зеркало из https://github.com/mozilla/gecko-dev.git
458 строки
12 KiB
C++
458 строки
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "TypeInState.h"
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#include "nsEditor.h"
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/********************************************************************
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* XPCOM cruft
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*******************************************************************/
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NS_IMPL_ISUPPORTS1(TypeInState, nsISelectionListener)
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/********************************************************************
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* public methods
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*******************************************************************/
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TypeInState::TypeInState() :
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mSetArray()
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,mClearedArray()
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,mRelativeFontSize(0)
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,mLastSelectionOffset(0)
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{
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Reset();
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}
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TypeInState::~TypeInState()
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{
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// Call Reset() to release any data that may be in
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// mClearedArray and mSetArray.
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Reset();
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}
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nsresult TypeInState::UpdateSelState(nsISelection *aSelection)
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{
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NS_ENSURE_TRUE(aSelection, NS_ERROR_NULL_POINTER);
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PRBool isCollapsed = PR_FALSE;
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nsresult result = aSelection->GetIsCollapsed(&isCollapsed);
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NS_ENSURE_SUCCESS(result, result);
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if (isCollapsed)
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{
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result = nsEditor::GetStartNodeAndOffset(aSelection, getter_AddRefs(mLastSelectionContainer), &mLastSelectionOffset);
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}
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return result;
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}
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NS_IMETHODIMP TypeInState::NotifySelectionChanged(nsIDOMDocument *, nsISelection *aSelection, PRInt16)
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{
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// XXX: Selection currently generates bogus selection changed notifications
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// XXX: (bug 140303). It can notify us when the selection hasn't actually
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// XXX: changed, and it notifies us more than once for the same change.
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// XXX:
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// XXX: The following code attempts to work around the bogus notifications,
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// XXX: and should probably be removed once bug 140303 is fixed.
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// XXX:
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// XXX: This code temporarily fixes the problem where clicking the mouse in
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// XXX: the same location clears the type-in-state.
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if (aSelection)
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{
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PRBool isCollapsed = PR_FALSE;
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nsresult result = aSelection->GetIsCollapsed(&isCollapsed);
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NS_ENSURE_SUCCESS(result, result);
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PRInt32 rangeCount = 0;
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result = aSelection->GetRangeCount(&rangeCount);
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NS_ENSURE_SUCCESS(result, result);
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if (isCollapsed && rangeCount)
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{
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nsCOMPtr<nsIDOMNode> selNode;
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PRInt32 selOffset = 0;
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result = nsEditor::GetStartNodeAndOffset(aSelection, getter_AddRefs(selNode), &selOffset);
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NS_ENSURE_SUCCESS(result, result);
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if (selNode && selNode == mLastSelectionContainer && selOffset == mLastSelectionOffset)
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{
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// We got a bogus selection changed notification!
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return NS_OK;
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}
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mLastSelectionContainer = selNode;
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mLastSelectionOffset = selOffset;
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}
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else
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{
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mLastSelectionContainer = nsnull;
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mLastSelectionOffset = 0;
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}
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}
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Reset();
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return NS_OK;
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}
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void TypeInState::Reset()
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{
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for(PRUint32 i = 0, n = mClearedArray.Length(); i < n; i++) {
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delete mClearedArray[i];
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}
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mClearedArray.Clear();
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for(PRUint32 i = 0, n = mSetArray.Length(); i < n; i++) {
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delete mSetArray[i];
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}
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mSetArray.Clear();
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}
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nsresult TypeInState::SetProp(nsIAtom *aProp)
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{
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return SetProp(aProp,EmptyString(),EmptyString());
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}
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nsresult TypeInState::SetProp(nsIAtom *aProp, const nsString &aAttr)
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{
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return SetProp(aProp,aAttr,EmptyString());
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}
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nsresult TypeInState::SetProp(nsIAtom *aProp, const nsString &aAttr, const nsString &aValue)
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{
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// special case for big/small, these nest
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if (nsEditProperty::big == aProp)
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{
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mRelativeFontSize++;
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return NS_OK;
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}
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if (nsEditProperty::small == aProp)
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{
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mRelativeFontSize--;
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return NS_OK;
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}
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PRInt32 index;
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PropItem *item;
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if (IsPropSet(aProp,aAttr,nsnull,index))
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{
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// if it's already set, update the value
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item = mSetArray[index];
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item->value = aValue;
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}
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else
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{
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// make a new propitem
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item = new PropItem(aProp,aAttr,aValue);
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NS_ENSURE_TRUE(item, NS_ERROR_OUT_OF_MEMORY);
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// add it to the list of set properties
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mSetArray.AppendElement(item);
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// remove it from the list of cleared properties, if we have a match
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RemovePropFromClearedList(aProp,aAttr);
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}
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return NS_OK;
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}
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nsresult TypeInState::ClearAllProps()
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{
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// null prop means "all" props
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return ClearProp(nsnull,EmptyString());
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}
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nsresult TypeInState::ClearProp(nsIAtom *aProp)
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{
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return ClearProp(aProp,EmptyString());
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}
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nsresult TypeInState::ClearProp(nsIAtom *aProp, const nsString &aAttr)
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{
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// if it's already cleared we are done
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if (IsPropCleared(aProp,aAttr)) return NS_OK;
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// make a new propitem
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PropItem *item = new PropItem(aProp,aAttr,EmptyString());
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NS_ENSURE_TRUE(item, NS_ERROR_OUT_OF_MEMORY);
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// remove it from the list of set properties, if we have a match
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RemovePropFromSetList(aProp,aAttr);
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// add it to the list of cleared properties
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mClearedArray.AppendElement(item);
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return NS_OK;
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}
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/***************************************************************************
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* TakeClearProperty: hands back next property item on the clear list.
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* caller assumes ownership of PropItem and must delete it.
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*/
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nsresult TypeInState::TakeClearProperty(PropItem **outPropItem)
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{
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NS_ENSURE_TRUE(outPropItem, NS_ERROR_NULL_POINTER);
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*outPropItem = nsnull;
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PRUint32 count = mClearedArray.Length();
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if (count)
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{
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count--; // indizes are zero based
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*outPropItem = mClearedArray[count];
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mClearedArray.RemoveElementAt(count);
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}
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return NS_OK;
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}
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/***************************************************************************
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* TakeSetProperty: hands back next poroperty item on the set list.
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* caller assumes ownership of PropItem and must delete it.
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*/
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nsresult TypeInState::TakeSetProperty(PropItem **outPropItem)
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{
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NS_ENSURE_TRUE(outPropItem, NS_ERROR_NULL_POINTER);
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*outPropItem = nsnull;
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PRUint32 count = mSetArray.Length();
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if (count)
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{
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count--; // indizes are zero based
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*outPropItem = mSetArray[count];
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mSetArray.RemoveElementAt(count);
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}
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return NS_OK;
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}
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//**************************************************************************
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// TakeRelativeFontSize: hands back relative font value, which is then
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// cleared out.
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nsresult TypeInState::TakeRelativeFontSize(PRInt32 *outRelSize)
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{
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NS_ENSURE_TRUE(outRelSize, NS_ERROR_NULL_POINTER);
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*outRelSize = mRelativeFontSize;
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mRelativeFontSize = 0;
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return NS_OK;
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}
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nsresult TypeInState::GetTypingState(PRBool &isSet, PRBool &theSetting, nsIAtom *aProp)
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{
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return GetTypingState(isSet, theSetting, aProp, EmptyString(), nsnull);
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}
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nsresult TypeInState::GetTypingState(PRBool &isSet,
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PRBool &theSetting,
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nsIAtom *aProp,
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const nsString &aAttr)
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{
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return GetTypingState(isSet, theSetting, aProp, aAttr, nsnull);
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}
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nsresult TypeInState::GetTypingState(PRBool &isSet,
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PRBool &theSetting,
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nsIAtom *aProp,
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const nsString &aAttr,
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nsString *aValue)
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{
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if (IsPropSet(aProp, aAttr, aValue))
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{
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isSet = PR_TRUE;
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theSetting = PR_TRUE;
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}
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else if (IsPropCleared(aProp, aAttr))
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{
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isSet = PR_TRUE;
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theSetting = PR_FALSE;
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}
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else
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{
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isSet = PR_FALSE;
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}
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return NS_OK;
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}
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/********************************************************************
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* protected methods
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*******************************************************************/
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nsresult TypeInState::RemovePropFromSetList(nsIAtom *aProp,
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const nsString &aAttr)
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{
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PRInt32 index;
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if (!aProp)
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{
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// clear _all_ props
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for(PRUint32 i = 0, n = mSetArray.Length(); i < n; i++) {
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delete mSetArray[i];
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}
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mSetArray.Clear();
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mRelativeFontSize=0;
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}
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else if (FindPropInList(aProp, aAttr, nsnull, mSetArray, index))
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{
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delete mSetArray[index];
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mSetArray.RemoveElementAt(index);
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}
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return NS_OK;
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}
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nsresult TypeInState::RemovePropFromClearedList(nsIAtom *aProp,
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const nsString &aAttr)
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{
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PRInt32 index;
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if (FindPropInList(aProp, aAttr, nsnull, mClearedArray, index))
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{
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delete mClearedArray[index];
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mClearedArray.RemoveElementAt(index);
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}
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return NS_OK;
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}
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PRBool TypeInState::IsPropSet(nsIAtom *aProp,
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const nsString &aAttr,
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nsString* outValue)
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{
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PRInt32 i;
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return IsPropSet(aProp, aAttr, outValue, i);
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}
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PRBool TypeInState::IsPropSet(nsIAtom *aProp,
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const nsString &aAttr,
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nsString *outValue,
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PRInt32 &outIndex)
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{
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// linear search. list should be short.
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PRUint32 i, count = mSetArray.Length();
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for (i=0; i<count; i++)
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{
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PropItem *item = mSetArray[i];
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if ( (item->tag == aProp) &&
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(item->attr == aAttr) )
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{
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if (outValue) *outValue = item->value;
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outIndex = i;
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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PRBool TypeInState::IsPropCleared(nsIAtom *aProp,
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const nsString &aAttr)
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{
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PRInt32 i;
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return IsPropCleared(aProp, aAttr, i);
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}
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PRBool TypeInState::IsPropCleared(nsIAtom *aProp,
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const nsString &aAttr,
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PRInt32 &outIndex)
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{
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if (FindPropInList(aProp, aAttr, nsnull, mClearedArray, outIndex))
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return PR_TRUE;
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if (FindPropInList(0, EmptyString(), nsnull, mClearedArray, outIndex))
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{
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// special case for all props cleared
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outIndex = -1;
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool TypeInState::FindPropInList(nsIAtom *aProp,
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const nsAString &aAttr,
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nsAString *outValue,
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nsTArray<PropItem*> &aList,
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PRInt32 &outIndex)
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{
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// linear search. list should be short.
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PRUint32 i, count = aList.Length();
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for (i=0; i<count; i++)
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{
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PropItem *item = aList[i];
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if ( (item->tag == aProp) &&
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(item->attr == aAttr) )
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{
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if (outValue) *outValue = item->value;
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outIndex = i;
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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/********************************************************************
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* PropItem: helper struct for TypeInState
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*******************************************************************/
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PropItem::PropItem() :
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tag(nsnull)
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,attr()
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,value()
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{
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MOZ_COUNT_CTOR(PropItem);
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}
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PropItem::PropItem(nsIAtom *aTag, const nsAString &aAttr, const nsAString &aValue) :
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tag(aTag)
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,attr(aAttr)
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,value(aValue)
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{
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MOZ_COUNT_CTOR(PropItem);
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}
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PropItem::~PropItem()
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{
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MOZ_COUNT_DTOR(PropItem);
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}
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