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

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