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
 291 #ifdef MODEST_TOOLKIT_HILDON2
 292 #ifdef HAVE_GTK_HTML_SET_MAX_IMAGE_SIZE
 293         /* We set a maximum width of a bit less than the width of the screen, and a
 294            maximum height of 2 times the full size of the window. Should be enough */
 295         gtk_html_set_max_image_size (GTK_HTML (self), 720, 880);
 296 #endif
 297 #ifdef HAVE_GTK_HTML_SET_ALLOW_DND
 298         gtk_html_set_allow_dnd       (GTK_HTML(self), FALSE);
 299 #endif
 300 #endif
 301
 302 #ifdef HAVE_GTK_HTML_SET_DEFAULT_ENGINE
 303         /* Enable Content type handling */
 304         gtk_html_set_default_engine (GTK_HTML (self), TRUE);
 305 #endif
 306
 307         gdk_color_parse ("#fff", &base);
 308         gdk_color_parse ("#000", &text);
 309         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 310         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 311
 312         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 313                                                        G_OBJECT(self), "link_clicked",
 314                                                        G_CALLBACK(on_link_clicked), self);
 315         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 316                                                        G_OBJECT(self), "url_requested",
 317                                                        G_CALLBACK(on_url_requested), self);
 318         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 319                                                        G_OBJECT(self), "on_url",
 320                                                        G_CALLBACK(on_url), self);
 321         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 322                                                        G_OBJECT(self), "notify::style",
 323                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 324
 325         priv->part = NULL;
 326         priv->current_zoom = 1.0;
 327         priv->view_images = FALSE;
 328         priv->has_external_images = FALSE;
 329 }
 330
 331 static void
 332 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 333 {
 334         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 335
 336         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 337         priv->sighandlers = NULL;
 338
 339         G_OBJECT_CLASS (parent_class)->finalize (obj);
 340 }
 341
 342 static void
 343 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 344 {
 345         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 346
 347         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 348
 349         if (priv->part) {
 350                 g_object_unref (priv->part);
 351                 priv->part = NULL;
 352         }
 353
 354         G_OBJECT_CLASS (parent_class)->dispose (obj);
 355 }
 356
 357 /* GTKHTML SIGNALS HANDLERS */
 358
 359 static void
 360 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 361 {
 362         if (strcmp ("style", spec->name) == 0) {
 363                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 364                                  g_object_ref (obj), g_object_unref);
 365                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 366         }
 367 }
 368
 369 gboolean
 370 same_color (GdkColor *a, GdkColor *b)
 371 {
 372         return ((a->red == b->red) &&
 373                 (a->green == b->green) &&
 374                 (a->blue == b->blue));
 375 }
 376
 377 static gboolean
 378 update_style (ModestGtkhtmlMimePartView *self)
 379 {
 380         GdkColor base;
 381         GdkColor text;
 382         GtkRcStyle *rc_style;
 383
 384         gdk_threads_enter ();
 385
 386         if (GTK_WIDGET_VISIBLE (self)) {
 387                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 388
 389                 gdk_color_parse ("#fff", &base);
 390                 gdk_color_parse ("#000", &text);
 391
 392                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 393                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 394
 395                         rc_style->base[GTK_STATE_NORMAL] = base;
 396                         rc_style->text[GTK_STATE_NORMAL] = text;
 397                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 398                 }
 399         }
 400
 401         gdk_threads_leave ();
 402
 403         return FALSE;
 404 }
 405
 406
 407
 408 static gboolean
 409 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 410 {
 411         gboolean result;
 412         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 413
 414         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 415         return result;
 416 }
 417
 418 static gboolean
 419 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 420 {
 421         gboolean result;
 422         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 423
 424         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 425         return result;
 426 }
 427
 428 static gboolean
 429 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 430                   ModestGtkhtmlMimePartView *self)
 431 {
 432         gboolean result;
 433         TnyStream *tny_stream;
 434         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 435
 436         if (g_str_has_prefix (uri, "http:")) {
 437                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 438
 439                 if (!priv->view_images)
 440                         priv->has_external_images = TRUE;
 441         }
 442
 443         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 444         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 445         g_object_unref (tny_stream);
 446         return result;
 447 }
 448
 449 /* INTERNAL API */
 450 static void
 451 decode_to_stream_cb (TnyMimePart *self,
 452                      gboolean cancelled,
 453                      TnyStream *stream,
 454                      GError *err,
 455                      gpointer user_data)
 456 {
 457         ModestGtkhtmlMimePartView *view = (ModestGtkhtmlMimePartView *) user_data;
 458
 459         if (MODEST_IS_STREAM_TEXT_TO_HTML (stream)) {
 460                 if (tny_stream_write (stream, "\n", 1) == -1) {
 461                         g_warning ("failed to write CR in %s", __FUNCTION__);
 462                 }
 463                 if (modest_stream_text_to_html_limit_reached (MODEST_STREAM_TEXT_TO_HTML (stream))) {
 464                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 465                 }
 466                 tny_stream_reset (stream);
 467         } else {
 468                 if (modest_tny_stream_gtkhtml_limit_reached (MODEST_TNY_STREAM_GTKHTML (stream))) {
 469                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 470                 }
 471         }
 472         tny_stream_close (stream);
 473 }
 474
 475 static void
 476 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding)
 477 {
 478         GtkHTMLStream *gtkhtml_stream;
 479         TnyStream *tny_stream;
 480         gchar *content_type;
 481
 482         g_return_if_fail (self);
 483         g_return_if_fail (part);
 484
 485         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 486
 487         content_type = g_strdup_printf ("text/html; charset=%s", encoding);
 488         gtkhtml_stream = gtk_html_begin_full(GTK_HTML(self), NULL, content_type, 0);
 489         g_free (content_type);
 490
 491         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 492         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 493         tny_stream_reset (tny_stream);
 494
 495         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 496                                               tny_stream, decode_to_stream_cb,
 497                                               NULL, self);
 498         g_object_unref (tny_stream);
 499 }
 500
 501 static void
 502 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 503 {
 504         TnyStream* text_to_html_stream, *tny_stream;
 505         GtkHTMLStream *gtkhtml_stream;
 506
 507         g_return_if_fail (self);
 508         g_return_if_fail (part);
 509
 510         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 511
 512         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 513         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 514         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 515         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 516         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 517                                                       64*1024);
 518         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 519                                                    128*1024);
 520         modest_stream_text_to_html_set_line_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 521                                                    1024);
 522
 523         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 524                                               text_to_html_stream, decode_to_stream_cb,
 525                                               NULL, self);
 526
 527         g_object_unref (G_OBJECT(text_to_html_stream));
 528         g_object_unref (G_OBJECT(tny_stream));
 529 }
 530
 531 static void
 532 set_empty_part (ModestGtkhtmlMimePartView *self)
 533 {
 534         g_return_if_fail (self);
 535
 536         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 537         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 538 }
 539
 540 static void
 541 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 542 {
 543         ModestGtkhtmlMimePartViewPrivate *priv;
 544         gchar *header_content_type, *header_content_type_lower;
 545         const gchar *tmp;
 546         gchar *charset = NULL;
 547
 548         g_return_if_fail (self);
 549
 550         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 551         priv->has_external_images = FALSE;
 552
 553         if (part != priv->part) {
 554                 if (priv->part)
 555                         g_object_unref (G_OBJECT(priv->part));
 556                 if (part)
 557                         g_object_ref   (G_OBJECT(part));
 558                 priv->part = part;
 559         }
 560
 561         if (!part) {
 562                 set_empty_part (self);
 563                 return;
 564         }
 565
 566         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 567         if (header_content_type) {
 568                 header_content_type = g_strstrip (header_content_type);
 569                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 570         } else {
 571                 header_content_type_lower = NULL;
 572         }
 573
 574         if (header_content_type_lower) {
 575                 tmp = strstr (header_content_type_lower, "charset=");
 576                 if (tmp) {
 577                         const gchar *tmp2;
 578                         tmp = tmp + strlen ("charset=");
 579
 580                         tmp2 = strstr (tmp, ";");
 581                         if (tmp2) {
 582                                 charset = g_strndup (tmp, tmp2-tmp);
 583                         } else {
 584                                 charset = g_strdup (tmp);
 585                         }
 586                 }
 587         }
 588
 589         if (tny_mime_part_content_type_is (part, "text/html")) {
 590                 set_html_part (self, part, charset);
 591         } else {
 592                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 593                         if (header_content_type) {
 594                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 595                                         set_html_part (self, part, charset);
 596                                 else
 597                                         set_text_part (self, part);
 598
 599                         } else {
 600                                 set_text_part (self, part);
 601                         }
 602                 } else {
 603                         set_text_part (self, part);
 604                 }
 605         }
 606         g_free (header_content_type_lower);
 607         g_free (header_content_type);
 608
 609 }
 610
 611 static TnyMimePart*
 612 get_part (ModestGtkhtmlMimePartView *self)
 613 {
 614         TnyMimePart *part;
 615
 616         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 617
 618         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 619
 620         if (part)
 621                 g_object_ref (part);
 622
 623         return part;
 624 }
 625
 626 static gboolean
 627 has_contents_receiver (gpointer engine, const gchar *data,
 628                        size_t len, gboolean *has_contents)
 629 {
 630         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 631                 *has_contents = TRUE;
 632                 return FALSE;
 633         }
 634         return TRUE;
 635 }
 636
 637 static gboolean
 638 is_empty   (ModestGtkhtmlMimePartView *self)
 639 {
 640         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 641          * text in the message:
 642          */
 643         gboolean has_contents = FALSE;
 644
 645         gtk_html_export (GTK_HTML (self), "text/plain",
 646                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 647
 648         return !has_contents;
 649 }
 650
 651 static gboolean
 652 get_view_images   (ModestGtkhtmlMimePartView *self)
 653 {
 654         ModestGtkhtmlMimePartViewPrivate *priv;
 655
 656         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 657
 658         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 659         return priv->view_images;
 660 }
 661
 662 static void
 663 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 664 {
 665         ModestGtkhtmlMimePartViewPrivate *priv;
 666
 667         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 668
 669         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 670         priv->view_images = view_images;
 671 }
 672
 673 static gboolean
 674 has_external_images   (ModestGtkhtmlMimePartView *self)
 675 {
 676         ModestGtkhtmlMimePartViewPrivate *priv;
 677
 678         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 679
 680         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 681         return priv->has_external_images;
 682 }
 683
 684 static void
 685 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 686 {
 687         ModestGtkhtmlMimePartViewPrivate *priv;
 688
 689         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 690
 691         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 692         priv->current_zoom = zoom;
 693         gtk_html_set_magnification (GTK_HTML(self), zoom);
 694
 695         gtk_widget_queue_resize (GTK_WIDGET (self));
 696 }
 697
 698 static gdouble
 699 get_zoom (ModestGtkhtmlMimePartView *self)
 700 {
 701         ModestGtkhtmlMimePartViewPrivate *priv;
 702
 703         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 704
 705         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 706
 707         return priv->current_zoom;
 708 }
 709
 710 static gboolean
 711 search (ModestGtkhtmlMimePartView *self,
 712         const gchar *string)
 713 {
 714         return gtk_html_engine_search (GTK_HTML (self),
 715                                        string,
 716                                        FALSE,   /* case sensitive */
 717                                        TRUE,    /* forward */
 718                                        FALSE);  /* regexp */
 719 }
 720
 721 static gboolean
 722 search_next (ModestGtkhtmlMimePartView *self)
 723 {
 724         return gtk_html_engine_search_next (GTK_HTML (self));
 725 }
 726
 727 static gboolean
 728 get_selection_area (ModestGtkhtmlMimePartView *self,
 729                     gint *x, gint *y,
 730                     gint *width, gint *height)
 731 {
 732 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 733         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 734         return TRUE;
 735 #else
 736         return FALSE;
 737 #endif
 738 }
 739
 740
 741 /* TNY MIME PART IMPLEMENTATION */
 742
 743 static void
 744 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 745 {
 746         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 747
 748         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 749         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 750         klass->clear = modest_gtkhtml_mime_part_view_clear;
 751
 752         return;
 753 }
 754
 755 static TnyMimePart*
 756 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 757 {
 758         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 759 }
 760
 761
 762 static TnyMimePart*
 763 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 764 {
 765         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 766 }
 767
 768 static void
 769 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 770                                         TnyMimePart *part)
 771 {
 772         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 773 }
 774
 775 static void
 776 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 777                                                 TnyMimePart *part)
 778 {
 779         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 780
 781         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 782 }
 783
 784 static void
 785 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 786 {
 787         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 788 }
 789
 790 static void
 791 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 792 {
 793         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 794 }
 795
 796 /* MODEST MIME PART VIEW IMPLEMENTATION */
 797
 798 static void
 799 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 800 {
 801         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 802
 803         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 804         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 805         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 806         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 807
 808         return;
 809 }
 810
 811 static gboolean
 812 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 813 {
 814         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 815 }
 816
 817 static gboolean
 818 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 819 {
 820         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 821 }
 822
 823 static void
 824 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 825 {
 826         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 827 }
 828
 829 static gboolean
 830 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 831 {
 832         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 833 }
 834
 835 static gboolean
 836 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 837 {
 838         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 839 }
 840
 841 static gboolean
 842 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 843 {
 844         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 845 }
 846
 847 static void
 848 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 849 {
 850         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 851 }
 852
 853 static gboolean
 854 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 855 {
 856         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 857 }
 858
 859
 860 /* MODEST ZOOMABLE IMPLEMENTATION */
 861 static void
 862 modest_zoomable_init (gpointer g, gpointer iface_data)
 863 {
 864         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 865
 866         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 867         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 868         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 869         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 870
 871         return;
 872 }
 873
 874 static gdouble
 875 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 876 {
 877         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 878 }
 879
 880 static gdouble
 881 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 882 {
 883         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 884 }
 885
 886 static void
 887 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 888 {
 889         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 890 }
 891
 892 static void
 893 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 894 {
 895         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 896 }
 897
 898 static gboolean
 899 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 900 {
 901         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 902 }
 903
 904 static gboolean
 905 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 906 {
 907         /* operation not supported in ModestGtkhtmlMimePartView */
 908         return FALSE;
 909 }
 910
 911 static gboolean
 912 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 913 {
 914         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 915 }
 916
 917 static gboolean
 918 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 919 {
 920         /* operation not supported in ModestGtkhtmlMimePartView */
 921         return FALSE;
 922 }
 923
 924 /* ISEARCH VIEW IMPLEMENTATION */
 925 static void
 926 modest_isearch_view_init (gpointer g, gpointer iface_data)
 927 {
 928         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 929
 930         klass->search_func = modest_gtkhtml_mime_part_view_search;
 931         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 932         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 933
 934         return;
 935 }
 936
 937 static gboolean
 938 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 939 {
 940         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 941 }
 942
 943 static gboolean
 944 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 945 {
 946         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 947 }
 948
 949 static gboolean
 950 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 951 {
 952         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 953 }
 954
 955 static gboolean
 956 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 957 {
 958         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 959 }
 960
 961 static gboolean
 962 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 963                                                   gint *width, gint *height)
 964 {
 965         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 966 }
 967
 968 static gboolean
 969 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 970                                                           gint *width, gint *height)
 971 {
 972         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 973 }