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"

// #undef PANNABLE_HTML

#ifdef FREMANTLE
#include <hildon/hildon-banner.h>
#include <hildon/hildon-note.h>
#endif

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;
}

#ifdef ENABLE_BROWSER_INTERFACE
static void on_link_clicked(GtkHTML *html, const gchar *url, 
                            gpointer data) {

  appdata_t *appdata = (appdata_t*)data;

#if !defined(USE_MAEMO) || (MAEMO_VERSION_MAJOR < 5)
  GtkWidget *dialog = gtk_message_dialog_new(
                           GTK_WINDOW(appdata->window),
                           GTK_DIALOG_DESTROY_WITH_PARENT,
                           GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO, 
                           _("Open link on external browser?"));
  gboolean yes = (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_YES);
#else
  GtkWidget *dialog = 
    hildon_note_new_confirmation(GTK_WINDOW(appdata->window), 
                                _("Open link in external browser?"));
  gboolean yes = (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_OK);
#endif
  
  gtk_widget_destroy(dialog);

  if(yes)
    browser_url(appdata, (char*)url);
}
#endif

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

#ifdef FREMANTLE
static void
tap_and_hold_cb (GtkWidget *widget, gpointer user_data) {
  appdata_t *appdata = (appdata_t*)user_data;

  /* the HildonTextView becomes semi-copy'n pasteable if we enable */
  /* the cursor */
  if(GTK_WIDGET_TYPE(widget) == HILDON_TYPE_TEXT_VIEW) {
    gboolean state = gtk_text_view_get_cursor_visible(GTK_TEXT_VIEW(widget));
    gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(widget), !state);
    return;
  }

#if 0
  GtkWidget *parent = widget->parent;

  /* check if the parent actually is a hildonpannablearea */
  if(GTK_WIDGET_TYPE(parent) != HILDON_TYPE_PANNABLE_AREA) {
    printf("parent is not pannable area, ignoring event\n");
    return;
  }

  gboolean enabled = FALSE;
  g_object_get(parent, "enabled", &enabled, NULL);
  enabled = !enabled;
  g_object_set(parent, "enabled", enabled, NULL);  

  hildon_banner_show_information(GTK_WIDGET(appdata->window), 
                                 NULL, enabled?"enabled":"disabled");
#endif
}
#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, 
                     html_mode_t mode, gboolean scrollwin,
                     cache_t *cache, char *anchor) {
  GtkWidget *view;

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

    context->view = view = gtk_html_new();

#ifndef PANNABLE_HTML
    //    gtk_html_set_auto_panning(GTK_HTML(view), TRUE);
#else
    gtk_html_set_auto_panning(GTK_HTML(view), FALSE);
#endif

#ifdef FREMANTLE
    /* allow selection does not allow anything, but disables auto panning ... */
    /* even worse: frequently causes the device to reboot */
    //    gtk_html_allow_selection(GTK_HTML(view), TRUE);    
#endif

    /* 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);

#ifdef ENABLE_BROWSER_INTERFACE
    g_signal_connect(G_OBJECT(view), "link_clicked", 
                     G_CALLBACK(on_link_clicked), context->appdata);
#endif

    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 FREMANTLE
    gtk_widget_tap_and_hold_setup(GTK_WIDGET(view), NULL, NULL, 0);
    g_signal_connect(G_OBJECT(view), "tap-and-hold", 
                     G_CALLBACK(tap_and_hold_cb), appdata);
#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);

    gtk_widget_tap_and_hold_setup(GTK_WIDGET(view), NULL, NULL, 0);
    g_signal_connect(G_OBJECT(view), "tap-and-hold", 
                     G_CALLBACK(tap_and_hold_cb), appdata);
#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);

    /* make this look nicer in fremantle and not just black-on-white */
    /* just use the default style */
#ifdef USE_STACKABLE_WINDOW
    /* in fremantle this is really tricky and we need to inherit the */
    /* style from the topmost window in the stack */
    HildonWindowStack *stack = hildon_window_stack_get_default();
    GList *list = hildon_window_stack_get_windows(stack);
    gtk_widget_set_style(view, GTK_WIDGET(list->data)->style);
    g_list_free(list);
#else
    gtk_widget_set_style(view, GTK_WIDGET(appdata->window)->style);
#endif

#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);

    return scrolled_window;
#else
#ifndef PANNABLE_HTML
  if(mode == HTML_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	// #undef PANNABLE_HTML
23
24	#ifdef FREMANTLE
25	#include <hildon/hildon-banner.h>
26	#include <hildon/hildon-note.h>
27	#endif
28
29	typedef struct load_context {
30	int active;
31	GMutex *mutex;
32	GtkWidget *view;
33	char url, path;
34	GtkHTMLStream *stream;
35	struct load_context *next;
36	} load_context_t;
37
38	typedef struct {
39	appdata_t *appdata;
40	cache_t *cache;
41	GtkWidget *view;
42	load_context_t *load_context;
43	} http_context_t;
44
45	static unsigned long name_hash(const char *name) {
46	unsigned long val = 0;
47
48	while(*name) {
49	val = (val<<8) ^ (val >> 24) ^ (*name & 0xff);
50	name++;
51	}
52
53	return val;
54	}
55
56	void release_load_context(GThread self, load_context_t context) {
57	/* this must be atomar, so acquire a lock */
58
59	printf("%p: freeing context at %p\n", self, context);
60
61	g_mutex_lock(context->mutex);
62
63	/* don't do much if the other thread still uses this */
64	if(context->active) {
65	printf(" still active -> just close link\n");
66
67	/* close link to view as the thread is either done or */
68	/* main wants to close the view */
69	gtk_html_end(GTK_HTML(context->view), context->stream,
70	GTK_HTML_STREAM_OK);
71
72	context->active = FALSE;
73	g_mutex_unlock(context->mutex);
74	return;
75	}
76
77	/* ok, other thread is also gone -> we can destroy everything */
78	printf(" not active -> destroy\n");
79
80	/* just free everything */
81	g_mutex_unlock(context->mutex);
82	free(context->url);
83	free(context->path);
84	free(context);
85	}
86
87	gpointer loader_thread(gpointer data) {
88	GThread *self = g_thread_self();
89
90	GnomeVFSResult result;
91	GnomeVFSHandle *handle;
92	char buffer[4096];
93	GnomeVFSFileSize bytes_read;
94
95	load_context_t context = (load_context_t)data;
96
97	printf("%p: loader thread for %s running\n", self, context->url);
98
99	result = gnome_vfs_open(&handle, context->url, GNOME_VFS_OPEN_READ);
100	if(result != GNOME_VFS_OK) {
101	g_print("%p: open error: %s\n", self, gnome_vfs_result_to_string(result));
102
103	release_load_context(self, context);
104	return NULL;
105	}
106
107	/* try to open file for writing */
108	FILE *f = fopen(context->path, "wb");
109	int running = TRUE;
110
111	do {
112	result = gnome_vfs_read(handle, buffer, sizeof(buffer)-1, &bytes_read);
113	if((result == GNOME_VFS_OK) && (bytes_read > 0)) {
114
115	/* update local "running" variable from shared variable */
116	if(running) {
117	g_mutex_lock(context->mutex);
118	running = context->active;
119	g_mutex_unlock(context->mutex);
120	}
121
122	if(running)
123	gtk_html_write(GTK_HTML(context->view),
124	context->stream, buffer, bytes_read);
125
126	/* and also write local file */
127	if(f) fwrite(buffer, 1l, bytes_read, f);
128	}
129	} while((result == GNOME_VFS_OK) && (bytes_read > 0) && running);
130
131	if(f) fclose(f);
132
133	gnome_vfs_close(handle);
134
135	/* this file is likely incomplete, remove it */
136	if(!running) {
137	printf("%p: thread killed, removing imcomplete cached image\n", self);
138	remove(context->path);
139	release_load_context(self, context);
140	return NULL;
141	}
142
143	printf("%p: loader thread successfully finished\n", self);
144	release_load_context(self, context);
145	return NULL;
146	}
147
148	#ifdef ENABLE_BROWSER_INTERFACE
149	static void on_link_clicked(GtkHTML html, const gchar url,
150	gpointer data) {
151
152	appdata_t appdata = (appdata_t)data;
153
154	#if !defined(USE_MAEMO) \|\| (MAEMO_VERSION_MAJOR < 5)
155	GtkWidget *dialog = gtk_message_dialog_new(
156	GTK_WINDOW(appdata->window),
157	GTK_DIALOG_DESTROY_WITH_PARENT,
158	GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
159	_("Open link on external browser?"));
160	gboolean yes = (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_YES);
161	#else
162	GtkWidget *dialog =
163	hildon_note_new_confirmation(GTK_WINDOW(appdata->window),
164	_("Open link in external browser?"));
165	gboolean yes = (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_OK);
166	#endif
167
168	gtk_widget_destroy(dialog);
169
170	if(yes)
171	browser_url(appdata, (char*)url);
172	}
173	#endif
174
175	static void on_request_url(GtkHTML html, const gchar url,
176	GtkHTMLStream *stream, gpointer data) {
177	char buffer[4096];
178	GnomeVFSFileSize bytes_read;
179
180	http_context_t context = (http_context_t)data;
181
182	if(context->cache) {
183	/* try to build local path */
184	char *path = malloc(strlen(context->appdata->image_path)+
185	strlen(context->cache->id)+
186	14); /* strlen("/xxxxxxxx.xxx\0") == 14 */
187
188	strcpy(path, context->appdata->image_path);
189	strcat(path, context->cache->id);
190	sprintf(path+strlen(path), "/%lx", name_hash(url));
191
192	/* only append extension if there's a useful one up to three chars ... */
193	char *dot = strrchr(url, '.');
194	if(dot)
195	if(strlen(dot) <= 4)
196	strcat(path, dot);
197
198	printf("cache name = %s\n", path);
199	if(g_file_test(path, G_FILE_TEST_EXISTS)) {
200	printf("image file exists!\n");
201
202	FILE *f = fopen(path, "rb");
203
204	while ((bytes_read = fread(buffer, 1, sizeof(buffer), f)) != 0) {
205
206	gtk_html_write(GTK_HTML(context->view),
207	stream, buffer, bytes_read);
208
209	while (gtk_events_pending ())
210	gtk_main_iteration ();
211	}
212	fclose(f);
213
214	} else {
215	printf("image file doesn't exist, starting extra thread!\n");
216
217	checkdir(path);
218
219	/* walk to end of list */
220	load_context_t **load_context = &(context->load_context);
221	while(*load_context)
222	load_context = &(*load_context)->next;
223
224	*load_context = g_new0(load_context_t, 1);
225
226	(*load_context)->url = strdup(url);
227	(*load_context)->path = strdup(path);
228	(*load_context)->view = context->view;
229	(*load_context)->stream = stream;
230	(*load_context)->next = NULL;
231	(*load_context)->active = TRUE;
232	(*load_context)->mutex = g_mutex_new();
233
234	g_thread_create(loader_thread, *load_context, TRUE, NULL);
235	return;
236	}
237	} else {
238	/* not a cache, maybe help, so load images from icon directory */
239
240	/* try to build local path */
241	char *path = malloc(strlen(ICONPATH)+strlen(url)+1);
242
243	strcpy(path, ICONPATH);
244	strcat(path, url);
245	if(!g_file_test(path, G_FILE_TEST_EXISTS)) {
246	strcpy(path, "./icons/");
247	strcat(path, url);
248	}
249
250	if(g_file_test(path, G_FILE_TEST_EXISTS)) {
251	FILE *f = fopen(path, "rb");
252
253	while ((bytes_read = fread(buffer, 1, sizeof(buffer), f)) != 0) {
254	gtk_html_write(GTK_HTML(context->view),
255	stream, buffer, bytes_read);
256
257	while (gtk_events_pending ())
258	gtk_main_iteration ();
259	}
260	fclose(f);
261	}
262	}
263
264	gtk_html_end(GTK_HTML(context->view), stream, GTK_HTML_STREAM_OK);
265	}
266
267	/* notify all open html views of zoom event */
268	void html_zoom(appdata_t *appdata, gboolean in) {
269	struct html_view *html_view = appdata->html_view;
270
271	while(html_view) {
272	printf("zoom notify view %p\n", html_view->view);
273
274	if(in) gtk_html_zoom_in(GTK_HTML(html_view->view));
275	else gtk_html_zoom_out(GTK_HTML(html_view->view));
276
277	html_view = html_view->next;
278	}
279	}
280
281	#ifndef NO_COPY_N_PASTE
282	static void on_destroy_textview(GtkWidget *widget, gpointer data) {
283	appdata_t appdata = (appdata_t)data;
284	int destroy_active = FALSE;
285
286	/* only do this if main windows hasn't already been destroyed */
287	if(!appdata->window) {
288	printf("detroy_textview: main window is gone\n");
289	return;
290	}
291
292	if(!appdata->active_buffer)
293	printf("Destroy, but there was no active buffer!\n");
294	else {
295	if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
296	printf("destroying textview\n");
297
298	if(appdata->active_buffer ==
299	gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget))) {
300	printf("This was the active buffer\n");
301	destroy_active = TRUE;
302	}
303	} else {
304	if(widget == (GtkWidget*)appdata->active_buffer) {
305	printf("This was the active html view\n");
306	destroy_active = TRUE;
307	}
308	}
309	}
310
311	if(destroy_active) {
312	appdata->active_buffer = NULL;
313
314	gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
315	gtk_widget_set_sensitive(appdata->menu_copy, FALSE);
316	gtk_widget_set_sensitive(appdata->menu_paste, FALSE);
317	}
318	}
319	#endif
320
321	static void on_destroy_htmlview(GtkWidget *widget, gpointer data) {
322	http_context_t context = (http_context_t)data;
323
324	printf("destroying html context\n");
325	// printf("associated view = %p\n", context->view);
326
327	struct html_view **h = &(context->appdata->html_view);
328
329	while(h && (h)->view != context->view)
330	h = &((*h)->next);
331
332	g_assert(h);
333
334	/* remove entry from chain */
335	void tmp = h;
336	h = (h)->next;
337	free(tmp);
338
339	load_context_t *load_context = context->load_context;
340	while(load_context) {
341	printf("found an associated thread\n");
342
343	load_context_t *tmp_context = load_context->next;
344	release_load_context(NULL, load_context);
345	load_context = tmp_context;
346	}
347
348	#ifndef NO_COPY_N_PASTE
349	on_destroy_textview(widget, context->appdata);
350	#endif
351
352	/* destroy context */
353	free(data);
354	}
355
356	#ifndef NO_COPY_N_PASTE
357	static gboolean focus_in(GtkWidget widget, GdkEventFocus event,
358	gpointer data) {
359	appdata_t appdata = (appdata_t)data;
360
361	printf("focus in!\n");
362
363	/* these buffers are read-only, thus only "copy" is enabled */
364	gtk_widget_set_sensitive(appdata->menu_cut, FALSE);
365	gtk_widget_set_sensitive(appdata->menu_copy, TRUE);
366	gtk_widget_set_sensitive(appdata->menu_paste, FALSE);
367
368	if(GTK_WIDGET_TYPE(widget) == GTK_TYPE_TEXT_VIEW) {
369	appdata->active_buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(widget));
370	} else if(GTK_WIDGET_TYPE(widget) == gtk_html_get_type()) {
371	appdata->active_buffer = (GtkTextBuffer*)widget;
372	} else {
373	printf("not a text nor a html view\n");
374	}
375
376	return FALSE;
377	}
378
379	void html_copy_to_clipboard(appdata_t *appdata) {
380	gtk_html_copy(GTK_HTML(appdata->active_buffer));
381	}
382	#endif
383
384	#ifdef FREMANTLE
385	static void
386	tap_and_hold_cb (GtkWidget *widget, gpointer user_data) {
387	appdata_t appdata = (appdata_t)user_data;
388
389	/* the HildonTextView becomes semi-copy'n pasteable if we enable */
390	/* the cursor */
391	if(GTK_WIDGET_TYPE(widget) == HILDON_TYPE_TEXT_VIEW) {
392	gboolean state = gtk_text_view_get_cursor_visible(GTK_TEXT_VIEW(widget));
393	gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(widget), !state);
394	return;
395	}
396
397	#if 0
398	GtkWidget *parent = widget->parent;
399
400	/* check if the parent actually is a hildonpannablearea */
401	if(GTK_WIDGET_TYPE(parent) != HILDON_TYPE_PANNABLE_AREA) {
402	printf("parent is not pannable area, ignoring event\n");
403	return;
404	}
405
406	gboolean enabled = FALSE;
407	g_object_get(parent, "enabled", &enabled, NULL);
408	enabled = !enabled;
409	g_object_set(parent, "enabled", enabled, NULL);
410
411	hildon_banner_show_information(GTK_WIDGET(appdata->window),
412	NULL, enabled?"enabled":"disabled");
413	#endif
414	}
415	#endif
416
417	/* the cache descriptions are not valid html and need some surrounding stuff */
418	static const char *html_start = "<html><head>"
419	"<meta http-equiv=content-type content=\"text/html; charset=UTF-8\">"
420	"</head></body>";
421	static const char *html_end = "</body></html>";
422
423	GtkWidget html_view(appdata_t appdata, char *text,
424	html_mode_t mode, gboolean scrollwin,
425	cache_t cache, char anchor) {
426	GtkWidget *view;
427
428	if(mode == HTML_HTML) {
429	http_context_t *context = g_new0(http_context_t, 1);
430	context->appdata = appdata;
431	context->cache = cache;
432
433	context->view = view = gtk_html_new();
434
435	#ifndef PANNABLE_HTML
436	// gtk_html_set_auto_panning(GTK_HTML(view), TRUE);
437	#else
438	gtk_html_set_auto_panning(GTK_HTML(view), FALSE);
439	#endif
440
441	#ifdef FREMANTLE
442	/* allow selection does not allow anything, but disables auto panning ... */
443	/* even worse: frequently causes the device to reboot */
444	// gtk_html_allow_selection(GTK_HTML(view), TRUE);
445	#endif
446
447	/* create a callback to load images only if a cache has been given */
448	/* so that images can be cached/stored appropriately */
449	g_signal_connect(G_OBJECT(view), "url_requested",
450	G_CALLBACK(on_request_url), context);
451
452	#ifdef ENABLE_BROWSER_INTERFACE
453	g_signal_connect(G_OBJECT(view), "link_clicked",
454	G_CALLBACK(on_link_clicked), context->appdata);
455	#endif
456
457	GtkHTMLStream *stream = gtk_html_begin(GTK_HTML(view));
458
459	gtk_html_write(GTK_HTML(view), stream, html_start, strlen(html_start));
460	gtk_html_write(GTK_HTML(view), stream, text, strlen(text));
461	gtk_html_write(GTK_HTML(view), stream, html_end, strlen(html_end));
462	gtk_html_end(GTK_HTML(view), stream, GTK_HTML_STREAM_OK);
463
464	if(anchor) {
465	while(gtk_events_pending())
466	gtk_main_iteration ();
467
468	gtk_html_jump_to_anchor(GTK_HTML(context->view), anchor);
469	}
470
471	/* register this html view */
472	struct html_view **h = &(appdata->html_view);
473	while(h) h = &((h)->next);
474	*h = g_new0(struct html_view, 1);
475	(*h)->view = view;
476
477	#ifdef FREMANTLE
478	gtk_widget_tap_and_hold_setup(GTK_WIDGET(view), NULL, NULL, 0);
479	g_signal_connect(G_OBJECT(view), "tap-and-hold",
480	G_CALLBACK(tap_and_hold_cb), appdata);
481	#endif
482
483	g_signal_connect(G_OBJECT(view), "destroy",
484	G_CALLBACK(on_destroy_htmlview), context);
485	} else {
486	GtkTextBuffer *buffer = gtk_text_buffer_new(NULL);
487	gtk_text_buffer_set_text(buffer, text, strlen(text));
488
489	#ifndef USE_HILDON_TEXT_VIEW
490	view = gtk_text_view_new_with_buffer(buffer);
491	#else
492	view = hildon_text_view_new();
493	hildon_text_view_set_buffer(HILDON_TEXT_VIEW(view), buffer);
494
495	gtk_widget_tap_and_hold_setup(GTK_WIDGET(view), NULL, NULL, 0);
496	g_signal_connect(G_OBJECT(view), "tap-and-hold",
497	G_CALLBACK(tap_and_hold_cb), appdata);
498	#endif
499
500	gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(view), GTK_WRAP_WORD);
501	gtk_text_view_set_editable(GTK_TEXT_VIEW(view), FALSE);
502	gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(view), FALSE);
503
504	/* make this look nicer in fremantle and not just black-on-white */
505	/* just use the default style */
506	#ifdef USE_STACKABLE_WINDOW
507	/* in fremantle this is really tricky and we need to inherit the */
508	/* style from the topmost window in the stack */
509	HildonWindowStack *stack = hildon_window_stack_get_default();
510	GList *list = hildon_window_stack_get_windows(stack);
511	gtk_widget_set_style(view, GTK_WIDGET(list->data)->style);
512	g_list_free(list);
513	#else
514	gtk_widget_set_style(view, GTK_WIDGET(appdata->window)->style);
515	#endif
516
517	#ifndef NO_COPY_N_PASTE
518	g_signal_connect(G_OBJECT(view), "destroy",
519	G_CALLBACK(on_destroy_textview), appdata);
520	#endif
521	}
522
523	#ifndef NO_COPY_N_PASTE
524	g_signal_connect(G_OBJECT(view), "focus-in-event",
525	G_CALLBACK(focus_in), appdata);
526	#endif
527
528	if(scrollwin) {
529	#ifndef USE_PANNABLE_AREA
530	GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
531	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window),
532	GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
533	gtk_container_add(GTK_CONTAINER(scrolled_window), view);
534
535	return scrolled_window;
536	#else
537	#ifndef PANNABLE_HTML
538	if(mode == HTML_HTML) {
539	GtkWidget *scrolled_window = gtk_scrolled_window_new(NULL, NULL);
540	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW (scrolled_window),
541	GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
542	gtk_container_add(GTK_CONTAINER(scrolled_window), view);
543	return scrolled_window;
544	} else
545	#endif
546	{
547	GtkWidget *pannable_area = hildon_pannable_area_new();
548	gtk_container_add(GTK_CONTAINER(pannable_area), view);
549	return pannable_area;
550	}
551	#endif
552	}
553
554	return view;
555	}
556