aboutsummaryrefslogtreecommitdiffstats
path: root/mail/em-format-html.h
blob: 954a54ea0c43b76820acab2347bf2fbac84ec2f7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
/*
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Michael Zucchi <notzed@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

/*
  Abstract class for formatting mails to html
*/

#ifndef EM_FORMAT_HTML_H
#define EM_FORMAT_HTML_H

#include <em-format/em-format.h>
#include <misc/e-web-view.h>
#include <gtkhtml/gtkhtml-embedded.h>
#include <libemail-engine/e-mail-enums.h>

/* Standard GObject macros */
#define EM_TYPE_FORMAT_HTML \
    (em_format_html_get_type ())
#define EM_FORMAT_HTML(obj) \
    (G_TYPE_CHECK_INSTANCE_CAST \
    ((obj), EM_TYPE_FORMAT_HTML, EMFormatHTML))
#define EM_FORMAT_HTML_CLASS(cls) \
    (G_TYPE_CHECK_CLASS_CAST \
    ((cls), EM_TYPE_FORMAT_HTML, EMFormatHTMLClass))
#define EM_IS_FORMAT_HTML(obj) \
    (G_TYPE_CHECK_INSTANCE_TYPE \
    ((obj), EM_TYPE_FORMAT_HTML))
#define EM_IS_FORMAT_HTML_CLASS(cls) \
    (G_TYPE_CHECK_CLASS_TYPE \
    ((cls), EM_TYPE_FORMAT_HTML))
#define EM_FORMAT_HTML_GET_CLASS(obj) \
    (G_TYPE_INSTANCE_GET_CLASS \
    ((obj), EM_TYPE_FORMAT_HTML, EMFormatHTMLClass))

G_BEGIN_DECLS

typedef struct _EMFormatHTML EMFormatHTML;
typedef struct _EMFormatHTMLClass EMFormatHTMLClass;
typedef struct _EMFormatHTMLPrivate EMFormatHTMLPrivate;

enum _em_format_html_header_flags {
    EM_FORMAT_HTML_HEADER_TO = 1 << 0,
    EM_FORMAT_HTML_HEADER_CC = 1 << 1,
    EM_FORMAT_HTML_HEADER_BCC = 1 << 2
};

typedef enum {
    EM_FORMAT_HTML_STATE_NONE = 0,
    EM_FORMAT_HTML_STATE_RENDERING
} EMFormatHTMLState;

typedef enum {
    EM_FORMAT_HTML_HEADERS_STATE_EXPANDED = 0, /* Default value */
    EM_FORMAT_HTML_HEADERS_STATE_COLLAPSED
} EMFormatHTMLHeadersState;

typedef enum {
    EM_FORMAT_HTML_COLOR_BODY,  /* header area background */
    EM_FORMAT_HTML_COLOR_CITATION,  /* citation font color */
    EM_FORMAT_HTML_COLOR_CONTENT,   /* message area background */
    EM_FORMAT_HTML_COLOR_FRAME, /* frame around message area */
    EM_FORMAT_HTML_COLOR_HEADER,    /* header font color */
    EM_FORMAT_HTML_COLOR_TEXT,  /* message font color */
    EM_FORMAT_HTML_NUM_COLOR_TYPES
} EMFormatHTMLColorType;

/* A HTMLJob will be executed in another thread, in sequence.
 * It's job is to write to its stream, close it if successful,
 * then exit. */

typedef struct _EMFormatHTMLJob EMFormatHTMLJob;

typedef void    (*EMFormatHTMLJobCallback)  (EMFormatHTMLJob *job,
                         GCancellable *cancellable);

/**
 * struct _EMFormatHTMLJob - A formatting job.
 *
 * @format: Set by allocation function.
 * @stream: Free for use by caller.
 * @puri_level: Set by allocation function.
 * @base: Set by allocation function, used to save state.
 * @callback: This callback will always be invoked, only once, even if the user
 * cancelled the display.  So the callback should free any extra data
 * it allocated every time it is called.
 * @u: Union data, free for caller to use.
 *
 * This object is used to queue a long-running-task which cannot be
 * processed in the primary thread.  When its turn comes, the job will
 * be de-queued and the @callback invoked to perform its processing,
 * restoring various state to match the original state.  This is used
 * for image loading and other internal tasks.
 *
 * This object is struct-subclassable.  Only em_format_html_job_new()
 * may be used to allocate these.
 **/
struct _EMFormatHTMLJob {
    EMFormatHTML *format;
    CamelStream *stream;

    /* We need to track the state of the visibility tree at
     * the point this uri was generated */
    GNode *puri_level;
    CamelURL *base;

    EMFormatHTMLJobCallback callback;
    union {
        gchar *uri;
        CamelMedium *msg;
        EMFormatPURI *puri;
        GNode *puri_level;
        gpointer data;
    } u;
};

/* Pending object (classid: url) */
typedef struct _EMFormatHTMLPObject EMFormatHTMLPObject;

typedef gboolean
        (*EMFormatHTMLPObjectFunc)  (EMFormatHTML *md,
                         GtkHTMLEmbedded *eb,
                         EMFormatHTMLPObject *pobject);

/**
 * struct _EMFormatHTMLPObject - Pending object.
 *
 * @free: Invoked when the object is no longer needed.
 * @format: The parent formatter.
 * @classid: The assigned class id as passed to add_pobject().
 * @func: Callback function.
 * @part: The part as passed to add_pobject().
 *
 * This structure is used to track OBJECT tags which have been
 * inserted into the HTML stream.  When GtkHTML requests them the
 * @func will be invoked to create the embedded widget.
 *
 * This object is struct-subclassable.  Only
 * em_format_html_add_pobject() may be used to allocate these.
 **/
struct _EMFormatHTMLPObject {
    void (*free)(EMFormatHTMLPObject *);
    EMFormatHTML *format;

    gchar *classid;

    EMFormatHTMLPObjectFunc func;
    CamelMimePart *part;
};

#define EM_FORMAT_HTML_HEADER_NOCOLUMNS (EM_FORMAT_HEADER_LAST)

/* header already in html format */
#define EM_FORMAT_HTML_HEADER_HTML (EM_FORMAT_HEADER_LAST<<1)
#define EM_FORMAT_HTML_HEADER_NODEC (EM_FORMAT_HEADER_LAST<<2)

#define EM_FORMAT_HTML_HEADER_LAST (EM_FORMAT_HEADER_LAST<<8)

#define EM_FORMAT_HTML_VPAD \
    "<table cellspacing=0 cellpadding=3><tr><td>" \
    "<a name=\"padding\"></a></td></tr></table>\n"

/**
 * struct _EMFormatHTML - HTML formatter object.
 *
 * @format:
 * @priv:
 * @html:
 * @pending_object_list:
 * @headers:
 * @text_html_flags:
 * @body_colour:
 * @header_colour:
 * @text_colour:
 * @frame_colour:
 * @content_colour:
 * @citation_color:
 * @load_http:2:
 * @load_http_now:1:
 * @mark_citations:1:
 * @simple_headers:1:
 * @hide_headers:1:
 * @show_icon:1:
 *
 * Most of these fields are private or read-only.
 *
 * The base HTML formatter object.  This object drives HTML generation
 * into a GtkHTML parser.  It also handles text to HTML conversion,
 * multipart/related objects and inline images.
 **/
struct _EMFormatHTML {
    EMFormat parent;
    EMFormatHTMLPrivate *priv;

    GQueue pending_object_list;

    GSList *headers;

    guint32 text_html_flags; /* default flags for text to html conversion */
    guint simple_headers:1; /* simple header format, no box/table */
    guint hide_headers:1; /* no headers at all */
    guint show_icon:1; /* show an icon when the sender used Evo */
    guint32 header_wrap_flags;

    EMFormatHTMLState state; /* actual state of the object */
};

struct _EMFormatHTMLClass {
    EMFormatClass parent_class;

    GType html_widget_type;
};

GType       em_format_html_get_type     (void);
EWebView *  em_format_html_get_web_view (EMFormatHTML *efh);
void        em_format_html_load_images  (EMFormatHTML *efh);
void        em_format_html_get_color    (EMFormatHTML *efh,
                         EMFormatHTMLColorType type,
                         GdkColor *color);
void        em_format_html_set_color    (EMFormatHTML *efh,
                         EMFormatHTMLColorType type,
                         const GdkColor *color);
EMailImageLoadingPolicy
        em_format_html_get_image_loading_policy
                        (EMFormatHTML *efh);
void        em_format_html_set_image_loading_policy
                        (EMFormatHTML *efh,
                         EMailImageLoadingPolicy policy);
gboolean    em_format_html_get_mark_citations
                        (EMFormatHTML *efh);
void        em_format_html_set_mark_citations
                        (EMFormatHTML *efh,
                         gboolean mark_citations);
gboolean    em_format_html_get_only_local_photos
                        (EMFormatHTML *efh);
void        em_format_html_set_only_local_photos
                        (EMFormatHTML *efh,
                         gboolean only_local_photos);
gboolean    em_format_html_get_show_sender_photo
                        (EMFormatHTML *efh);
void        em_format_html_set_show_sender_photo
                        (EMFormatHTML *efh,
                         gboolean show_sender_photo);

/* retrieves a pseudo-part icon wrapper for a file */
CamelMimePart * em_format_html_file_part    (EMFormatHTML *efh,
                         const gchar *mime_type,
                         const gchar *filename,
                         GCancellable *cancellable);

/* for implementers */
EMFormatHTMLPObject *
        em_format_html_add_pobject  (EMFormatHTML *efh,
                         gsize size,
                         const gchar *classid,
                         CamelMimePart *part,
                         EMFormatHTMLPObjectFunc func);
EMFormatHTMLPObject *
        em_format_html_find_pobject (EMFormatHTML *efh,
                         const gchar *classid);
EMFormatHTMLPObject *
        em_format_html_find_pobject_func
                        (EMFormatHTML *efh,
                         CamelMimePart *part,
                         EMFormatHTMLPObjectFunc func);
void        em_format_html_remove_pobject   (EMFormatHTML *efh,
                         EMFormatHTMLPObject *pobject);
void        em_format_html_clear_pobject    (EMFormatHTML *efh);
EMFormatHTMLJob *
        em_format_html_job_new      (EMFormatHTML *efh,
                         EMFormatHTMLJobCallback callback,
                         gpointer data);
void        em_format_html_job_queue    (EMFormatHTML *efh,
                         EMFormatHTMLJob *job);
void        em_format_html_clone_sync   (CamelFolder *folder,
                         const gchar *message_uid,
                         CamelMimeMessage *message,
                         EMFormatHTML *efh,
                         EMFormat *source);

gboolean    em_format_html_get_show_real_date
                        (EMFormatHTML *efh);
void        em_format_html_set_show_real_date
                        (EMFormatHTML *efh,
                         gboolean show_real_date);
EMFormatHTMLHeadersState
        em_format_html_get_headers_state
                        (EMFormatHTML *efh);
void        em_format_html_set_headers_state
                        (EMFormatHTML *efh,
                         EMFormatHTMLHeadersState state);
gboolean    em_format_html_get_headers_collapsable
                        (EMFormatHTML *efh);
void        em_format_html_set_headers_collapsable
                        (EMFormatHTML *efh,
                         gboolean collapsable);

gchar *     em_format_html_format_cert_infos
                        (CamelCipherCertInfo *first_cinfo);

CamelStream *   em_format_html_get_cached_image (EMFormatHTML *efh,
                         const gchar *image_uri);
G_END_DECLS

#endif /* EM_FORMAT_HTML_H */