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
  48 /* gobject structure methods */
  49 static void    modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass);
  50 static void    tny_mime_part_view_init                  (gpointer g, gpointer iface_data);
  51 static void    modest_mime_part_view_init               (gpointer g, gpointer iface_data);
  52 static void    modest_zoomable_init                     (gpointer g, gpointer iface_data);
  53 static void    modest_isearch_view_init                 (gpointer g, gpointer iface_data);
  54 static void    modest_gtkhtml_mime_part_view_init       (ModestGtkhtmlMimePartView *self);
  55 static void    modest_gtkhtml_mime_part_view_finalize   (GObject *self);
  56 static void    modest_gtkhtml_mime_part_view_dispose    (GObject *self);
  57
  58 /* GtkHTML signal handlers */
  59 static gboolean  on_link_clicked  (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  60 static gboolean  on_url           (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self);
  61 static gboolean  on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
  62                                    ModestGtkhtmlMimePartView *self);
  63 static void      on_notify_style  (GObject *obj, GParamSpec *spec, gpointer userdata);
  64 static gboolean  update_style     (ModestGtkhtmlMimePartView *self);
  65 /* TnyMimePartView implementation */
  66 static void modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self);
  67 static void modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self);
  68 static void modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self, TnyMimePart *part);
  69 static void modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self, TnyMimePart *part);
  70 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self);
  71 static TnyMimePart* modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self);
  72 /* ModestMimePartView implementation */
  73 static gboolean modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self);
  74 static gboolean modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self);
  75 static gboolean modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self);
  76 static gboolean modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self);
  77 static void     modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images);
  78 static void     modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images);
  79 static gboolean modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self);
  80 static gboolean modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self);
  81 /* ModestZoomable implementation */
  82 static gdouble modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self);
  83 static void modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value);
  84 static gboolean modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self);
  85 static gboolean modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self);
  86 static gdouble modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self);
  87 static void modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value);
  88 static gboolean modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self);
  89 static gboolean modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self);
  90 /* ModestISearchView implementation */
  91 static gboolean modest_gtkhtml_mime_part_view_search                    (ModestISearchView *self, const gchar *string);
  92 static gboolean modest_gtkhtml_mime_part_view_search_next               (ModestISearchView *self);
  93 static gboolean modest_gtkhtml_mime_part_view_get_selection_area        (ModestISearchView *self, gint *x, gint *y,
  94                                                                          gint *width, gint *height);
  95 static gboolean modest_gtkhtml_mime_part_view_search_default            (ModestISearchView *self, const gchar *string);
  96 static gboolean modest_gtkhtml_mime_part_view_search_next_default       (ModestISearchView *self);
  97 static gboolean modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
  98                                                                           gint *width, gint *height);
  99
 100
 101 /* internal api */
 102 static TnyMimePart  *get_part   (ModestGtkhtmlMimePartView *self);
 103 static void          set_html_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 104 static void          set_text_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 105 static void          set_empty_part  (ModestGtkhtmlMimePartView *self);
 106 static void          set_part   (ModestGtkhtmlMimePartView *self, TnyMimePart *part);
 107 static gboolean      is_empty   (ModestGtkhtmlMimePartView *self);
 108 static gboolean      get_view_images   (ModestGtkhtmlMimePartView *self);
 109 static void          set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images);
 110 static gboolean      has_external_images   (ModestGtkhtmlMimePartView *self);
 111 static void          set_zoom   (ModestGtkhtmlMimePartView *self, gdouble zoom);
 112 static gdouble       get_zoom   (ModestGtkhtmlMimePartView *self);
 113 static gboolean      has_contents_receiver (gpointer engine, const gchar *data,
 114                                             size_t len, gboolean *has_contents);
 115 static gboolean      search             (ModestGtkhtmlMimePartView *self, const gchar *string);
 116 static gboolean      search_next        (ModestGtkhtmlMimePartView *self);
 117 static gboolean      get_selection_area (ModestGtkhtmlMimePartView *self, gint *x, gint *y,
 118                                          gint *width, gint *height);
 119
 120 typedef struct _ModestGtkhtmlMimePartViewPrivate ModestGtkhtmlMimePartViewPrivate;
 121 struct _ModestGtkhtmlMimePartViewPrivate {
 122         TnyMimePart *part;
 123         gdouble current_zoom;
 124         gboolean view_images;
 125         gboolean has_external_images;
 126 };
 127
 128 #define MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(o)      (G_TYPE_INSTANCE_GET_PRIVATE((o), \
 129                                                                                        MODEST_TYPE_GTKHTML_MIME_PART_VIEW, \
 130                                                                                        ModestGtkhtmlMimePartViewPrivate))
 131
 132 static GtkHTMLClass *parent_class = NULL;
 133
 134 GtkWidget *
 135 modest_gtkhtml_mime_part_view_new ()
 136 {
 137         return g_object_new (MODEST_TYPE_GTKHTML_MIME_PART_VIEW, NULL);
 138 }
 139
 140 /* GOBJECT IMPLEMENTATION */
 141 GType
 142 modest_gtkhtml_mime_part_view_get_type (void)
 143 {
 144         static GType my_type = 0;
 145         if (!my_type) {
 146                 static const GTypeInfo my_info = {
 147                         sizeof(ModestGtkhtmlMimePartViewClass),
 148                         NULL,           /* base init */
 149                         NULL,           /* base finalize */
 150                         (GClassInitFunc) modest_gtkhtml_mime_part_view_class_init,
 151                         NULL,           /* class finalize */
 152                         NULL,           /* class data */
 153                         sizeof(ModestGtkhtmlMimePartView),
 154                         1,              /* n_preallocs */
 155                         (GInstanceInitFunc) modest_gtkhtml_mime_part_view_init,
 156                         NULL
 157                 };
 158
 159                 static const GInterfaceInfo tny_mime_part_view_info =
 160                 {
 161                   (GInterfaceInitFunc) tny_mime_part_view_init, /* interface_init */
 162                   NULL,         /* interface_finalize */
 163                   NULL          /* interface_data */
 164                 };
 165
 166                 static const GInterfaceInfo modest_mime_part_view_info =
 167                 {
 168                   (GInterfaceInitFunc) modest_mime_part_view_init, /* interface_init */
 169                   NULL,         /* interface_finalize */
 170                   NULL          /* interface_data */
 171                 };
 172
 173                 static const GInterfaceInfo modest_zoomable_info =
 174                 {
 175                   (GInterfaceInitFunc) modest_zoomable_init, /* interface_init */
 176                   NULL,         /* interface_finalize */
 177                   NULL          /* interface_data */
 178                 };
 179
 180                 static const GInterfaceInfo modest_isearch_view_info =
 181                 {
 182                   (GInterfaceInitFunc) modest_isearch_view_init, /* interface_init */
 183                   NULL,         /* interface_finalize */
 184                   NULL          /* interface_data */
 185                 };
 186
 187                 my_type = g_type_register_static (GTK_TYPE_HTML,
 188                                                   "ModestGtkhtmlMimePartView",
 189                                                   &my_info, 0);
 190
 191                 g_type_add_interface_static (my_type, TNY_TYPE_MIME_PART_VIEW,
 192                         &tny_mime_part_view_info);
 193
 194                 g_type_add_interface_static (my_type, MODEST_TYPE_MIME_PART_VIEW,
 195                         &modest_mime_part_view_info);
 196
 197                 g_type_add_interface_static (my_type, MODEST_TYPE_ZOOMABLE,
 198                         &modest_zoomable_info);
 199                 g_type_add_interface_static (my_type, MODEST_TYPE_ISEARCH_VIEW,
 200                         &modest_isearch_view_info);
 201         }
 202         return my_type;
 203 }
 204
 205 static void
 206 modest_gtkhtml_mime_part_view_class_init (ModestGtkhtmlMimePartViewClass *klass)
 207 {
 208         GObjectClass *gobject_class;
 209         GtkBindingSet *binding_set;
 210
 211         gobject_class = (GObjectClass*) klass;
 212
 213         parent_class            = g_type_class_peek_parent (klass);
 214         gobject_class->dispose = modest_gtkhtml_mime_part_view_dispose;
 215         gobject_class->finalize = modest_gtkhtml_mime_part_view_finalize;
 216
 217         klass->get_part_func = modest_gtkhtml_mime_part_view_get_part_default;
 218         klass->set_part_func = modest_gtkhtml_mime_part_view_set_part_default;
 219         klass->clear_func = modest_gtkhtml_mime_part_view_clear_default;
 220         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty_default;
 221         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images_default;
 222         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images_default;
 223         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images_default;
 224         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom_default;
 225         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom_default;
 226         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus_default;
 227         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus_default;
 228         klass->search_func = modest_gtkhtml_mime_part_view_search_default;
 229         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next_default;
 230         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area_default;
 231
 232         binding_set = gtk_binding_set_by_class (klass);
 233         gtk_binding_entry_skip (binding_set, GDK_Down, 0);
 234         gtk_binding_entry_skip (binding_set, GDK_Up, 0);
 235         gtk_binding_entry_skip (binding_set, GDK_KP_Up, 0);
 236         gtk_binding_entry_skip (binding_set, GDK_KP_Down, 0);
 237         gtk_binding_entry_skip (binding_set, GDK_Page_Down, 0);
 238         gtk_binding_entry_skip (binding_set, GDK_Page_Up, 0);
 239         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Up, 0);
 240         gtk_binding_entry_skip (binding_set, GDK_KP_Page_Down, 0);
 241         gtk_binding_entry_skip (binding_set, GDK_Home, 0);
 242         gtk_binding_entry_skip (binding_set, GDK_End, 0);
 243         gtk_binding_entry_skip (binding_set, GDK_KP_Home, 0);
 244         gtk_binding_entry_skip (binding_set, GDK_KP_End, 0);
 245
 246         g_type_class_add_private (gobject_class, sizeof(ModestGtkhtmlMimePartViewPrivate));
 247
 248 }
 249
 250 static void
 251 modest_gtkhtml_mime_part_view_init (ModestGtkhtmlMimePartView *self)
 252 {
 253         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 254         GdkColor base;
 255         GdkColor text;
 256
 257         gtk_html_set_editable        (GTK_HTML(self), FALSE);
 258         gtk_html_allow_selection     (GTK_HTML(self), TRUE);
 259         gtk_html_set_caret_mode      (GTK_HTML(self), FALSE);
 260         gtk_html_set_blocking        (GTK_HTML(self), TRUE);
 261         gtk_html_set_images_blocking (GTK_HTML(self), TRUE);
 262
 263         gdk_color_parse ("#fff", &base);
 264         gdk_color_parse ("#000", &text);
 265         gtk_widget_modify_base (GTK_WIDGET (self), GTK_STATE_NORMAL, &base);
 266         gtk_widget_modify_text (GTK_WIDGET (self), GTK_STATE_NORMAL, &text);
 267
 268         g_signal_connect (G_OBJECT(self), "link_clicked",
 269                           G_CALLBACK(on_link_clicked), self);
 270         g_signal_connect (G_OBJECT(self), "url_requested",
 271                           G_CALLBACK(on_url_requested), self);
 272         g_signal_connect (G_OBJECT(self), "on_url",
 273                           G_CALLBACK(on_url), self);
 274         g_signal_connect (G_OBJECT(self), "notify::style",
 275                           G_CALLBACK (on_notify_style), (gpointer) self);
 276
 277         priv->part = NULL;
 278         priv->current_zoom = 1.0;
 279         priv->view_images = FALSE;
 280         priv->has_external_images = FALSE;
 281 }
 282
 283 static void
 284 modest_gtkhtml_mime_part_view_finalize (GObject *obj)
 285 {
 286         G_OBJECT_CLASS (parent_class)->finalize (obj);
 287 }
 288
 289 static void
 290 modest_gtkhtml_mime_part_view_dispose (GObject *obj)
 291 {
 292         ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (obj);
 293
 294         if (priv->part) {
 295                 g_object_unref (priv->part);
 296                 priv->part = NULL;
 297         }
 298
 299         G_OBJECT_CLASS (parent_class)->dispose (obj);
 300 }
 301
 302 /* GTKHTML SIGNALS HANDLERS */
 303
 304 static void
 305 on_notify_style (GObject *obj, GParamSpec *spec, gpointer userdata)
 306 {
 307         if (strcmp ("style", spec->name) == 0) {
 308                 g_idle_add ((GSourceFunc) update_style, (gpointer) obj);
 309                 gtk_widget_queue_draw (GTK_WIDGET (obj));
 310         }
 311 }
 312
 313 gboolean
 314 same_color (GdkColor *a, GdkColor *b)
 315 {
 316         return ((a->red == b->red) &&
 317                 (a->green == b->green) &&
 318                 (a->blue == b->blue));
 319 }
 320
 321 static gboolean
 322 update_style (ModestGtkhtmlMimePartView *self)
 323 {
 324         GdkColor base;
 325         GdkColor text;
 326         GtkRcStyle *rc_style;
 327
 328         rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (self));
 329
 330         gdk_color_parse ("#fff", &base);
 331         gdk_color_parse ("#000", &text);
 332
 333         if (!same_color (&(rc_style->base[GTK_STATE_NORMAL]), &base) &&
 334             !same_color (&(rc_style->text[GTK_STATE_NORMAL]), &text)) {
 335
 336                 rc_style->base[GTK_STATE_NORMAL] = base;
 337                 rc_style->text[GTK_STATE_NORMAL] = text;
 338                 gtk_widget_modify_style (GTK_WIDGET (self), rc_style);
 339
 340         }
 341
 342         return FALSE;
 343 }
 344
 345
 346
 347 static gboolean
 348 on_link_clicked (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 349 {
 350         gboolean result;
 351         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 352
 353         g_signal_emit_by_name (G_OBJECT (self), "activate-link", uri, &result);
 354         return result;
 355 }
 356
 357 static gboolean
 358 on_url (GtkWidget *widget, const gchar *uri, ModestGtkhtmlMimePartView *self)
 359 {
 360         gboolean result;
 361         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 362
 363         g_signal_emit_by_name (G_OBJECT (self), "link-hover", uri, &result);
 364         return result;
 365 }
 366
 367 typedef struct {
 368         gpointer buffer;
 369         GtkHTML *html;
 370         GtkHTMLStream *stream;
 371 } ImageFetcherInfo;
 372
 373 static gboolean
 374 on_url_requested (GtkWidget *widget, const gchar *uri, GtkHTMLStream *stream,
 375                   ModestGtkhtmlMimePartView *self)
 376 {
 377         gboolean result;
 378         TnyStream *tny_stream;
 379         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 380
 381         if (g_str_has_prefix (uri, "http:")) {
 382                 ModestGtkhtmlMimePartViewPrivate *priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 383
 384                 if (!priv->view_images)
 385                         priv->has_external_images = TRUE;
 386         }
 387
 388         tny_stream = TNY_STREAM (modest_tny_stream_gtkhtml_new (stream, GTK_HTML (widget)));
 389         g_signal_emit_by_name (MODEST_MIME_PART_VIEW (self), "fetch-url", uri, tny_stream, &result);
 390         g_object_unref (tny_stream);
 391         return result;
 392 }
 393
 394 /* INTERNAL API */
 395
 396 static void
 397 set_html_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 398 {
 399         GtkHTMLStream *gtkhtml_stream;
 400         TnyStream *tny_stream;
 401
 402         g_return_if_fail (self);
 403         g_return_if_fail (part);
 404
 405         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 406
 407         tny_stream     = TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 408         tny_stream_reset (tny_stream);
 409
 410         tny_mime_part_decode_to_stream ((TnyMimePart*)part, tny_stream, NULL);
 411         tny_stream_close (tny_stream);
 412         g_object_unref (G_OBJECT(tny_stream));
 413 }
 414
 415 static void
 416 set_text_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 417 {
 418         TnyStream* text_to_html_stream, *tny_stream;
 419         GtkHTMLStream *gtkhtml_stream;
 420
 421         g_return_if_fail (self);
 422         g_return_if_fail (part);
 423
 424         gtkhtml_stream = gtk_html_begin(GTK_HTML(self));
 425         tny_stream =  TNY_STREAM(modest_tny_stream_gtkhtml_new (gtkhtml_stream, GTK_HTML (self)));
 426         text_to_html_stream = TNY_STREAM (modest_stream_text_to_html_new (tny_stream));
 427         modest_stream_text_to_html_set_linkify_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream), 64*1024);
 428         modest_stream_text_to_html_set_full_limit (MODEST_STREAM_TEXT_TO_HTML (text_to_html_stream), 640*1024);
 429
 430         // FIXME: tinymail
 431         tny_mime_part_decode_to_stream ((TnyMimePart*)part, text_to_html_stream, NULL);
 432         tny_stream_write (text_to_html_stream, "\n", 1);
 433         tny_stream_reset (text_to_html_stream);
 434         tny_stream_close (text_to_html_stream);
 435
 436         g_object_unref (G_OBJECT(text_to_html_stream));
 437         g_object_unref (G_OBJECT(tny_stream));
 438         /* gtk_html_stream_destroy (gtkhtml_stream); */
 439 }
 440
 441 static void
 442 set_empty_part (ModestGtkhtmlMimePartView *self)
 443 {
 444         g_return_if_fail (self);
 445
 446         gtk_html_load_from_string (GTK_HTML(self),
 447                                    "", 1);
 448 }
 449
 450 static void
 451 set_part (ModestGtkhtmlMimePartView *self, TnyMimePart *part)
 452 {
 453         ModestGtkhtmlMimePartViewPrivate *priv;
 454
 455         g_return_if_fail (self);
 456
 457         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self);
 458         priv->has_external_images = FALSE;
 459
 460         if (part != priv->part) {
 461                 if (priv->part)
 462                         g_object_unref (G_OBJECT(priv->part));
 463                 if (part)
 464                         g_object_ref   (G_OBJECT(part));
 465                 priv->part = part;
 466         }
 467
 468         if (!part) {
 469                 set_empty_part (self);
 470                 return;
 471         }
 472
 473         if (tny_mime_part_content_type_is (part, "text/html")) {
 474                 set_html_part (self, part);
 475         } else {
 476                 if (tny_mime_part_content_type_is (part, "message/rfc822")) {
 477                         gchar *header_content_type, *header_content_type_lower;
 478                         header_content_type = modest_tny_mime_part_get_header_value (part, "Content-Type");
 479                         if (header_content_type) {
 480                                 header_content_type = g_strstrip (header_content_type);
 481                                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 482
 483                                 if (!g_ascii_strcasecmp (header_content_type_lower, "text/html"))
 484                                         set_html_part (self, part);
 485                                 else
 486                                         set_text_part (self, part);
 487
 488                                 g_free (header_content_type_lower);
 489                                 g_free (header_content_type);
 490                         } else {
 491                                 set_text_part (self, part);
 492                         }
 493                 } else {
 494                         set_text_part (self, part);
 495                 }
 496         }
 497
 498 }
 499
 500 static TnyMimePart*
 501 get_part (ModestGtkhtmlMimePartView *self)
 502 {
 503         TnyMimePart *part;
 504
 505         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), NULL);
 506
 507         part = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE(self)->part;
 508
 509         if (part)
 510                 g_object_ref (part);
 511
 512         return part;
 513 }
 514
 515 static gboolean
 516 has_contents_receiver (gpointer engine, const gchar *data,
 517                        size_t len, gboolean *has_contents)
 518 {
 519         if (len > 1 || ((len == 1)&&(data[0]!='\n'))) {
 520                 *has_contents = TRUE;
 521                 return FALSE;
 522         }
 523         return TRUE;
 524 }
 525
 526 static gboolean
 527 is_empty   (ModestGtkhtmlMimePartView *self)
 528 {
 529         /* TODO: Find some gtkhtml API to check whether there is any (visible, non markup)
 530          * text in the message:
 531          */
 532         gboolean has_contents = FALSE;
 533
 534         gtk_html_export (GTK_HTML (self), "text/plain",
 535                          (GtkHTMLSaveReceiverFn) has_contents_receiver, &has_contents);
 536
 537         return !has_contents;
 538 }
 539
 540 static gboolean
 541 get_view_images   (ModestGtkhtmlMimePartView *self)
 542 {
 543         ModestGtkhtmlMimePartViewPrivate *priv;
 544
 545         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 546
 547         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 548         return priv->view_images;
 549 }
 550
 551 static void
 552 set_view_images   (ModestGtkhtmlMimePartView *self, gboolean view_images)
 553 {
 554         ModestGtkhtmlMimePartViewPrivate *priv;
 555
 556         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 557
 558         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 559         priv->view_images = view_images;
 560 }
 561
 562 static gboolean
 563 has_external_images   (ModestGtkhtmlMimePartView *self)
 564 {
 565         ModestGtkhtmlMimePartViewPrivate *priv;
 566
 567         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), FALSE);
 568
 569         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 570         return priv->has_external_images;
 571 }
 572
 573 static void
 574 set_zoom (ModestGtkhtmlMimePartView *self, gdouble zoom)
 575 {
 576         ModestGtkhtmlMimePartViewPrivate *priv;
 577
 578         g_return_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self));
 579
 580         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 581         priv->current_zoom = zoom;
 582         gtk_html_set_magnification (GTK_HTML(self), zoom);
 583
 584         gtk_widget_queue_resize (GTK_WIDGET (self));
 585 }
 586
 587 static gdouble
 588 get_zoom (ModestGtkhtmlMimePartView *self)
 589 {
 590         ModestGtkhtmlMimePartViewPrivate *priv;
 591
 592         g_return_val_if_fail (MODEST_IS_GTKHTML_MIME_PART_VIEW (self), 1.0);
 593
 594         priv = MODEST_GTKHTML_MIME_PART_VIEW_GET_PRIVATE (self);
 595
 596         return priv->current_zoom;
 597 }
 598
 599 static gboolean
 600 search (ModestGtkhtmlMimePartView *self,
 601         const gchar *string)
 602 {
 603         return gtk_html_engine_search (GTK_HTML (self),
 604                                        string,
 605                                        FALSE,   /* case sensitive */
 606                                        TRUE,    /* forward */
 607                                        FALSE);  /* regexp */
 608 }
 609
 610 static gboolean
 611 search_next (ModestGtkhtmlMimePartView *self)
 612 {
 613         return gtk_html_engine_search_next (GTK_HTML (self));
 614 }
 615
 616 static gboolean
 617 get_selection_area (ModestGtkhtmlMimePartView *self,
 618                     gint *x, gint *y,
 619                     gint *width, gint *height)
 620 {
 621 #ifdef HAVE_GTK_HTML_GET_SELECTION_AREA
 622         gtk_html_get_selection_area (GTK_HTML (self), x, y, width, height);
 623         return TRUE;
 624 #else
 625         return FALSE;
 626 #endif
 627 }
 628
 629
 630 /* TNY MIME PART IMPLEMENTATION */
 631
 632 static void
 633 tny_mime_part_view_init (gpointer g, gpointer iface_data)
 634 {
 635         TnyMimePartViewIface *klass = (TnyMimePartViewIface *)g;
 636
 637         klass->get_part = modest_gtkhtml_mime_part_view_get_part;
 638         klass->set_part = modest_gtkhtml_mime_part_view_set_part;
 639         klass->clear = modest_gtkhtml_mime_part_view_clear;
 640
 641         return;
 642 }
 643
 644 static TnyMimePart*
 645 modest_gtkhtml_mime_part_view_get_part (TnyMimePartView *self)
 646 {
 647         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_part_func (self);
 648 }
 649
 650
 651 static TnyMimePart*
 652 modest_gtkhtml_mime_part_view_get_part_default (TnyMimePartView *self)
 653 {
 654         return TNY_MIME_PART (get_part (MODEST_GTKHTML_MIME_PART_VIEW (self)));
 655 }
 656
 657 static void
 658 modest_gtkhtml_mime_part_view_set_part (TnyMimePartView *self,
 659                                         TnyMimePart *part)
 660 {
 661         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_part_func (self, part);
 662 }
 663
 664 static void
 665 modest_gtkhtml_mime_part_view_set_part_default (TnyMimePartView *self,
 666                                                 TnyMimePart *part)
 667 {
 668         g_return_if_fail ((part == NULL) || TNY_IS_MIME_PART (part));
 669
 670         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), part);
 671 }
 672
 673 static void
 674 modest_gtkhtml_mime_part_view_clear (TnyMimePartView *self)
 675 {
 676         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->clear_func (self);
 677 }
 678
 679 static void
 680 modest_gtkhtml_mime_part_view_clear_default (TnyMimePartView *self)
 681 {
 682         set_part (MODEST_GTKHTML_MIME_PART_VIEW (self), NULL);
 683 }
 684
 685 /* MODEST MIME PART VIEW IMPLEMENTATION */
 686
 687 static void
 688 modest_mime_part_view_init (gpointer g, gpointer iface_data)
 689 {
 690         ModestMimePartViewIface *klass = (ModestMimePartViewIface *)g;
 691
 692         klass->is_empty_func = modest_gtkhtml_mime_part_view_is_empty;
 693         klass->get_view_images_func = modest_gtkhtml_mime_part_view_get_view_images;
 694         klass->set_view_images_func = modest_gtkhtml_mime_part_view_set_view_images;
 695         klass->has_external_images_func = modest_gtkhtml_mime_part_view_has_external_images;
 696
 697         return;
 698 }
 699
 700 static gboolean
 701 modest_gtkhtml_mime_part_view_is_empty (ModestMimePartView *self)
 702 {
 703         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->is_empty_func (self);
 704 }
 705
 706 static gboolean
 707 modest_gtkhtml_mime_part_view_get_view_images (ModestMimePartView *self)
 708 {
 709         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_view_images_func (self);
 710 }
 711
 712 static void
 713 modest_gtkhtml_mime_part_view_set_view_images (ModestMimePartView *self, gboolean view_images)
 714 {
 715         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_view_images_func (self, view_images);
 716 }
 717
 718 static gboolean
 719 modest_gtkhtml_mime_part_view_has_external_images (ModestMimePartView *self)
 720 {
 721         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->has_external_images_func (self);
 722 }
 723
 724 static gboolean
 725 modest_gtkhtml_mime_part_view_is_empty_default (ModestMimePartView *self)
 726 {
 727         return is_empty (MODEST_GTKHTML_MIME_PART_VIEW (self));
 728 }
 729
 730 static gboolean
 731 modest_gtkhtml_mime_part_view_get_view_images_default (ModestMimePartView *self)
 732 {
 733         return get_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 734 }
 735
 736 static void
 737 modest_gtkhtml_mime_part_view_set_view_images_default (ModestMimePartView *self, gboolean view_images)
 738 {
 739         set_view_images (MODEST_GTKHTML_MIME_PART_VIEW (self), view_images);
 740 }
 741
 742 static gboolean
 743 modest_gtkhtml_mime_part_view_has_external_images_default (ModestMimePartView *self)
 744 {
 745         return has_external_images (MODEST_GTKHTML_MIME_PART_VIEW (self));
 746 }
 747
 748
 749 /* MODEST ZOOMABLE IMPLEMENTATION */
 750 static void
 751 modest_zoomable_init (gpointer g, gpointer iface_data)
 752 {
 753         ModestZoomableIface *klass = (ModestZoomableIface *)g;
 754
 755         klass->get_zoom_func = modest_gtkhtml_mime_part_view_get_zoom;
 756         klass->set_zoom_func = modest_gtkhtml_mime_part_view_set_zoom;
 757         klass->zoom_minus_func = modest_gtkhtml_mime_part_view_zoom_minus;
 758         klass->zoom_plus_func = modest_gtkhtml_mime_part_view_zoom_plus;
 759
 760         return;
 761 }
 762
 763 static gdouble
 764 modest_gtkhtml_mime_part_view_get_zoom (ModestZoomable *self)
 765 {
 766         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_zoom_func (self);
 767 }
 768
 769 static gdouble
 770 modest_gtkhtml_mime_part_view_get_zoom_default (ModestZoomable *self)
 771 {
 772         return get_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self));
 773 }
 774
 775 static void
 776 modest_gtkhtml_mime_part_view_set_zoom (ModestZoomable *self, gdouble value)
 777 {
 778         MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->set_zoom_func (self, value);
 779 }
 780
 781 static void
 782 modest_gtkhtml_mime_part_view_set_zoom_default (ModestZoomable *self, gdouble value)
 783 {
 784         set_zoom (MODEST_GTKHTML_MIME_PART_VIEW (self), value);
 785 }
 786
 787 static gboolean
 788 modest_gtkhtml_mime_part_view_zoom_minus (ModestZoomable *self)
 789 {
 790         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_minus_func (self);
 791 }
 792
 793 static gboolean
 794 modest_gtkhtml_mime_part_view_zoom_minus_default (ModestZoomable *self)
 795 {
 796         /* operation not supported in ModestGtkhtmlMimePartView */
 797         return FALSE;
 798 }
 799
 800 static gboolean
 801 modest_gtkhtml_mime_part_view_zoom_plus (ModestZoomable *self)
 802 {
 803         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->zoom_plus_func (self);
 804 }
 805
 806 static gboolean
 807 modest_gtkhtml_mime_part_view_zoom_plus_default (ModestZoomable *self)
 808 {
 809         /* operation not supported in ModestGtkhtmlMimePartView */
 810         return FALSE;
 811 }
 812
 813 /* ISEARCH VIEW IMPLEMENTATION */
 814 static void
 815 modest_isearch_view_init (gpointer g, gpointer iface_data)
 816 {
 817         ModestISearchViewIface *klass = (ModestISearchViewIface *)g;
 818
 819         klass->search_func = modest_gtkhtml_mime_part_view_search;
 820         klass->search_next_func = modest_gtkhtml_mime_part_view_search_next;
 821         klass->get_selection_area_func = modest_gtkhtml_mime_part_view_get_selection_area;
 822
 823         return;
 824 }
 825
 826 static gboolean
 827 modest_gtkhtml_mime_part_view_search (ModestISearchView *self, const gchar *string)
 828 {
 829         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_func (self, string);
 830 }
 831
 832 static gboolean
 833 modest_gtkhtml_mime_part_view_search_default (ModestISearchView *self, const gchar *string)
 834 {
 835         return search (MODEST_GTKHTML_MIME_PART_VIEW (self), string);
 836 }
 837
 838 static gboolean
 839 modest_gtkhtml_mime_part_view_search_next(ModestISearchView *self)
 840 {
 841         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->search_next_func (self);
 842 }
 843
 844 static gboolean
 845 modest_gtkhtml_mime_part_view_search_next_default (ModestISearchView *self)
 846 {
 847         return search_next (MODEST_GTKHTML_MIME_PART_VIEW (self));
 848 }
 849
 850 static gboolean
 851 modest_gtkhtml_mime_part_view_get_selection_area (ModestISearchView *self, gint *x, gint *y,
 852                                                   gint *width, gint *height)
 853 {
 854         return MODEST_GTKHTML_MIME_PART_VIEW_GET_CLASS (self)->get_selection_area_func (self, x, y, width, height);
 855 }
 856
 857 static gboolean
 858 modest_gtkhtml_mime_part_view_get_selection_area_default (ModestISearchView *self, gint *x, gint *y,
 859                                                           gint *width, gint *height)
 860 {
 861         return get_selection_area (MODEST_GTKHTML_MIME_PART_VIEW (self), x, y, width, height);
 862 }