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

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