mmarquee.uiautomation.IUIAutomationTreeWalkerConverter Maven / Gradle / Ivy

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A Java library that wraps the MS UIAutomation library.
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/*
 * Copyright 2016-17 [email protected]
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package mmarquee.uiautomation;

import com.sun.jna.Function;
import com.sun.jna.Pointer;
import com.sun.jna.platform.win32.Guid;
import com.sun.jna.platform.win32.WinNT;
import com.sun.jna.ptr.PointerByReference;

/**
 * @author Mark Humphreys
 * Date 05/06/2017.
 */
public class IUIAutomationTreeWalkerConverter {
    private static int METHODS = 16; // 0-2 IUnknown,
                                     // 3-15 IUIAutomationTreeWalker

    public static IUIAutomationTreeWalker pointerToInterface(
            final PointerByReference ptr) {
        final Pointer interfacePointer = ptr.getValue();
        final Pointer vTablePointer = interfacePointer.getPointer(0);
        final Pointer[] vTable = new Pointer[METHODS];
        vTablePointer.read(0, vTable, 0, vTable.length);
        return new IUIAutomationTreeWalker() {
            // IUnknown

            @Override
            public WinNT.HRESULT QueryInterface(Guid.REFIID byValue,
                                                PointerByReference pbr) {
                Function f = Function.getFunction(vTable[0],
                        Function.ALT_CONVENTION);
                return new WinNT.HRESULT(
                        f.invokeInt(
                                new Object[]{interfacePointer, byValue, pbr}));
            }

            @Override
            public int AddRef() {
                Function f = Function.getFunction(vTable[1],
                        Function.ALT_CONVENTION);
                return f.invokeInt(new Object[]{interfacePointer});
            }

            public int Release() {
                Function f = Function.getFunction(vTable[2],
                        Function.ALT_CONVENTION);
                return f.invokeInt(new Object[]{interfacePointer});
            }

            public int getParentElement(Pointer element,
                                        PointerByReference parent) {
                Function f = Function.getFunction(vTable[3],
                        Function.ALT_CONVENTION);
                return f.invokeInt(
                        new Object[]{interfacePointer, element, parent});
            }

            public int getFirstChildElement(Pointer element,
                                            PointerByReference first) {
                Function f = Function.getFunction(vTable[4],
                        Function.ALT_CONVENTION);
                return f.invokeInt(
                        new Object[]{interfacePointer, element, first});
            }

            public int getLastChildElement(Pointer element,
                                           PointerByReference last) {
                Function f = Function.getFunction(vTable[5],
                        Function.ALT_CONVENTION);
                return f.invokeInt(
                        new Object[]{interfacePointer, element, last});
            }

            public int getNextSiblingElement(Pointer element,
                                             PointerByReference next) {
                Function f = Function.getFunction(vTable[6],
                        Function.ALT_CONVENTION);
                return f.invokeInt(
                        new Object[]{interfacePointer, element, next});
            }

            public int getPreviousSiblingElement(Pointer element,
                                                 PointerByReference previous) {
                Function f = Function.getFunction(vTable[7],
                        Function.ALT_CONVENTION);
                return f.invokeInt(
                        new Object[]{interfacePointer, element, previous});
            }

            public int getCondition(PointerByReference condition) {
                Function f = Function.getFunction(vTable[15],
                        Function.ALT_CONVENTION);
                return f.invokeInt(new Object[]{interfacePointer, condition});
            }
        };
    }
}