mmarquee.automation.uiautomation.IUIAutomationInvokePatternConverter Maven / Gradle / Ivy

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A Java library that wraps the MS UIAutomation library.

There is a newer version: 0.7.0

/*
 * 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.automation.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;

/**
 * Created by Mark Humphreyson 05/06/2017.
 */
public class IUIAutomationInvokePatternConverter {
    private static int UIAutomationInvokePattern_Methods = 4; // 0-2 IUnknown, 3 IUIAutomationInvokePattern

    public static IUIAutomationInvokePattern PointerToInterface(final PointerByReference ptr) {
        final Pointer interfacePointer = ptr.getValue();
        final Pointer vTablePointer = interfacePointer.getPointer(0);
        final Pointer[] vTable = new Pointer[UIAutomationInvokePattern_Methods];
        vTablePointer.read(0, vTable, 0, vTable.length);
        return new IUIAutomationInvokePattern() {

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

            @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 invoke() {
                Function f = Function.getFunction(vTable[3], Function.ALT_CONVENTION);
                return f.invokeInt(new Object[]{interfacePointer});
            }

        };
    }
}