git.maemo.org Git - modest/blob - src/widgets/modest-gtkhtml-mime-part-view.c

   1 /* Copyright (c) 2006, 2007, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <config.h>
  31 #include <widgets/modest-gtkhtml-mime-part-view.h>
  32 #include <string.h>
  33 #include <gtkhtml/gtkhtml-stream.h>
  34 #include <gtkhtml/gtkhtml-search.h>
  35 #include <tny-stream.h>
  36 #include <tny-mime-part-view.h>
  37 #include "modest-tny-mime-part.h"
  38 #include <modest-stream-text-to-html.h>
  39 #include <modest-text-utils.h>
  40 #include <modest-conf.h>
  41 #include <modest-runtime.h>
  42 #include <widgets/modest-mime-part-view.h>
  43 #include <widgets/modest-zoomable.h>
  44 #include <widgets/modest-tny-stream-gtkhtml.h>
  45 #include <libgnomevfs/gnome-vfs.h>
  46 #include <gdk/gdkkeysyms.h>
  47 #include <modest-ui-constants.h>
  48
  49 /* gobject structure methods */
  50 static void    modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass);
  51 static void    tny_mime_part_view_init                  (gpointer g, gpointer iface_data);
  52 static void    modest_mime_part_view_init               (gpointer g, gpointer iface_data);
  53 static void    modest_zoomable_init                     (gpointer g, gpointer iface_data);
  54 static void    modest_isearch_view_init                 (gpointer g, gpointer iface_data);
  55 static void    modest_gtkhtml_mime_part_view_init       (ModestGtkhtmlMimePartView *self);
  56 static void    modest_gtkhtml_mime_part_view_finalize   (GObject *self);
  57 static void    modest_gtkhtml_mime_part_view_dispose    (GObject *self);
  58
  59 /* GtkHTML signal handlers */
  60 static gboolean  on_link_clicked  (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  61 static gboolean  on_url           (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  62 static gboolean  on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
  63                                    ModestGtkhtmlMimePartView *self);
  64 static void      on_notify_style  (GObject *obj, GParamSpec *spec, gpointer userdata);
  65 static gboolean  update_style     (ModestGtkhtmlMimePartView *self);
  66 /* TnyMimePartView implementation */
  67 static void modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self);
  68 static void modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self);
  69 static void modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self, TnyMimePart *part);
  70 static void modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self, TnyMimePart *part);
  71 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self);
  72 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self);
  73 /* ModestMimePartView implementation */
  74 static gboolean modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self);
  75 static gboolean modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self);
  76 static gboolean modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self);
  77 static gboolean modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self);
  78 static void     modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images);
  79 static void     modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images);
  80 static gboolean modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self);
  81 static gboolean modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self);
  82 /* ModestZoomable implementation */
  83 static gdouble modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self);
  84 static void modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value);
  85 static gboolean modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self);
  86 static gboolean modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self);
  87 static gdouble modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self);
  88 static void modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value);
  89 static gboolean modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self);
  90 static gboolean modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self);
  91 /* ModestISearchView implementation */
  92 static gboolean modest_gtkhtml_mime_part_view_search                    (ModestISearchView *self, const gchar *string);
  93 static gboolean modest_gtkhtml_mime_part_view_search_next               (ModestISearchView *self);
  94 static gboolean modest_gtkhtml_mime_part_view_get_selection_area        (ModestISearchView *self, gint *x, gint *y,
  95                                                                          gint *width, gint *height);
  96 static gboolean modest_gtkhtml_mime_part_view_search_default            (ModestISearchView *self, const gchar *string);
  97 static gboolean modest_gtkhtml_mime_part_view_search_next_default       (ModestISearchView *self);
  98 static gboolean modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
  99                                                                           gint *width, gint *height);
 100
 101
 102 /* internal api */
 103 static TnyMimePart  *get_part   (ModestGtkhtmlMimePartView *self);
 104 static void          set_html_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding);
 105 static void          set_text_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 106 static void          set_empty_part  (ModestGtkhtmlMimePartView *self);
 107 static void          set_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 108 static gboolean      is_empty   (ModestGtkhtmlMimePartView *self);
 109 static gboolean      get_view_images   (ModestGtkhtmlMimePartView *self);
 110 static void          set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images);
 111 static gboolean      has_external_images   (ModestGtkhtmlMimePartView *self);
 112 static void          set_zoom   (ModestGtkhtmlMimePartView *self, gdouble zoom);
 113 static gdouble       get_zoom   (ModestGtkhtmlMimePartView *self);
 114 static gboolean      has_contents_receiver (gpointer engine, const gchar *data,
 115                                             size_t len, gboolean *has_contents);
 116 static gboolean      search             (ModestGtkhtmlMimePartView *self, const gchar *string);
 117 static gboolean      search_next        (ModestGtkhtmlMimePartView *self);
 118 static gboolean      get_selection_area (ModestGtkhtmlMimePartView *self, gint *x, gint *y,
 119                                          gint *width, gint *height);
 120
 121 typedef struct _ModestGtkhtmlMimePartViewPrivate ModestGtkhtmlMimePartViewPrivate;
 122 struct _ModestGtkhtmlMimePartViewPrivate {
 123         TnyMimePart *part;
 124         gdouble current_zoom;
 125         gboolean view_images;
 126         gboolean has_external_images;
 127         GSList *sighandlers;
 128 };
 129
 130 #define MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
 131                                                                                        MODEST_TYPE_GTKHTML_MIME_PART_VIEW, \
 132                                                                                        ModestGtkhtmlMimePartViewPrivate))
 133
 134 enum {
 135         STOP_STREAMS_SIGNAL,
 136         LIMIT_ERROR_SIGNAL,
 137         LAST_SIGNAL
 138 };
 139
 140 static GtkHTMLClass *parent_class = NULL;
 141
 142 static guint signals[LAST_SIGNAL] = {0};
 143
 144 GtkWidget *
 145 modest_gtkhtml_mime_part_view_new ()
 146 {
 147         return g_object_new (MODEST_TYPE_GTKHTML_MIME_PART_VIEW, NULL);
 148 }
 149
 150 /* GOBJECT IMPLEMENTATION */
 151 GType
 152 modest_gtkhtml_mime_part_view_get_type (void)
 153 {
 154         static GType my_type = 0;
 155         if (!my_type) {
 156                 static const GTypeInfo my_info = {
 157                         sizeof(ModestGtkhtmlMimePartViewClass),
 158                         NULL,           /* base init */
 159                         NULL,           /* base finalize */
 160                         (GClassInitFunc) modest_gtkhtml_mime_part_view_class_init,
 161                         NULL,           /* class finalize */
 162                         NULL,           /* class data */
 163                         sizeof(ModestGtkhtmlMimePartView),
 164                         1,              /* n_preallocs */
 165                         (GInstanceInitFunc) modest_gtkhtml_mime_part_view_init,
 166                         NULL
 167                 };
 168
 169                 static const GInterfaceInfo tny_mime_part_view_info =
 170                 {
 171                   (GInterfaceInitFunc) tny_mime_part_view_init, /* interface_init */
 172                   NULL,         /* interface_finalize */
 173                   NULL          /* interface_data */
 174                 };
 175
 176                 static const GInterfaceInfo modest_mime_part_view_info =
 177                 {
 178                   (GInterfaceInitFunc) modest_mime_part_view_init, /* interface_init */
 179                   NULL,         /* interface_finalize */
 180                   NULL          /* interface_data */
 181                 };
 182
 183                 static const GInterfaceInfo modest_zoomable_info =
 184                 {
 185                   (GInterfaceInitFunc) modest_zoomable_init, /* interface_init */
 186                   NULL,         /* interface_finalize */
 187                   NULL          /* interface_data */
 188                 };
 189
 190                 static const GInterfaceInfo modest_isearch_view_info =
 191                 {
 192                   (GInterfaceInitFunc) modest_isearch_view_init, /* interface_init */
 193                   NULL,         /* interface_finalize */
 194                   NULL          /* interface_data */
 195                 };
 196
 197                 my_type = g_type_register_static (GTK_TYPE_HTML,
 198                                                   "ModestGtkhtmlMimePartView",
 199                                                   &my_info, 0);
 200
 201                 g_type_add_interface_static (my_type, TNY_TYPE_MIME_PART_VIEW,
 202                         &tny_mime_part_view_info);
 203
 204                 g_type_add_interface_static (my_type, MODEST_TYPE_MIME_PART_VIEW,
 205                         &modest_mime_part_view_info);
 206
 207                 g_type_add_interface_static (my_type, MODEST_TYPE_ZOOMABLE,
 208                         &modest_zoomable_info);
 209                 g_type_add_interface_static (my_type, MODEST_TYPE_ISEARCH_VIEW,
 210                         &modest_isearch_view_info);
 211         }
 212         return my_type;
 213 }
 214
 215 static void
 216 modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass)
 217 {
 218         GObjectClass *gobject_class;
 219         GtkBindingSet *binding_set;
 220
 221         gobject_class = (GObjectClass*) klass;
 222
 223         parent_class            = g_type_class_peek_parent (klass);
 224         gobject_class->dispose = modest_gtkhtml_mime_part_view_dispose;
 225         gobject_class->finalize = modest_gtkhtml_mime_part_view_finalize;
 226
 227         klass->get_part_func = modest_gtkhtml_mime_part_view_get_part_default;
 228         klass->set_part_func = modest_gtkhtml_mime_part_view_set_part_default;
 229         klass->clear_func = modest_gtkhtml_mime_part_view_clear_default;
 230         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty_default;
 231         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images_default;
 232         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images_default;
 233         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images_default;
 234         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom_default;
 235         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom_default;
 236         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus_default;
 237         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus_default;
 238         klass->search_func = modest_gtkhtml_mime_part_view_search_default;
 239         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next_default;
 240         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area_default;
 241
 242         binding_set = gtk_binding_set_by_class (klass);
 243         gtk_binding_entry_skip (binding_set, GDK_Down, 0);
 244         gtk_binding_entry_skip (binding_set, GDK_Up, 0);
 245         gtk_binding_entry_skip (binding_set, GDK_KP_Up, 0);
 246         gtk_binding_entry_skip (binding_set, GDK_KP_Down, 0);
 247         gtk_binding_entry_skip (binding_set, GDK_Page_Down, 0);
 248         gtk_binding_entry_skip (binding_set, GDK_Page_Up, 0);
 249         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Up, 0);
 250         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Down, 0);
 251         gtk_binding_entry_skip (binding_set, GDK_Home, 0);
 252         gtk_binding_entry_skip (binding_set, GDK_End, 0);
 253         gtk_binding_entry_skip (binding_set, GDK_KP_Home, 0);
 254         gtk_binding_entry_skip (binding_set, GDK_KP_End, 0);
 255
 256         g_type_class_add_private (gobject_class, sizeof(ModestGtkhtmlMimePartViewPrivate));
 257
 258         signals[STOP_STREAMS_SIGNAL] =
 259                 g_signal_new ("stop-streams",
 260                               G_TYPE_FROM_CLASS (gobject_class),
 261                               G_SIGNAL_RUN_FIRST,
 262                               G_STRUCT_OFFSET (ModestGtkhtmlMimePartViewClass,stop_streams),
 263                               NULL, NULL,
 264                               g_cclosure_marshal_VOID__VOID,
 265                               G_TYPE_NONE, 0);
 266
 267         signals[LIMIT_ERROR_SIGNAL] =
 268                 g_signal_new ("limit-error",
 269                               G_TYPE_FROM_CLASS (gobject_class),
 270                               G_SIGNAL_RUN_FIRST,
 271                               G_STRUCT_OFFSET (ModestGtkhtmlMimePartViewClass,limit_error),
 272                               NULL, NULL,
 273                               g_cclosure_marshal_VOID__VOID,
 274                               G_TYPE_NONE, 0);
 275
 276 }
 277
 278 static void
 279 modest_gtkhtml_mime_part_view_init (ModestGtkhtmlMimePartView *self)
 280 {
 281         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 282         GdkColor base;
 283         GdkColor text;
 284
 285         gtk_html_set_editable        (GTK_HTML(self), FALSE);
 286         gtk_html_allow_selection     (GTK_HTML(self), TRUE);
 287         gtk_html_set_caret_mode      (GTK_HTML(self), FALSE);
 288         gtk_html_set_blocking        (GTK_HTML(self), TRUE);
 289         gtk_html_set_images_blocking (GTK_HTML(self), TRUE);
 290         /* We don't need this for Hildon2 as this widget will be most
 291            likely inside pannable area */
 292 #ifndef MODEST_TOOLKIT_HILDON2
 293         gtk_html_set_auto_panning    (GTK_HTML (self), TRUE);
 294 #endif
 295
 296 #ifdef MODEST_TOOLKIT_HILDON2
 297 #ifdef HAVE_GTK_HTML_SET_MAX_IMAGE_SIZE
 298         /* We set a maximum width of a bit less than the width of the screen, and a
 299            maximum height of 2 times the full size of the window. Should be enough */
 300         gtk_html_set_max_image_size (GTK_HTML (self), 720, 880);
 301 #endif
 302 #ifdef HAVE_GTK_HTML_SET_ALLOW_DND
 303         gtk_html_set_allow_dnd       (GTK_HTML(self), FALSE);
 304 #endif
 305 #ifdef HAVE_GTK_HTML_SET_WORD_CHAR_WRAPPING
 306         gtk_html_set_word_char_wrapping (GTK_HTML (self), TRUE);
 307 #endif
 308 #endif
 309
 310 #ifdef HAVE_GTK_HTML_SET_DEFAULT_ENGINE
 311         /* Enable Content type handling */
 312         gtk_html_set_default_engine (GTK_HTML (self), TRUE);
 313 #endif
 314
 315         gdk_color_parse ("#fff", &base);
 316         gdk_color_parse ("#000", &text);
 317         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 318         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 319
 320         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 321                                                        G_OBJECT(self), "link_clicked",
 322                                                        G_CALLBACK(on_link_clicked), self);
 323         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 324                                                        G_OBJECT(self), "url_requested",
 325                                                        G_CALLBACK(on_url_requested), self);
 326         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 327                                                        G_OBJECT(self), "on_url",
 328                                                        G_CALLBACK(on_url), self);
 329         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 330                                                        G_OBJECT(self), "notify::style",
 331                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 332
 333         priv->part = NULL;
 334         priv->current_zoom = 1.0;
 335         priv->view_images = FALSE;
 336         priv->has_external_images = FALSE;
 337 }
 338
 339 static void
 340 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 341 {
 342         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 343
 344         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 345         priv->sighandlers = NULL;
 346
 347         G_OBJECT_CLASS (parent_class)->finalize (obj);
 348 }
 349
 350 static void
 351 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 352 {
 353         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 354
 355         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 356
 357         if (priv->part) {
 358                 g_object_unref (priv->part);
 359                 priv->part = NULL;
 360         }
 361
 362         G_OBJECT_CLASS (parent_class)->dispose (obj);
 363 }
 364
 365 /* GTKHTML SIGNALS HANDLERS */
 366
 367 static void
 368 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 369 {
 370         if (strcmp ("style", spec->name) == 0) {
 371                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 372                                  g_object_ref (obj), g_object_unref);
 373                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 374         }
 375 }
 376
 377 gboolean
 378 same_color (GdkColor *a, GdkColor *b)
 379 {
 380         return ((a->red == b->red) &&
 381                 (a->green == b->green) &&
 382                 (a->blue == b->blue));
 383 }
 384
 385 static gboolean
 386 update_style (ModestGtkhtmlMimePartView *self)
 387 {
 388         GdkColor base;
 389         GdkColor text;
 390         GtkRcStyle *rc_style;
 391
 392         gdk_threads_enter ();
 393
 394         if (GTK_WIDGET_VISIBLE (self)) {
 395                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 396
 397                 gdk_color_parse ("#fff", &base);
 398                 gdk_color_parse ("#000", &text);
 399
 400                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 401                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 402
 403                         rc_style->base[GTK_STATE_NORMAL] = base;
 404                         rc_style->text[GTK_STATE_NORMAL] = text;
 405                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 406                 }
 407         }
 408
 409         gdk_threads_leave ();
 410
 411         return FALSE;
 412 }
 413
 414
 415
 416 static gboolean
 417 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 418 {
 419         gboolean result;
 420         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 421
 422         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 423         return result;
 424 }
 425
 426 static gboolean
 427 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 428 {
 429         gboolean result;
 430         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 431
 432         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 433         return result;
 434 }
 435
 436 static gboolean
 437 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 438                   ModestGtkhtmlMimePartView *self)
 439 {
 440         gboolean result;
 441         TnyStream *tny_stream;
 442         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 443
 444         if (g_str_has_prefix (uri, "http:")) {
 445                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 446
 447                 if (!priv->view_images)
 448                         priv->has_external_images = TRUE;
 449         }
 450
 451         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 452         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 453         g_object_unref (tny_stream);
 454         return result;
 455 }
 456
 457 /* INTERNAL API */
 458 static void
 459 decode_to_stream_cb (TnyMimePart *self,
 460                      gboolean cancelled,
 461                      TnyStream *stream,
 462                      GError *err,
 463                      gpointer user_data)
 464 {
 465         ModestGtkhtmlMimePartView *view = (ModestGtkhtmlMimePartView *) user_data;
 466
 467         if (MODEST_IS_STREAM_TEXT_TO_HTML (stream)) {
 468                 if (tny_stream_write (stream, "\n", 1) == -1) {
 469                         g_warning ("failed to write CR in %s", __FUNCTION__);
 470                 }
 471                 if (modest_stream_text_to_html_limit_reached (MODEST_STREAM_TEXT_TO_HTML (stream))) {
 472                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 473                 }
 474                 tny_stream_reset (stream);
 475         } else {
 476                 if (modest_tny_stream_gtkhtml_limit_reached (MODEST_TNY_STREAM_GTKHTML (stream))) {
 477                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 478                 }
 479         }
 480         tny_stream_close (stream);
 481 }
 482
 483 static void
 484 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding)
 485 {
 486         GtkHTMLStream *gtkhtml_stream;
 487         TnyStream *tny_stream;
 488         gchar *content_type;
 489
 490         g_return_if_fail (self);
 491         g_return_if_fail (part);
 492
 493         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 494
 495         content_type = g_strdup_printf ("text/html; charset=%s", encoding);
 496         gtkhtml_stream = gtk_html_begin_full(GTK_HTML(self), NULL, content_type, 0);
 497         g_free (content_type);
 498
 499         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 500         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 501         tny_stream_reset (tny_stream);
 502
 503         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 504                                               tny_stream, decode_to_stream_cb,
 505                                               NULL, self);
 506         g_object_unref (tny_stream);
 507 }
 508
 509 static void
 510 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 511 {
 512         TnyStream* text_to_html_stream, *tny_stream;
 513         GtkHTMLStream *gtkhtml_stream;
 514
 515         g_return_if_fail (self);
 516         g_return_if_fail (part);
 517
 518         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 519
 520         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 521         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 522         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 523         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 524         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 525                                                       64*1024);
 526         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 527                                                    128*1024);
 528         modest_stream_text_to_html_set_line_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 529                                                    1024);
 530
 531         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 532                                               text_to_html_stream, decode_to_stream_cb,
 533                                               NULL, self);
 534
 535         g_object_unref (G_OBJECT(text_to_html_stream));
 536         g_object_unref (G_OBJECT(tny_stream));
 537 }
 538
 539 static void
 540 set_empty_part (ModestGtkhtmlMimePartView *self)
 541 {
 542         g_return_if_fail (self);
 543
 544         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 545         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 546 }
 547
 548 static void
 549 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 550 {
 551         ModestGtkhtmlMimePartViewPrivate *priv;
 552         gchar *header_content_type, *header_content_type_lower;
 553         const gchar *tmp;
 554         gchar *charset = NULL;
 555
 556         g_return_if_fail (self);
 557
 558         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 559         priv->has_external_images = FALSE;
 560
 561         if (part != priv->part) {
 562                 if (priv->part)
 563                         g_object_unref (G_OBJECT(priv->part));
 564                 if (part)
 565                         g_object_ref   (G_OBJECT(part));
 566                 priv->part = part;
 567         }
 568
 569         if (!part) {
 570                 set_empty_part (self);
 571                 return;
 572         }
 573
 574         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 575         if (header_content_type) {
 576                 header_content_type = g_strstrip (header_content_type);
 577                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 578         } else {
 579                 header_content_type_lower = NULL;
 580         }
 581
 582         if (header_content_type_lower) {
 583                 tmp = strstr (header_content_type_lower, "charset=");
 584                 if (tmp) {
 585                         const gchar *tmp2;
 586                         tmp = tmp + strlen ("charset=");
 587
 588                         tmp2 = strstr (tmp, ";");
 589                         if (tmp2) {
 590                                 charset = g_strndup (tmp, tmp2-tmp);
 591                         } else {
 592                                 charset = g_strdup (tmp);
 593                         }
 594                 }
 595         }
 596
 597         if (tny_mime_part_content_type_is (part, "text/html")) {
 598                 set_html_part (self, part, charset);
 599         } else {
 600                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 601                         if (header_content_type) {
 602                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 603                                         set_html_part (self, part, charset);
 604                                 else
 605                                         set_text_part (self, part);
 606
 607                         } else {
 608                                 set_text_part (self, part);
 609                         }
 610                 } else {
 611                         set_text_part (self, part);
 612                 }
 613         }
 614         g_free (header_content_type_lower);
 615         g_free (header_content_type);
 616
 617 }
 618
 619 static TnyMimePart*
 620 get_part (ModestGtkhtmlMimePartView *self)
 621 {
 622         TnyMimePart *part;
 623
 624         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 625
 626         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 627
 628         if (part)
 629                 g_object_ref (part);
 630
 631         return part;
 632 }
 633
 634 static gboolean
 635 has_contents_receiver (gpointer engine, const gchar *data,
 636                        size_t len, gboolean *has_contents)
 637 {
 638         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 639                 *has_contents = TRUE;
 640                 return FALSE;
 641         }
 642         return TRUE;
 643 }
 644
 645 static gboolean
 646 is_empty   (ModestGtkhtmlMimePartView *self)
 647 {
 648         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 649          * text in the message:
 650          */
 651         gboolean has_contents = FALSE;
 652
 653         gtk_html_export (GTK_HTML (self), "text/plain",
 654                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 655
 656         return !has_contents;
 657 }
 658
 659 static gboolean
 660 get_view_images   (ModestGtkhtmlMimePartView *self)
 661 {
 662         ModestGtkhtmlMimePartViewPrivate *priv;
 663
 664         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 665
 666         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 667         return priv->view_images;
 668 }
 669
 670 static void
 671 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 672 {
 673         ModestGtkhtmlMimePartViewPrivate *priv;
 674
 675         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 676
 677         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 678         priv->view_images = view_images;
 679 }
 680
 681 static gboolean
 682 has_external_images   (ModestGtkhtmlMimePartView *self)
 683 {
 684         ModestGtkhtmlMimePartViewPrivate *priv;
 685
 686         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 687
 688         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 689         return priv->has_external_images;
 690 }
 691
 692 static void
 693 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 694 {
 695         ModestGtkhtmlMimePartViewPrivate *priv;
 696
 697         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 698
 699         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 700         priv->current_zoom = zoom;
 701         gtk_html_set_magnification (GTK_HTML(self), zoom);
 702
 703         gtk_widget_queue_resize (GTK_WIDGET (self));
 704 }
 705
 706 static gdouble
 707 get_zoom (ModestGtkhtmlMimePartView *self)
 708 {
 709         ModestGtkhtmlMimePartViewPrivate *priv;
 710
 711         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 712
 713         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 714
 715         return priv->current_zoom;
 716 }
 717
 718 static gboolean
 719 search (ModestGtkhtmlMimePartView *self,
 720         const gchar *string)
 721 {
 722         return gtk_html_engine_search (GTK_HTML (self),
 723                                        string,
 724                                        FALSE,   /* case sensitive */
 725                                        TRUE,    /* forward */
 726                                        FALSE);  /* regexp */
 727 }
 728
 729 static gboolean
 730 search_next (ModestGtkhtmlMimePartView *self)
 731 {
 732         return gtk_html_engine_search_next (GTK_HTML (self));
 733 }
 734
 735 static gboolean
 736 get_selection_area (ModestGtkhtmlMimePartView *self,
 737                     gint *x, gint *y,
 738                     gint *width, gint *height)
 739 {
 740 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 741         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 742         return TRUE;
 743 #else
 744         return FALSE;
 745 #endif
 746 }
 747
 748
 749 /* TNY MIME PART IMPLEMENTATION */
 750
 751 static void
 752 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 753 {
 754         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 755
 756         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 757         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 758         klass->clear = modest_gtkhtml_mime_part_view_clear;
 759
 760         return;
 761 }
 762
 763 static TnyMimePart*
 764 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 765 {
 766         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 767 }
 768
 769
 770 static TnyMimePart*
 771 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 772 {
 773         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 774 }
 775
 776 static void
 777 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 778                                         TnyMimePart *part)
 779 {
 780         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 781 }
 782
 783 static void
 784 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 785                                                 TnyMimePart *part)
 786 {
 787         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 788
 789         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 790 }
 791
 792 static void
 793 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 794 {
 795         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 796 }
 797
 798 static void
 799 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 800 {
 801         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 802 }
 803
 804 /* MODEST MIME PART VIEW IMPLEMENTATION */
 805
 806 static void
 807 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 808 {
 809         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 810
 811         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 812         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 813         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 814         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 815
 816         return;
 817 }
 818
 819 static gboolean
 820 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 821 {
 822         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 823 }
 824
 825 static gboolean
 826 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 827 {
 828         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 829 }
 830
 831 static void
 832 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 833 {
 834         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 835 }
 836
 837 static gboolean
 838 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 839 {
 840         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 841 }
 842
 843 static gboolean
 844 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 845 {
 846         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 847 }
 848
 849 static gboolean
 850 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 851 {
 852         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 853 }
 854
 855 static void
 856 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 857 {
 858         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 859 }
 860
 861 static gboolean
 862 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 863 {
 864         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 865 }
 866
 867
 868 /* MODEST ZOOMABLE IMPLEMENTATION */
 869 static void
 870 modest_zoomable_init (gpointer g, gpointer iface_data)
 871 {
 872         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 873
 874         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 875         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 876         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 877         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 878
 879         return;
 880 }
 881
 882 static gdouble
 883 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 884 {
 885         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 886 }
 887
 888 static gdouble
 889 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 890 {
 891         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 892 }
 893
 894 static void
 895 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 896 {
 897         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 898 }
 899
 900 static void
 901 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 902 {
 903         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 904 }
 905
 906 static gboolean
 907 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 908 {
 909         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 910 }
 911
 912 static gboolean
 913 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 914 {
 915         /* operation not supported in ModestGtkhtmlMimePartView */
 916         return FALSE;
 917 }
 918
 919 static gboolean
 920 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 921 {
 922         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 923 }
 924
 925 static gboolean
 926 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 927 {
 928         /* operation not supported in ModestGtkhtmlMimePartView */
 929         return FALSE;
 930 }
 931
 932 /* ISEARCH VIEW IMPLEMENTATION */
 933 static void
 934 modest_isearch_view_init (gpointer g, gpointer iface_data)
 935 {
 936         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 937
 938         klass->search_func = modest_gtkhtml_mime_part_view_search;
 939         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 940         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 941
 942         return;
 943 }
 944
 945 static gboolean
 946 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 947 {
 948         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 949 }
 950
 951 static gboolean
 952 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 953 {
 954         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 955 }
 956
 957 static gboolean
 958 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 959 {
 960         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 961 }
 962
 963 static gboolean
 964 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 965 {
 966         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 967 }
 968
 969 static gboolean
 970 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 971                                                   gint *width, gint *height)
 972 {
 973         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 974 }
 975
 976 static gboolean
 977 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 978                                                           gint *width, gint *height)
 979 {
 980         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 981 }