizing shadow
mResizingShadow = CreateShadow(parentNode, aResizedElement);
NS_ENSURE_TRUE(mResizingShadow, NS_ERROR_FAILURE);
// and set its position
res = SetShadowPosition(mResizingShadow, mResizedObject,
mResizedObjectX, mResizedObjectY);
NS_ENSURE_SUCCESS(res, res);
// and then the resizing info tooltip
mResizingInfo = CreateResizingInfo(parentNode);
NS_ENSURE_TRUE(mResizingInfo, NS_ERROR_FAILURE);
// and listen to the "resize" event on the window first, get the
// window from the document...
nsCOMPtr<nsIDocument> doc = GetDocument();
NS_ENSURE_TRUE(doc, 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, false);
aResizedElement->SetAttribute(NS_LITERAL_STRING("_moz_resizing"), NS_LITERAL_STRING("true"));
return res;
}
NS_IMETHODIMP
nsHTMLEditor::HideResizers(void)
{
NS_ENSURE_TRUE(mResizedObject, NS_OK);
// get the presshell's document observer interface.
nsCOMPtr<nsIPresShell> ps = GetPresShell();
// We allow the pres shell to be null; when it is, we presume there
// are no document observers to notify, but we still want to
// UnbindFromTree.
nsCOMPtr<nsIContent> parentContent;
if (mTopLeftHandle) {
parentContent = mTopLeftHandle->GetParent();
}
NS_NAMED_LITERAL_STRING(mousedown, "mousedown");
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mTopLeftHandle, parentContent, ps);
mTopLeftHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mTopHandle, parentContent, ps);
mTopHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mTopRightHandle, parentContent, ps);
mTopRightHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mLeftHandle, parentContent, ps);
mLeftHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mRightHandle, parentContent, ps);
mRightHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mBottomLeftHandle, parentContent, ps);
mBottomLeftHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mBottomHandle, parentContent, ps);
mBottomHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mBottomRightHandle, parentContent, ps);
mBottomRightHandle = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mResizingShadow, parentContent, ps);
mResizingShadow = nullptr;
RemoveListenerAndDeleteRef(mousedown, mEventListener, true,
mResizingInfo, parentContent, ps);
mResizingInfo = nullptr;
if (mActivatedHandle) {
mActivatedHandle->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_moz_activated,
true);
mActivatedHandle = nullptr;
}
// don't forget to remove the listeners !
nsCOMPtr<nsIDOMEventTarget> target = GetDOMEventTarget();
DebugOnly<nsresult> res;
if (target && mMouseMotionListenerP)
{
res = target->RemoveEventListener(NS_LITERAL_STRING("mousemove"),
mMouseMotionListenerP, true);
NS_ASSERTION(NS_SUCCEEDED(res), "failed to remove mouse motion listener");
}
mMouseMotionListenerP = nullptr;
nsCOMPtr<nsIDocument> doc = GetDocument();
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, false);
NS_ASSERTION(NS_SUCCEEDED(res), "failed to remove resize event listener");
}
mResizeEventListenerP = nullptr;
mResizedObject->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_moz_resizing, true);
mResizedObject = nullptr;
return NS_OK;
}
void
nsHTMLEditor::HideShadowAndInfo()
{
if (mResizingShadow)
mResizingShadow->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
NS_LITERAL_STRING("hidden"), true);
if (mResizingInfo)
mResizingInfo->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
NS_LITERAL_STRING("hidden"), true);
}
nsresult
nsHTMLEditor::StartResizing(nsIDOMElement *aHandle)
{
// First notify the listeners if any
int32_t listenersCount = objectResizeEventListeners.Count();
if (listenersCount) {
nsCOMPtr<nsIHTMLObjectResizeListener> listener;
int32_t index;
for (index = 0; index < listenersCount; index++) {
listener = objectResizeEventListeners[index];
listener->OnStartResizing(static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject)));
}
}
mIsResizing = true;
mActivatedHandle = do_QueryInterface(aHandle);
NS_ENSURE_STATE(mActivatedHandle || !aHandle);
mActivatedHandle->SetAttr(kNameSpaceID_None, nsGkAtoms::_moz_activated,
NS_LITERAL_STRING("true"), true);
// do we want to preserve ratio or not?
bool preserveRatio = nsHTMLEditUtils::IsImage(mResizedObject) &&
Preferences::GetBool("editor.resizing.preserve_ratio", 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, false);
}
else if (locationStr.Equals(kTopRight)) {
SetResizeIncrements(0, 1, 1, -1, preserveRatio);
}
else if (locationStr.Equals(kLeft)) {
SetResizeIncrements(1, 0, -1, 0, false);
}
else if (locationStr.Equals(kRight)) {
SetResizeIncrements(0, 0, 1, 0, false);
}
else if (locationStr.Equals(kBottomLeft)) {
SetResizeIncrements(1, 0, -1, 1, preserveRatio);
}
else if (locationStr.Equals(kBottom)) {
SetResizeIncrements(0, 0, 0, 1, false);
}
else if (locationStr.Equals(kBottomRight)) {
SetResizeIncrements(0, 0, 1, 1, preserveRatio);
}
// make the shadow appear
mResizingShadow->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_class, true);
// position it
mHTMLCSSUtils->SetCSSPropertyPixels(*mResizingShadow, *nsGkAtoms::width,
mResizedObjectWidth);
mHTMLCSSUtils->SetCSSPropertyPixels(*mResizingShadow, *nsGkAtoms::height,
mResizedObjectHeight);
// add a mouse move listener to the editor
nsresult result = NS_OK;
if (!mMouseMotionListenerP) {
mMouseMotionListenerP = new ResizerMouseMotionListener(this);
if (!mMouseMotionListenerP) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsCOMPtr<nsIDOMEventTarget> target = GetDOMEventTarget();
NS_ENSURE_TRUE(target, NS_ERROR_FAILURE);
result = target->AddEventListener(NS_LITERAL_STRING("mousemove"),
mMouseMotionListenerP, true);
NS_ASSERTION(NS_SUCCEEDED(result),
"failed to register mouse motion listener");
}
return result;
}
NS_IMETHODIMP
nsHTMLEditor::MouseDown(int32_t aClientX, int32_t aClientY,
nsIDOMElement *aTarget, nsIDOMEvent* aEvent)
{
bool anonElement = 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);
NS_ENSURE_SUCCESS(res, 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(int32_t aClientX, int32_t aClientY,
nsIDOMElement *aTarget)
{
if (mIsResizing) {
// we are resizing and release the mouse button, so let's
// end the resizing process
mIsResizing = false;
HideShadowAndInfo();
SetFinalSize(aClientX, aClientY);
}
else if (mIsMoving || mGrabberClicked) {
if (mIsMoving) {
mPositioningShadow->SetAttr(kNameSpaceID_None, nsGkAtoms::_class,
NS_LITERAL_STRING("hidden"), true);
SetFinalPosition(aClientX, aClientY);
}
if (mGrabberClicked) {
EndMoving();
}
}
return NS_OK;
}
void
nsHTMLEditor::SetResizeIncrements(int32_t aX, int32_t aY,
int32_t aW, int32_t aH,
bool aPreserveRatio)
{
mXIncrementFactor = aX;
mYIncrementFactor = aY;
mWidthIncrementFactor = aW;
mHeightIncrementFactor = aH;
mPreserveRatio = aPreserveRatio;
}
nsresult
nsHTMLEditor::SetResizingInfoPosition(int32_t aX, int32_t aY, int32_t aW, int32_t aH)
{
nsCOMPtr<nsIDOMDocument> domdoc = GetDOMDocument();
// 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.
int32_t infoXPosition;
int32_t 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, *nsGkAtoms::left,
infoXPosition + mouseCursorOffset);
mHTMLCSSUtils->SetCSSPropertyPixels(*mResizingInfo, *nsGkAtoms::top,
infoYPosition + mouseCursorOffset);
nsCOMPtr<nsIContent> textInfo = mResizingInfo->GetFirstChild();
ErrorResult rv;
if (textInfo) {
mResizingInfo->RemoveChild(*textInfo, rv);
NS_ENSURE_SUCCESS(rv.ErrorCode(), rv.ErrorCode());
textInfo = nullptr;
}
nsAutoString widthStr, heightStr, diffWidthStr, diffHeightStr;
widthStr.AppendInt(aW);
heightStr.AppendInt(aH);
int32_t diffWidth = aW - mResizedObjectWidth;
int32_t diffHeight = aH - mResizedObjectHeight;
if (diffWidth > 0)
diffWidthStr.Assign('+');
if (diffHeight > 0)
diffHeightStr.Assign('+');
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;
nsresult res = domdoc->CreateTextNode(info, getter_AddRefs(nodeAsText));
NS_ENSURE_SUCCESS(res, res);
textInfo = do_QueryInterface(nodeAsText);
mResizingInfo->AppendChild(*textInfo, rv);
NS_ENSURE_SUCCESS(rv.ErrorCode(), rv.ErrorCode());
res = mResizingInfo->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_class, true);
return res;
}
nsresult
nsHTMLEditor::SetShadowPosition(Element* aShadow,
Element* aOriginalObject,
int32_t aOriginalObjectX,
int32_t aOriginalObjectY)
{
SetAnonymousElementPosition(aOriginalObjectX, aOriginalObjectY, static_cast<nsIDOMElement*>(GetAsDOMNode(aShadow)));
if (nsHTMLEditUtils::IsImage(aOriginalObject)) {
nsAutoString imageSource;
aOriginalObject->GetAttr(kNameSpaceID_None, nsGkAtoms::src, imageSource);
nsresult res = aShadow->SetAttr(kNameSpaceID_None, nsGkAtoms::src,
imageSource, true);
NS_ENSURE_SUCCESS(res, res);
}
return NS_OK;
}
int32_t
nsHTMLEditor::GetNewResizingIncrement(int32_t aX, int32_t aY, int32_t aID)
{
int32_t result = 0;
if (!mPreserveRatio) {
switch (aID) {
case kX:
case kWidth:
result = aX - mOriginalX;
break;
case kY:
case kHeight:
result = aY - mOriginalY;
break;
}
return result;
}
int32_t xi = (aX - mOriginalX) * mWidthIncrementFactor;
int32_t 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 = (int32_t) (((float) result) * objectSizeRatio);
result = (int32_t) (((float) result) * mWidthIncrementFactor);
break;
case kY:
case kHeight:
if (result == xi)
result = (int32_t) (((float) result) / objectSizeRatio);
result = (int32_t) (((float) result) * mHeightIncrementFactor);
break;
}
return result;
}
int32_t
nsHTMLEditor::GetNewResizingX(int32_t aX, int32_t aY)
{
int32_t resized = mResizedObjectX +
GetNewResizingIncrement(aX, aY, kX) * mXIncrementFactor;
int32_t max = mResizedObjectX + mResizedObjectWidth;
return std::min(resized, max);
}
int32_t
nsHTMLEditor::GetNewResizingY(int32_t aX, int32_t aY)
{
int32_t resized = mResizedObjectY +
GetNewResizingIncrement(aX, aY, kY) * mYIncrementFactor;
int32_t max = mResizedObjectY + mResizedObjectHeight;
return std::min(resized, max);
}
int32_t
nsHTMLEditor::GetNewResizingWidth(int32_t aX, int32_t aY)
{
int32_t resized = mResizedObjectWidth +
GetNewResizingIncrement(aX, aY, kWidth) *
mWidthIncrementFactor;
return std::max(resized, 1);
}
int32_t
nsHTMLEditor::GetNewResizingHeight(int32_t aX, int32_t aY)
{
int32_t resized = mResizedObjectHeight +
GetNewResizingIncrement(aX, aY, kHeight) *
mHeightIncrementFactor;
return std::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) );
int32_t clientX, clientY;
mouseEvent->GetClientX(&clientX);
mouseEvent->GetClientY(&clientY);
int32_t newX = GetNewResizingX(clientX, clientY);
int32_t newY = GetNewResizingY(clientX, clientY);
int32_t newWidth = GetNewResizingWidth(clientX, clientY);
int32_t newHeight = GetNewResizingHeight(clientX, clientY);
mHTMLCSSUtils->SetCSSPropertyPixels(*mResizingShadow, *nsGkAtoms::left,
newX);
mHTMLCSSUtils->SetCSSPropertyPixels(*mResizingShadow, *nsGkAtoms::top,
newY);
mHTMLCSSUtils->SetCSSPropertyPixels(*mResizingShadow, *nsGkAtoms::width,
newWidth);
mHTMLCSSUtils->SetCSSPropertyPixels(*mResizingShadow, *nsGkAtoms::height,
newHeight);
return SetResizingInfoPosition(newX, newY, newWidth, newHeight);
}
if (mGrabberClicked) {
nsCOMPtr<nsIDOMMouseEvent> mouseEvent ( do_QueryInterface(aMouseEvent) );
int32_t clientX, clientY;
mouseEvent->GetClientX(&clientX);
mouseEvent->GetClientY(&clientY);
int32_t xThreshold =
LookAndFeel::GetInt(LookAndFeel::eIntID_DragThresholdX, 1);
int32_t yThreshold =
LookAndFeel::GetInt(LookAndFeel::eIntID_DragThresholdY, 1);
if (DeprecatedAbs(clientX - mOriginalX) * 2 >= xThreshold ||
DeprecatedAbs(clientY - mOriginalY) * 2 >= yThreshold) {
mGrabberClicked = false;
StartMoving(nullptr);
}
}
if (mIsMoving) {
nsCOMPtr<nsIDOMMouseEvent> mouseEvent ( do_QueryInterface(aMouseEvent) );
int32_t clientX, clientY;
mouseEvent->GetClientX(&clientX);
mouseEvent->GetClientY(&clientY);
int32_t newX = mPositionedObjectX + clientX - mOriginalX;
int32_t newY = mPositionedObjectY + clientY - mOriginalY;
SnapToGrid(newX, newY);
mHTMLCSSUtils->SetCSSPropertyPixels(*mPositioningShadow, *nsGkAtoms::left,
newX);
mHTMLCSSUtils->SetCSSPropertyPixels(*mPositioningShadow, *nsGkAtoms::top,
newY);
}
return NS_OK;
}
void
nsHTMLEditor::SetFinalSize(int32_t aX, int32_t aY)
{
if (!mResizedObject) {
// paranoia
return;
}
if (mActivatedHandle) {
mActivatedHandle->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_moz_activated, true);
mActivatedHandle = nullptr;
}
// 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
int32_t left = GetNewResizingX(aX, aY);
int32_t top = GetNewResizingY(aX, aY);
int32_t width = GetNewResizingWidth(aX, aY);
int32_t height = GetNewResizingHeight(aX, aY);
bool setWidth = !mResizedObjectIsAbsolutelyPositioned || (width != mResizedObjectWidth);
bool setHeight = !mResizedObjectIsAbsolutelyPositioned || (height != mResizedObjectHeight);
int32_t x, y;
x = left - ((mResizedObjectIsAbsolutelyPositioned) ? mResizedObjectBorderLeft+mResizedObjectMarginLeft : 0);
y = top - ((mResizedObjectIsAbsolutelyPositioned) ? mResizedObjectBorderTop+mResizedObjectMarginTop : 0);
// 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");
nsCOMPtr<Element> resizedObject = do_QueryInterface(mResizedObject);
NS_ENSURE_TRUE(resizedObject, );
if (mResizedObjectIsAbsolutelyPositioned) {
if (setHeight)
mHTMLCSSUtils->SetCSSPropertyPixels(*resizedObject, *nsGkAtoms::top, y);
if (setWidth)
mHTMLCSSUtils->SetCSSPropertyPixels(*resizedObject, *nsGkAtoms::left, x);
}
if (IsCSSEnabled() || mResizedObjectIsAbsolutelyPositioned) {
if (setWidth && mResizedObject->HasAttr(kNameSpaceID_None, nsGkAtoms::width)) {
RemoveAttribute(static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject)), widthStr);
}
if (setHeight && mResizedObject->HasAttr(kNameSpaceID_None,
nsGkAtoms::height)) {
RemoveAttribute(static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject)), heightStr);
}
if (setWidth)
mHTMLCSSUtils->SetCSSPropertyPixels(*resizedObject, *nsGkAtoms::width,
width);
if (setHeight)
mHTMLCSSUtils->SetCSSPropertyPixels(*resizedObject, *nsGkAtoms::height,
height);
}
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(*resizedObject, *nsGkAtoms::width,
width);
if (setHeight)
mHTMLCSSUtils->SetCSSPropertyPixels(*resizedObject, *nsGkAtoms::height,
height);
if (setWidth) {
nsAutoString w;
w.AppendInt(width);
SetAttribute(static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject)), widthStr, w);
}
if (setHeight) {
nsAutoString h;
h.AppendInt(height);
SetAttribute(static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject)), heightStr, h);
}
if (setWidth)
mHTMLCSSUtils->RemoveCSSProperty(*resizedObject, *nsGkAtoms::width,
EmptyString());
if (setHeight)
mHTMLCSSUtils->RemoveCSSProperty(*resizedObject, *nsGkAtoms::height,
EmptyString());
}
// finally notify the listeners if any
int32_t listenersCount = objectResizeEventListeners.Count();
if (listenersCount) {
nsCOMPtr<nsIHTMLObjectResizeListener> listener;
int32_t index;
for (index = 0; index < listenersCount; index++) {
listener = objectResizeEventListeners[index];
listener->OnEndResizing(static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject)),
mResizedObjectWidth, mResizedObjectHeight,
width, height);
}
}
// keep track of that size
mResizedObjectWidth = width;
mResizedObjectHeight = height;
RefreshResizers();
}
NS_IMETHODIMP
nsHTMLEditor::GetResizedObject(nsIDOMElement * *aResizedObject)
{
nsCOMPtr<nsIDOMElement> ret = static_cast<nsIDOMElement*>(GetAsDOMNode(mResizedObject));
ret.forget(aResizedObject);
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::GetObjectResizingEnabled(bool *aIsObjectResizingEnabled)
{
*aIsObjectResizingEnabled = mIsObjectResizingEnabled;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLEditor::SetObjectResizingEnabled(bool 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(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(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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