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);
 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         LAST_SIGNAL
 137 };
 138
 139 static GtkHTMLClass *parent_class = NULL;
 140
 141 static guint signals[LAST_SIGNAL] = {0};
 142
 143 GtkWidget *
 144 modest_gtkhtml_mime_part_view_new ()
 145 {
 146         return g_object_new (MODEST_TYPE_GTKHTML_MIME_PART_VIEW, NULL);
 147 }
 148
 149 /* GOBJECT IMPLEMENTATION */
 150 GType
 151 modest_gtkhtml_mime_part_view_get_type (void)
 152 {
 153         static GType my_type = 0;
 154         if (!my_type) {
 155                 static const GTypeInfo my_info = {
 156                         sizeof(ModestGtkhtmlMimePartViewClass),
 157                         NULL,           /* base init */
 158                         NULL,           /* base finalize */
 159                         (GClassInitFunc) modest_gtkhtml_mime_part_view_class_init,
 160                         NULL,           /* class finalize */
 161                         NULL,           /* class data */
 162                         sizeof(ModestGtkhtmlMimePartView),
 163                         1,              /* n_preallocs */
 164                         (GInstanceInitFunc) modest_gtkhtml_mime_part_view_init,
 165                         NULL
 166                 };
 167
 168                 static const GInterfaceInfo tny_mime_part_view_info =
 169                 {
 170                   (GInterfaceInitFunc) tny_mime_part_view_init, /* interface_init */
 171                   NULL,         /* interface_finalize */
 172                   NULL          /* interface_data */
 173                 };
 174
 175                 static const GInterfaceInfo modest_mime_part_view_info =
 176                 {
 177                   (GInterfaceInitFunc) modest_mime_part_view_init, /* interface_init */
 178                   NULL,         /* interface_finalize */
 179                   NULL          /* interface_data */
 180                 };
 181
 182                 static const GInterfaceInfo modest_zoomable_info =
 183                 {
 184                   (GInterfaceInitFunc) modest_zoomable_init, /* interface_init */
 185                   NULL,         /* interface_finalize */
 186                   NULL          /* interface_data */
 187                 };
 188
 189                 static const GInterfaceInfo modest_isearch_view_info =
 190                 {
 191                   (GInterfaceInitFunc) modest_isearch_view_init, /* interface_init */
 192                   NULL,         /* interface_finalize */
 193                   NULL          /* interface_data */
 194                 };
 195
 196                 my_type = g_type_register_static (GTK_TYPE_HTML,
 197                                                   "ModestGtkhtmlMimePartView",
 198                                                   &my_info, 0);
 199
 200                 g_type_add_interface_static (my_type, TNY_TYPE_MIME_PART_VIEW,
 201                         &tny_mime_part_view_info);
 202
 203                 g_type_add_interface_static (my_type, MODEST_TYPE_MIME_PART_VIEW,
 204                         &modest_mime_part_view_info);
 205
 206                 g_type_add_interface_static (my_type, MODEST_TYPE_ZOOMABLE,
 207                         &modest_zoomable_info);
 208                 g_type_add_interface_static (my_type, MODEST_TYPE_ISEARCH_VIEW,
 209                         &modest_isearch_view_info);
 210         }
 211         return my_type;
 212 }
 213
 214 static void
 215 modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass)
 216 {
 217         GObjectClass *gobject_class;
 218         GtkBindingSet *binding_set;
 219
 220         gobject_class = (GObjectClass*) klass;
 221
 222         parent_class            = g_type_class_peek_parent (klass);
 223         gobject_class->dispose = modest_gtkhtml_mime_part_view_dispose;
 224         gobject_class->finalize = modest_gtkhtml_mime_part_view_finalize;
 225
 226         klass->get_part_func = modest_gtkhtml_mime_part_view_get_part_default;
 227         klass->set_part_func = modest_gtkhtml_mime_part_view_set_part_default;
 228         klass->clear_func = modest_gtkhtml_mime_part_view_clear_default;
 229         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty_default;
 230         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images_default;
 231         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images_default;
 232         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images_default;
 233         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom_default;
 234         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom_default;
 235         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus_default;
 236         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus_default;
 237         klass->search_func = modest_gtkhtml_mime_part_view_search_default;
 238         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next_default;
 239         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area_default;
 240
 241         binding_set = gtk_binding_set_by_class (klass);
 242         gtk_binding_entry_skip (binding_set, GDK_Down, 0);
 243         gtk_binding_entry_skip (binding_set, GDK_Up, 0);
 244         gtk_binding_entry_skip (binding_set, GDK_KP_Up, 0);
 245         gtk_binding_entry_skip (binding_set, GDK_KP_Down, 0);
 246         gtk_binding_entry_skip (binding_set, GDK_Page_Down, 0);
 247         gtk_binding_entry_skip (binding_set, GDK_Page_Up, 0);
 248         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Up, 0);
 249         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Down, 0);
 250         gtk_binding_entry_skip (binding_set, GDK_Home, 0);
 251         gtk_binding_entry_skip (binding_set, GDK_End, 0);
 252         gtk_binding_entry_skip (binding_set, GDK_KP_Home, 0);
 253         gtk_binding_entry_skip (binding_set, GDK_KP_End, 0);
 254
 255         g_type_class_add_private (gobject_class, sizeof(ModestGtkhtmlMimePartViewPrivate));
 256
 257         signals[STOP_STREAMS_SIGNAL] =
 258                 g_signal_new ("stop-streams",
 259                               G_TYPE_FROM_CLASS (gobject_class),
 260                               G_SIGNAL_RUN_FIRST,
 261                               G_STRUCT_OFFSET (ModestGtkhtmlMimePartViewClass,stop_streams),
 262                               NULL, NULL,
 263                               g_cclosure_marshal_VOID__VOID,
 264                               G_TYPE_NONE, 0);
 265
 266 }
 267
 268 static void
 269 modest_gtkhtml_mime_part_view_init (ModestGtkhtmlMimePartView *self)
 270 {
 271         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 272         GdkColor base;
 273         GdkColor text;
 274
 275         gtk_html_set_editable        (GTK_HTML(self), FALSE);
 276         gtk_html_allow_selection     (GTK_HTML(self), TRUE);
 277         gtk_html_set_caret_mode      (GTK_HTML(self), FALSE);
 278         gtk_html_set_blocking        (GTK_HTML(self), TRUE);
 279         gtk_html_set_images_blocking (GTK_HTML(self), TRUE);
 280         gtk_container_set_border_width (GTK_CONTAINER (self), MODEST_MARGIN_DEFAULT);
 281
 282         gdk_color_parse ("#fff", &base);
 283         gdk_color_parse ("#000", &text);
 284         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 285         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 286
 287         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 288                                                        G_OBJECT(self), "link_clicked",
 289                                                        G_CALLBACK(on_link_clicked), self);
 290         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 291                                                        G_OBJECT(self), "url_requested",
 292                                                        G_CALLBACK(on_url_requested), self);
 293         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 294                                                        G_OBJECT(self), "on_url",
 295                                                        G_CALLBACK(on_url), self);
 296         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 297                                                        G_OBJECT(self), "notify::style",
 298                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 299
 300         priv->part = NULL;
 301         priv->current_zoom = 1.0;
 302         priv->view_images = FALSE;
 303         priv->has_external_images = FALSE;
 304 }
 305
 306 static void
 307 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 308 {
 309         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 310
 311         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 312         priv->sighandlers = NULL;
 313
 314         G_OBJECT_CLASS (parent_class)->finalize (obj);
 315 }
 316
 317 static void
 318 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 319 {
 320         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 321
 322         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 323
 324         if (priv->part) {
 325                 g_object_unref (priv->part);
 326                 priv->part = NULL;
 327         }
 328
 329         G_OBJECT_CLASS (parent_class)->dispose (obj);
 330 }
 331
 332 /* GTKHTML SIGNALS HANDLERS */
 333
 334 static void
 335 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 336 {
 337         if (strcmp ("style", spec->name) == 0) {
 338                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 339                                  g_object_ref (obj), g_object_unref);
 340                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 341         }
 342 }
 343
 344 gboolean
 345 same_color (GdkColor *a, GdkColor *b)
 346 {
 347         return ((a->red == b->red) &&
 348                 (a->green == b->green) &&
 349                 (a->blue == b->blue));
 350 }
 351
 352 static gboolean
 353 update_style (ModestGtkhtmlMimePartView *self)
 354 {
 355         GdkColor base;
 356         GdkColor text;
 357         GtkRcStyle *rc_style;
 358
 359         gdk_threads_enter ();
 360
 361         if (GTK_WIDGET_VISIBLE (self)) {
 362                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 363
 364                 gdk_color_parse ("#fff", &base);
 365                 gdk_color_parse ("#000", &text);
 366
 367                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 368                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 369
 370                         rc_style->base[GTK_STATE_NORMAL] = base;
 371                         rc_style->text[GTK_STATE_NORMAL] = text;
 372                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 373                 }
 374         }
 375
 376         gdk_threads_leave ();
 377
 378         return FALSE;
 379 }
 380
 381
 382
 383 static gboolean
 384 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 385 {
 386         gboolean result;
 387         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 388
 389         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 390         return result;
 391 }
 392
 393 static gboolean
 394 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 395 {
 396         gboolean result;
 397         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 398
 399         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 400         return result;
 401 }
 402
 403 typedef struct {
 404         gpointer buffer;
 405         GtkHTML *html;
 406         GtkHTMLStream *stream;
 407 } ImageFetcherInfo;
 408
 409 static gboolean
 410 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 411                   ModestGtkhtmlMimePartView *self)
 412 {
 413         gboolean result;
 414         TnyStream *tny_stream;
 415         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 416
 417         if (g_str_has_prefix (uri, "http:")) {
 418                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 419
 420                 if (!priv->view_images)
 421                         priv->has_external_images = TRUE;
 422         }
 423
 424         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 425         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 426         g_object_unref (tny_stream);
 427         return result;
 428 }
 429
 430 /* INTERNAL API */
 431 static void
 432 decode_to_stream_cb (TnyMimePart *self,
 433                      gboolean cancelled,
 434                      TnyStream *stream,
 435                      GError *err,
 436                      gpointer user_data)
 437 {
 438         gboolean is_text = GPOINTER_TO_INT (user_data);
 439
 440         if (is_text) {
 441                 tny_stream_write (stream, "\n", 1);
 442                 tny_stream_reset (stream);
 443         }
 444         tny_stream_close (stream);
 445 }
 446
 447 static void
 448 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 449 {
 450         GtkHTMLStream *gtkhtml_stream;
 451         TnyStream *tny_stream;
 452
 453         g_return_if_fail (self);
 454         g_return_if_fail (part);
 455
 456         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 457
 458         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 459
 460         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 461         tny_stream_reset (tny_stream);
 462
 463         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 464                                               tny_stream, decode_to_stream_cb,
 465                                               NULL, GINT_TO_POINTER (FALSE));
 466         g_object_unref (tny_stream);
 467 }
 468
 469 static void
 470 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 471 {
 472         TnyStream* text_to_html_stream, *tny_stream;
 473         GtkHTMLStream *gtkhtml_stream;
 474
 475         g_return_if_fail (self);
 476         g_return_if_fail (part);
 477
 478         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 479
 480         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 481         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 482         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 483         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 484                                                       64*1024);
 485         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 486                                                    640*1024);
 487
 488         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 489                                               text_to_html_stream, decode_to_stream_cb,
 490                                               NULL, GINT_TO_POINTER (TRUE));
 491
 492         g_object_unref (G_OBJECT(text_to_html_stream));
 493         g_object_unref (G_OBJECT(tny_stream));
 494 }
 495
 496 static void
 497 set_empty_part (ModestGtkhtmlMimePartView *self)
 498 {
 499         g_return_if_fail (self);
 500
 501         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 502         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 503 }
 504
 505 static void
 506 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 507 {
 508         ModestGtkhtmlMimePartViewPrivate *priv;
 509
 510         g_return_if_fail (self);
 511
 512         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 513         priv->has_external_images = FALSE;
 514
 515         if (part != priv->part) {
 516                 if (priv->part)
 517                         g_object_unref (G_OBJECT(priv->part));
 518                 if (part)
 519                         g_object_ref   (G_OBJECT(part));
 520                 priv->part = part;
 521         }
 522
 523         if (!part) {
 524                 set_empty_part (self);
 525                 return;
 526         }
 527
 528         if (tny_mime_part_content_type_is (part, "text/html")) {
 529                 set_html_part (self, part);
 530         } else {
 531                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 532                         gchar *header_content_type, *header_content_type_lower;
 533                         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 534                         if (header_content_type) {
 535                                 header_content_type = g_strstrip (header_content_type);
 536                                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 537
 538                                 if (!g_ascii_strcasecmp (header_content_type_lower, "text/html"))
 539                                         set_html_part (self, part);
 540                                 else
 541                                         set_text_part (self, part);
 542
 543                                 g_free (header_content_type_lower);
 544                                 g_free (header_content_type);
 545                         } else {
 546                                 set_text_part (self, part);
 547                         }
 548                 } else {
 549                         set_text_part (self, part);
 550                 }
 551         }
 552
 553 }
 554
 555 static TnyMimePart*
 556 get_part (ModestGtkhtmlMimePartView *self)
 557 {
 558         TnyMimePart *part;
 559
 560         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 561
 562         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 563
 564         if (part)
 565                 g_object_ref (part);
 566
 567         return part;
 568 }
 569
 570 static gboolean
 571 has_contents_receiver (gpointer engine, const gchar *data,
 572                        size_t len, gboolean *has_contents)
 573 {
 574         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 575                 *has_contents = TRUE;
 576                 return FALSE;
 577         }
 578         return TRUE;
 579 }
 580
 581 static gboolean
 582 is_empty   (ModestGtkhtmlMimePartView *self)
 583 {
 584         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 585          * text in the message:
 586          */
 587         gboolean has_contents = FALSE;
 588
 589         gtk_html_export (GTK_HTML (self), "text/plain",
 590                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 591
 592         return !has_contents;
 593 }
 594
 595 static gboolean
 596 get_view_images   (ModestGtkhtmlMimePartView *self)
 597 {
 598         ModestGtkhtmlMimePartViewPrivate *priv;
 599
 600         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 601
 602         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 603         return priv->view_images;
 604 }
 605
 606 static void
 607 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 608 {
 609         ModestGtkhtmlMimePartViewPrivate *priv;
 610
 611         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 612
 613         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 614         priv->view_images = view_images;
 615 }
 616
 617 static gboolean
 618 has_external_images   (ModestGtkhtmlMimePartView *self)
 619 {
 620         ModestGtkhtmlMimePartViewPrivate *priv;
 621
 622         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 623
 624         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 625         return priv->has_external_images;
 626 }
 627
 628 static void
 629 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 630 {
 631         ModestGtkhtmlMimePartViewPrivate *priv;
 632
 633         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 634
 635         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 636         priv->current_zoom = zoom;
 637         gtk_html_set_magnification (GTK_HTML(self), zoom);
 638
 639         gtk_widget_queue_resize (GTK_WIDGET (self));
 640 }
 641
 642 static gdouble
 643 get_zoom (ModestGtkhtmlMimePartView *self)
 644 {
 645         ModestGtkhtmlMimePartViewPrivate *priv;
 646
 647         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 648
 649         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 650
 651         return priv->current_zoom;
 652 }
 653
 654 static gboolean
 655 search (ModestGtkhtmlMimePartView *self,
 656         const gchar *string)
 657 {
 658         return gtk_html_engine_search (GTK_HTML (self),
 659                                        string,
 660                                        FALSE,   /* case sensitive */
 661                                        TRUE,    /* forward */
 662                                        FALSE);  /* regexp */
 663 }
 664
 665 static gboolean
 666 search_next (ModestGtkhtmlMimePartView *self)
 667 {
 668         return gtk_html_engine_search_next (GTK_HTML (self));
 669 }
 670
 671 static gboolean
 672 get_selection_area (ModestGtkhtmlMimePartView *self,
 673                     gint *x, gint *y,
 674                     gint *width, gint *height)
 675 {
 676 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 677         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 678         return TRUE;
 679 #else
 680         return FALSE;
 681 #endif
 682 }
 683
 684
 685 /* TNY MIME PART IMPLEMENTATION */
 686
 687 static void
 688 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 689 {
 690         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 691
 692         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 693         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 694         klass->clear = modest_gtkhtml_mime_part_view_clear;
 695
 696         return;
 697 }
 698
 699 static TnyMimePart*
 700 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 701 {
 702         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 703 }
 704
 705
 706 static TnyMimePart*
 707 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 708 {
 709         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 710 }
 711
 712 static void
 713 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 714                                         TnyMimePart *part)
 715 {
 716         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 717 }
 718
 719 static void
 720 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 721                                                 TnyMimePart *part)
 722 {
 723         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 724
 725         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 726 }
 727
 728 static void
 729 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 730 {
 731         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 732 }
 733
 734 static void
 735 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 736 {
 737         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 738 }
 739
 740 /* MODEST MIME PART VIEW IMPLEMENTATION */
 741
 742 static void
 743 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 744 {
 745         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 746
 747         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 748         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 749         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 750         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 751
 752         return;
 753 }
 754
 755 static gboolean
 756 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 757 {
 758         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 759 }
 760
 761 static gboolean
 762 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 763 {
 764         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 765 }
 766
 767 static void
 768 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 769 {
 770         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 771 }
 772
 773 static gboolean
 774 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 775 {
 776         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 777 }
 778
 779 static gboolean
 780 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 781 {
 782         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 783 }
 784
 785 static gboolean
 786 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 787 {
 788         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 789 }
 790
 791 static void
 792 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 793 {
 794         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 795 }
 796
 797 static gboolean
 798 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 799 {
 800         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 801 }
 802
 803
 804 /* MODEST ZOOMABLE IMPLEMENTATION */
 805 static void
 806 modest_zoomable_init (gpointer g, gpointer iface_data)
 807 {
 808         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 809
 810         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 811         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 812         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 813         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 814
 815         return;
 816 }
 817
 818 static gdouble
 819 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 820 {
 821         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 822 }
 823
 824 static gdouble
 825 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 826 {
 827         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 828 }
 829
 830 static void
 831 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 832 {
 833         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 834 }
 835
 836 static void
 837 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 838 {
 839         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 840 }
 841
 842 static gboolean
 843 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 844 {
 845         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 846 }
 847
 848 static gboolean
 849 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 850 {
 851         /* operation not supported in ModestGtkhtmlMimePartView */
 852         return FALSE;
 853 }
 854
 855 static gboolean
 856 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 857 {
 858         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 859 }
 860
 861 static gboolean
 862 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 863 {
 864         /* operation not supported in ModestGtkhtmlMimePartView */
 865         return FALSE;
 866 }
 867
 868 /* ISEARCH VIEW IMPLEMENTATION */
 869 static void
 870 modest_isearch_view_init (gpointer g, gpointer iface_data)
 871 {
 872         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 873
 874         klass->search_func = modest_gtkhtml_mime_part_view_search;
 875         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 876         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 877
 878         return;
 879 }
 880
 881 static gboolean
 882 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 883 {
 884         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 885 }
 886
 887 static gboolean
 888 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 889 {
 890         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 891 }
 892
 893 static gboolean
 894 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 895 {
 896         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 897 }
 898
 899 static gboolean
 900 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 901 {
 902         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 903 }
 904
 905 static gboolean
 906 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 907                                                   gint *width, gint *height)
 908 {
 909         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 910 }
 911
 912 static gboolean
 913 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 914                                                           gint *width, gint *height)
 915 {
 916         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 917 }