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 {
      if(context->appdata->load_images) {
        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
        g_print("Image loading disabled\n");
    }
  } 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;
  }
}

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);
  }
}

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;
  }

  on_destroy_textview(widget, context->appdata);

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

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));
}

/* panning a gtkhtml view currently doesn't work well */
#undef 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_MAEMO    
    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);

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

  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	harbaum	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			if(context->appdata->load_images) {
182			printf("image file doesn't exist, starting extra thread!\n");
183
184			checkdir(path);
185
186			/* walk to end of list */
187			load_context_t **load_context = &(context->load_context);
188			while(*load_context)
189			load_context = &(*load_context)->next;
190
191			*load_context = g_new0(load_context_t, 1);
192
193			(*load_context)->url = strdup(url);
194			(*load_context)->path = strdup(path);
195			(*load_context)->view = context->view;
196			(*load_context)->stream = stream;
197			(*load_context)->next = NULL;
198			(*load_context)->active = TRUE;
199			(*load_context)->mutex = g_mutex_new();
200
201			g_thread_create(loader_thread, *load_context, TRUE, NULL);
202			return;
203			} else
204			g_print("Image loading disabled\n");
205			}
206			} else {
207			/* not a cache, maybe help, so load images from icon directory */
208
209			/* try to build local path */
210			char *path = malloc(strlen(ICONPATH)+strlen(url)+1);
211
212			strcpy(path, ICONPATH);
213			strcat(path, url);
214			if(!g_file_test(path, G_FILE_TEST_EXISTS)) {
215			strcpy(path, "./icons/");
216			strcat(path, url);
217			}
218
219			if(g_file_test(path, G_FILE_TEST_EXISTS)) {
220			FILE *f = fopen(path, "rb");
221
222			while ((bytes_read = fread(buffer, 1, sizeof(buffer), f)) != 0) {
223			gtk_html_write(GTK_HTML(context->view),
224			stream, buffer, bytes_read);
225
226			while (gtk_events_pending ())
227			gtk_main_iteration ();
228			}
229			fclose(f);
230			}
231			}
232
233			gtk_html_end(GTK_HTML(context->view), stream, GTK_HTML_STREAM_OK);
234			}
235
236			/* notify all open html views of zoom event */
237			void html_zoom(appdata_t *appdata, gboolean in) {
238			struct html_view *html_view = appdata->html_view;
239
240			while(html_view) {
241			printf("zoom notify view %p\n", html_view->view);
242
243			if(in) gtk_html_zoom_in(GTK_HTML(html_view->view));
244			else gtk_html_zoom_out(GTK_HTML(html_view->view));
245
246			html_view = html_view->next;
247			}
248			}
249
250			static void on_destroy_textview(GtkWidget *widget, gpointer data) {
251			appdata_t appdata = (appdata_t)data;
252			int destroy_active = FALSE;
253
254			/* only do this if main windows hasn't already been destroyed */
255			if(!appdata->window) {
256			printf("detroy_textview: main window is gone\n");
257			return;
258			}
259
260			if(!appdata->active_buffer)
261			printf("Destroy, but there was no active buffer!\n");
262			else {
263			if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
264			printf("destroying textview\n");
265
266			if(appdata->active_buffer ==
267			gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget))) {
268			printf("This was the active buffer\n");
269			destroy_active = TRUE;
270			}
271			} else {
272			if(widget == (GtkWidget*)appdata->active_buffer) {
273			printf("This was the active html view\n");
274			destroy_active = TRUE;
275			}
276			}
277			}
278
279			if(destroy_active) {
280			appdata->active_buffer = NULL;
281
282			gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
283			gtk_widget_set_sensitive(appdata->menu_copy, FALSE);
284			gtk_widget_set_sensitive(appdata->menu_paste, FALSE);
285			}
286			}
287
288			static void on_destroy_htmlview(GtkWidget *widget, gpointer data) {
289			http_context_t context = (http_context_t)data;
290
291			printf("destroying html context\n");
292			// printf("associated view = %p\n", context->view);
293
294			struct html_view **h = &(context->appdata->html_view);
295
296			while(h && (h)->view != context->view)
297			h = &((*h)->next);
298
299			g_assert(h);
300
301			/* remove entry from chain */
302			void tmp = h;
303			h = (h)->next;
304			free(tmp);
305
306			load_context_t *load_context = context->load_context;
307			while(load_context) {
308			printf("found an associated thread\n");
309
310			load_context_t *tmp_context = load_context->next;
311			release_load_context(NULL, load_context);
312			load_context = tmp_context;
313			}
314
315			on_destroy_textview(widget, context->appdata);
316
317			/* destroy context */
318			free(data);
319			}
320
321			static gboolean focus_in(GtkWidget widget, GdkEventFocus event,
322			gpointer data) {
323			appdata_t appdata = (appdata_t)data;
324
325			printf("focus in!\n");
326
327			/* these buffers are read-only, thus only "copy" is enabled */
328			gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
329			gtk_widget_set_sensitive(appdata->menu_copy, TRUE);
330			gtk_widget_set_sensitive(appdata->menu_paste, FALSE);
331
332			if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
333			appdata->active_buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget));
334			} else if(GTK_WIDGET_TYPE(widget) == gtk_html_get_type()) {
335			appdata->active_buffer = (GtkTextBuffer*)widget;
336			} else {
337			printf("not a text nor a html view\n");
338			}
339
340			return FALSE;
341			}
342
343			void html_copy_to_clipboard(appdata_t *appdata) {
344			gtk_html_copy(GTK_HTML(appdata->active_buffer));
345			}
346
347			/* panning a gtkhtml view currently doesn't work well */
348			#undef PANNABLE_HTML
349
350			#ifdef PANNABLE_HTML
351			/* eat the button events */
352			static gboolean on_button_press(GtkWidget widget, GdkEventButton event,
353			gpointer user_data) {
354			return TRUE;
355			}
356			#endif
357
358			/* the cache descriptions are not valid html and need some surrounding stuff */
359			static const char *html_start = "<html><head>"
360			"<meta http-equiv=content-type content=\"text/html; charset=UTF-8\">"
361			"</head></body>";
362			static const char *html_end = "</body></html>";
363
364			GtkWidget html_view(appdata_t appdata, char *text,
365			gboolean is_html, gboolean scrollwin,
366			cache_t cache, char anchor) {
367			GtkWidget *view;
368
369			if(is_html) {
370			http_context_t *context = g_new0(http_context_t, 1);
371			context->appdata = appdata;
372			context->cache = cache;
373
374			context->view = view = gtk_html_new();
375
376			/* create a callback to load images only if a cache has been given */
377			/* so that images can be cached/stored appropriately */
378			g_signal_connect(G_OBJECT(view), "url_requested",
379			G_CALLBACK(on_request_url), context);
380
381			GtkHTMLStream *stream = gtk_html_begin(GTK_HTML(view));
382
383			gtk_html_write(GTK_HTML(view), stream, html_start, strlen(html_start));
384			gtk_html_write(GTK_HTML(view), stream, text, strlen(text));
385			gtk_html_write(GTK_HTML(view), stream, html_end, strlen(html_end));
386			gtk_html_end(GTK_HTML(view), stream, GTK_HTML_STREAM_OK);
387
388			if(anchor) {
389			while(gtk_events_pending())
390			gtk_main_iteration ();
391
392			gtk_html_jump_to_anchor(GTK_HTML(context->view), anchor);
393			}
394
395			/* register this html view */
396			struct html_view **h = &(appdata->html_view);
397			while(h) h = &((h)->next);
398			*h = g_new0(struct html_view, 1);
399			(*h)->view = view;
400
401			#ifdef PANNABLE_HTML
402			/* this causes finger scrolling to work nicely but also prevents */
403			/* copy'n paste from working correctly */
404			gtk_widget_set_sensitive(GTK_WIDGET(view), FALSE);
405
406			g_signal_connect(G_OBJECT(view), "button-press-event",
407			G_CALLBACK(on_button_press), NULL);
408			#endif
409
410			g_signal_connect(G_OBJECT(view), "destroy",
411			G_CALLBACK(on_destroy_htmlview), context);
412			} else {
413			GtkTextBuffer *buffer = gtk_text_buffer_new(NULL);
414			gtk_text_buffer_set_text(buffer, text, strlen(text));
415
416			#ifndef USE_MAEMO
417			view = gtk_text_view_new_with_buffer(buffer);
418			#else
419			view = hildon_text_view_new();
420			hildon_text_view_set_buffer(HILDON_TEXT_VIEW(view), buffer);
421			#endif
422
423			gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(view), GTK_WRAP_WORD);
424			gtk_text_view_set_editable(GTK_TEXT_VIEW(view), FALSE);
425			gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(view), FALSE);
426
427			g_signal_connect(G_OBJECT(view), "destroy",
428			G_CALLBACK(on_destroy_textview), appdata);
429			}
430
431			g_signal_connect(G_OBJECT(view), "focus-in-event",
432			G_CALLBACK(focus_in), appdata);
433
434			if(scrollwin) {
435			#ifndef USE_PANNABLE_AREA
436			GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
437			gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window),
438			GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
439			gtk_container_add(GTK_CONTAINER(scrolled_window), view);
440
441			#if 1
442			return scrolled_window;
443			#else
444			GtkWidget *fixed = gtk_fixed_new();
445			gtk_fixed_put(GTK_FIXED(fixed), scrolled_window, 0, 0);
446			GtkWidget *tbutton = gtk_toggle_button_new_with_label("sel");
447			gtk_fixed_put(GTK_FIXED(fixed), tbutton, 0, 0);
448			return fixed;
449			#endif
450			#else
451			#ifndef PANNABLE_HTML
452			if(is_html) {
453			GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
454			gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window),
455			GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
456			gtk_container_add(GTK_CONTAINER(scrolled_window), view);
457			return scrolled_window;
458			} else
459			#endif
460			{
461			GtkWidget *pannable_area = hildon_pannable_area_new();
462			gtk_container_add(GTK_CONTAINER(pannable_area), view);
463			return pannable_area;
464			}
465			#endif
466			}
467
468			return view;
469			}
470