pjs/editor/base/nsEditorController.cpp

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C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*/
#include "nsIComponentManager.h"
#include "nsEditorController.h"
#include "nsIGfxTextControlFrame.h"
#include "nsIEditor.h"
#include "nsIEditorMailSupport.h"
#include "nsIFormControlFrame.h"
#include "nsIDOMSelection.h"
#include "nsIHTMLEditor.h"
#include "nsISupportsPrimitives.h"
#include "nsXPIDLString.h"
#include "nsISelectionController.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsEditorCommands.h"
#define kMaxStackCommandNameLength 128
NS_IMPL_ADDREF(nsEditorController)
NS_IMPL_RELEASE(nsEditorController)
NS_INTERFACE_MAP_BEGIN(nsEditorController)
NS_INTERFACE_MAP_ENTRY(nsIController)
NS_INTERFACE_MAP_ENTRY(nsIEditorController)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIEditorController)
NS_INTERFACE_MAP_END
nsEditorController::nsEditorController()
: mContent(NULL)
, mEditor(NULL)
{
NS_INIT_REFCNT();
}
nsEditorController::~nsEditorController()
{
// if the singleton command manger has a refcount of 1 at this point, we need to
// set it to null
}
NS_IMETHODIMP nsEditorController::Init()
{
nsresult rv;
// get our ref to the singleton command manager
rv = GetCommandManager(getter_AddRefs(mCommandManager));
if (NS_FAILED(rv)) return rv;
return rv;
}
#define NS_REGISTER_ONE_COMMAND(_cmdClass, _cmdName) \
{ \
_cmdClass* theCmd = new _cmdClass; \
nsAutoString cmdString(_cmdName); \
rv = RegisterOneCommand(cmdString.GetUnicode(), inCommandManager, theCmd); \
}
#define NS_REGISTER_FIRST_COMMAND(_cmdClass, _cmdName) \
{ \
_cmdClass* theCmd = new _cmdClass; \
nsAutoString cmdString(_cmdName); \
rv = RegisterOneCommand(cmdString.GetUnicode(), inCommandManager, theCmd); \
#define NS_REGISTER_NEXT_COMMAND(_cmdClass, _cmdName) \
cmdString = _cmdName; \
rv = RegisterOneCommand(cmdString.GetUnicode(), inCommandManager, theCmd);
#define NS_REGISTER_LAST_COMMAND(_cmdClass, _cmdName) \
cmdString = _cmdName; \
rv = RegisterOneCommand(cmdString.GetUnicode(), inCommandManager, theCmd); \
}
// static
nsresult nsEditorController::RegisterEditorCommands(nsIControllerCommandManager *inCommandManager)
{
nsresult rv;
// now register all our commands
NS_REGISTER_ONE_COMMAND(nsUndoCommand, "cmd_undo");
NS_REGISTER_ONE_COMMAND(nsRedoCommand, "cmd_redo");
NS_REGISTER_ONE_COMMAND(nsCutCommand, "cmd_cut");
NS_REGISTER_ONE_COMMAND(nsCopyCommand, "cmd_copy");
NS_REGISTER_ONE_COMMAND(nsSelectAllCommand, "cmd_selectAll");
NS_REGISTER_FIRST_COMMAND(nsPasteCommand, "cmd_paste");
NS_REGISTER_LAST_COMMAND(nsPasteCommand, "cmd_pasteQuote");
NS_REGISTER_FIRST_COMMAND(nsDeleteCommand, "cmd_delete");
NS_REGISTER_NEXT_COMMAND(nsDeleteCommand, "cmd_deleteCharBackward");
NS_REGISTER_NEXT_COMMAND(nsDeleteCommand, "cmd_deleteCharForward");
NS_REGISTER_NEXT_COMMAND(nsDeleteCommand, "cmd_deleteWordBackward");
NS_REGISTER_NEXT_COMMAND(nsDeleteCommand, "cmd_deleteWordForward");
NS_REGISTER_NEXT_COMMAND(nsDeleteCommand, "cmd_deleteToBeginningOfLine");
NS_REGISTER_LAST_COMMAND(nsDeleteCommand, "cmd_deleteToEndOfLine");
NS_REGISTER_FIRST_COMMAND(nsSelectionMoveCommands, "cmd_scrollTop");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_scrollBottom");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_moveTop");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_moveBottom");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectTop");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_lineNext");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_linePrevious");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectLineNext");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectLinePrevious");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_charPrevious");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_charNext");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectCharPrevious");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectCharNext");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_beginLine");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_endLine");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectBeginLine");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectEndLine");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_wordPrevious");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_wordNext");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectWordPrevious");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectWordNext");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_scrollPageUp");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_scrollPageDown");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_scrollLineUp");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_scrollLineDown");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_movePageUp");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_movePageDown");
NS_REGISTER_NEXT_COMMAND(nsSelectionMoveCommands, "cmd_selectPageUp");
NS_REGISTER_LAST_COMMAND(nsSelectionMoveCommands, "cmd_selectPageDown");
return NS_OK;
}
// static
nsresult nsEditorController::RegisterOneCommand(const PRUnichar* aCommandName,
nsIControllerCommandManager *inCommandManager,
nsBaseCommand* aCommand)
{
nsCOMPtr<nsIControllerCommand> editorCommand;
NS_ADDREF(aCommand);
nsresult rv = aCommand->QueryInterface(NS_GET_IID(nsIControllerCommand), getter_AddRefs(editorCommand));
NS_RELEASE(aCommand);
if (NS_FAILED(rv)) return rv;
return inCommandManager->RegisterCommand(aCommandName, editorCommand); // this is the owning ref
}
NS_IMETHODIMP nsEditorController::SetContent(nsIHTMLContent *aContent)
{
// indiscriminately sets mContent, no ref counting here
mContent = aContent;
return NS_OK;
}
NS_IMETHODIMP nsEditorController::SetEditor(nsIEditor *aEditor)
{
// null editors are allowed
mEditor = aEditor;
return NS_OK;
}
/* =======================================================================
* nsIController
* ======================================================================= */
NS_IMETHODIMP nsEditorController::IsCommandEnabled(const PRUnichar *aCommand, PRBool *aResult)
{
NS_ENSURE_ARG_POINTER(aCommand);
NS_ENSURE_ARG_POINTER(aResult);
*aResult = PR_FALSE;
nsCOMPtr<nsIEditor> editor;
NS_ENSURE_SUCCESS(GetEditor(getter_AddRefs(editor)), NS_ERROR_FAILURE);
// a null editor is a legal state
if (!editor)
return NS_OK; // just say we don't handle the command
if (!mCommandManager)
{
NS_ASSERTION(0, "No command handler!");
return NS_ERROR_UNEXPECTED;
}
// find the command
nsCOMPtr<nsIControllerCommand> commandHandler;
mCommandManager->FindCommandHandler(aCommand, getter_AddRefs(commandHandler));
if (!commandHandler)
{
#if DEBUG
nsCAutoString msg("EditorController asked about a command that it does not handle -- ");
msg += aCommand;
NS_WARNING(msg);
#endif
return NS_OK; // we don't handle this command
}
return commandHandler->IsCommandEnabled(aCommand, editor, aResult);
}
NS_IMETHODIMP nsEditorController::SupportsCommand(const PRUnichar *aCommand, PRBool *aResult)
{
NS_ENSURE_ARG_POINTER(aCommand);
NS_ENSURE_ARG_POINTER(aResult);
// XXX: need to check the readonly and disabled states
*aResult = PR_FALSE;
// find the command
nsCOMPtr<nsIControllerCommand> commandHandler;
mCommandManager->FindCommandHandler(aCommand, getter_AddRefs(commandHandler));
*aResult = (commandHandler.get() != NULL);
return NS_OK;
}
NS_IMETHODIMP nsEditorController::DoCommand(const PRUnichar *aCommand)
{
NS_ENSURE_ARG_POINTER(aCommand);
nsCOMPtr<nsIEditor> editor;
nsCOMPtr<nsISelectionController> selCont;
NS_ENSURE_SUCCESS(GetEditor(getter_AddRefs(editor)), NS_ERROR_FAILURE);
if (!editor)
{ // Q: What does it mean if there is no editor?
// A: It means we've never had focus, so we can't do anything
return NS_OK;
}
nsresult rv = NS_ERROR_NO_INTERFACE;
// find the command
nsCOMPtr<nsIControllerCommand> commandHandler;
mCommandManager->FindCommandHandler(aCommand, getter_AddRefs(commandHandler));
if (!commandHandler)
{
#if DEBUG
nsCAutoString msg("EditorController asked to do a command that it does not handle -- ");
msg += aCommand;
NS_WARNING(msg);
#endif
return NS_OK; // we don't handle this command
}
return commandHandler->DoCommand(aCommand, editor);
}
NS_IMETHODIMP nsEditorController::OnEvent(const PRUnichar *aEventName)
{
NS_ENSURE_ARG_POINTER(aEventName);
return NS_OK;
}
NS_IMETHODIMP nsEditorController::GetEditor(nsIEditor ** aEditor)
{
NS_ENSURE_ARG_POINTER(aEditor);
if (mEditor)
{
*aEditor = mEditor;
NS_ADDREF(*aEditor);
return NS_OK;
}
return NS_OK;
}
NS_IMETHODIMP nsEditorController::GetSelectionController(nsISelectionController ** aSelCon)
{
nsCOMPtr<nsIEditor>editor;
nsresult result = GetEditor(getter_AddRefs(editor));
if (NS_FAILED(result) || !editor)
return result ? result : NS_ERROR_FAILURE;
nsCOMPtr<nsIPresShell> presShell;
result = editor->GetPresShell(getter_AddRefs(presShell));
if (NS_FAILED(result) || !presShell)
return result ? result : NS_ERROR_FAILURE;
nsCOMPtr<nsISelectionController> selController = do_QueryInterface(presShell);
if (selController)
{
*aSelCon = selController;
NS_ADDREF(*aSelCon);
return NS_OK;
}
return NS_ERROR_FAILURE;
/*
NS_ENSURE_ARG_POINTER(aSelCon);
nsCOMPtr<nsIDocument> doc;
mContent->GetDocument(*getter_AddRefs(doc));
*aSelCon = nsnull;
if (doc)
{
PRInt32 i = doc->GetNumberOfShells();
if (i == 0)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIPresShell> presShell = getter_AddRefs(doc->GetShellAt(0));
nsCOMPtr<nsISelectionController> selController = do_QueryInterface(presShell);
if (selController)
{
*aSelCon = selController;
(*aSelCon)->AddRef();
return NS_OK;
}
}
return NS_ERROR_FAILURE;
*/
}
NS_IMETHODIMP nsEditorController::GetFrame(nsIGfxTextControlFrame **aFrame)
{
NS_ENSURE_ARG_POINTER(aFrame);
//DEPRICATED. WILL REMOVE LATER
/*
*aFrame = nsnull;
NS_ENSURE_STATE(mContent);
nsIFormControlFrame *frame = nsnull;
NS_ENSURE_SUCCESS(
nsGenericHTMLElement::GetPrimaryFrame(mContent, frame),
NS_ERROR_FAILURE
);
if (!frame) { return NS_ERROR_FAILURE; }
NS_ENSURE_SUCCESS(
frame->QueryInterface(NS_GET_IID(nsIGfxTextControlFrame), (void**)aFrame),
NS_ERROR_FAILURE
);
*/
return NS_OK;
}
PRBool nsEditorController::IsEnabled()
{
return PR_TRUE; // XXX: need to implement this
/*
PRUint32 flags=0;
NS_ENSURE_SUCCESS(mEditor->GetFlags(&flags), NS_ERROR_FAILURE);
check eEditorReadonlyBit and eEditorDisabledBit
*/
}
#ifdef XP_MAC
#pragma mark -
#endif
nsWeakPtr nsEditorController::sCommandManager = NULL;
// static
nsresult nsEditorController::GetCommandManager(nsIControllerCommandManager* *outCommandManager)
{
NS_ENSURE_ARG_POINTER(outCommandManager);
nsCOMPtr<nsIControllerCommandManager> cmdManager = do_QueryReferent(sCommandManager);
if (!cmdManager)
{
nsresult rv;
cmdManager = do_CreateInstance("component://netscape/rdf/controller-command-manager", &rv);
if (NS_FAILED(rv)) return rv;
// register the commands. This just happens once per instance
rv = nsEditorController::RegisterEditorCommands(cmdManager);
if (NS_FAILED(rv)) return rv;
// save the singleton in our static weak reference
sCommandManager = getter_AddRefs(NS_GetWeakReference(cmdManager, &rv));
if (NS_FAILED(rv)) return rv;
}
NS_ADDREF(*outCommandManager = cmdManager);
return NS_OK;
}