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/*******************************************************************************
* Copyright (c) 2009, 2010 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.accessibility;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.internal.ole.win32.*;
class Relation {
Accessible accessible;
COMObject objIAccessibleRelation;
int refCount;
int type;
Accessible[] targets;
static final String[] relationTypeString = {
"controlledBy", //$NON-NLS-1$
"controllerFor", //$NON-NLS-1$
"describedBy", //$NON-NLS-1$
"descriptionFor", //$NON-NLS-1$
"embeddedBy", //$NON-NLS-1$
"embeds", //$NON-NLS-1$
"flowsFrom", //$NON-NLS-1$
"flowsTo", //$NON-NLS-1$
"labelFor", //$NON-NLS-1$
"labelledBy", //$NON-NLS-1$
"memberOf", //$NON-NLS-1$
"nodeChildOf", //$NON-NLS-1$
"parentWindowOf", //$NON-NLS-1$
"popupFor", //$NON-NLS-1$
"subwindowOf", //$NON-NLS-1$
};
static final String[] localizedRelationTypeString = {
SWT.getMessage("SWT_Controlled_By"), //$NON-NLS-1$
SWT.getMessage("SWT_Controller_For"), //$NON-NLS-1$
SWT.getMessage("SWT_Described_By"), //$NON-NLS-1$
SWT.getMessage("SWT_Description_For"), //$NON-NLS-1$
SWT.getMessage("SWT_Embedded_By"), //$NON-NLS-1$
SWT.getMessage("SWT_Embeds"), //$NON-NLS-1$
SWT.getMessage("SWT_Flows_From"), //$NON-NLS-1$
SWT.getMessage("SWT_Flows_To"), //$NON-NLS-1$
SWT.getMessage("SWT_Label_For"), //$NON-NLS-1$
SWT.getMessage("SWT_Labelled_By"), //$NON-NLS-1$
SWT.getMessage("SWT_Member_Of"), //$NON-NLS-1$
SWT.getMessage("SWT_Node_Child_Of"), //$NON-NLS-1$
SWT.getMessage("SWT_Parent_Window_Of"), //$NON-NLS-1$
SWT.getMessage("SWT_Popup_For"), //$NON-NLS-1$
SWT.getMessage("SWT_Subwindow_Of"), //$NON-NLS-1$
};
Relation(Accessible accessible, int type) {
this.accessible = accessible;
this.type = type;
this.targets = new Accessible[0];
AddRef();
}
long /*int*/ getAddress() {
/* The address of a Relation is the address of its IAccessibleRelation COMObject. */
if (objIAccessibleRelation == null) createIAccessibleRelation();
return objIAccessibleRelation.getAddress();
}
void createIAccessibleRelation() {
objIAccessibleRelation = new COMObject(new int[] {2,0,0,1,1,1,2,3}) {
public long /*int*/ method0(long /*int*/[] args) {return QueryInterface(args[0], args[1]);}
public long /*int*/ method1(long /*int*/[] args) {return AddRef();}
public long /*int*/ method2(long /*int*/[] args) {return Release();}
public long /*int*/ method3(long /*int*/[] args) {return get_relationType(args[0]);}
public long /*int*/ method4(long /*int*/[] args) {return get_localizedRelationType(args[0]);}
public long /*int*/ method5(long /*int*/[] args) {return get_nTargets(args[0]);}
public long /*int*/ method6(long /*int*/[] args) {return get_target((int)/*64*/args[0], args[1]);}
public long /*int*/ method7(long /*int*/[] args) {return get_targets((int)/*64*/args[0], args[1], args[2]);}
};
}
/* QueryInterface([in] iid, [out] ppvObject)
* Ownership of ppvObject transfers from callee to caller so reference count on ppvObject
* must be incremented before returning. Caller is responsible for releasing ppvObject.
*/
int QueryInterface(long /*int*/ iid, long /*int*/ ppvObject) {
GUID guid = new GUID();
COM.MoveMemory(guid, iid, GUID.sizeof);
if (COM.IsEqualGUID(guid, COM.IIDIUnknown) || COM.IsEqualGUID(guid, COM.IIDIAccessibleRelation)) {
COM.MoveMemory(ppvObject, new long /*int*/[] { getAddress() }, OS.PTR_SIZEOF);
AddRef();
return COM.S_OK;
}
return COM.E_NOINTERFACE;
}
int AddRef() {
refCount++;
return refCount;
}
int Release() {
refCount--;
if (refCount == 0) {
if (objIAccessibleRelation != null)
objIAccessibleRelation.dispose();
objIAccessibleRelation = null;
}
return refCount;
}
/* IAccessibleRelation::get_relationType([out] pbstrRelationType) */
int get_relationType(long /*int*/ pbstrRelationType) {
setString(pbstrRelationType, relationTypeString[type]);
return COM.S_OK;
}
/* IAccessibleRelation::get_localizedRelationType([out] pbstrLocalizedRelationType) */
int get_localizedRelationType(long /*int*/ pbstrLocalizedRelationType) {
setString(pbstrLocalizedRelationType, localizedRelationTypeString[type]);
return COM.S_OK;
}
/* IAccessibleRelation::get_nTargets([out] pNTargets) */
int get_nTargets(long /*int*/ pNTargets) {
COM.MoveMemory(pNTargets, new int [] { targets.length }, 4);
return COM.S_OK;
}
/* IAccessibleRelation::get_target([in] targetIndex, [out] ppTarget) */
int get_target(int targetIndex, long /*int*/ ppTarget) {
if (targetIndex < 0 || targetIndex >= targets.length) return COM.E_INVALIDARG;
Accessible target = targets[targetIndex];
target.AddRef();
COM.MoveMemory(ppTarget, new long /*int*/[] { target.getAddress() }, OS.PTR_SIZEOF);
return COM.S_OK;
}
/* IAccessibleRelation::get_targets([in] maxTargets, [out] ppTargets, [out] pNTargets) */
int get_targets(int maxTargets, long /*int*/ ppTargets, long /*int*/ pNTargets) {
int count = Math.min(targets.length, maxTargets);
for (int i = 0; i < count; i++) {
Accessible target = targets[i];
target.AddRef();
COM.MoveMemory(ppTargets + i * OS.PTR_SIZEOF, new long /*int*/[] { target.getAddress() }, OS.PTR_SIZEOF);
}
COM.MoveMemory(pNTargets, new int [] { count }, 4);
return COM.S_OK;
}
void addTarget(Accessible target) {
if (containsTarget(target)) return;
Accessible[] newTargets = new Accessible[targets.length + 1];
System.arraycopy(targets, 0, newTargets, 0, targets.length);
newTargets[targets.length] = target;
targets = newTargets;
}
boolean containsTarget(Accessible target) {
for (int i = 0; i < targets.length; i++) {
if (targets[i] == target) return true;
}
return false;
}
void removeTarget(Accessible target) {
if (!containsTarget(target)) return;
Accessible[] newTargets = new Accessible[targets.length - 1];
int j = 0;
for (int i = 0; i < targets.length; i++) {
if (targets[i] != target) {
newTargets[j++] = targets[i];
}
}
targets = newTargets;
}
boolean hasTargets() {
return targets.length > 0;
}
// setString copied from Accessible class
void setString(long /*int*/ psz, String string) {
char[] data = (string + "\0").toCharArray();
long /*int*/ ptr = COM.SysAllocString(data);
COM.MoveMemory(psz, new long /*int*/ [] { ptr }, OS.PTR_SIZEOF);
}
}
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