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nsMaiHyperlink.cpp
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nsMaiHyperlink.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=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
* Sun Microsystems, Inc.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bolian Yin (bolian.yin@sun.com)
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 "nsIURI.h"
#include "nsMaiHyperlink.h"
/* MaiAtkHyperlink */
#define MAI_TYPE_ATK_HYPERLINK (mai_atk_hyperlink_get_type ())
#define MAI_ATK_HYPERLINK(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj),\
MAI_TYPE_ATK_HYPERLINK, MaiAtkHyperlink))
#define MAI_ATK_HYPERLINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass),\
MAI_TYPE_ATK_HYPERLINK, MaiAtkHyperlinkClass))
#define MAI_IS_ATK_HYPERLINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj),\
MAI_TYPE_ATK_HYPERLINK))
#define MAI_IS_ATK_HYPERLINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),\
MAI_TYPE_ATK_HYPERLINK))
#define MAI_ATK_HYPERLINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),\
MAI_TYPE_ATK_HYPERLINK, MaiAtkHyperlinkClass))
/**
* This MaiAtkHyperlink is a thin wrapper, in the MAI namespace,
* for AtkHyperlink
*/
struct MaiAtkHyperlink
{
AtkHyperlink parent;
/*
* The MaiHyperlink whose properties and features are exported via this
* hyperlink instance.
*/
MaiHyperlink *maiHyperlink;
};
struct MaiAtkHyperlinkClass
{
AtkHyperlinkClass parent_class;
};
GType mai_atk_hyperlink_get_type(void);
G_BEGIN_DECLS
/* callbacks for AtkHyperlink */
static void classInitCB(AtkHyperlinkClass *aClass);
static void finalizeCB(GObject *aObj);
/* callbacks for AtkHyperlink virtual functions */
static gchar *getUriCB(AtkHyperlink *aLink, gint aLinkIndex);
static AtkObject *getObjectCB(AtkHyperlink *aLink, gint aLinkIndex);
static gint getEndIndexCB(AtkHyperlink *aLink);
static gint getStartIndexCB(AtkHyperlink *aLink);
static gboolean isValidCB(AtkHyperlink *aLink);
static gint getAnchorCountCB(AtkHyperlink *aLink);
G_END_DECLS
static gpointer parent_class = NULL;
static nsAccessible*
get_accessible_hyperlink(AtkHyperlink *aHyperlink);
GType
mai_atk_hyperlink_get_type(void)
{
static GType type = 0;
if (!type) {
static const GTypeInfo tinfo = {
sizeof(MaiAtkHyperlinkClass),
(GBaseInitFunc)NULL,
(GBaseFinalizeFunc)NULL,
(GClassInitFunc)classInitCB,
(GClassFinalizeFunc)NULL,
NULL, /* class data */
sizeof(MaiAtkHyperlink), /* instance size */
0, /* nb preallocs */
(GInstanceInitFunc)NULL,
NULL /* value table */
};
type = g_type_register_static(ATK_TYPE_HYPERLINK,
"MaiAtkHyperlink",
&tinfo, GTypeFlags(0));
}
return type;
}
MaiHyperlink::MaiHyperlink(nsAccessible* aHyperLink) :
mHyperlink(aHyperLink),
mMaiAtkHyperlink(nsnull)
{
}
MaiHyperlink::~MaiHyperlink()
{
if (mMaiAtkHyperlink) {
MAI_ATK_HYPERLINK(mMaiAtkHyperlink)->maiHyperlink = nsnull;
g_object_unref(mMaiAtkHyperlink);
}
}
AtkHyperlink *
MaiHyperlink::GetAtkHyperlink(void)
{
NS_ENSURE_TRUE(mHyperlink, nsnull);
if (mMaiAtkHyperlink)
return mMaiAtkHyperlink;
if (!mHyperlink->IsHyperLink())
return nsnull;
mMaiAtkHyperlink =
reinterpret_cast<AtkHyperlink *>
(g_object_new(mai_atk_hyperlink_get_type(), NULL));
NS_ASSERTION(mMaiAtkHyperlink, "OUT OF MEMORY");
NS_ENSURE_TRUE(mMaiAtkHyperlink, nsnull);
/* be sure to initialize it with "this" */
MaiHyperlink::Initialize(mMaiAtkHyperlink, this);
return mMaiAtkHyperlink;
}
/* static */
/* remember to call this static function when a MaiAtkHyperlink
* is created
*/
nsresult
MaiHyperlink::Initialize(AtkHyperlink *aObj, MaiHyperlink *aHyperlink)
{
NS_ENSURE_ARG(MAI_IS_ATK_HYPERLINK(aObj));
NS_ENSURE_ARG(aHyperlink);
/* initialize hyperlink */
MAI_ATK_HYPERLINK(aObj)->maiHyperlink = aHyperlink;
return NS_OK;
}
/* static functions for ATK callbacks */
void
classInitCB(AtkHyperlinkClass *aClass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(aClass);
parent_class = g_type_class_peek_parent(aClass);
aClass->get_uri = getUriCB;
aClass->get_object = getObjectCB;
aClass->get_end_index = getEndIndexCB;
aClass->get_start_index = getStartIndexCB;
aClass->is_valid = isValidCB;
aClass->get_n_anchors = getAnchorCountCB;
gobject_class->finalize = finalizeCB;
}
void
finalizeCB(GObject *aObj)
{
NS_ASSERTION(MAI_IS_ATK_HYPERLINK(aObj), "Invalid MaiAtkHyperlink");
if (!MAI_IS_ATK_HYPERLINK(aObj))
return;
MaiAtkHyperlink *maiAtkHyperlink = MAI_ATK_HYPERLINK(aObj);
maiAtkHyperlink->maiHyperlink = nsnull;
/* call parent finalize function */
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize(aObj);
}
gchar *
getUriCB(AtkHyperlink *aLink, gint aLinkIndex)
{
nsAccessible* hyperlink = get_accessible_hyperlink(aLink);
NS_ENSURE_TRUE(hyperlink, nsnull);
MaiAtkHyperlink *maiAtkHyperlink = MAI_ATK_HYPERLINK(aLink);
nsCOMPtr<nsIURI> uri = hyperlink->GetAnchorURI(aLinkIndex);
if (!uri)
return nsnull;
nsCAutoString cautoStr;
nsresult rv = uri->GetSpec(cautoStr);
NS_ENSURE_SUCCESS(rv, nsnull);
return g_strdup(cautoStr.get());
}
AtkObject *
getObjectCB(AtkHyperlink *aLink, gint aLinkIndex)
{
nsAccessible* hyperlink = get_accessible_hyperlink(aLink);
NS_ENSURE_TRUE(hyperlink, nsnull);
nsAccessible* anchor = hyperlink->GetAnchor(aLinkIndex);
NS_ENSURE_TRUE(anchor, nsnull);
AtkObject *atkObj = nsAccessibleWrap::GetAtkObject(anchor);
//no need to add ref it, because it is "get" not "ref"
return atkObj;
}
gint
getEndIndexCB(AtkHyperlink *aLink)
{
nsAccessible* hyperlink = get_accessible_hyperlink(aLink);
NS_ENSURE_TRUE(hyperlink, -1);
return static_cast<gint>(hyperlink->EndOffset());
}
gint
getStartIndexCB(AtkHyperlink *aLink)
{
nsAccessible* hyperlink = get_accessible_hyperlink(aLink);
NS_ENSURE_TRUE(hyperlink, -1);
return static_cast<gint>(hyperlink->StartOffset());
}
gboolean
isValidCB(AtkHyperlink *aLink)
{
nsAccessible* hyperlink = get_accessible_hyperlink(aLink);
NS_ENSURE_TRUE(hyperlink, FALSE);
return static_cast<gboolean>(hyperlink->IsValid());
}
gint
getAnchorCountCB(AtkHyperlink *aLink)
{
nsAccessible* hyperlink = get_accessible_hyperlink(aLink);
NS_ENSURE_TRUE(hyperlink, -1);
return static_cast<gint>(hyperlink->AnchorCount());
}
// Check if aHyperlink is a valid MaiHyperlink, and return the
// HyperLinkAccessible related.
nsAccessible*
get_accessible_hyperlink(AtkHyperlink *aHyperlink)
{
NS_ENSURE_TRUE(MAI_IS_ATK_HYPERLINK(aHyperlink), nsnull);
MaiHyperlink * maiHyperlink =
MAI_ATK_HYPERLINK(aHyperlink)->maiHyperlink;
NS_ENSURE_TRUE(maiHyperlink != nsnull, nsnull);
NS_ENSURE_TRUE(maiHyperlink->GetAtkHyperlink() == aHyperlink, nsnull);
return maiHyperlink->GetAccHyperlink();
}