gecko-dev/editor/base/nsHTMLEditUtils.cpp

457 lines
11 KiB
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.org 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):
*/
#include "nsHTMLEditUtils.h"
#include "nsString.h"
#include "nsEditor.h"
#include "nsIDOMNode.h"
#include "nsIDOMNodeList.h"
/********************************************************
* helper methods from nsTextEditRules
********************************************************/
///////////////////////////////////////////////////////////////////////////
// IsBody: true if node an html body node
//
PRBool
nsHTMLEditUtils::IsBody(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditUtils::IsBody");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "body")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsBreak: true if node an html break node
//
PRBool
nsHTMLEditUtils::IsBreak(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditUtils::IsBreak");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "br")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsBreak: true if node an html break node
//
PRBool
nsHTMLEditUtils::IsBig(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditUtils::IsBig");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "big")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsBreak: true if node an html break node
//
PRBool
nsHTMLEditUtils::IsSmall(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditUtils::IsSmall");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "small")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsMozBR: true if node an html br node with type = _moz
//
PRBool
nsHTMLEditUtils::IsMozBR(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditUtils::IsMozBR");
if (IsBreak(node) && HasMozAttr(node)) return PR_TRUE;
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// HasMozAttr: true if node has type attribute = _moz
// (used to indicate the div's and br's we use in
// mail compose rules)
//
PRBool
nsHTMLEditUtils::HasMozAttr(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::HasMozAttr");
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(node);
if (elem)
{
nsAutoString typeAttrName("type");
nsAutoString typeAttrVal;
nsresult res = elem->GetAttribute(typeAttrName, typeAttrVal);
typeAttrVal.ToLowerCase();
if (NS_SUCCEEDED(res) && (typeAttrVal == "_moz"))
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// InBody: true if node is a descendant of the body
//
PRBool
nsHTMLEditUtils::InBody(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::InBody");
nsCOMPtr<nsIDOMNode> tmp;
nsCOMPtr<nsIDOMNode> p = do_QueryInterface(node);
while (p && !IsBody(p))
{
if ( NS_FAILED(p->GetParentNode(getter_AddRefs(tmp))) || !tmp) // no parent, ran off top of tree
return PR_FALSE;
p = tmp;
}
if (p) return PR_TRUE;
return PR_FALSE;
}
/********************************************************
* 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");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if ( (tag == "h1") ||
(tag == "h2") ||
(tag == "h3") ||
(tag == "h4") ||
(tag == "h5") ||
(tag == "h6") )
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsParagraph: true if node an html paragraph
//
PRBool
nsHTMLEditUtils::IsParagraph(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsParagraph");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "p")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsListItem: true if node an html list item
//
PRBool
nsHTMLEditUtils::IsListItem(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsListItem");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "li")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsTableCell: true if node an html td or th
//
PRBool
nsHTMLEditUtils::IsTableRow(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsTableRow");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "tr")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsTableCell: true if node an html td or th
//
PRBool
nsHTMLEditUtils::IsTableCell(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsTableCell");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "td" || tag == "th")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsList: true if node an html list
//
PRBool
nsHTMLEditUtils::IsList(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsList");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if ( (tag == "ol") ||
(tag == "ul") )
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsOrderedList: true if node an html orderd list
//
PRBool
nsHTMLEditUtils::IsOrderedList(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsOrderedList");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "ol")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsUnorderedList: true if node an html orderd list
//
PRBool
nsHTMLEditUtils::IsUnorderedList(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsUnorderedList");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "ul")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsBlockquote: true if node an html blockquote node
//
PRBool
nsHTMLEditUtils::IsBlockquote(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsBlockquote");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "blockquote")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsAnchor: true if node an html anchor node
//
PRBool
nsHTMLEditUtils::IsAnchor(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsAnchor");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "a")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsImage: true if node an html image node
//
PRBool
nsHTMLEditUtils::IsImage(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null node passed to nsHTMLEditUtils::IsImage");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "img")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsDiv: true if node an html div node
//
PRBool
nsHTMLEditUtils::IsDiv(nsIDOMNode *node)
{
NS_PRECONDITION(node, "null parent passed to nsHTMLEditUtils::IsDiv");
nsAutoString tag;
nsEditor::GetTagString(node,tag);
tag.ToLowerCase();
if (tag == "div")
{
return PR_TRUE;
}
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsNormalDiv: true if node an html div node, without type = _moz
//
PRBool
nsHTMLEditUtils::IsNormalDiv(nsIDOMNode *node)
{
if (IsDiv(node) && !nsHTMLEditUtils::HasMozAttr(node)) return PR_TRUE;
return PR_FALSE;
}
///////////////////////////////////////////////////////////////////////////
// IsMozDiv: true if node an html div node with type = _moz
//
PRBool
nsHTMLEditUtils::IsMozDiv(nsIDOMNode *node)
{
if (IsDiv(node) && 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");
if (IsBlockquote(node))
{
nsCOMPtr<nsIDOMElement> bqElem = do_QueryInterface(node);
nsAutoString typeAttrName("type");
nsAutoString typeAttrVal;
nsresult res = bqElem->GetAttribute(typeAttrName, typeAttrVal);
typeAttrVal.ToLowerCase();
if (NS_SUCCEEDED(res))
{
if (typeAttrVal.Equals("cite", PR_TRUE, 4))
return PR_TRUE;
}
}
return PR_FALSE;
}
PRBool
nsHTMLEditUtils::IsDescendantOf(nsIDOMNode *aNode, nsIDOMNode *aParent)
{
if (!aNode && !aParent) return PR_FALSE;
if (aNode == aParent) return PR_FALSE;
nsCOMPtr<nsIDOMNode> parent, node = do_QueryInterface(aNode);
nsresult res;
do
{
res = node->GetParentNode(getter_AddRefs(parent));
if (NS_FAILED(res)) return PR_FALSE;
if (parent.get() == aParent) return PR_TRUE;
node = parent;
} while (parent);
return PR_FALSE;
}