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 #ifndef MODEST_TOOLKIT_GTK
 294         gtk_html_set_auto_panning    (GTK_HTML (self), TRUE);
 295 #endif
 296 #endif
 297
 298 #ifdef MODEST_TOOLKIT_HILDON2
 299 #ifdef HAVE_GTK_HTML_SET_MAX_IMAGE_SIZE
 300         /* We set a maximum width of a bit less than the width of the screen, and a
 301            maximum height of 2 times the full size of the window. Should be enough */
 302         gtk_html_set_max_image_size (GTK_HTML (self), 720, 880);
 303 #endif
 304 #ifdef HAVE_GTK_HTML_SET_ALLOW_DND
 305         gtk_html_set_allow_dnd       (GTK_HTML(self), FALSE);
 306 #endif
 307 #ifdef HAVE_GTK_HTML_SET_WORD_CHAR_WRAPPING
 308         gtk_html_set_word_char_wrapping (GTK_HTML (self), TRUE);
 309 #endif
 310 #endif
 311
 312 #ifdef HAVE_GTK_HTML_SET_DEFAULT_ENGINE
 313         /* Enable Content type handling */
 314         gtk_html_set_default_engine (GTK_HTML (self), TRUE);
 315 #endif
 316
 317         gdk_color_parse ("#fff", &base);
 318         gdk_color_parse ("#000", &text);
 319         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 320         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 321
 322         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 323                                                        G_OBJECT(self), "link_clicked",
 324                                                        G_CALLBACK(on_link_clicked), self);
 325         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 326                                                        G_OBJECT(self), "url_requested",
 327                                                        G_CALLBACK(on_url_requested), self);
 328         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 329                                                        G_OBJECT(self), "on_url",
 330                                                        G_CALLBACK(on_url), self);
 331         priv->sighandlers = modest_signal_mgr_connect (priv->sighandlers,
 332                                                        G_OBJECT(self), "notify::style",
 333                                                        G_CALLBACK (on_notify_style), (gpointer) self);
 334
 335         priv->part = NULL;
 336         priv->current_zoom = 1.0;
 337         priv->view_images = FALSE;
 338         priv->has_external_images = FALSE;
 339 }
 340
 341 static void
 342 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 343 {
 344         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 345
 346         modest_signal_mgr_disconnect_all_and_destroy (priv->sighandlers);
 347         priv->sighandlers = NULL;
 348
 349         G_OBJECT_CLASS (parent_class)->finalize (obj);
 350 }
 351
 352 static void
 353 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 354 {
 355         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 356
 357         g_signal_emit (G_OBJECT (obj), signals[STOP_STREAMS_SIGNAL], 0);
 358
 359         if (priv->part) {
 360                 g_object_unref (priv->part);
 361                 priv->part = NULL;
 362         }
 363
 364         G_OBJECT_CLASS (parent_class)->dispose (obj);
 365 }
 366
 367 /* GTKHTML SIGNALS HANDLERS */
 368
 369 static void
 370 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 371 {
 372         if (strcmp ("style", spec->name) == 0) {
 373                 g_idle_add_full (G_PRIORITY_DEFAULT, (GSourceFunc) update_style,
 374                                  g_object_ref (obj), g_object_unref);
 375                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 376         }
 377 }
 378
 379 gboolean
 380 same_color (GdkColor *a, GdkColor *b)
 381 {
 382         return ((a->red == b->red) &&
 383                 (a->green == b->green) &&
 384                 (a->blue == b->blue));
 385 }
 386
 387 static gboolean
 388 update_style (ModestGtkhtmlMimePartView *self)
 389 {
 390         GdkColor base;
 391         GdkColor text;
 392         GtkRcStyle *rc_style;
 393
 394         gdk_threads_enter ();
 395
 396         if (GTK_WIDGET_VISIBLE (self)) {
 397                 rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 398
 399                 gdk_color_parse ("#fff", &base);
 400                 gdk_color_parse ("#000", &text);
 401
 402                 if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 403                     !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 404
 405                         rc_style->base[GTK_STATE_NORMAL] = base;
 406                         rc_style->text[GTK_STATE_NORMAL] = text;
 407                         gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 408                 }
 409         }
 410
 411         gdk_threads_leave ();
 412
 413         return FALSE;
 414 }
 415
 416
 417
 418 static gboolean
 419 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 420 {
 421         gboolean result;
 422         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 423
 424         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 425         return result;
 426 }
 427
 428 static gboolean
 429 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 430 {
 431         gboolean result;
 432         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 433
 434         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 435         return result;
 436 }
 437
 438 static gboolean
 439 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 440                   ModestGtkhtmlMimePartView *self)
 441 {
 442         gboolean result;
 443         TnyStream *tny_stream;
 444         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 445
 446         if (g_str_has_prefix (uri, "http:")) {
 447                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 448
 449                 if (!priv->view_images)
 450                         priv->has_external_images = TRUE;
 451         }
 452
 453         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 454         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 455         g_object_unref (tny_stream);
 456         return result;
 457 }
 458
 459 /* INTERNAL API */
 460 static void
 461 decode_to_stream_cb (TnyMimePart *self,
 462                      gboolean cancelled,
 463                      TnyStream *stream,
 464                      GError *err,
 465                      gpointer user_data)
 466 {
 467         ModestGtkhtmlMimePartView *view = (ModestGtkhtmlMimePartView *) user_data;
 468
 469         if (MODEST_IS_STREAM_TEXT_TO_HTML (stream)) {
 470                 if (tny_stream_write (stream, "\n", 1) == -1) {
 471                         g_warning ("failed to write CR in %s", __FUNCTION__);
 472                 }
 473                 if (modest_stream_text_to_html_limit_reached (MODEST_STREAM_TEXT_TO_HTML (stream))) {
 474                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 475                 }
 476                 tny_stream_reset (stream);
 477         } else {
 478                 if (modest_tny_stream_gtkhtml_limit_reached (MODEST_TNY_STREAM_GTKHTML (stream))) {
 479                         g_signal_emit (G_OBJECT (view), signals[LIMIT_ERROR_SIGNAL], 0);
 480                 }
 481         }
 482         tny_stream_close (stream);
 483 }
 484
 485 static void
 486 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part, const gchar *encoding)
 487 {
 488         GtkHTMLStream *gtkhtml_stream;
 489         TnyStream *tny_stream;
 490         gchar *content_type;
 491
 492         g_return_if_fail (self);
 493         g_return_if_fail (part);
 494
 495         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 496
 497         content_type = g_strdup_printf ("text/html; charset=%s", encoding);
 498         gtkhtml_stream = gtk_html_begin_full(GTK_HTML(self), NULL, content_type, 0);
 499         g_free (content_type);
 500
 501         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 502         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 503         tny_stream_reset (tny_stream);
 504
 505         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 506                                               tny_stream, decode_to_stream_cb,
 507                                               NULL, self);
 508         g_object_unref (tny_stream);
 509 }
 510
 511 static void
 512 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 513 {
 514         TnyStream* text_to_html_stream, *tny_stream;
 515         GtkHTMLStream *gtkhtml_stream;
 516
 517         g_return_if_fail (self);
 518         g_return_if_fail (part);
 519
 520         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 521
 522         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 523         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 524         modest_tny_stream_gtkhtml_set_max_size (MODEST_TNY_STREAM_GTKHTML (tny_stream), 128*1024);
 525         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 526         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 527                                                       64*1024);
 528         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 529                                                    128*1024);
 530         modest_stream_text_to_html_set_line_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream),
 531                                                    1024);
 532
 533         tny_mime_part_decode_to_stream_async (TNY_MIME_PART (part),
 534                                               text_to_html_stream, decode_to_stream_cb,
 535                                               NULL, self);
 536
 537         g_object_unref (G_OBJECT(text_to_html_stream));
 538         g_object_unref (G_OBJECT(tny_stream));
 539 }
 540
 541 static void
 542 set_empty_part (ModestGtkhtmlMimePartView *self)
 543 {
 544         g_return_if_fail (self);
 545
 546         g_signal_emit (G_OBJECT (self), signals[STOP_STREAMS_SIGNAL], 0);
 547         gtk_html_load_from_string (GTK_HTML(self), "", 1);
 548 }
 549
 550 static void
 551 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 552 {
 553         ModestGtkhtmlMimePartViewPrivate *priv;
 554         gchar *header_content_type, *header_content_type_lower;
 555         const gchar *tmp;
 556         gchar *charset = NULL;
 557
 558         g_return_if_fail (self);
 559
 560         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 561         priv->has_external_images = FALSE;
 562
 563         if (part != priv->part) {
 564                 if (priv->part)
 565                         g_object_unref (G_OBJECT(priv->part));
 566                 if (part)
 567                         g_object_ref   (G_OBJECT(part));
 568                 priv->part = part;
 569         }
 570
 571         if (!part) {
 572                 set_empty_part (self);
 573                 return;
 574         }
 575
 576         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 577         if (header_content_type) {
 578                 header_content_type = g_strstrip (header_content_type);
 579                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 580         } else {
 581                 header_content_type_lower = NULL;
 582         }
 583
 584         if (header_content_type_lower) {
 585                 tmp = strstr (header_content_type_lower, "charset=");
 586                 if (tmp) {
 587                         const gchar *tmp2;
 588                         tmp = tmp + strlen ("charset=");
 589
 590                         tmp2 = strstr (tmp, ";");
 591                         if (tmp2) {
 592                                 charset = g_strndup (tmp, tmp2-tmp);
 593                         } else {
 594                                 charset = g_strdup (tmp);
 595                         }
 596                 }
 597         }
 598
 599         if (tny_mime_part_content_type_is (part, "text/html")) {
 600                 set_html_part (self, part, charset);
 601         } else {
 602                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 603                         if (header_content_type) {
 604                                 if (g_str_has_prefix (header_content_type_lower, "text/html"))
 605                                         set_html_part (self, part, charset);
 606                                 else
 607                                         set_text_part (self, part);
 608
 609                         } else {
 610                                 set_text_part (self, part);
 611                         }
 612                 } else {
 613                         set_text_part (self, part);
 614                 }
 615         }
 616         g_free (header_content_type_lower);
 617         g_free (header_content_type);
 618
 619 }
 620
 621 static TnyMimePart*
 622 get_part (ModestGtkhtmlMimePartView *self)
 623 {
 624         TnyMimePart *part;
 625
 626         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 627
 628         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 629
 630         if (part)
 631                 g_object_ref (part);
 632
 633         return part;
 634 }
 635
 636 static gboolean
 637 has_contents_receiver (gpointer engine, const gchar *data,
 638                        size_t len, gboolean *has_contents)
 639 {
 640         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 641                 *has_contents = TRUE;
 642                 return FALSE;
 643         }
 644         return TRUE;
 645 }
 646
 647 static gboolean
 648 is_empty   (ModestGtkhtmlMimePartView *self)
 649 {
 650         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 651          * text in the message:
 652          */
 653         gboolean has_contents = FALSE;
 654
 655         gtk_html_export (GTK_HTML (self), "text/plain",
 656                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 657
 658         return !has_contents;
 659 }
 660
 661 static gboolean
 662 get_view_images   (ModestGtkhtmlMimePartView *self)
 663 {
 664         ModestGtkhtmlMimePartViewPrivate *priv;
 665
 666         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 667
 668         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 669         return priv->view_images;
 670 }
 671
 672 static void
 673 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 674 {
 675         ModestGtkhtmlMimePartViewPrivate *priv;
 676
 677         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 678
 679         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 680         priv->view_images = view_images;
 681 }
 682
 683 static gboolean
 684 has_external_images   (ModestGtkhtmlMimePartView *self)
 685 {
 686         ModestGtkhtmlMimePartViewPrivate *priv;
 687
 688         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 689
 690         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 691         return priv->has_external_images;
 692 }
 693
 694 static void
 695 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 696 {
 697         ModestGtkhtmlMimePartViewPrivate *priv;
 698
 699         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 700
 701         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 702         priv->current_zoom = zoom;
 703         gtk_html_set_magnification (GTK_HTML(self), zoom);
 704
 705         gtk_widget_queue_resize (GTK_WIDGET (self));
 706 }
 707
 708 static gdouble
 709 get_zoom (ModestGtkhtmlMimePartView *self)
 710 {
 711         ModestGtkhtmlMimePartViewPrivate *priv;
 712
 713         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 714
 715         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 716
 717         return priv->current_zoom;
 718 }
 719
 720 static gboolean
 721 search (ModestGtkhtmlMimePartView *self,
 722         const gchar *string)
 723 {
 724         return gtk_html_engine_search (GTK_HTML (self),
 725                                        string,
 726                                        FALSE,   /* case sensitive */
 727                                        TRUE,    /* forward */
 728                                        FALSE);  /* regexp */
 729 }
 730
 731 static gboolean
 732 search_next (ModestGtkhtmlMimePartView *self)
 733 {
 734         return gtk_html_engine_search_next (GTK_HTML (self));
 735 }
 736
 737 static gboolean
 738 get_selection_area (ModestGtkhtmlMimePartView *self,
 739                     gint *x, gint *y,
 740                     gint *width, gint *height)
 741 {
 742 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 743         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 744         return TRUE;
 745 #else
 746         return FALSE;
 747 #endif
 748 }
 749
 750
 751 /* TNY MIME PART IMPLEMENTATION */
 752
 753 static void
 754 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 755 {
 756         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 757
 758         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 759         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 760         klass->clear = modest_gtkhtml_mime_part_view_clear;
 761
 762         return;
 763 }
 764
 765 static TnyMimePart*
 766 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 767 {
 768         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 769 }
 770
 771
 772 static TnyMimePart*
 773 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 774 {
 775         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 776 }
 777
 778 static void
 779 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 780                                         TnyMimePart *part)
 781 {
 782         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 783 }
 784
 785 static void
 786 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 787                                                 TnyMimePart *part)
 788 {
 789         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 790
 791         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 792 }
 793
 794 static void
 795 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 796 {
 797         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 798 }
 799
 800 static void
 801 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 802 {
 803         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 804 }
 805
 806 /* MODEST MIME PART VIEW IMPLEMENTATION */
 807
 808 static void
 809 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 810 {
 811         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 812
 813         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 814         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 815         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 816         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 817
 818         return;
 819 }
 820
 821 static gboolean
 822 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 823 {
 824         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 825 }
 826
 827 static gboolean
 828 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 829 {
 830         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 831 }
 832
 833 static void
 834 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 835 {
 836         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 837 }
 838
 839 static gboolean
 840 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 841 {
 842         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 843 }
 844
 845 static gboolean
 846 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 847 {
 848         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 849 }
 850
 851 static gboolean
 852 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 853 {
 854         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 855 }
 856
 857 static void
 858 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 859 {
 860         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 861 }
 862
 863 static gboolean
 864 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 865 {
 866         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 867 }
 868
 869
 870 /* MODEST ZOOMABLE IMPLEMENTATION */
 871 static void
 872 modest_zoomable_init (gpointer g, gpointer iface_data)
 873 {
 874         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 875
 876         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 877         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 878         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 879         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 880
 881         return;
 882 }
 883
 884 static gdouble
 885 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 886 {
 887         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 888 }
 889
 890 static gdouble
 891 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 892 {
 893         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 894 }
 895
 896 static void
 897 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 898 {
 899         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 900 }
 901
 902 static void
 903 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 904 {
 905         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 906 }
 907
 908 static gboolean
 909 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 910 {
 911         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 912 }
 913
 914 static gboolean
 915 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 916 {
 917         /* operation not supported in ModestGtkhtmlMimePartView */
 918         return FALSE;
 919 }
 920
 921 static gboolean
 922 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 923 {
 924         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 925 }
 926
 927 static gboolean
 928 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 929 {
 930         /* operation not supported in ModestGtkhtmlMimePartView */
 931         return FALSE;
 932 }
 933
 934 /* ISEARCH VIEW IMPLEMENTATION */
 935 static void
 936 modest_isearch_view_init (gpointer g, gpointer iface_data)
 937 {
 938         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 939
 940         klass->search_func = modest_gtkhtml_mime_part_view_search;
 941         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 942         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 943
 944         return;
 945 }
 946
 947 static gboolean
 948 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 949 {
 950         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 951 }
 952
 953 static gboolean
 954 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 955 {
 956         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 957 }
 958
 959 static gboolean
 960 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 961 {
 962         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 963 }
 964
 965 static gboolean
 966 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 967 {
 968         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 969 }
 970
 971 static gboolean
 972 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 973                                                   gint *width, gint *height)
 974 {
 975         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 976 }
 977
 978 static gboolean
 979 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 980                                                           gint *width, gint *height)
 981 {
 982         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 983 }