1 /*

     2  * Copyright 1995-2001 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 #ifdef HEADLESS

    27     #error This file should not be included in headless library

    28 #endif

    29 

    30 #include "awt_p.h"

    31 #include "java_awt_Color.h"

    32 #include "java_awt_Font.h"

    33 #include "java_awt_Label.h"

    34 #include "sun_awt_motif_MLabelPeer.h"

    35 #include "sun_awt_motif_MComponentPeer.h"

    36 

    37 #include "awt_Component.h"

    38 

    39 #include "multi_font.h"

    40 #include <jni.h>

    41 #include <jni_util.h>

    42 

    43 extern struct MComponentPeerIDs mComponentPeerIDs;

    44 extern AwtGraphicsConfigDataPtr

    45     copyGraphicsConfigToPeer(JNIEnv *env, jobject this);

    46 

    47 static char emptyString[] = "";

    48 

    49 

    50 /*

    51  * Class:     sun_awt_motif_MLabelPeer

    52  * Method:    create

    53  * Signature: (Lsun/awt/motif/MComponentPeer;)V

    54  */

    55 JNIEXPORT void JNICALL Java_sun_awt_motif_MLabelPeer_create

    56   (JNIEnv *env, jobject this, jobject parent)

    57 {

    58     struct ComponentData *cdata;

    59     struct ComponentData *wdata;

    60     jobject target;

    61     jobject globalRef = awtJNI_CreateAndSetGlobalRef(env, this);

    62     AwtGraphicsConfigDataPtr adata;

    63     AWT_LOCK();

    64 

    65     if (JNU_IsNull(env, parent)) {

    66         JNU_ThrowNullPointerException(env, "NullPointerException");

    67         AWT_UNLOCK();

    68 

    69         return;

    70     }

    71     target = (*env)->GetObjectField(env, this, mComponentPeerIDs.target);

    72     wdata = (struct ComponentData *)

    73         JNU_GetLongFieldAsPtr(env, parent, mComponentPeerIDs.pData);

    74 

    75     if (JNU_IsNull(env, target) || wdata == NULL) {

    76         JNU_ThrowNullPointerException(env, "NullPointerException");

    77         AWT_UNLOCK();

    78 

    79         return;

    80     }

    81     cdata = ZALLOC(ComponentData);

    82     if (cdata == NULL) {

    83         JNU_ThrowOutOfMemoryError(env, "OutOfMemoryError");

    84         AWT_UNLOCK();

    85         return;

    86     }

    87     JNU_SetLongFieldFromPtr(env, this, mComponentPeerIDs.pData,cdata);

    88 

    89     adata = copyGraphicsConfigToPeer(env, this);

    90 

    91     cdata->widget = XtVaCreateManagedWidget("",

    92                                             xmLabelWidgetClass, wdata->widget,

    93                                             XmNhighlightThickness, 0,

    94                                             XmNalignment, XmALIGNMENT_BEGINNING,

    95                                             XmNrecomputeSize, False,

    96                                             XmNuserData, (XtPointer) globalRef,

    97                                             XmNtraversalOn, True,

    98                                             XmNscreen,

    99                                             ScreenOfDisplay(awt_display,

   100                                                adata->awt_visInfo.screen),

   101                                             XmNfontList, getMotifFontList(),

   102                                             NULL);

   103     XtSetMappedWhenManaged(cdata->widget, False);

   104     AWT_UNLOCK();

   105 }

   106 

   107 /*

   108  * Class:     sun_awt_motif_MLabelPeer

   109  * Method:    setText

   110  * Signature: (Ljava/lang/String;)V

   111  */

   112 JNIEXPORT void JNICALL Java_sun_awt_motif_MLabelPeer_setText

   113   (JNIEnv *env, jobject this, jstring label)

   114 {

   115     char *clabel = NULL;

   116     char *clabelEnd;

   117     struct ComponentData *cdata;

   118     XmString xim = NULL;

   119     jobject font;

   120     Boolean isMultiFont;

   121 

   122     AWT_LOCK();

   123 

   124     font = awtJNI_GetFont(env, this);

   125     isMultiFont = awtJNI_IsMultiFont(env, font);

   126 

   127     cdata = (struct ComponentData *)

   128         JNU_GetLongFieldAsPtr(env,this,mComponentPeerIDs.pData);

   129     if (cdata == NULL || cdata->widget == NULL) {

   130         JNU_ThrowNullPointerException(env, "NullPointerException");

   131         AWT_UNLOCK();

   132         return;

   133     }

   134     if (JNU_IsNull(env, label)) {

   135         clabel = emptyString;

   136     } else {

   137         if (isMultiFont) {

   138             if ((*env)->GetStringLength(env, label) <= 0) {

   139                 xim = XmStringCreateLocalized("");

   140             } else {

   141                 xim = awtJNI_MakeMultiFontString(env, label, font);

   142             }

   143         } else {

   144             clabel = (char *) JNU_GetStringPlatformChars(env, label, NULL);

   145 

   146             /* scan for any \n's and terminate the string at that point */

   147             clabelEnd = strchr(clabel, '\n');

   148             if (clabelEnd != NULL) {

   149                 *clabelEnd = '\0';

   150             }

   151         }

   152     }

   153 

   154     if (!isMultiFont) {

   155         xim = XmStringCreate(clabel, "labelFont");

   156     }

   157     XtVaSetValues(cdata->widget, XmNlabelString, xim, NULL);

   158 

   159     if (!isMultiFont) {

   160         /* Must test for "" too! */

   161         if (clabel != NULL && (*clabel != '\0')) {

   162             JNU_ReleaseStringPlatformChars(env, label, (const char *) clabel);

   163         }

   164     }

   165     XmStringFree(xim);

   166     AWT_FLUSH_UNLOCK();

   167 }

   168 

   169 /*

   170  * Class:     sun_awt_motif_MLabelPeer

   171  * Method:    setAlignment

   172  * Signature: (I)V

   173  */

   174 JNIEXPORT void JNICALL Java_sun_awt_motif_MLabelPeer_setAlignment

   175   (JNIEnv *env, jobject this, jint alignment)

   176 {

   177     struct ComponentData *cdata;

   178 

   179     AWT_LOCK();

   180 

   181     cdata = (struct ComponentData *)

   182         JNU_GetLongFieldAsPtr(env,this,mComponentPeerIDs.pData);

   183     if (cdata == NULL || cdata->widget == NULL) {

   184         JNU_ThrowNullPointerException(env, "NullPointerException");

   185         AWT_UNLOCK();

   186         return;

   187     }

   188     switch (alignment) {

   189         case java_awt_Label_LEFT:

   190             XtVaSetValues(cdata->widget,

   191                           XmNalignment, XmALIGNMENT_BEGINNING,

   192                           NULL);

   193             break;

   194 

   195         case java_awt_Label_CENTER:

   196             XtVaSetValues(cdata->widget,

   197                           XmNalignment, XmALIGNMENT_CENTER,

   198                           NULL);

   199             break;

   200 

   201         case java_awt_Label_RIGHT:

   202             XtVaSetValues(cdata->widget,

   203                           XmNalignment, XmALIGNMENT_END,

   204                           NULL);

   205             break;

   206 

   207         default:

   208             break;

   209     }

   210 

   211     AWT_FLUSH_UNLOCK();

   212 }