Support for Absolute Positioning, Snap to Grid, and Inline Table Editing in Composer
r=brade, sr=jst
This commit is contained in:
glazman@netscape.com
395
editor/libeditor/html/nsHTMLAnonymousUtils.cpp
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395
editor/libeditor/html/nsHTMLAnonymousUtils.cpp
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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.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corp.
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* Portions created by the Initial Developer are Copyright (C) 2003
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Daniel Glazman (glazman@netscape.com) (Original author)
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 "nsHTMLEditor.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsIEditor.h"
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#include "nsIPresShell.h"
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#include "nsISelection.h"
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#include "nsTextEditUtils.h"
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#include "nsEditorUtils.h"
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#include "nsHTMLEditUtils.h"
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#include "nsTextEditRules.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsIDOMNSHTMLElement.h"
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#include "nsIDOMCSSValue.h"
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#include "nsIDOMCSSPrimitiveValue.h"
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#include "nsIDOMCSSStyleDeclaration.h"
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// retrieve an integer stored into a CSS computed float value
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static PRInt32 GetCSSFloatValue(nsIDOMCSSStyleDeclaration * aDecl,
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const nsAString & aProperty)
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{
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NS_ENSURE_ARG_POINTER(aDecl);
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nsCOMPtr<nsIDOMCSSValue> value;
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// get the computed CSSValue of the property
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nsresult res = aDecl->GetPropertyCSSValue(aProperty, getter_AddRefs(value));
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if (NS_FAILED(res) || !value) return 0;
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// check the type of the returned CSSValue; we handle here only
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// pixel and enum types
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nsCOMPtr<nsIDOMCSSPrimitiveValue> val = do_QueryInterface(value);
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PRUint16 type;
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val->GetPrimitiveType(&type);
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float f;
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switch (type) {
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case nsIDOMCSSPrimitiveValue::CSS_PX:
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// the value is in pixels, just get it
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res = val->GetFloatValue(nsIDOMCSSPrimitiveValue::CSS_PX, &f);
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if (NS_FAILED(res)) return 0;
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break;
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case nsIDOMCSSPrimitiveValue::CSS_IDENT: {
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// the value is keyword, we have to map these keywords into
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// numeric values
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nsAutoString str;
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res = val->GetStringValue(str);
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if (str.Equals(NS_LITERAL_STRING("thin")))
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f = 1;
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if (str.Equals(NS_LITERAL_STRING("medium")))
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f = 3;
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if (str.Equals(NS_LITERAL_STRING("thick")))
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f = 5;
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break;
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}
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default:
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f = 0;
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}
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return (PRInt32) f;
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}
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// Returns in *aReturn an anonymous nsDOMElement of type aTag,
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// child of aParentNode. If aIsCreatedHidden is true, the class
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// "hidden" is added to the created element. If aAnonClass is not
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// the empty string, it becomes the value of the attribute "_moz_anonclass"
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nsresult
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nsHTMLEditor::CreateAnonymousElement(const nsAString & aTag, nsIDOMNode * aParentNode,
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const nsAString & aAnonClass, PRBool aIsCreatedHidden,
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nsIDOMElement ** aReturn)
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{
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NS_ENSURE_ARG_POINTER(aParentNode);
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NS_ENSURE_ARG_POINTER(aReturn);
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nsCOMPtr<nsIContent> parentContent( do_QueryInterface(aParentNode) );
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if (!parentContent)
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return NS_OK;
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// Get the document
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nsCOMPtr<nsIDOMDocument> domDoc;
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GetDocument(getter_AddRefs(domDoc));
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
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if (!doc) return NS_ERROR_NULL_POINTER;
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// Get the pres shell
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if (!mPresShellWeak) return NS_ERROR_NOT_INITIALIZED;
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nsCOMPtr<nsIPresShell> ps = do_QueryReferent(mPresShellWeak);
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if (!ps) return NS_ERROR_NOT_INITIALIZED;
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// Create a new node through the element factory
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nsCOMPtr<nsIContent> newContent;
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nsresult res = CreateHTMLContent(aTag, getter_AddRefs(newContent));
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if (NS_FAILED(res)) return res;
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nsCOMPtr<nsIDOMElement> newElement = do_QueryInterface(newContent);
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if (!newElement)
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return NS_ERROR_FAILURE;
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// add the "hidden" class if needed
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if (aIsCreatedHidden) {
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res = newElement->SetAttribute(NS_LITERAL_STRING("class"),
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NS_LITERAL_STRING("hidden"));
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if (NS_FAILED(res)) return res;
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}
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// add an _moz_anonclass attribute if needed
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if (!aAnonClass.IsEmpty()) {
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res = newElement->SetAttribute(NS_LITERAL_STRING("_moz_anonclass"),
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aAnonClass);
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if (NS_FAILED(res)) return res;
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}
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// establish parenthood of the element
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newContent->SetNativeAnonymous(PR_TRUE);
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newContent->SetParent(parentContent);
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newContent->SetDocument(doc, PR_TRUE, PR_TRUE);
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newContent->SetBindingParent(newContent);
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// display the element
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ps->RecreateFramesFor(newContent);
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*aReturn = newElement;
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NS_IF_ADDREF(*aReturn);
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return NS_OK;
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}
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// Deletes all references to an anonymous element
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void
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nsHTMLEditor::DeleteRefToAnonymousNode(nsIDOMElement* aElement,
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nsIContent * aParentContent,
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nsIDocumentObserver * aDocObserver)
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{
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// call ContentRemoved() for the anonymous content
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// node so its references get removed from the frame manager's
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// undisplay map, and its layout frames get destroyed!
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if (aElement) {
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nsCOMPtr<nsIContent> content = do_QueryInterface(aElement);
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if (content) {
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aDocObserver->ContentRemoved(nsnull, aParentContent, content, -1);
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content->SetParent(nsnull);
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content->SetBindingParent(nsnull);
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content->SetDocument(nsnull, PR_TRUE, PR_TRUE);
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}
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}
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}
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// The following method is mostly called by a selection listener. When a
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// selection change is notified, the method is called to check if resizing
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// handles, a grabber and/or inline table editing UI need to be displayed
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// or refreshed
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NS_IMETHODIMP
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nsHTMLEditor::CheckSelectionStateForAnonymousButtons(nsISelection * aSelection)
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{
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NS_ENSURE_ARG_POINTER(aSelection);
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// early way out if all contextual UI extensions are disabled
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if (!mIsObjectResizingEnabled &&
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!mIsAbsolutelyPositioningEnabled &&
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!mIsInlineTableEditingEnabled)
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return NS_OK;
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nsCOMPtr<nsIDOMElement> focusElement;
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// let's get the containing element of the selection
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nsresult res = GetSelectionContainer(getter_AddRefs(focusElement));
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if (NS_FAILED(res)) return res;
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// what's its tag?
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nsAutoString focusTagName;
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res = focusElement->GetTagName(focusTagName);
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if (NS_FAILED(res)) return res;
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ToLowerCase(focusTagName);
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nsCOMPtr<nsIAtom> focusTagAtom = getter_AddRefs(NS_NewAtom(focusTagName));
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nsCOMPtr<nsIDOMElement> absPosElement;
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if (mIsAbsolutelyPositioningEnabled) {
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// Absolute Positioning support is enabled, is the selection contained
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// in an absolutely positioned element ?
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res = GetAbsolutelyPositionedSelectionContainer(getter_AddRefs(absPosElement));
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if (NS_FAILED(res)) return res;
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}
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nsCOMPtr<nsIDOMElement> cellElement;
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if (mIsObjectResizingEnabled || mIsInlineTableEditingEnabled) {
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// Resizing or Inline Table Editing is enabled, we need to check if the
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// selection is contained in a table cell
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res = GetElementOrParentByTagName(NS_LITERAL_STRING("td"),
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nsnull,
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getter_AddRefs(cellElement));
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if (NS_FAILED(res)) return res;
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}
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if (mIsObjectResizingEnabled && cellElement) {
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// we are here because Resizing is enabled AND selection is contained in
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// a cell
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nsCOMPtr<nsIDOMNode> tableNode, cellNode = do_QueryInterface(cellElement);
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// get the enclosing table
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tableNode = GetEnclosingTable(cellNode);
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if (nsEditProperty::img != focusTagAtom) {
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// the element container of the selection is not an image, so we'll show
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// the resizers around the table
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focusElement = do_QueryInterface(tableNode);
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focusTagAtom = nsEditProperty::table;
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}
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}
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// we allow resizers only around images, tables, and absolutely positioned
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// elements. If we don't have image/table, let's look at the latter case.
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if (nsEditProperty::img != focusTagAtom &&
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nsEditProperty::table != focusTagAtom)
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focusElement = absPosElement;
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// at this point, focusElement contains the element for Resizing,
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// cellElement contains the element for InlineTableEditing
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// absPosElement contains the element for Positioning
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// first let's cancel old settings if needed
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PRBool refreshResizing = (mResizedObject != nsnull);
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PRBool refreshPositioning = (mAbsolutelyPositionedObject != nsnull);
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PRBool refreshTableEditing = (mInlineEditedCell != nsnull);
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if (mIsAbsolutelyPositioningEnabled && mAbsolutelyPositionedObject &&
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absPosElement != mAbsolutelyPositionedObject) {
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res = HideGrabber();
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if (NS_FAILED(res)) return res;
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refreshPositioning = PR_FALSE;
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}
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if (mIsObjectResizingEnabled && mResizedObject &&
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mResizedObject != focusElement) {
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res = HideResizers();
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if (NS_FAILED(res)) return res;
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refreshResizing = PR_FALSE;
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}
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if (mIsInlineTableEditingEnabled && mInlineEditedCell &&
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mInlineEditedCell != cellElement) {
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res = HideInlineTableEditingUI();
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if (NS_FAILED(res)) return res;
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refreshTableEditing = PR_FALSE;
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}
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// now, let's display all contextual UI for good
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if (mIsObjectResizingEnabled && focusElement) {
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if (nsEditProperty::img == focusTagAtom)
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mResizedObjectIsAnImage = PR_TRUE;
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if (refreshResizing)
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res = RefreshResizers();
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else
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res = ShowResizers(focusElement);
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if (NS_FAILED(res)) return res;
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}
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if (mIsAbsolutelyPositioningEnabled && absPosElement) {
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if (refreshPositioning)
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res = RefreshGrabber();
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else
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res = ShowGrabberOnElement(absPosElement);
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if (NS_FAILED(res)) return res;
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}
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if (mIsInlineTableEditingEnabled && cellElement) {
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if (refreshTableEditing)
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res = RefreshInlineTableEditingUI();
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else
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res = ShowInlineTableEditingUI(cellElement);
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}
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return res;
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}
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// Resizing and Absolute Positioning need to know everything about the
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// containing box of the element: position, size, margins, borders
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nsresult
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nsHTMLEditor::GetPositionAndDimensions(nsIDOMElement * aElement,
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PRInt32 & aX, PRInt32 & aY,
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PRInt32 & aW, PRInt32 & aH,
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PRInt32 & aBorderLeft,
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PRInt32 & aBorderTop,
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PRInt32 & aMarginLeft,
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PRInt32 & aMarginTop)
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{
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NS_ENSURE_ARG_POINTER(aElement);
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// Is the element positioned ? let's check the cheap way first...
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PRBool isPositioned = PR_FALSE;
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nsresult res = aElement->HasAttribute(NS_LITERAL_STRING("_moz_abspos"), &isPositioned);
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if (NS_FAILED(res)) return res;
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if (!isPositioned) {
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// hmmm... the expensive way now...
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nsAutoString positionStr;
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mHTMLCSSUtils->GetComputedProperty(aElement, nsEditProperty::cssPosition,
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positionStr);
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isPositioned = positionStr.Equals(NS_LITERAL_STRING("absolute"));
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}
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if (isPositioned) {
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// Yes, it is absolutely positioned
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mResizedObjectIsAbsolutelyPositioned = PR_TRUE;
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nsCOMPtr<nsIDOMViewCSS> viewCSS;
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res = mHTMLCSSUtils->GetDefaultViewCSS(aElement, getter_AddRefs(viewCSS));
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if (NS_FAILED(res)) return res;
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nsAutoString empty;
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nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
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// Get the all the computed css styles attached to the element node
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res = viewCSS->GetComputedStyle(aElement, empty, getter_AddRefs(cssDecl));
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if (NS_FAILED(res)) return res;
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aBorderLeft = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("border-left-width"));
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aBorderTop = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("border-top-width"));
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aMarginLeft = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("margin-left"));
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aMarginTop = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("margin-top"));
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aX = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("left")) +
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aMarginLeft + aBorderLeft;
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aY = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("top")) +
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aMarginTop + aBorderTop;
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aW = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("width"));
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aH = GetCSSFloatValue(cssDecl, NS_LITERAL_STRING("height"));
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}
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else {
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mResizedObjectIsAbsolutelyPositioned = PR_FALSE;
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nsCOMPtr<nsIDOMNSHTMLElement> nsElement = do_QueryInterface(aElement);
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if (!nsElement) {return NS_ERROR_NULL_POINTER; }
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GetElementOrigin(aElement, aX, aY);
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res = nsElement->GetOffsetWidth(&aW);
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if (NS_FAILED(res)) return res;
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res = nsElement->GetOffsetHeight(&aH);
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aBorderLeft = 0;
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aBorderTop = 0;
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aMarginLeft = 0;
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aMarginTop = 0;
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}
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return res;
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}
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// self-explanatory
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void
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nsHTMLEditor::SetAnonymousElementPosition(PRInt32 aX, PRInt32 aY, nsIDOMElement *aElement)
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{
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nsAutoString x, y;
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x.AppendInt(aX);
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y.AppendInt(aY);
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mHTMLCSSUtils->SetCSSProperty(aElement,
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NS_LITERAL_STRING("left"),
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x + NS_LITERAL_STRING("px"));
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mHTMLCSSUtils->SetCSSProperty(aElement,
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NS_LITERAL_STRING("top"),
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y + NS_LITERAL_STRING("px"));
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}
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Block a user