trunk/src/html.c

/*
 * Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
 *
 * This file is part of GPXView.
 *
 * GPXView 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 3 of the License, or
 * (at your option) any later version.
 *
 * GPXView 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 GPXView.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "gpxview.h"

typedef struct load_context {
  int active;
  GMutex *mutex;
  GtkWidget *view;
  char *url, *path;
  GtkHTMLStream *stream;
  struct load_context *next;
} load_context_t;

typedef struct {
  appdata_t *appdata;
  cache_t *cache;
  GtkWidget *view;
  load_context_t *load_context;
} http_context_t;

static unsigned long name_hash(const char *name) {
  unsigned long val = 0;

  while(*name) {
    val = (val<<8) ^ (val >> 24) ^ (*name & 0xff);
    name++;
  }

  return val;
}

void release_load_context(GThread *self, load_context_t *context) {
  /* this must be atomar, so acquire a lock */

  printf("%p: freeing context at %p\n", self, context);

  g_mutex_lock(context->mutex);

  /* don't do much if the other thread still uses this */
  if(context->active) {
    printf("  still active -> just close link\n");

    /* close link to view as the thread is either done or */
    /* main wants to close the view */
    gtk_html_end(GTK_HTML(context->view), context->stream, 
                 GTK_HTML_STREAM_OK);

    context->active = FALSE;
    g_mutex_unlock(context->mutex);
    return;
  }

  /* ok, other thread is also gone -> we can destroy everything */
  printf("  not active -> destroy\n");

  /* just free everything */
  g_mutex_unlock(context->mutex);
  free(context->url);
  free(context->path);
  free(context);
}

gpointer loader_thread(gpointer data) {
  GThread *self = g_thread_self();

  GnomeVFSResult result;
  GnomeVFSHandle *handle;
  char buffer[4096];
  GnomeVFSFileSize bytes_read;

  load_context_t *context = (load_context_t*)data;

  printf("%p: loader thread for %s running\n", self, context->url);

  result = gnome_vfs_open(&handle, context->url, GNOME_VFS_OPEN_READ);
  if(result != GNOME_VFS_OK) {
    g_print("%p: open error: %s\n", self, gnome_vfs_result_to_string(result));

    release_load_context(self, context);
    return NULL;
  }
  
  /* try to open file for writing */
  FILE *f = fopen(context->path, "wb");
  int running = TRUE;
  
  do {
    result = gnome_vfs_read(handle, buffer, sizeof(buffer)-1, &bytes_read);
    if((result == GNOME_VFS_OK) && (bytes_read > 0)) {

      /* update local "running" variable from shared variable */
      if(running) {
        g_mutex_lock(context->mutex);
        running = context->active;
        g_mutex_unlock(context->mutex);
      }

      if(running) 
        gtk_html_write(GTK_HTML(context->view), 
                       context->stream, buffer, bytes_read);
      
      /* and also write local file */
      if(f) fwrite(buffer, 1l, bytes_read, f);
    }
  } while((result == GNOME_VFS_OK) && (bytes_read > 0) && running);
  
  if(f) fclose(f);

  gnome_vfs_close(handle);

  /* this file is likely incomplete, remove it */
  if(!running) {
    printf("%p: thread killed, removing imcomplete cached image\n", self);
    remove(context->path);
    release_load_context(self, context);
    return NULL;
  }

  printf("%p: loader thread successfully finished\n", self);
  release_load_context(self, context);
  return NULL;
}

static void on_request_url(GtkHTML *html, const gchar *url, 
                           GtkHTMLStream *stream, gpointer data) {
  char buffer[4096];
  GnomeVFSFileSize bytes_read;
  
  http_context_t *context = (http_context_t*)data;

  if(context->cache) {
    /* try to build local path */
    char *path = malloc(strlen(context->appdata->image_path)+
                        strlen(context->cache->id)+
                        14);  /* strlen("/xxxxxxxx.xxx\0") == 14 */

    strcpy(path, context->appdata->image_path);
    strcat(path, context->cache->id);
    sprintf(path+strlen(path), "/%lx", name_hash(url));

    /* only append extension if there's a useful one up to three chars ... */
    char *dot = strrchr(url, '.');
    if(dot) 
      if(strlen(dot) <= 4)
        strcat(path, dot);
    
    printf("cache name = %s\n", path);
    if(g_file_test(path, G_FILE_TEST_EXISTS)) {
      printf("image file exists!\n");
      
      FILE *f = fopen(path, "rb");
      
      while ((bytes_read = fread(buffer, 1, sizeof(buffer), f)) != 0) {

        gtk_html_write(GTK_HTML(context->view), 
                       stream, buffer, bytes_read);

        while (gtk_events_pending ())
          gtk_main_iteration ();
      }
      fclose(f);
      
    } else {
      printf("image file doesn't exist, starting extra thread!\n");
        
      checkdir(path); 
      
      /* walk to end of list */
      load_context_t **load_context = &(context->load_context);
      while(*load_context) 
        load_context = &(*load_context)->next;
      
      *load_context = g_new0(load_context_t, 1);
      
      (*load_context)->url = strdup(url);
      (*load_context)->path = strdup(path);
      (*load_context)->view = context->view;
      (*load_context)->stream = stream;
      (*load_context)->next = NULL;
      (*load_context)->active = TRUE;
      (*load_context)->mutex = g_mutex_new();
      
      g_thread_create(loader_thread, *load_context, TRUE, NULL);
      return;
    }
  } else {
    /* not a cache, maybe help, so load images from icon directory */

    /* try to build local path */
    char *path = malloc(strlen(ICONPATH)+strlen(url)+1);

    strcpy(path, ICONPATH);
    strcat(path, url);
    if(!g_file_test(path, G_FILE_TEST_EXISTS)) {
      strcpy(path, "./icons/");
      strcat(path, url);
    }

    if(g_file_test(path, G_FILE_TEST_EXISTS)) {
      FILE *f = fopen(path, "rb");
      
      while ((bytes_read = fread(buffer, 1, sizeof(buffer), f)) != 0) {
        gtk_html_write(GTK_HTML(context->view), 
                       stream, buffer, bytes_read);
        
        while (gtk_events_pending ())
          gtk_main_iteration ();
      }
      fclose(f);
    }
  }

  gtk_html_end(GTK_HTML(context->view), stream, GTK_HTML_STREAM_OK);
}

/* notify all open html views of zoom event */
void html_zoom(appdata_t *appdata, gboolean in) {
  struct html_view *html_view = appdata->html_view;

  while(html_view) {
    printf("zoom notify view %p\n", html_view->view);

    if(in) gtk_html_zoom_in(GTK_HTML(html_view->view));
    else   gtk_html_zoom_out(GTK_HTML(html_view->view));

    html_view = html_view->next;
  }
}

#ifndef NO_COPY_N_PASTE
static void on_destroy_textview(GtkWidget *widget, gpointer data) {
  appdata_t *appdata = (appdata_t*)data;
  int destroy_active = FALSE;

  /* only do this if main windows hasn't already been destroyed */
  if(!appdata->window) {
    printf("detroy_textview: main window is gone\n");
    return;
  }

  if(!appdata->active_buffer)
    printf("Destroy, but there was no active buffer!\n");
  else {
    if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
      printf("destroying textview\n");
      
      if(appdata->active_buffer == 
         gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget))) {
        printf("This was the active buffer\n");
        destroy_active = TRUE;
      }
    } else {
      if(widget == (GtkWidget*)appdata->active_buffer) {
        printf("This was the active html view\n");
        destroy_active = TRUE;
      }
    }
  }

  if(destroy_active) {
    appdata->active_buffer = NULL;

    gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
    gtk_widget_set_sensitive(appdata->menu_copy, FALSE);
    gtk_widget_set_sensitive(appdata->menu_paste, FALSE);
  }
}
#endif

static void on_destroy_htmlview(GtkWidget *widget, gpointer data) {
  http_context_t *context = (http_context_t*)data;

  printf("destroying html context\n");
  //  printf("associated view = %p\n", context->view);

  struct html_view **h = &(context->appdata->html_view);

  while(*h && (*h)->view != context->view) 
    h = &((*h)->next);

  g_assert(h);

  /* remove entry from chain */
  void *tmp = *h;
  *h = (*h)->next;
  free(tmp);

  load_context_t *load_context = context->load_context;
  while(load_context) {
    printf("found an associated thread\n");

    load_context_t *tmp_context = load_context->next;
    release_load_context(NULL, load_context);
    load_context = tmp_context;
  }

#ifndef NO_COPY_N_PASTE
  on_destroy_textview(widget, context->appdata);
#endif

  /* destroy context */
  free(data);
}

#ifndef NO_COPY_N_PASTE
static gboolean focus_in(GtkWidget *widget, GdkEventFocus *event,
                         gpointer data) {
  appdata_t *appdata = (appdata_t*)data;

  printf("focus in!\n");
 
  /* these buffers are read-only, thus only "copy" is enabled */
  gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
  gtk_widget_set_sensitive(appdata->menu_copy, TRUE);
  gtk_widget_set_sensitive(appdata->menu_paste, FALSE);

  if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
    appdata->active_buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget));
  } else if(GTK_WIDGET_TYPE(widget) == gtk_html_get_type()) {
    appdata->active_buffer = (GtkTextBuffer*)widget;
  } else {
    printf("not a text nor a html view\n");
  }

  return FALSE;
}

void html_copy_to_clipboard(appdata_t *appdata) {
  gtk_html_copy(GTK_HTML(appdata->active_buffer));
}
#endif

/* panning a gtkhtml view currently doesn't work well */
#define PANNABLE_HTML

#ifdef PANNABLE_HTML
/* eat the button events */
static gboolean on_button_press(GtkWidget *widget, GdkEventButton *event,
                                gpointer user_data) {
  return TRUE;
}
#endif

/* the cache descriptions are not valid html and need some surrounding stuff */
static const char *html_start = "<html><head>"
  "<meta http-equiv=content-type content=\"text/html; charset=UTF-8\">"
  "</head></body>";
static const char *html_end = "</body></html>";

GtkWidget *html_view(appdata_t *appdata, char *text, 
                     gboolean is_html, gboolean scrollwin,
                     cache_t *cache, char *anchor) {
  GtkWidget *view;

  if(is_html) {
    http_context_t *context = g_new0(http_context_t, 1);
    context->appdata = appdata;
    context->cache = cache;

    context->view = view = gtk_html_new();

    /* create a callback to load images only if a cache has been given */
    /* so that images can be cached/stored appropriately */
    g_signal_connect(G_OBJECT(view), "url_requested", 
                     G_CALLBACK(on_request_url), context);

    GtkHTMLStream *stream = gtk_html_begin(GTK_HTML(view));

    gtk_html_write(GTK_HTML(view), stream, html_start, strlen(html_start));
    gtk_html_write(GTK_HTML(view), stream, text, strlen(text));
    gtk_html_write(GTK_HTML(view), stream, html_end, strlen(html_end));
    gtk_html_end(GTK_HTML(view), stream, GTK_HTML_STREAM_OK);

    if(anchor) {
      while(gtk_events_pending())
        gtk_main_iteration ();

      gtk_html_jump_to_anchor(GTK_HTML(context->view), anchor);
    }

    /* register this html view */
    struct html_view **h = &(appdata->html_view);
    while(*h) h = &((*h)->next);
    *h = g_new0(struct html_view, 1);
    (*h)->view = view;

#ifdef PANNABLE_HTML
    /* this causes finger scrolling to work nicely but also prevents */
    /* copy'n paste from working correctly */
    gtk_widget_set_sensitive(GTK_WIDGET(view), FALSE);

    g_signal_connect(G_OBJECT(view), "button-press-event", 
                     G_CALLBACK(on_button_press), NULL);
#endif

    g_signal_connect(G_OBJECT(view), "destroy", 
                     G_CALLBACK(on_destroy_htmlview), context);
  } else {
    GtkTextBuffer *buffer = gtk_text_buffer_new(NULL);
    gtk_text_buffer_set_text(buffer, text, strlen(text));

#ifndef USE_HILDON_TEXT_VIEW
    view = gtk_text_view_new_with_buffer(buffer);
#else
    view = hildon_text_view_new();
    hildon_text_view_set_buffer(HILDON_TEXT_VIEW(view), buffer);
#endif

    gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(view), GTK_WRAP_WORD);
    gtk_text_view_set_editable(GTK_TEXT_VIEW(view), FALSE);
    gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(view), FALSE);

#ifndef NO_COPY_N_PASTE
    g_signal_connect(G_OBJECT(view), "destroy", 
                     G_CALLBACK(on_destroy_textview), appdata);
#endif
  } 
  
#ifndef NO_COPY_N_PASTE
  g_signal_connect(G_OBJECT(view), "focus-in-event", 
                   G_CALLBACK(focus_in), appdata);
#endif

  if(scrollwin) {
#ifndef USE_PANNABLE_AREA
    GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window), 
                     GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_container_add(GTK_CONTAINER(scrolled_window), view);

#if 1
    return scrolled_window;
#else
    GtkWidget *fixed = gtk_fixed_new();
    gtk_fixed_put(GTK_FIXED(fixed), scrolled_window, 0, 0);
    GtkWidget *tbutton = gtk_toggle_button_new_with_label("sel");
    gtk_fixed_put(GTK_FIXED(fixed), tbutton, 0, 0);
    return fixed;
#endif
#else
#ifndef PANNABLE_HTML
  if(is_html) { 
      GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
      gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window), 
                     GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
      gtk_container_add(GTK_CONTAINER(scrolled_window), view);
      return scrolled_window;
    } else
#endif
    {
      GtkWidget *pannable_area = hildon_pannable_area_new();
      gtk_container_add(GTK_CONTAINER(pannable_area), view);
      return pannable_area;    
    }
#endif
  }

  return view;
}

1	/*
2	* Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
3	*
4	* This file is part of GPXView.
5	*
6	* GPXView is free software: you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation, either version 3 of the License, or
9	* (at your option) any later version.
10	*
11	* GPXView is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with GPXView. If not, see <http://www.gnu.org/licenses/>.
18	*/
19
20	#include "gpxview.h"
21
22	typedef struct load_context {
23	int active;
24	GMutex *mutex;
25	GtkWidget *view;
26	char url, path;
27	GtkHTMLStream *stream;
28	struct load_context *next;
29	} load_context_t;
30
31	typedef struct {
32	appdata_t *appdata;
33	cache_t *cache;
34	GtkWidget *view;
35	load_context_t *load_context;
36	} http_context_t;
37
38	static unsigned long name_hash(const char *name) {
39	unsigned long val = 0;
40
41	while(*name) {
42	val = (val<<8) ^ (val >> 24) ^ (*name & 0xff);
43	name++;
44	}
45
46	return val;
47	}
48
49	void release_load_context(GThread self, load_context_t context) {
50	/* this must be atomar, so acquire a lock */
51
52	printf("%p: freeing context at %p\n", self, context);
53
54	g_mutex_lock(context->mutex);
55
56	/* don't do much if the other thread still uses this */
57	if(context->active) {
58	printf(" still active -> just close link\n");
59
60	/* close link to view as the thread is either done or */
61	/* main wants to close the view */
62	gtk_html_end(GTK_HTML(context->view), context->stream,
63	GTK_HTML_STREAM_OK);
64
65	context->active = FALSE;
66	g_mutex_unlock(context->mutex);
67	return;
68	}
69
70	/* ok, other thread is also gone -> we can destroy everything */
71	printf(" not active -> destroy\n");
72
73	/* just free everything */
74	g_mutex_unlock(context->mutex);
75	free(context->url);
76	free(context->path);
77	free(context);
78	}
79
80	gpointer loader_thread(gpointer data) {
81	GThread *self = g_thread_self();
82
83	GnomeVFSResult result;
84	GnomeVFSHandle *handle;
85	char buffer[4096];
86	GnomeVFSFileSize bytes_read;
87
88	load_context_t context = (load_context_t)data;
89
90	printf("%p: loader thread for %s running\n", self, context->url);
91
92	result = gnome_vfs_open(&handle, context->url, GNOME_VFS_OPEN_READ);
93	if(result != GNOME_VFS_OK) {
94	g_print("%p: open error: %s\n", self, gnome_vfs_result_to_string(result));
95
96	release_load_context(self, context);
97	return NULL;
98	}
99
100	/* try to open file for writing */
101	FILE *f = fopen(context->path, "wb");
102	int running = TRUE;
103
104	do {
105	result = gnome_vfs_read(handle, buffer, sizeof(buffer)-1, &bytes_read);
106	if((result == GNOME_VFS_OK) && (bytes_read > 0)) {
107
108	/* update local "running" variable from shared variable */
109	if(running) {
110	g_mutex_lock(context->mutex);
111	running = context->active;
112	g_mutex_unlock(context->mutex);
113	}
114
115	if(running)
116	gtk_html_write(GTK_HTML(context->view),
117	context->stream, buffer, bytes_read);
118
119	/* and also write local file */
120	if(f) fwrite(buffer, 1l, bytes_read, f);
121	}
122	} while((result == GNOME_VFS_OK) && (bytes_read > 0) && running);
123
124	if(f) fclose(f);
125
126	gnome_vfs_close(handle);
127
128	/* this file is likely incomplete, remove it */
129	if(!running) {
130	printf("%p: thread killed, removing imcomplete cached image\n", self);
131	remove(context->path);
132	release_load_context(self, context);
133	return NULL;
134	}
135
136	printf("%p: loader thread successfully finished\n", self);
137	release_load_context(self, context);
138	return NULL;
139	}
140
141	static void on_request_url(GtkHTML html, const gchar url,
142	GtkHTMLStream *stream, gpointer data) {
143	char buffer[4096];
144	GnomeVFSFileSize bytes_read;
145
146	http_context_t context = (http_context_t)data;
147
148	if(context->cache) {
149	/* try to build local path */
150	char *path = malloc(strlen(context->appdata->image_path)+
151	strlen(context->cache->id)+
152	14); /* strlen("/xxxxxxxx.xxx\0") == 14 */
153
154	strcpy(path, context->appdata->image_path);
155	strcat(path, context->cache->id);
156	sprintf(path+strlen(path), "/%lx", name_hash(url));
157
158	/* only append extension if there's a useful one up to three chars ... */
159	char *dot = strrchr(url, '.');
160	if(dot)
161	if(strlen(dot) <= 4)
162	strcat(path, dot);
163
164	printf("cache name = %s\n", path);
165	if(g_file_test(path, G_FILE_TEST_EXISTS)) {
166	printf("image file exists!\n");
167
168	FILE *f = fopen(path, "rb");
169
170	while ((bytes_read = fread(buffer, 1, sizeof(buffer), f)) != 0) {
171
172	gtk_html_write(GTK_HTML(context->view),
173	stream, buffer, bytes_read);
174
175	while (gtk_events_pending ())
176	gtk_main_iteration ();
177	}
178	fclose(f);
179
180	} else {
181	printf("image file doesn't exist, starting extra thread!\n");
182
183	checkdir(path);
184
185	/* walk to end of list */
186	load_context_t **load_context = &(context->load_context);
187	while(*load_context)
188	load_context = &(*load_context)->next;
189
190	*load_context = g_new0(load_context_t, 1);
191
192	(*load_context)->url = strdup(url);
193	(*load_context)->path = strdup(path);
194	(*load_context)->view = context->view;
195	(*load_context)->stream = stream;
196	(*load_context)->next = NULL;
197	(*load_context)->active = TRUE;
198	(*load_context)->mutex = g_mutex_new();
199
200	g_thread_create(loader_thread, *load_context, TRUE, NULL);
201	return;
202	}
203	} else {
204	/* not a cache, maybe help, so load images from icon directory */
205
206	/* try to build local path */
207	char *path = malloc(strlen(ICONPATH)+strlen(url)+1);
208
209	strcpy(path, ICONPATH);
210	strcat(path, url);
211	if(!g_file_test(path, G_FILE_TEST_EXISTS)) {
212	strcpy(path, "./icons/");
213	strcat(path, url);
214	}
215
216	if(g_file_test(path, G_FILE_TEST_EXISTS)) {
217	FILE *f = fopen(path, "rb");
218
219	while ((bytes_read = fread(buffer, 1, sizeof(buffer), f)) != 0) {
220	gtk_html_write(GTK_HTML(context->view),
221	stream, buffer, bytes_read);
222
223	while (gtk_events_pending ())
224	gtk_main_iteration ();
225	}
226	fclose(f);
227	}
228	}
229
230	gtk_html_end(GTK_HTML(context->view), stream, GTK_HTML_STREAM_OK);
231	}
232
233	/* notify all open html views of zoom event */
234	void html_zoom(appdata_t *appdata, gboolean in) {
235	struct html_view *html_view = appdata->html_view;
236
237	while(html_view) {
238	printf("zoom notify view %p\n", html_view->view);
239
240	if(in) gtk_html_zoom_in(GTK_HTML(html_view->view));
241	else gtk_html_zoom_out(GTK_HTML(html_view->view));
242
243	html_view = html_view->next;
244	}
245	}
246
247	#ifndef NO_COPY_N_PASTE
248	static void on_destroy_textview(GtkWidget *widget, gpointer data) {
249	appdata_t appdata = (appdata_t)data;
250	int destroy_active = FALSE;
251
252	/* only do this if main windows hasn't already been destroyed */
253	if(!appdata->window) {
254	printf("detroy_textview: main window is gone\n");
255	return;
256	}
257
258	if(!appdata->active_buffer)
259	printf("Destroy, but there was no active buffer!\n");
260	else {
261	if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
262	printf("destroying textview\n");
263
264	if(appdata->active_buffer ==
265	gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget))) {
266	printf("This was the active buffer\n");
267	destroy_active = TRUE;
268	}
269	} else {
270	if(widget == (GtkWidget*)appdata->active_buffer) {
271	printf("This was the active html view\n");
272	destroy_active = TRUE;
273	}
274	}
275	}
276
277	if(destroy_active) {
278	appdata->active_buffer = NULL;
279
280	gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
281	gtk_widget_set_sensitive(appdata->menu_copy, FALSE);
282	gtk_widget_set_sensitive(appdata->menu_paste, FALSE);
283	}
284	}
285	#endif
286
287	static void on_destroy_htmlview(GtkWidget *widget, gpointer data) {
288	http_context_t context = (http_context_t)data;
289
290	printf("destroying html context\n");
291	// printf("associated view = %p\n", context->view);
292
293	struct html_view **h = &(context->appdata->html_view);
294
295	while(h && (h)->view != context->view)
296	h = &((*h)->next);
297
298	g_assert(h);
299
300	/* remove entry from chain */
301	void tmp = h;
302	h = (h)->next;
303	free(tmp);
304
305	load_context_t *load_context = context->load_context;
306	while(load_context) {
307	printf("found an associated thread\n");
308
309	load_context_t *tmp_context = load_context->next;
310	release_load_context(NULL, load_context);
311	load_context = tmp_context;
312	}
313
314	#ifndef NO_COPY_N_PASTE
315	on_destroy_textview(widget, context->appdata);
316	#endif
317
318	/* destroy context */
319	free(data);
320	}
321
322	#ifndef NO_COPY_N_PASTE
323	static gboolean focus_in(GtkWidget widget, GdkEventFocus event,
324	gpointer data) {
325	appdata_t appdata = (appdata_t)data;
326
327	printf("focus in!\n");
328
329	/* these buffers are read-only, thus only "copy" is enabled */
330	gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
331	gtk_widget_set_sensitive(appdata->menu_copy, TRUE);
332	gtk_widget_set_sensitive(appdata->menu_paste, FALSE);
333
334	if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
335	appdata->active_buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget));
336	} else if(GTK_WIDGET_TYPE(widget) == gtk_html_get_type()) {
337	appdata->active_buffer = (GtkTextBuffer*)widget;
338	} else {
339	printf("not a text nor a html view\n");
340	}
341
342	return FALSE;
343	}
344
345	void html_copy_to_clipboard(appdata_t *appdata) {
346	gtk_html_copy(GTK_HTML(appdata->active_buffer));
347	}
348	#endif
349
350	/* panning a gtkhtml view currently doesn't work well */
351	#define PANNABLE_HTML
352
353	#ifdef PANNABLE_HTML
354	/* eat the button events */
355	static gboolean on_button_press(GtkWidget widget, GdkEventButton event,
356	gpointer user_data) {
357	return TRUE;
358	}
359	#endif
360
361	/* the cache descriptions are not valid html and need some surrounding stuff */
362	static const char *html_start = "<html><head>"
363	"<meta http-equiv=content-type content=\"text/html; charset=UTF-8\">"
364	"</head></body>";
365	static const char *html_end = "</body></html>";
366
367	GtkWidget html_view(appdata_t appdata, char *text,
368	gboolean is_html, gboolean scrollwin,
369	cache_t cache, char anchor) {
370	GtkWidget *view;
371
372	if(is_html) {
373	http_context_t *context = g_new0(http_context_t, 1);
374	context->appdata = appdata;
375	context->cache = cache;
376
377	context->view = view = gtk_html_new();
378
379	/* create a callback to load images only if a cache has been given */
380	/* so that images can be cached/stored appropriately */
381	g_signal_connect(G_OBJECT(view), "url_requested",
382	G_CALLBACK(on_request_url), context);
383
384	GtkHTMLStream *stream = gtk_html_begin(GTK_HTML(view));
385
386	gtk_html_write(GTK_HTML(view), stream, html_start, strlen(html_start));
387	gtk_html_write(GTK_HTML(view), stream, text, strlen(text));
388	gtk_html_write(GTK_HTML(view), stream, html_end, strlen(html_end));
389	gtk_html_end(GTK_HTML(view), stream, GTK_HTML_STREAM_OK);
390
391	if(anchor) {
392	while(gtk_events_pending())
393	gtk_main_iteration ();
394
395	gtk_html_jump_to_anchor(GTK_HTML(context->view), anchor);
396	}
397
398	/* register this html view */
399	struct html_view **h = &(appdata->html_view);
400	while(h) h = &((h)->next);
401	*h = g_new0(struct html_view, 1);
402	(*h)->view = view;
403
404	#ifdef PANNABLE_HTML
405	/* this causes finger scrolling to work nicely but also prevents */
406	/* copy'n paste from working correctly */
407	gtk_widget_set_sensitive(GTK_WIDGET(view), FALSE);
408
409	g_signal_connect(G_OBJECT(view), "button-press-event",
410	G_CALLBACK(on_button_press), NULL);
411	#endif
412
413	g_signal_connect(G_OBJECT(view), "destroy",
414	G_CALLBACK(on_destroy_htmlview), context);
415	} else {
416	GtkTextBuffer *buffer = gtk_text_buffer_new(NULL);
417	gtk_text_buffer_set_text(buffer, text, strlen(text));
418
419	#ifndef USE_HILDON_TEXT_VIEW
420	view = gtk_text_view_new_with_buffer(buffer);
421	#else
422	view = hildon_text_view_new();
423	hildon_text_view_set_buffer(HILDON_TEXT_VIEW(view), buffer);
424	#endif
425
426	gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(view), GTK_WRAP_WORD);
427	gtk_text_view_set_editable(GTK_TEXT_VIEW(view), FALSE);
428	gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(view), FALSE);
429
430	#ifndef NO_COPY_N_PASTE
431	g_signal_connect(G_OBJECT(view), "destroy",
432	G_CALLBACK(on_destroy_textview), appdata);
433	#endif
434	}
435
436	#ifndef NO_COPY_N_PASTE
437	g_signal_connect(G_OBJECT(view), "focus-in-event",
438	G_CALLBACK(focus_in), appdata);
439	#endif
440
441	if(scrollwin) {
442	#ifndef USE_PANNABLE_AREA
443	GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
444	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window),
445	GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
446	gtk_container_add(GTK_CONTAINER(scrolled_window), view);
447
448	#if 1
449	return scrolled_window;
450	#else
451	GtkWidget *fixed = gtk_fixed_new();
452	gtk_fixed_put(GTK_FIXED(fixed), scrolled_window, 0, 0);
453	GtkWidget *tbutton = gtk_toggle_button_new_with_label("sel");
454	gtk_fixed_put(GTK_FIXED(fixed), tbutton, 0, 0);
455	return fixed;
456	#endif
457	#else
458	#ifndef PANNABLE_HTML
459	if(is_html) {
460	GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
461	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window),
462	GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
463	gtk_container_add(GTK_CONTAINER(scrolled_window), view);
464	return scrolled_window;
465	} else
466	#endif
467	{
468	GtkWidget *pannable_area = hildon_pannable_area_new();
469	gtk_container_add(GTK_CONTAINER(pannable_area), view);
470	return pannable_area;
471	}
472	#endif
473	}
474
475	return view;
476	}
477