diff options
Diffstat (limited to 'libjava/classpath/native/jni/gtk-peer/gtkpeer.c')
| -rw-r--r-- | libjava/classpath/native/jni/gtk-peer/gtkpeer.c | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/gtk-peer/gtkpeer.c b/libjava/classpath/native/jni/gtk-peer/gtkpeer.c new file mode 100644 index 00000000000..c99fc48f90f --- /dev/null +++ b/libjava/classpath/native/jni/gtk-peer/gtkpeer.c @@ -0,0 +1,584 @@ +/* gtkpeer.c -- Some GTK peer specific helper functions + Copyright (C) 2007 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +#include "gtkpeer.h" +#include "jni.h" + +/** + * The Pointer class. + */ +static jclass pointerClass; + +/** + * The Pointer constructor. + */ +static jmethodID pointerConstructorMID; + +/** + * The field ID of the data field in the Pointer class. + */ +static jfieldID pointerDataFID; + +/** + * The field ID of the widget field in the GtkGenericPeer class. + */ +static jfieldID widgetFID; + +/** + * The field ID of the globalRef field in the GtkGenericPeer class. + */ +static jfieldID globalRefFID; + +/** + * The field ID of the display field in the GdkGraphicsEnvironment class. + */ +static jfieldID displayFID; + +/** + * The field ID of the screen field in the GdkScreenGraphicsDevice class. + */ +static jfieldID screenFID; + +/** + * The field ID of the nativeFont field in GdkFontPeer. + */ +static jfieldID fontFID; + +/** + * The field ID of the nativeDecoder field in GdkPixbufDecoder. + */ +static jfieldID pixbufLoaderFID; + +/** + * Initializes the IDs of the Pointer* classes. + * + * @param env the JNI environment + */ +void gtkpeer_init_pointer_IDs(JNIEnv* env) +{ +#if SIZEOF_VOID_P == 8 + pointerClass = (*env)->FindClass (env, "gnu/classpath/Pointer64"); + if (pointerClass != NULL) + { + pointerClass = (*env)->NewGlobalRef (env, pointerClass); + pointerDataFID = (*env)->GetFieldID (env, pointerClass, "data", "J"); + pointerConstructorMID = (*env)->GetMethodID (env, pointerClass, "<init>", + "(J)V"); + } +#else +#if SIZEOF_VOID_P == 4 + pointerClass = (*env)->FindClass(env, "gnu/classpath/Pointer32"); + pointerDataFID = (*env)->GetFieldID(env, pointerClass, "data", "I"); + + /* Find the Pointer32 constructor. */ + pointerConstructorMID = (*env)->GetMethodID(env, pointerClass, "<init>", + "(I)V"); +#else +#error "Pointer size is not supported." +#endif /* SIZEOF_VOID_P == 4 */ +#endif /* SIZEOF_VOID_P == 8 */ +} + +/** + * Initializes the field IDs for the widget reference. + * + * @param env the JNI environment + */ +void gtkpeer_init_widget_IDs(JNIEnv *env) +{ + jclass cls; + + /* Find the widget field ID in GtkGenericPeer. */ + cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GtkGenericPeer"); + widgetFID = (*env)->GetFieldID(env, cls, "widget", + "Lgnu/classpath/Pointer;"); + + /* Find the globalRef field in GtkGenericPeer. */ + globalRefFID = (*env)->GetFieldID(env, cls, "globalRef", + "Lgnu/classpath/Pointer;"); +} + +/** + * Stores the GTK widget reference in the GtkGenericPeer object. + * + * @param env the JNI environment + * @param peer the actual peer object + * @param widget the widget reference to store + */ +void gtkpeer_set_widget(JNIEnv *env, jobject peer, void *widget) +{ + jobject obj; + + /* Fetch the widget field object. */ + obj = (*env)->GetObjectField(env, peer, widgetFID); + if (obj == NULL) + { + /* Create if necessary. */ +#if SIZEOF_VOID_P == 8 + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jlong) widget); +#else + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jint) widget); +#endif + (*env)->SetObjectField(env, peer, widgetFID, obj); + } + else + { +#if SIZEOF_VOID_P == 8 + (*env)->SetLongField(env, obj, pointerDataFID, (jlong) widget); +#else + (*env)->SetIntField(env, obj, pointerDataFID, (jint) widget); +#endif + } +} + +/** + * Retrieves the GTK widget reference from a GtkGenericPeer object. + * + * @param env the JNI environment + * @param peer the actual peer object + * + * @return the widget reference + */ +void* gtkpeer_get_widget(JNIEnv *env, jobject peer) +{ + jobject obj; + void *widget; + + /* Fetch the widget field from the peer object. */ + obj = (*env)->GetObjectField(env, peer, widgetFID); + + /* Fetch actual widget pointer. */ +#if SIZEOF_VOID_P == 8 + widget = (void*) (*env)->GetLongField(env, obj, pointerDataFID); +#else + widget = (void*) (*env)->GetIntField(env, obj, pointerDataFID); +#endif + return widget; +} + + +/** + * Stores the global JNI reference of a peer inside the peer. + * + * @param env the JNI environment + * @param peer the peer object + */ +void gtkpeer_set_global_ref(JNIEnv *env, jobject peer) +{ + jobject obj; + void* globalRef; + + /* Create global reference. */ + globalRef = (*env)->NewGlobalRef(env, peer); + + /* Fetch the globalRef field object. */ + obj = (*env)->GetObjectField(env, peer, globalRefFID); + if (obj == NULL) + { + /* Create if necessary. */ +#if SIZEOF_VOID_P == 8 + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jlong) globalRef); +#else + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jint) globalRef); +#endif + (*env)->SetObjectField(env, peer, globalRefFID, obj); + } + else + { +#if SIZEOF_VOID_P == 8 + (*env)->SetLongField(env, obj, pointerDataFID, (jlong) globalRef); +#else + (*env)->SetIntField(env, obj, pointerDataFID, (jint) globalRef); +#endif + } +} + +/** + * Retrieves the global reference from a peer. + * + * @param env the JNI environment + * @param peer the peer object + * + * @return the global reference + */ +void* gtkpeer_get_global_ref(JNIEnv *env, jobject peer) +{ + jobject obj; + void *globalRef; + + /* Fetch the globalRef field from the peer object. */ + obj = (*env)->GetObjectField(env, peer, globalRefFID); + + /* Fetch actual globalRef pointer. */ +#if SIZEOF_VOID_P == 8 + globalRef = (void*) (*env)->GetLongField(env, obj, pointerDataFID); +#else + globalRef = (void*) (*env)->GetIntField(env, obj, pointerDataFID); +#endif + return globalRef; +} + +/** + * Deletes the global reference of a peer. This is necessary in order to + * allow the peer to be garbage collected. + * + * @param env the JNI environment + * @param peer the peer object. + */ +void gtkpeer_del_global_ref(JNIEnv* env, jobject peer) +{ + jobject obj; + void *globalRef; + + /* Fetch the globalRef field from the peer object. */ + obj = (*env)->GetObjectField(env, peer, globalRefFID); + + /* Fetch actual globalRef pointer. */ +#if SIZEOF_VOID_P == 8 + globalRef = (void*) (*env)->GetLongField(env, obj, pointerDataFID); +#else + globalRef = (void*) (*env)->GetIntField(env, obj, pointerDataFID); +#endif + (*env)->DeleteGlobalRef(env, globalRef); +} + +/** + * Initializes the fieldIDs for the display and screen fields. + * + * @param env the JNI environment + */ +void gtkpeer_init_display_IDs(JNIEnv* env) +{ + jclass cls; + + /* Find the display field ID in GdkGraphicsEnvironment. */ + cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GdkGraphicsEnvironment"); + displayFID = (*env)->GetFieldID(env, cls, "display", + "Lgnu/classpath/Pointer;"); +} + +/** + * Sets the native display pointer in the GdkGraphicsEnvironment object. + * + * @param env the JNI environment + * @param graphicsenv the GdkGraphicsEnvironment object + * @param display the native display pointer + */ +void gtkpeer_set_display(JNIEnv* env, jobject graphicsenv, void* display) +{ + jobject obj; + + /* Fetch the display field object. */ + obj = (*env)->GetObjectField(env, graphicsenv, displayFID); + if (obj == NULL) + { + /* Create if necessary. */ +#if SIZEOF_VOID_P == 8 + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jlong) display); +#else + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jint) display); +#endif + (*env)->SetObjectField(env, graphicsenv, displayFID, obj); + } + else + { +#if SIZEOF_VOID_P == 8 + (*env)->SetLongField(env, obj, pointerDataFID, (jlong) display); +#else + (*env)->SetIntField(env, obj, pointerDataFID, (jint) display); +#endif + } +} + +/** + * Fetches the native display pointer from the GdkGraphicsEnvironment object. + * + * @param env the JNI environment + * @param graphicsenv the GdkGraphicsEnvironment object + * + * @return the native display pointer + */ +void* gtkpeer_get_display(JNIEnv* env, jobject graphicsenv) +{ + jobject obj; + void *display; + + /* Fetch the display field from the peer object. */ + obj = (*env)->GetObjectField(env, graphicsenv, displayFID); + + /* Fetch actual display pointer. */ +#if SIZEOF_VOID_P == 8 + display = (void*) (*env)->GetLongField(env, obj, pointerDataFID); +#else + display = (void*) (*env)->GetIntField(env, obj, pointerDataFID); +#endif + return display; +} + +/** + * Initializes the fieldIDs for the screen field. + * + * @param env the JNI environment + */ +void gtkpeer_init_screen_IDs(JNIEnv* env) +{ + jclass cls; + + /* Find the display field ID in GdkScreenGraphicsDevice. */ + cls = (*env)->FindClass(env, + "gnu/java/awt/peer/gtk/GdkScreenGraphicsDevice"); + screenFID = (*env)->GetFieldID(env, cls, "screen", + "Lgnu/classpath/Pointer;"); +} + +/** + * Sets the native screen in the GdkScreenGraphicsDevice object. + * + * @param env the JNI environment + * @param screen_graphics_device the GdkScreenGraphicsDevice object + * @param ptr the native screen pointer + */ +void gtkpeer_set_screen(JNIEnv* env, jobject screen_graphics_device, + void* ptr) +{ + jobject obj; + + /* Fetch the screen field object. */ + obj = (*env)->GetObjectField(env, screen_graphics_device, screenFID); + if (obj == NULL) + { + /* Create if necessary. */ +#if SIZEOF_VOID_P == 8 + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jlong) ptr); +#else + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jint) ptr); +#endif + (*env)->SetObjectField(env, screen_graphics_device, screenFID, obj); + } + else + { +#if SIZEOF_VOID_P == 8 + (*env)->SetLongField(env, obj, pointerDataFID, (jlong) ptr); +#else + (*env)->SetIntField(env, obj, pointerDataFID, (jint) ptr); +#endif + } +} + +/** + * Fetches the native screen pointer from the GdkScreenGraphicsDevice object. + * + * @param env the JNI environment + * @param screen_graphics_device the GdkScreenGraphicsDevice object + * + * @return the native screen pointer + */ +void* gtkpeer_get_screen(JNIEnv* env, jobject screen_graphics_device) +{ + jobject obj; + void *screen; + + /* Fetch the display field from the peer object. */ + obj = (*env)->GetObjectField(env, screen_graphics_device, screenFID); + + /* Fetch actual display pointer. */ +#if SIZEOF_VOID_P == 8 + screen = (void*) (*env)->GetLongField(env, obj, pointerDataFID); +#else + screen = (void*) (*env)->GetIntField(env, obj, pointerDataFID); +#endif + return screen; +} + +/** + * Initializes the field IDs for fonts. + * + * @param env the JNI environment + */ +void gtkpeer_init_font_IDs(JNIEnv* env) +{ + jclass cls; + + /* Find the nativeFont field ID in GdkFontPeer. */ + cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GdkFontPeer"); + fontFID = (*env)->GetFieldID(env, cls, "nativeFont", + "Lgnu/classpath/Pointer;"); +} + +/** + * Sets the native font in the nativeFont field in GdkFontPeer. + * + * @param env the JNI environment + * @param font_peer the font peer object + * @param font the actual native font reference + */ +void gtkpeer_set_font(JNIEnv* env, jobject font_peer, void* font) +{ + jobject obj; + + /* Fetch the nativeFont field object. */ + obj = (*env)->GetObjectField(env, font_peer, fontFID); + if (obj == NULL) + { + /* Create if necessary. */ +#if SIZEOF_VOID_P == 8 + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jlong) font); +#else + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jint) font); +#endif + (*env)->SetObjectField(env, font_peer, fontFID, obj); + } + else + { +#if SIZEOF_VOID_P == 8 + (*env)->SetLongField(env, obj, pointerDataFID, (jlong) font); +#else + (*env)->SetIntField(env, obj, pointerDataFID, (jint) font); +#endif + } +} + +/** + * Fetches the native font reference from the GdkFontPeer object. + * + * @param env the JNI environment + * @param font_peer the font peer object + * + * @return the native font structure + */ +void* gtkpeer_get_font(JNIEnv* env, jobject font_peer) +{ + jobject obj; + void *font; + + /* Fetch the nativeFont field from the peer object. */ + obj = (*env)->GetObjectField(env, font_peer, fontFID); + + /* Fetch actual font pointer. */ +#if SIZEOF_VOID_P == 8 + font = (void*) (*env)->GetLongField(env, obj, pointerDataFID); +#else + font = (void*) (*env)->GetIntField(env, obj, pointerDataFID); +#endif + return font; +} + +/** + * Initializes the field IDs for pixbuf decoder. + * + * @param env the JNI environment + */ +void gtkpeer_init_pixbuf_IDs(JNIEnv* env) +{ + jclass cls; + + /* Find the nativeFont field ID in GdkFontPeer. */ + cls = (*env)->FindClass(env, "gnu/java/awt/peer/gtk/GdkPixbufDecoder"); + pixbufLoaderFID = (*env)->GetFieldID(env, cls, "nativeDecoder", + "Lgnu/classpath/Pointer;"); +} + +/** + * Sets the native font in the nativeFont field in GdkFontPeer. + * + * @param env the JNI environment + * @param pixbuf_dec the pixbuf decoder object + * @param pixbuf_loader the native pixbuf loader + */ +void gtkpeer_set_pixbuf_loader(JNIEnv* env, jobject pixbuf_dec, + void* pixbuf_loader) +{ + jobject obj; + + /* Fetch the nativeDecoder field object. */ + obj = (*env)->GetObjectField(env, pixbuf_dec, pixbufLoaderFID); + if (obj == NULL) + { + /* Create if necessary. */ +#if SIZEOF_VOID_P == 8 + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jlong) pixbuf_loader); +#else + obj = (*env)->NewObject(env, pointerClass, pointerConstructorMID, + (jint) pixbuf_loader); +#endif + (*env)->SetObjectField(env, pixbuf_dec, pixbufLoaderFID, obj); + } + else + { +#if SIZEOF_VOID_P == 8 + (*env)->SetLongField(env, obj, pointerDataFID, (jlong) pixbuf_loader); +#else + (*env)->SetIntField(env, obj, pointerDataFID, (jint) pixbuf_loader); +#endif + } +} + +/** + * Fetches the native pixbuf loader reference from the GdkPixbufDecoder object. + * + * @param env the JNI environment + * @param pixbuf_dec the pixbuf decoder object + * + * @return the native pixbuf loader + */ +void* gtkpeer_get_pixbuf_loader(JNIEnv* env, jobject pixbuf_dec) +{ + jobject obj; + void *loader; + + /* Fetch the nativeFont field from the peer object. */ + obj = (*env)->GetObjectField(env, pixbuf_dec, pixbufLoaderFID); + + /* Fetch actual font pointer. */ +#if SIZEOF_VOID_P == 8 + loader = (void*) (*env)->GetLongField(env, obj, pointerDataFID); +#else + loader = (void*) (*env)->GetIntField(env, obj, pointerDataFID); +#endif + return loader; +} |