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RetroZilla/editor/libeditor/html/nsHTMLEditUtils.cpp
Ryan Nematz 2f2ae146c0 first commit
2015-10-20 23:03:22 -04:00

458 lines
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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):
*
* 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 "nsHTMLEditUtils.h"
#include "nsTextEditUtils.h"
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsEditor.h"
#include "nsEditProperty.h"
#include "nsIAtom.h"
#include "nsIDOMNode.h"
#include "nsIContent.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMHTMLAnchorElement.h"
///////////////////////////////////////////////////////////////////////////
//
PRBool
nsHTMLEditUtils::IsBig(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::big);
}
///////////////////////////////////////////////////////////////////////////
// IsInlineStyle true if node is an inline style
//
PRBool
nsHTMLEditUtils::IsInlineStyle(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsInlineStyle");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::b)
|| (nodeAtom == nsEditProperty::i)
|| (nodeAtom == nsEditProperty::u)
|| (nodeAtom == nsEditProperty::tt)
|| (nodeAtom == nsEditProperty::s)
|| (nodeAtom == nsEditProperty::strike)
|| (nodeAtom == nsEditProperty::big)
|| (nodeAtom == nsEditProperty::small)
|| (nodeAtom == nsEditProperty::blink)
|| (nodeAtom == nsEditProperty::sub)
|| (nodeAtom == nsEditProperty::sup)
|| (nodeAtom == nsEditProperty::font);
}
///////////////////////////////////////////////////////////////////////////
// IsFormatNode true if node is a format node
//
PRBool
nsHTMLEditUtils::IsFormatNode(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsFormatNode");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::p)
|| (nodeAtom == nsEditProperty::pre)
|| (nodeAtom == nsEditProperty::h1)
|| (nodeAtom == nsEditProperty::h2)
|| (nodeAtom == nsEditProperty::h3)
|| (nodeAtom == nsEditProperty::h4)
|| (nodeAtom == nsEditProperty::h5)
|| (nodeAtom == nsEditProperty::h6)
|| (nodeAtom == nsEditProperty::address);
}
///////////////////////////////////////////////////////////////////////////
// IsNodeThatCanOutdent true if node is a list, list item, or blockquote
//
PRBool
nsHTMLEditUtils::IsNodeThatCanOutdent(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsNodeThatCanOutdent");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::ul)
|| (nodeAtom == nsEditProperty::ol)
|| (nodeAtom == nsEditProperty::dl)
|| (nodeAtom == nsEditProperty::li)
|| (nodeAtom == nsEditProperty::dd)
|| (nodeAtom == nsEditProperty::dt)
|| (nodeAtom == nsEditProperty::blockquote);
}
///////////////////////////////////////////////////////////////////////////
//
PRBool
nsHTMLEditUtils::IsSmall(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::small);
}
/********************************************************
* helper methods from nsHTMLEditRules
********************************************************/
///////////////////////////////////////////////////////////////////////////
// IsHeader: true if node an html header
//
PRBool
nsHTMLEditUtils::IsHeader(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsHeader");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::h1)
|| (nodeAtom == nsEditProperty::h2)
|| (nodeAtom == nsEditProperty::h3)
|| (nodeAtom == nsEditProperty::h4)
|| (nodeAtom == nsEditProperty::h5)
|| (nodeAtom == nsEditProperty::h6);
}
///////////////////////////////////////////////////////////////////////////
// IsParagraph: true if node an html paragraph
//
PRBool
nsHTMLEditUtils::IsParagraph(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::p);
}
///////////////////////////////////////////////////////////////////////////
// IsHR: true if node an horizontal rule
//
PRBool
nsHTMLEditUtils::IsHR(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::hr);
}
///////////////////////////////////////////////////////////////////////////
// IsListItem: true if node an html list item
//
PRBool
nsHTMLEditUtils::IsListItem(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsListItem");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::li)
|| (nodeAtom == nsEditProperty::dd)
|| (nodeAtom == nsEditProperty::dt);
}
///////////////////////////////////////////////////////////////////////////
// IsTableElement: true if node an html table, td, tr, ...
//
PRBool
nsHTMLEditUtils::IsTableElement(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditor::IsTableElement");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::table)
|| (nodeAtom == nsEditProperty::tr)
|| (nodeAtom == nsEditProperty::td)
|| (nodeAtom == nsEditProperty::th)
|| (nodeAtom == nsEditProperty::thead)
|| (nodeAtom == nsEditProperty::tfoot)
|| (nodeAtom == nsEditProperty::tbody)
|| (nodeAtom == nsEditProperty::caption);
}
///////////////////////////////////////////////////////////////////////////
// IsTableElementButNotTable: true if node an html td, tr, ... (doesn't include table)
//
PRBool
nsHTMLEditUtils::IsTableElementButNotTable(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditor::IsTableElementButNotTable");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::tr)
|| (nodeAtom == nsEditProperty::td)
|| (nodeAtom == nsEditProperty::th)
|| (nodeAtom == nsEditProperty::thead)
|| (nodeAtom == nsEditProperty::tfoot)
|| (nodeAtom == nsEditProperty::tbody)
|| (nodeAtom == nsEditProperty::caption);
}
///////////////////////////////////////////////////////////////////////////
// IsTable: true if node an html table
//
PRBool
nsHTMLEditUtils::IsTable(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::table);
}
///////////////////////////////////////////////////////////////////////////
// IsTableRow: true if node an html tr
//
PRBool
nsHTMLEditUtils::IsTableRow(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::tr);
}
///////////////////////////////////////////////////////////////////////////
// IsTableCell: true if node an html td or th
//
PRBool
nsHTMLEditUtils::IsTableCell(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsTableCell");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::td)
|| (nodeAtom == nsEditProperty::th);
}
///////////////////////////////////////////////////////////////////////////
// IsTableCell: true if node an html td or th
//
PRBool
nsHTMLEditUtils::IsTableCellOrCaption(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsTableCell");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::td)
|| (nodeAtom == nsEditProperty::th)
|| (nodeAtom == nsEditProperty::caption);
}
///////////////////////////////////////////////////////////////////////////
// IsList: true if node an html list
//
PRBool
nsHTMLEditUtils::IsList(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsList");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::ul)
|| (nodeAtom == nsEditProperty::ol)
|| (nodeAtom == nsEditProperty::dl);
}
///////////////////////////////////////////////////////////////////////////
// IsOrderedList: true if node an html ordered list
//
PRBool
nsHTMLEditUtils::IsOrderedList(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::ol);
}
///////////////////////////////////////////////////////////////////////////
// IsUnorderedList: true if node an html unordered list
//
PRBool
nsHTMLEditUtils::IsUnorderedList(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::ul);
}
///////////////////////////////////////////////////////////////////////////
// IsBlockquote: true if node an html blockquote node
//
PRBool
nsHTMLEditUtils::IsBlockquote(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::blockquote);
}
///////////////////////////////////////////////////////////////////////////
// IsPre: true if node an html pre node
//
PRBool
nsHTMLEditUtils::IsPre(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::pre);
}
///////////////////////////////////////////////////////////////////////////
// IsAddress: true if node an html address node
//
PRBool
nsHTMLEditUtils::IsAddress(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::address);
}
///////////////////////////////////////////////////////////////////////////
// IsImage: true if node an html image node
//
PRBool
nsHTMLEditUtils::IsImage(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::img);
}
PRBool
nsHTMLEditUtils::IsLink(nsIDOMNode *aNode)
{
if (!aNode) return PR_FALSE;
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor = do_QueryInterface(aNode);
if (anchor)
{
nsAutoString tmpText;
if (NS_SUCCEEDED(anchor->GetHref(tmpText)) && !tmpText.IsEmpty())
return PR_TRUE;
}
return PR_FALSE;
}
PRBool
nsHTMLEditUtils::IsNamedAnchor(nsIDOMNode *aNode)
{
if (!aNode) return PR_FALSE;
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor = do_QueryInterface(aNode);
if (anchor)
{
nsAutoString tmpText;
if (NS_SUCCEEDED(anchor->GetName(tmpText)) && !tmpText.IsEmpty())
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsDiv: true if node an html div node
//
PRBool
nsHTMLEditUtils::IsDiv(nsIDOMNode *node)
{
return nsEditor::NodeIsType(node, nsEditProperty::div);
}
///////////////////////////////////////////////////////////////////////////
// IsMozDiv: true if node an html div node with type = _moz
//
PRBool
nsHTMLEditUtils::IsMozDiv(nsIDOMNode *node)
{
if (IsDiv(node) && nsTextEditUtils::HasMozAttr(node)) return PR_TRUE;
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsMailCite: true if node an html blockquote with type=cite
//
PRBool
nsHTMLEditUtils::IsMailCite(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsMailCite");
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(node);
if (!elem) return PR_FALSE;
nsAutoString attrName (NS_LITERAL_STRING("type"));
// don't ask me why, but our html mailcites are id'd by "type=cite"...
nsAutoString attrVal;
nsresult res = elem->GetAttribute(attrName, attrVal);
ToLowerCase(attrVal);
if (NS_SUCCEEDED(res))
{
if (attrVal.EqualsLiteral("cite"))
return PR_TRUE;
}
// ... but our plaintext mailcites by "_moz_quote=true". go figure.
attrName.AssignLiteral("_moz_quote");
res = elem->GetAttribute(attrName, attrVal);
if (NS_SUCCEEDED(res))
{
ToLowerCase(attrVal);
if (attrVal.EqualsLiteral("true"))
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsFormWidget: true if node is a form widget of some kind
//
PRBool
nsHTMLEditUtils::IsFormWidget(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditUtils::IsFormWidget");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(node);
return (nodeAtom == nsEditProperty::textarea)
|| (nodeAtom == nsEditProperty::select)
|| (nodeAtom == nsEditProperty::button)
|| (nodeAtom == nsEditProperty::input);
}
PRBool
nsHTMLEditUtils::SupportsAlignAttr(nsIDOMNode * aNode)
{
NS_PRECONDITION(aNode, "null node passed to nsHTMLEditUtils::SupportsAlignAttr");
nsCOMPtr<nsIAtom> nodeAtom = nsEditor::GetTag(aNode);
return (nodeAtom == nsEditProperty::hr)
|| (nodeAtom == nsEditProperty::table)
|| (nodeAtom == nsEditProperty::tbody)
|| (nodeAtom == nsEditProperty::tfoot)
|| (nodeAtom == nsEditProperty::thead)
|| (nodeAtom == nsEditProperty::tr)
|| (nodeAtom == nsEditProperty::td)
|| (nodeAtom == nsEditProperty::th)
|| (nodeAtom == nsEditProperty::div)
|| (nodeAtom == nsEditProperty::p)
|| (nodeAtom == nsEditProperty::h1)
|| (nodeAtom == nsEditProperty::h2)
|| (nodeAtom == nsEditProperty::h3)
|| (nodeAtom == nsEditProperty::h4)
|| (nodeAtom == nsEditProperty::h5)
|| (nodeAtom == nsEditProperty::h6);
}
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