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         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 #ifdef MODEST_TOOLKIT_HILDON2
 283 #ifdef HAVE_GTK_HTML_SET_MAX_IMAGE_SIZE
 284         /* We set a maximum width of a bit less than the width of the screen, and a
 285            maximum height of 2 times the full size of the window. Should be enough */
 286         gtk_html_set_max_image_size (GTK_HTML (self), 720, 880);
 287 #endif
 288 #endif
 289
 290         gdk_color_parse ("#fff", &base);
 291         gdk_color_parse ("#000", &text);
 292         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 293         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 294
 295         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 296                                                        G_OBJECT(self), "link_clicked",
 297                                                        G_CALLBACK(on_link_clicked), self);
 298         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 299                                                        G_OBJECT(self), "url_requested",
 300                                                        G_CALLBACK(on_url_requested), self);
 301         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 302                                                        G_OBJECT(self), "on_url",
 303                                                        G_CALLBACK(on_url), self);
 304         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 305                                                        G_OBJECT(self), "notify::style",
 306                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 307
 308         priv->part = NULL;
 309         priv->current_zoom = 1.0;
 310         priv->view_images = FALSE;
 311         priv->has_external_images = FALSE;
 312 }
 313
 314 static void
 315 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 316 {
 317         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 318
 319         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 320         priv->sighandlers = NULL;
 321
 322         G_OBJECT_CLASS (parent_class)->finalize (obj);
 323 }
 324
 325 static void
 326 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 327 {
 328         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 329
 330         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 331
 332         if (priv->part) {
 333                 g_object_unref (priv->part);
 334                 priv->part = NULL;
 335         }
 336
 337         G_OBJECT_CLASS (parent_class)->dispose (obj);
 338 }
 339
 340 /* GTKHTML SIGNALS HANDLERS */
 341
 342 static void
 343 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 344 {
 345         if (strcmp ("style", spec->name) == 0) {
 346                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 347                                  g_object_ref (obj), g_object_unref);
 348                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 349         }
 350 }
 351
 352 gboolean
 353 same_color (GdkColor *a, GdkColor *b)
 354 {
 355         return ((a->red == b->red) &&
 356                 (a->green == b->green) &&
 357                 (a->blue == b->blue));
 358 }
 359
 360 static gboolean
 361 update_style (ModestGtkhtmlMimePartView *self)
 362 {
 363         GdkColor base;
 364         GdkColor text;
 365         GtkRcStyle *rc_style;
 366
 367         gdk_threads_enter ();
 368
 369         if (GTK_WIDGET_VISIBLE (self)) {
 370                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 371
 372                 gdk_color_parse ("#fff", &base);
 373                 gdk_color_parse ("#000", &text);
 374
 375                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 376                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 377
 378                         rc_style->base[GTK_STATE_NORMAL] = base;
 379                         rc_style->text[GTK_STATE_NORMAL] = text;
 380                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 381                 }
 382         }
 383
 384         gdk_threads_leave ();
 385
 386         return FALSE;
 387 }
 388
 389
 390
 391 static gboolean
 392 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 393 {
 394         gboolean result;
 395         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 396
 397         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 398         return result;
 399 }
 400
 401 static gboolean
 402 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 403 {
 404         gboolean result;
 405         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 406
 407         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 408         return result;
 409 }
 410
 411 typedef struct {
 412         gpointer buffer;
 413         GtkHTML *html;
 414         GtkHTMLStream *stream;
 415 } ImageFetcherInfo;
 416
 417 static gboolean
 418 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 419                   ModestGtkhtmlMimePartView *self)
 420 {
 421         gboolean result;
 422         TnyStream *tny_stream;
 423         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 424
 425         if (g_str_has_prefix (uri, "http:")) {
 426                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 427
 428                 if (!priv->view_images)
 429                         priv->has_external_images = TRUE;
 430         }
 431
 432         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 433         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 434         g_object_unref (tny_stream);
 435         return result;
 436 }
 437
 438 /* INTERNAL API */
 439 static void
 440 decode_to_stream_cb (TnyMimePart *self,
 441                      gboolean cancelled,
 442                      TnyStream *stream,
 443                      GError *err,
 444                      gpointer user_data)
 445 {
 446         gboolean is_text = GPOINTER_TO_INT (user_data);
 447
 448         if (is_text) {
 449                 if (tny_stream_write (stream, "\n", 1) == -1) {
 450                         g_warning ("failed to write CR in %s", __FUNCTION__);
 451                 }
 452                 tny_stream_reset (stream);
 453         }
 454         tny_stream_close (stream);
 455 }
 456
 457 static void
 458 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding)
 459 {
 460         GtkHTMLStream *gtkhtml_stream;
 461         TnyStream *tny_stream;
 462
 463         g_return_if_fail (self);
 464         g_return_if_fail (part);
 465
 466         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 467
 468         gtkhtml_stream = gtk_html_begin_full(GTK_HTML(self), NULL, (char *) encoding, 0);
 469
 470         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 471         tny_stream_reset (tny_stream);
 472
 473         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 474                                               tny_stream, decode_to_stream_cb,
 475                                               NULL, GINT_TO_POINTER (FALSE));
 476         g_object_unref (tny_stream);
 477 }
 478
 479 static void
 480 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 481 {
 482         TnyStream* text_to_html_stream, *tny_stream;
 483         GtkHTMLStream *gtkhtml_stream;
 484
 485         g_return_if_fail (self);
 486         g_return_if_fail (part);
 487
 488         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 489
 490         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 491         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 492         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 493         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 494                                                       64*1024);
 495         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 496                                                    640*1024);
 497
 498         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 499                                               text_to_html_stream, decode_to_stream_cb,
 500                                               NULL, GINT_TO_POINTER (TRUE));
 501
 502         g_object_unref (G_OBJECT(text_to_html_stream));
 503         g_object_unref (G_OBJECT(tny_stream));
 504 }
 505
 506 static void
 507 set_empty_part (ModestGtkhtmlMimePartView *self)
 508 {
 509         g_return_if_fail (self);
 510
 511         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 512         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 513 }
 514
 515 static void
 516 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 517 {
 518         ModestGtkhtmlMimePartViewPrivate *priv;
 519         gchar *header_content_type, *header_content_type_lower;
 520         const gchar *tmp;
 521         gchar *charset = NULL;
 522
 523         g_return_if_fail (self);
 524
 525         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 526         priv->has_external_images = FALSE;
 527
 528         if (part != priv->part) {
 529                 if (priv->part)
 530                         g_object_unref (G_OBJECT(priv->part));
 531                 if (part)
 532                         g_object_ref   (G_OBJECT(part));
 533                 priv->part = part;
 534         }
 535
 536         if (!part) {
 537                 set_empty_part (self);
 538                 return;
 539         }
 540
 541         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 542         header_content_type = g_strstrip (header_content_type);
 543         header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 544
 545         if (header_content_type_lower) {
 546                 tmp = strstr (header_content_type_lower, "charset=");
 547                 if (tmp) {
 548                         const gchar *tmp2;
 549                         tmp = tmp + strlen ("charset=");
 550
 551                         tmp2 = strstr (tmp, ";");
 552                         if (tmp2) {
 553                                 charset = g_strndup (tmp, tmp2-tmp);
 554                         } else {
 555                                 charset = g_strdup (tmp);
 556                         }
 557                 }
 558         }
 559
 560         if (tny_mime_part_content_type_is (part, "text/html")) {
 561                 set_html_part (self, part, charset);
 562         } else {
 563                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 564                         if (header_content_type) {
 565                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 566                                         set_html_part (self, part, charset);
 567                                 else
 568                                         set_text_part (self, part);
 569
 570                         } else {
 571                                 set_text_part (self, part);
 572                         }
 573                 } else {
 574                         set_text_part (self, part);
 575                 }
 576         }
 577         g_free (header_content_type_lower);
 578         g_free (header_content_type);
 579
 580 }
 581
 582 static TnyMimePart*
 583 get_part (ModestGtkhtmlMimePartView *self)
 584 {
 585         TnyMimePart *part;
 586
 587         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 588
 589         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 590
 591         if (part)
 592                 g_object_ref (part);
 593
 594         return part;
 595 }
 596
 597 static gboolean
 598 has_contents_receiver (gpointer engine, const gchar *data,
 599                        size_t len, gboolean *has_contents)
 600 {
 601         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 602                 *has_contents = TRUE;
 603                 return FALSE;
 604         }
 605         return TRUE;
 606 }
 607
 608 static gboolean
 609 is_empty   (ModestGtkhtmlMimePartView *self)
 610 {
 611         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 612          * text in the message:
 613          */
 614         gboolean has_contents = FALSE;
 615
 616         gtk_html_export (GTK_HTML (self), "text/plain",
 617                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 618
 619         return !has_contents;
 620 }
 621
 622 static gboolean
 623 get_view_images   (ModestGtkhtmlMimePartView *self)
 624 {
 625         ModestGtkhtmlMimePartViewPrivate *priv;
 626
 627         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 628
 629         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 630         return priv->view_images;
 631 }
 632
 633 static void
 634 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 635 {
 636         ModestGtkhtmlMimePartViewPrivate *priv;
 637
 638         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 639
 640         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 641         priv->view_images = view_images;
 642 }
 643
 644 static gboolean
 645 has_external_images   (ModestGtkhtmlMimePartView *self)
 646 {
 647         ModestGtkhtmlMimePartViewPrivate *priv;
 648
 649         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 650
 651         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 652         return priv->has_external_images;
 653 }
 654
 655 static void
 656 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 657 {
 658         ModestGtkhtmlMimePartViewPrivate *priv;
 659
 660         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 661
 662         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 663         priv->current_zoom = zoom;
 664         gtk_html_set_magnification (GTK_HTML(self), zoom);
 665
 666         gtk_widget_queue_resize (GTK_WIDGET (self));
 667 }
 668
 669 static gdouble
 670 get_zoom (ModestGtkhtmlMimePartView *self)
 671 {
 672         ModestGtkhtmlMimePartViewPrivate *priv;
 673
 674         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 675
 676         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 677
 678         return priv->current_zoom;
 679 }
 680
 681 static gboolean
 682 search (ModestGtkhtmlMimePartView *self,
 683         const gchar *string)
 684 {
 685         return gtk_html_engine_search (GTK_HTML (self),
 686                                        string,
 687                                        FALSE,   /* case sensitive */
 688                                        TRUE,    /* forward */
 689                                        FALSE);  /* regexp */
 690 }
 691
 692 static gboolean
 693 search_next (ModestGtkhtmlMimePartView *self)
 694 {
 695         return gtk_html_engine_search_next (GTK_HTML (self));
 696 }
 697
 698 static gboolean
 699 get_selection_area (ModestGtkhtmlMimePartView *self,
 700                     gint *x, gint *y,
 701                     gint *width, gint *height)
 702 {
 703 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 704         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 705         return TRUE;
 706 #else
 707         return FALSE;
 708 #endif
 709 }
 710
 711
 712 /* TNY MIME PART IMPLEMENTATION */
 713
 714 static void
 715 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 716 {
 717         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 718
 719         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 720         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 721         klass->clear = modest_gtkhtml_mime_part_view_clear;
 722
 723         return;
 724 }
 725
 726 static TnyMimePart*
 727 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 728 {
 729         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 730 }
 731
 732
 733 static TnyMimePart*
 734 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 735 {
 736         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 737 }
 738
 739 static void
 740 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 741                                         TnyMimePart *part)
 742 {
 743         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 744 }
 745
 746 static void
 747 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 748                                                 TnyMimePart *part)
 749 {
 750         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 751
 752         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 753 }
 754
 755 static void
 756 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 757 {
 758         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 759 }
 760
 761 static void
 762 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 763 {
 764         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 765 }
 766
 767 /* MODEST MIME PART VIEW IMPLEMENTATION */
 768
 769 static void
 770 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 771 {
 772         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 773
 774         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 775         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 776         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 777         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 778
 779         return;
 780 }
 781
 782 static gboolean
 783 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 784 {
 785         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 786 }
 787
 788 static gboolean
 789 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 790 {
 791         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 792 }
 793
 794 static void
 795 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 796 {
 797         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 798 }
 799
 800 static gboolean
 801 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 802 {
 803         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 804 }
 805
 806 static gboolean
 807 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 808 {
 809         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 810 }
 811
 812 static gboolean
 813 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 814 {
 815         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 816 }
 817
 818 static void
 819 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 820 {
 821         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 822 }
 823
 824 static gboolean
 825 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 826 {
 827         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 828 }
 829
 830
 831 /* MODEST ZOOMABLE IMPLEMENTATION */
 832 static void
 833 modest_zoomable_init (gpointer g, gpointer iface_data)
 834 {
 835         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 836
 837         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 838         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 839         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 840         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 841
 842         return;
 843 }
 844
 845 static gdouble
 846 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 847 {
 848         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 849 }
 850
 851 static gdouble
 852 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 853 {
 854         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 855 }
 856
 857 static void
 858 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 859 {
 860         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 861 }
 862
 863 static void
 864 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 865 {
 866         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 867 }
 868
 869 static gboolean
 870 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 871 {
 872         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 873 }
 874
 875 static gboolean
 876 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 877 {
 878         /* operation not supported in ModestGtkhtmlMimePartView */
 879         return FALSE;
 880 }
 881
 882 static gboolean
 883 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 884 {
 885         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 886 }
 887
 888 static gboolean
 889 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 890 {
 891         /* operation not supported in ModestGtkhtmlMimePartView */
 892         return FALSE;
 893 }
 894
 895 /* ISEARCH VIEW IMPLEMENTATION */
 896 static void
 897 modest_isearch_view_init (gpointer g, gpointer iface_data)
 898 {
 899         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 900
 901         klass->search_func = modest_gtkhtml_mime_part_view_search;
 902         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 903         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 904
 905         return;
 906 }
 907
 908 static gboolean
 909 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 910 {
 911         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 912 }
 913
 914 static gboolean
 915 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 916 {
 917         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 918 }
 919
 920 static gboolean
 921 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 922 {
 923         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 924 }
 925
 926 static gboolean
 927 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 928 {
 929         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 930 }
 931
 932 static gboolean
 933 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 934                                                   gint *width, gint *height)
 935 {
 936         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 937 }
 938
 939 static gboolean
 940 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 941                                                           gint *width, gint *height)
 942 {
 943         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 944 }