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gecko-dev/editor/libeditor/base/nsEditorEventListener.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=4 sw=2 et tw=78: */
/* ***** 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):
* Pierre Phaneuf <pp@ludusdesign.com>
* Masayuki Nakano <masayuki@d-toybox.com>
*
* 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 ***** */
#include "nsEditorEventListener.h"
#include "nsEditor.h"
#include "nsIDOMDOMStringList.h"
#include "nsIDOMEvent.h"
#include "nsIDOMNSEvent.h"
#include "nsIDOMDocument.h"
#include "nsIDOMEventTarget.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsISelection.h"
#include "nsISelectionController.h"
#include "nsIDOMKeyEvent.h"
#include "nsIDOMMouseEvent.h"
#include "nsIDOMNSUIEvent.h"
#include "nsIPrivateTextEvent.h"
#include "nsIEditorMailSupport.h"
#include "nsILookAndFeel.h"
#include "nsFocusManager.h"
#include "nsEventListenerManager.h"
#include "mozilla/Preferences.h"
// Drag & Drop, Clipboard
#include "nsIServiceManager.h"
#include "nsIClipboard.h"
#include "nsIDragService.h"
#include "nsIDragSession.h"
#include "nsIContent.h"
#include "nsISupportsPrimitives.h"
#include "nsIDOMNSRange.h"
#include "nsEditorUtils.h"
#include "nsISelectionPrivate.h"
#include "nsIDOMDragEvent.h"
#include "nsIFocusManager.h"
#include "nsIDOMWindow.h"
#include "nsContentUtils.h"
using namespace mozilla;
class nsAutoEditorKeypressOperation {
public:
nsAutoEditorKeypressOperation(nsEditor *aEditor, nsIDOMNSEvent *aEvent)
: mEditor(aEditor) {
mEditor->BeginKeypressHandling(aEvent);
}
~nsAutoEditorKeypressOperation() {
mEditor->EndKeypressHandling();
}
private:
nsEditor *mEditor;
};
nsEditorEventListener::nsEditorEventListener() :
mEditor(nsnull), mCommitText(PR_FALSE),
mInTransaction(PR_FALSE)
{
}
nsEditorEventListener::~nsEditorEventListener()
{
if (mEditor) {
NS_WARNING("We're not uninstalled");
Disconnect();
}
}
nsresult
nsEditorEventListener::Connect(nsEditor* aEditor)
{
NS_ENSURE_ARG(aEditor);
mEditor = aEditor;
nsresult rv = InstallToEditor();
if (NS_FAILED(rv)) {
Disconnect();
}
return rv;
}
nsresult
nsEditorEventListener::InstallToEditor()
{
NS_PRECONDITION(mEditor, "The caller must set mEditor");
nsCOMPtr<nsIDOMEventTarget> piTarget = mEditor->GetDOMEventTarget();
NS_ENSURE_TRUE(piTarget, NS_ERROR_FAILURE);
nsresult rv;
// register the event listeners with the listener manager
nsEventListenerManager* elmP = piTarget->GetListenerManager(PR_TRUE);
NS_ENSURE_STATE(elmP);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("keypress"),
NS_EVENT_FLAG_BUBBLE |
NS_PRIV_EVENT_UNTRUSTED_PERMITTED |
NS_EVENT_FLAG_SYSTEM_EVENT);
NS_ENSURE_SUCCESS(rv, rv);
// See bug 455215, we cannot use the standard dragstart event yet
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("draggesture"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("dragenter"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("dragover"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("dragexit"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("drop"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("mousedown"),
NS_EVENT_FLAG_CAPTURE);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("mouseup"),
NS_EVENT_FLAG_CAPTURE);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("click"),
NS_EVENT_FLAG_CAPTURE);
NS_ENSURE_SUCCESS(rv, rv);
// Focus event doesn't bubble so adding the listener to capturing phase.
// Make sure this works after bug 235441 gets fixed.
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("blur"),
NS_EVENT_FLAG_CAPTURE);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("focus"),
NS_EVENT_FLAG_CAPTURE);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("text"),
NS_EVENT_FLAG_BUBBLE);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("compositionstart"),
NS_EVENT_FLAG_BUBBLE);
NS_ENSURE_SUCCESS(rv, rv);
rv = elmP->AddEventListenerByType(this,
NS_LITERAL_STRING("compositionend"),
NS_EVENT_FLAG_BUBBLE);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
void
nsEditorEventListener::Disconnect()
{
if (!mEditor) {
return;
}
UninstallFromEditor();
mEditor = nsnull;
}
void
nsEditorEventListener::UninstallFromEditor()
{
nsCOMPtr<nsIDOMEventTarget> piTarget = mEditor->GetDOMEventTarget();
if (!piTarget) {
return;
}
nsEventListenerManager* elmP =
piTarget->GetListenerManager(PR_TRUE);
if (!elmP) {
return;
}
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("keypress"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("draggesture"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("dragenter"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("dragover"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("dragexit"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("drop"),
NS_EVENT_FLAG_BUBBLE |
NS_EVENT_FLAG_SYSTEM_EVENT);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("mousedown"),
NS_EVENT_FLAG_CAPTURE);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("mouseup"),
NS_EVENT_FLAG_CAPTURE);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("click"),
NS_EVENT_FLAG_CAPTURE);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("blur"),
NS_EVENT_FLAG_CAPTURE);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("focus"),
NS_EVENT_FLAG_CAPTURE);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("text"),
NS_EVENT_FLAG_BUBBLE);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("compositionstart"),
NS_EVENT_FLAG_BUBBLE);
elmP->RemoveEventListenerByType(this,
NS_LITERAL_STRING("compositionend"),
NS_EVENT_FLAG_BUBBLE);
}
already_AddRefed<nsIPresShell>
nsEditorEventListener::GetPresShell()
{
NS_PRECONDITION(mEditor,
"The caller must check whether this is connected to an editor");
return mEditor->GetPresShell();
}
/**
* nsISupports implementation
*/
NS_IMPL_ISUPPORTS1(nsEditorEventListener, nsIDOMEventListener)
/**
* nsIDOMEventListener implementation
*/
NS_IMETHODIMP
nsEditorEventListener::HandleEvent(nsIDOMEvent* aEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
nsAutoString eventType;
aEvent->GetType(eventType);
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
if (dragEvent) {
if (eventType.EqualsLiteral("draggesture"))
return DragGesture(dragEvent);
if (eventType.EqualsLiteral("dragenter"))
return DragEnter(dragEvent);
if (eventType.EqualsLiteral("dragover"))
return DragOver(dragEvent);
if (eventType.EqualsLiteral("dragexit"))
return DragExit(dragEvent);
if (eventType.EqualsLiteral("drop"))
return Drop(dragEvent);
}
if (eventType.EqualsLiteral("keypress"))
return KeyPress(aEvent);
if (eventType.EqualsLiteral("mousedown"))
return MouseDown(aEvent);
if (eventType.EqualsLiteral("mouseup"))
return MouseUp(aEvent);
if (eventType.EqualsLiteral("click"))
return MouseClick(aEvent);
if (eventType.EqualsLiteral("focus"))
return Focus(aEvent);
if (eventType.EqualsLiteral("blur"))
return Blur(aEvent);
if (eventType.EqualsLiteral("text"))
return HandleText(aEvent);
if (eventType.EqualsLiteral("compositionstart"))
return HandleStartComposition(aEvent);
if (eventType.EqualsLiteral("compositionend"))
return HandleEndComposition(aEvent);
return NS_OK;
}
NS_IMETHODIMP
nsEditorEventListener::KeyPress(nsIDOMEvent* aKeyEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
if (!mEditor->IsAcceptableInputEvent(aKeyEvent)) {
return NS_OK;
}
// Transfer the event's trusted-ness to our editor
nsCOMPtr<nsIDOMNSEvent> NSEvent = do_QueryInterface(aKeyEvent);
nsAutoEditorKeypressOperation operation(mEditor, NSEvent);
// DOM event handling happens in two passes, the client pass and the system
// pass. We do all of our processing in the system pass, to allow client
// handlers the opportunity to cancel events and prevent typing in the editor.
// If the client pass cancelled the event, defaultPrevented will be true
// below.
nsCOMPtr<nsIDOMNSUIEvent> UIEvent = do_QueryInterface(aKeyEvent);
if(UIEvent) {
PRBool defaultPrevented;
UIEvent->GetPreventDefault(&defaultPrevented);
if(defaultPrevented) {
return NS_OK;
}
}
nsCOMPtr<nsIDOMKeyEvent>keyEvent = do_QueryInterface(aKeyEvent);
if (!keyEvent) {
//non-key event passed to keypress. bad things.
return NS_OK;
}
return mEditor->HandleKeyPressEvent(keyEvent);
}
NS_IMETHODIMP
nsEditorEventListener::MouseClick(nsIDOMEvent* aMouseEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aMouseEvent);
nsCOMPtr<nsIDOMNSEvent> nsevent = do_QueryInterface(aMouseEvent);
PRBool isTrusted = PR_FALSE;
if (!mouseEvent || !nsevent ||
NS_FAILED(nsevent->GetIsTrusted(&isTrusted)) || !isTrusted) {
// Non-ui or non-trusted event passed in. Bad things.
return NS_OK;
}
nsresult rv;
nsCOMPtr<nsIDOMNSUIEvent> nsuiEvent = do_QueryInterface(aMouseEvent);
NS_ENSURE_TRUE(nsuiEvent, NS_ERROR_NULL_POINTER);
PRBool preventDefault;
rv = nsuiEvent->GetPreventDefault(&preventDefault);
if (NS_FAILED(rv) || preventDefault)
{
// We're done if 'preventdefault' is true (see for example bug 70698).
return rv;
}
// If we got a mouse down inside the editing area, we should force the
// IME to commit before we change the cursor position
mEditor->ForceCompositionEnd();
PRUint16 button = (PRUint16)-1;
mouseEvent->GetButton(&button);
// middle-mouse click (paste);
if (button == 1)
{
if (Preferences::GetBool("middlemouse.paste", PR_FALSE))
{
// Set the selection to the point under the mouse cursor:
nsCOMPtr<nsIDOMNode> parent;
if (NS_FAILED(nsuiEvent->GetRangeParent(getter_AddRefs(parent))))
return NS_ERROR_NULL_POINTER;
PRInt32 offset = 0;
if (NS_FAILED(nsuiEvent->GetRangeOffset(&offset)))
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsISelection> selection;
if (NS_SUCCEEDED(mEditor->GetSelection(getter_AddRefs(selection))))
(void)selection->Collapse(parent, offset);
// If the ctrl key is pressed, we'll do paste as quotation.
// Would've used the alt key, but the kde wmgr treats alt-middle specially.
PRBool ctrlKey = PR_FALSE;
mouseEvent->GetCtrlKey(&ctrlKey);
nsCOMPtr<nsIEditorMailSupport> mailEditor;
if (ctrlKey)
mailEditor = do_QueryInterface(static_cast<nsIEditor*>(mEditor));
PRInt32 clipboard;
#if defined(XP_OS2) || defined(XP_WIN32)
clipboard = nsIClipboard::kGlobalClipboard;
#else
clipboard = nsIClipboard::kSelectionClipboard;
#endif
if (mailEditor)
mailEditor->PasteAsQuotation(clipboard);
else
mEditor->Paste(clipboard);
// Prevent the event from propagating up to be possibly handled
// again by the containing window:
mouseEvent->StopPropagation();
mouseEvent->PreventDefault();
// We processed the event, whether drop/paste succeeded or not
return NS_OK;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsEditorEventListener::MouseDown(nsIDOMEvent* aMouseEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
mEditor->ForceCompositionEnd();
return NS_OK;
}
NS_IMETHODIMP
nsEditorEventListener::HandleText(nsIDOMEvent* aTextEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
if (!mEditor->IsAcceptableInputEvent(aTextEvent)) {
return NS_OK;
}
nsCOMPtr<nsIPrivateTextEvent> textEvent = do_QueryInterface(aTextEvent);
if (!textEvent) {
//non-ui event passed in. bad things.
return NS_OK;
}
nsAutoString composedText;
nsCOMPtr<nsIPrivateTextRangeList> textRangeList;
textEvent->GetText(composedText);
textRangeList = textEvent->GetInputRange();
// if we are readonly or disabled, then do nothing.
if (mEditor->IsReadonly() || mEditor->IsDisabled()) {
return NS_OK;
}
return mEditor->UpdateIMEComposition(composedText, textRangeList);
}
/**
* Drag event implementation
*/
nsresult
nsEditorEventListener::DragGesture(nsIDOMDragEvent* aDragEvent)
{
// ...figure out if a drag should be started...
PRBool canDrag;
nsresult rv = mEditor->CanDrag(aDragEvent, &canDrag);
if ( NS_SUCCEEDED(rv) && canDrag )
rv = mEditor->DoDrag(aDragEvent);
return rv;
}
nsresult
nsEditorEventListener::DragEnter(nsIDOMDragEvent* aDragEvent)
{
nsCOMPtr<nsIPresShell> presShell = GetPresShell();
NS_ENSURE_TRUE(presShell, NS_OK);
if (!mCaret) {
mCaret = new nsCaret();
mCaret->Init(presShell);
mCaret->SetCaretReadOnly(PR_TRUE);
}
presShell->SetCaret(mCaret);
return DragOver(aDragEvent);
}
nsresult
nsEditorEventListener::DragOver(nsIDOMDragEvent* aDragEvent)
{
nsCOMPtr<nsIDOMNode> parent;
nsCOMPtr<nsIDOMNSUIEvent> nsuiEvent = do_QueryInterface(aDragEvent);
if (nsuiEvent) {
PRBool defaultPrevented;
nsuiEvent->GetPreventDefault(&defaultPrevented);
if (defaultPrevented)
return NS_OK;
nsuiEvent->GetRangeParent(getter_AddRefs(parent));
nsCOMPtr<nsIContent> dropParent = do_QueryInterface(parent);
NS_ENSURE_TRUE(dropParent, NS_ERROR_FAILURE);
if (!dropParent->IsEditable())
return NS_OK;
}
PRBool canDrop = CanDrop(aDragEvent);
if (canDrop)
{
aDragEvent->PreventDefault(); // consumed
if (mCaret && nsuiEvent)
{
PRInt32 offset = 0;
nsresult rv = nsuiEvent->GetRangeOffset(&offset);
NS_ENSURE_SUCCESS(rv, rv);
// to avoid flicker, we could track the node and offset to see if we moved
if (mCaret)
mCaret->EraseCaret();
//mCaret->SetCaretVisible(PR_TRUE); // make sure it's visible
mCaret->DrawAtPosition(parent, offset);
}
}
else
{
if (mCaret)
{
mCaret->EraseCaret();
}
}
return NS_OK;
}
void
nsEditorEventListener::CleanupDragDropCaret()
{
if (mCaret)
{
mCaret->EraseCaret();
mCaret->SetCaretVisible(PR_FALSE); // hide it, so that it turns off its timer
nsCOMPtr<nsIPresShell> presShell = GetPresShell();
if (presShell)
{
presShell->RestoreCaret();
}
mCaret->Terminate();
mCaret = nsnull;
}
}
nsresult
nsEditorEventListener::DragExit(nsIDOMDragEvent* aDragEvent)
{
CleanupDragDropCaret();
return NS_OK;
}
nsresult
nsEditorEventListener::Drop(nsIDOMDragEvent* aMouseEvent)
{
CleanupDragDropCaret();
nsCOMPtr<nsIDOMNSUIEvent> nsuiEvent = do_QueryInterface(aMouseEvent);
if (nsuiEvent) {
PRBool defaultPrevented;
nsuiEvent->GetPreventDefault(&defaultPrevented);
if (defaultPrevented)
return NS_OK;
nsCOMPtr<nsIDOMNode> parent;
nsuiEvent->GetRangeParent(getter_AddRefs(parent));
nsCOMPtr<nsIContent> dropParent = do_QueryInterface(parent);
NS_ENSURE_TRUE(dropParent, NS_ERROR_FAILURE);
if (!dropParent->IsEditable())
return NS_OK;
}
PRBool canDrop = CanDrop(aMouseEvent);
if (!canDrop)
{
// was it because we're read-only?
if (mEditor->IsReadonly() || mEditor->IsDisabled())
{
// it was decided to "eat" the event as this is the "least surprise"
// since someone else handling it might be unintentional and the
// user could probably re-drag to be not over the disabled/readonly
// editfields if that is what is desired.
return aMouseEvent->StopPropagation();
}
return NS_OK;
}
aMouseEvent->StopPropagation();
aMouseEvent->PreventDefault();
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
return mEditor->InsertFromDrop(aMouseEvent);
}
PRBool
nsEditorEventListener::CanDrop(nsIDOMDragEvent* aEvent)
{
// if the target doc is read-only, we can't drop
if (mEditor->IsReadonly() || mEditor->IsDisabled()) {
return PR_FALSE;
}
nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
aEvent->GetDataTransfer(getter_AddRefs(dataTransfer));
NS_ENSURE_TRUE(dataTransfer, PR_FALSE);
nsCOMPtr<nsIDOMDOMStringList> types;
dataTransfer->GetTypes(getter_AddRefs(types));
NS_ENSURE_TRUE(types, PR_FALSE);
// Plaintext editors only support dropping text. Otherwise, HTML and files
// can be dropped as well.
PRBool typeSupported;
types->Contains(NS_LITERAL_STRING(kTextMime), &typeSupported);
if (!typeSupported) {
types->Contains(NS_LITERAL_STRING(kMozTextInternal), &typeSupported);
if (!typeSupported && !mEditor->IsPlaintextEditor()) {
types->Contains(NS_LITERAL_STRING(kHTMLMime), &typeSupported);
if (!typeSupported) {
types->Contains(NS_LITERAL_STRING(kFileMime), &typeSupported);
}
}
}
NS_ENSURE_TRUE(typeSupported, PR_FALSE);
nsCOMPtr<nsIDOMNSDataTransfer> dataTransferNS(do_QueryInterface(dataTransfer));
NS_ENSURE_TRUE(dataTransferNS, PR_FALSE);
// If there is no source node, this is probably an external drag and the
// drop is allowed. The later checks rely on checking if the drag target
// is the same as the drag source.
nsCOMPtr<nsIDOMNode> sourceNode;
dataTransferNS->GetMozSourceNode(getter_AddRefs(sourceNode));
if (!sourceNode)
return PR_TRUE;
// There is a source node, so compare the source documents and this document.
// Disallow drops on the same document.
nsCOMPtr<nsIDOMDocument> domdoc;
nsresult rv = mEditor->GetDocument(getter_AddRefs(domdoc));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
nsCOMPtr<nsIDOMDocument> sourceDoc;
rv = sourceNode->GetOwnerDocument(getter_AddRefs(sourceDoc));
NS_ENSURE_SUCCESS(rv, PR_FALSE);
if (domdoc == sourceDoc) // source and dest are the same document; disallow drops within the selection
{
nsCOMPtr<nsISelection> selection;
rv = mEditor->GetSelection(getter_AddRefs(selection));
if (NS_FAILED(rv) || !selection)
return PR_FALSE;
PRBool isCollapsed;
rv = selection->GetIsCollapsed(&isCollapsed);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
// Don't bother if collapsed - can always drop
if (!isCollapsed)
{
nsCOMPtr<nsIDOMNSUIEvent> nsuiEvent (do_QueryInterface(aEvent));
NS_ENSURE_TRUE(nsuiEvent, PR_FALSE);
nsCOMPtr<nsIDOMNode> parent;
rv = nsuiEvent->GetRangeParent(getter_AddRefs(parent));
if (NS_FAILED(rv) || !parent) return PR_FALSE;
PRInt32 offset = 0;
rv = nsuiEvent->GetRangeOffset(&offset);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
PRInt32 rangeCount;
rv = selection->GetRangeCount(&rangeCount);
NS_ENSURE_SUCCESS(rv, PR_FALSE);
for (PRInt32 i = 0; i < rangeCount; i++)
{
nsCOMPtr<nsIDOMRange> range;
rv = selection->GetRangeAt(i, getter_AddRefs(range));
nsCOMPtr<nsIDOMNSRange> nsrange(do_QueryInterface(range));
if (NS_FAILED(rv) || !nsrange)
continue; //don't bail yet, iterate through them all
PRBool inRange = PR_TRUE;
(void)nsrange->IsPointInRange(parent, offset, &inRange);
if (inRange)
return PR_FALSE; //okay, now you can bail, we are over the orginal selection
}
}
}
return PR_TRUE;
}
NS_IMETHODIMP
nsEditorEventListener::HandleStartComposition(nsIDOMEvent* aCompositionEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
if (!mEditor->IsAcceptableInputEvent(aCompositionEvent)) {
return NS_OK;
}
return mEditor->BeginIMEComposition();
}
NS_IMETHODIMP
nsEditorEventListener::HandleEndComposition(nsIDOMEvent* aCompositionEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
if (!mEditor->IsAcceptableInputEvent(aCompositionEvent)) {
return NS_OK;
}
// Transfer the event's trusted-ness to our editor
nsCOMPtr<nsIDOMNSEvent> NSEvent = do_QueryInterface(aCompositionEvent);
nsAutoEditorKeypressOperation operation(mEditor, NSEvent);
return mEditor->EndIMEComposition();
}
NS_IMETHODIMP
nsEditorEventListener::Focus(nsIDOMEvent* aEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG(aEvent);
// Don't turn on selection and caret when the editor is disabled.
if (mEditor->IsDisabled()) {
return NS_OK;
}
nsCOMPtr<nsIDOMEventTarget> target;
aEvent->GetTarget(getter_AddRefs(target));
nsCOMPtr<nsINode> node = do_QueryInterface(target);
NS_ENSURE_TRUE(node, NS_ERROR_UNEXPECTED);
// If the traget is a document node but it's not editable, we should ignore
// it because actual focused element's event is going to come.
if (node->IsNodeOfType(nsINode::eDOCUMENT) &&
!node->HasFlag(NODE_IS_EDITABLE)) {
return NS_OK;
}
if (node->IsNodeOfType(nsINode::eCONTENT)) {
// XXX If the focus event target is a form control in contenteditable
// element, perhaps, the parent HTML editor should do nothing by this
// handler. However, FindSelectionRoot() returns the root element of the
// contenteditable editor. So, the editableRoot value is invalid for
// the plain text editor, and it will be set to the wrong limiter of
// the selection. However, fortunately, actual bugs are not found yet.
nsCOMPtr<nsIContent> editableRoot = mEditor->FindSelectionRoot(node);
// make sure that the element is really focused in case an earlier
// listener in the chain changed the focus.
if (editableRoot) {
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
NS_ENSURE_TRUE(fm, NS_OK);
nsCOMPtr<nsIDOMElement> element;
fm->GetFocusedElement(getter_AddRefs(element));
if (!SameCOMIdentity(element, target))
return NS_OK;
}
}
mEditor->InitializeSelection(target);
return NS_OK;
}
NS_IMETHODIMP
nsEditorEventListener::Blur(nsIDOMEvent* aEvent)
{
NS_ENSURE_TRUE(mEditor, NS_ERROR_NOT_AVAILABLE);
NS_ENSURE_ARG(aEvent);
// check if something else is focused. If another element is focused, then
// we should not change the selection.
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
NS_ENSURE_TRUE(fm, NS_OK);
nsCOMPtr<nsIDOMElement> element;
fm->GetFocusedElement(getter_AddRefs(element));
if (element)
return NS_OK;
// turn off selection and caret
nsCOMPtr<nsISelectionController>selCon;
mEditor->GetSelectionController(getter_AddRefs(selCon));
if (selCon)
{
nsCOMPtr<nsISelection> selection;
selCon->GetSelection(nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(selection));
nsCOMPtr<nsISelectionPrivate> selectionPrivate =
do_QueryInterface(selection);
if (selectionPrivate) {
selectionPrivate->SetAncestorLimiter(nsnull);
}
nsCOMPtr<nsIPresShell> presShell = GetPresShell();
if (presShell) {
nsRefPtr<nsCaret> caret = presShell->GetCaret();
if (caret) {
caret->SetIgnoreUserModify(PR_TRUE);
}
}
selCon->SetCaretEnabled(PR_FALSE);
if(mEditor->IsFormWidget() || mEditor->IsPasswordEditor() ||
mEditor->IsReadonly() || mEditor->IsDisabled() ||
mEditor->IsInputFiltered())
{
selCon->SetDisplaySelection(nsISelectionController::SELECTION_HIDDEN);//hide but do NOT turn off
}
else
{
selCon->SetDisplaySelection(nsISelectionController::SELECTION_DISABLED);
}
selCon->RepaintSelection(nsISelectionController::SELECTION_NORMAL);
}
return NS_OK;
}
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