JDK14/Java14源码在线阅读

/*
 * Copyright (c) 1996, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#ifndef AWT_MENUITEM_H
#define AWT_MENUITEM_H

#include "awt_Object.h"
#include "awt_Component.h"

#include <java_awt_MenuItem.h>
#include <sun_awt_windows_WMenuItemPeer.h>
#include <java_awt_Menu.h>
#include <sun_awt_windows_WMenuPeer.h>
#include <java_awt_MenuComponent.h>
#include <java_awt_FontMetrics.h>

class AwtMenu;


/************************************************************************
 * MenuItem class
 */

class AwtMenuItem : public AwtObject {
public:

    /* java.awt.MenuItem fields */
    static jfieldID labelID;
    static jfieldID enabledID;

    /* java.awt.CheckboxMenuItem fields */
    static jfieldID stateID;

    /* sun.awt.windows.WMenuItemPeer fields */
    static jfieldID isCheckboxID;
    static jfieldID shortcutLabelID;

    static jmethodID getDefaultFontMID;

    AwtMenuItem();
    virtual ~AwtMenuItem();

    virtual void Dispose();

    virtual LPCTSTR GetClassName();

    static AwtMenuItem* Create(jobject self, jobject menu);

    INLINE AwtMenu* GetMenuContainer() { return m_menuContainer; }
    INLINE void SetMenuContainer(AwtMenu* menu) { m_menuContainer = menu; }
    INLINE UINT GetID() { return m_Id; }
    INLINE void SetID(UINT id) { m_Id = id; }
    INLINE void SetNewID() {
        DASSERT(!m_freeId);
        m_Id = AwtToolkit::GetInstance().CreateCmdID(this);
        m_freeId = TRUE;
    }

    // Convert Language ID to CodePage
    static UINT LangToCodePage(LANGID idLang);
    /* Execute the command associated with this item. */
    virtual void DoCommand();

    void LinkObjects(JNIEnv *env, jobject peer);

    /* for multifont menuitem */
    INLINE jstring GetJavaString(JNIEnv *env) {
        if (env->EnsureLocalCapacity(2) < 0) {
            return NULL;
        }
        jobject target = GetTarget(env);
        jstring res = (jstring)env->GetObjectField(target,
                                                   AwtMenuItem::labelID);
        env->DeleteLocalRef(target);
        return res;
    }
// Added by waleed for BIDI Support
    // returns the right to left status
    INLINE static BOOL GetRTLReadingOrder() {
        return sm_rtlReadingOrder;
    }
    // returns the right to left status
    INLINE static BOOL GetRTL() {
        return sm_rtl;
    }
    INLINE static LANGID GetSubLanguage() {
        return SUBLANGID(m_idLang);
    }
    // returns the current code page that should be used in
    // all MultiByteToWideChar and WideCharToMultiByte calls.
    // This code page should also be use in IsDBCSLeadByteEx.
    INLINE static UINT GetCodePage() {
        return m_CodePage;
    }
    INLINE static LANGID GetInputLanguage() {
        return m_idLang;
    }
// end waleed

    virtual void DrawItem(DRAWITEMSTRUCT& drawInfo);
    void DrawSelf(DRAWITEMSTRUCT& drawInfo);
    static void AdjustCheckWidth(int& checkWidth);

    virtual void MeasureItem(HDC hDC, MEASUREITEMSTRUCT& measureInfo);
    void MeasureSelf(HDC hDC, MEASUREITEMSTRUCT& measureInfo);

    jobject GetFont(JNIEnv *env);
    jobject GetFontMetrics(JNIEnv *env, jobject font);
    jobject GetDefaultFont(JNIEnv *env);

    virtual BOOL IsTopMenu();
    void DrawCheck(HDC hDC, RECT rect);

    void SetLabel(LPCTSTR sb);
    virtual void Enable(BOOL isEnabled);
    virtual void UpdateContainerLayout();
    virtual void RedrawMenuBar();
    void SetState(BOOL isChecked);

    /*
     * Windows message handler functions
     */
    MsgRouting WmNotify(UINT notifyCode);

    virtual BOOL IsDisabledAndPopup() {
        return FALSE;
    }
    virtual BOOL IsSeparator();

    // invoked on Toolkit thread
    static void _SetState(void *param);
    static void _SetEnable(void *param);
    static void _SetLabel(void *param);
    static void _UpdateLayout(void *param);

protected:
    AwtMenu* m_menuContainer;  /* The menu object containing this item */
    UINT m_Id;                 /* The id of this item */

    static BOOL CheckMenuCreation(JNIEnv *env, jobject self, HMENU hMenu);
    virtual void RemoveCmdID();

private:

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