aboutsummaryrefslogtreecommitdiffstats
path: root/mail/em-format.h
blob: 81f4b5c5083f1e721883190d1f5a39b84c1ee1c2 (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
325
326
327
328
329
330
331
332
333
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Michael Zucchi <notzed@ximian.com>
 *
 *  Copyright 2003 Ximian, Inc. (www.ximian.com)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

/*
  Abstract class for formatting mime messages
*/

#ifndef _EM_FORMAT_H
#define _EM_FORMAT_H

#include <glib-object.h>
#include "libedataserver/e-msgport.h"

struct _CamelStream;
struct _CamelMimePart;
struct _CamelMedium;
struct _CamelSession;
struct _CamelURL;
struct _CamelDataWrapper;
struct _CamelMimeMessage;
struct _CamelCipherValidity;

typedef struct _EMFormat EMFormat;
typedef struct _EMFormatClass EMFormatClass;

typedef struct _EMFormatHandler EMFormatHandler;
typedef struct _EMFormatHeader EMFormatHeader;

typedef void (*EMFormatFunc) (EMFormat *md, struct _CamelStream *stream, struct _CamelMimePart *part, const EMFormatHandler *info);

typedef enum _em_format_mode_t {
    EM_FORMAT_NORMAL,
    EM_FORMAT_ALLHEADERS,
    EM_FORMAT_SOURCE,
} em_format_mode_t;

/**
 * struct _EMFormatHandler - MIME type handler.
 * 
 * @mime_type: Type this handler handles.
 * @handler: The handler callback.
 * @flags: Handling flags, see enum _em_format_handler_t.
 * @old: The last handler set on this type.  Allows overrides to
 * fallback to previous implementation.
 * 
 **/
struct _EMFormatHandler {
    char *mime_type;
    EMFormatFunc handler;
    guint32 flags;

    struct _EMFormatHandler *old;
};

/**
 * enum _em_format_handler_t - Format handler flags.
 * 
 * @EM_FORMAT_HANDLER_INLINE: This type should be shown expanded
 * inline by default.
 * @EM_FORMAT_HANDLER_INLINE_DISPOSITION: This type should always be
 * shown inline, despite what the Content-Disposition suggests.
 * 
 **/
enum _em_format_handler_t {
    EM_FORMAT_HANDLER_INLINE = 1<<0,
    EM_FORMAT_HANDLER_INLINE_DISPOSITION = 1<<1,
};


typedef struct _EMFormatPURI EMFormatPURI;
typedef void (*EMFormatPURIFunc)(EMFormat *md, struct _CamelStream *stream, EMFormatPURI *puri);

/**
 * struct _EMFormatPURI - Pending URI object.
 * 
 * @next: Double-linked list header.
 * @prev: Double-linked list header.
 * @free: May be set by allocator and will be called when no longer needed.
 * @format: 
 * @uri: Calculated URI of the part, if the part has one in its
 * Content-Location field.
 * @cid: The RFC2046 Content-Id of the part.  If none is present, a unique value
 * is calculated from @part_id.
 * @part_id: A unique identifier for each part.
 * @func: Callback for when the URI is requested.  The callback writes
 * its data to the supplied stream.
 * @part: 
 * @use_count: 
 * 
 * This is used for multipart/related, and other formatters which may
 * need to include a reference to out-of-band data in the content
 * stream.
 *
 * This object may be subclassed as a struct.
 **/
struct _EMFormatPURI {
    struct _EMFormatPURI *next;
    struct _EMFormatPURI *prev;

    void (*free)(struct _EMFormatPURI *p); /* optional callback for freeing user-fields */
    struct _EMFormat *format;

    char *uri;      /* will be the location of the part, may be empty */
    char *cid;      /* will always be set, a fake one created if needed */
    char *part_id;      /* will always be set, emf->part_id->str for this part */

    EMFormatPURIFunc func;
    struct _CamelMimePart *part;

    unsigned int use_count; /* used by multipart/related to see if it was accessed */
};

/**
 * struct _EMFormatPURITree - Pending URI visibility tree.
 * 
 * @next: Double-linked list header.
 * @prev: Double-linked list header.
 * @parent: Parent in tree.
 * @uri_list: List of EMFormatPURI objects at this level.
 * @children: Child nodes of EMFormatPURITree.
 *
 * This structure is used internally to form a visibility tree of
 * parts in the current formatting stream.  This is to implement the
 * part resolution rules for RFC2387 to implement multipart/related.
 **/
struct _EMFormatPURITree {
    struct _EMFormatPURITree *next;
    struct _EMFormatPURITree *prev;
    struct _EMFormatPURITree *parent;

    EDList uri_list;
    EDList children;
};

struct _EMFormatHeader {
    struct _EMFormatHeader *next, *prev;

    guint32 flags;      /* E_FORMAT_HEADER_* */
    char name[1];
};

#define EM_FORMAT_HEADER_BOLD (1<<0)
#define EM_FORMAT_HEADER_LAST (1<<4) /* reserve 4 slots */

/**
 * struct _EMFormat - Mail formatter object.
 * 
 * @parent: 
 * @priv: 
 * @message: 
 * @folder: 
 * @uid: 
 * @part_id: 
 * @header_list: 
 * @session: 
 * @base url: 
 * @snoop_mime_type: 
 * @valid: 
 * @valid_parent: 
 * @inline_table: 
 * @pending_uri_table: 
 * @pending_uri_tree: 
 * @pending_uri_level: 
 * @mode: 
 * @charset: 
 * @default_charset: 
 * 
 * Most fields are private or read-only.
 *
 * This is the base MIME formatter class.  It provides no formatting
 * itself, but drives most of the basic types, including multipart / * types.
 **/
struct _EMFormat {
    GObject parent;
    
    struct _EMFormatPrivate *priv;
    
    struct _CamelMimeMessage *message; /* the current message */

    struct _CamelFolder *folder;
    char *uid;

    GString *part_id;   /* current part id prefix, for identifying parts directly */

    EDList header_list; /* if empty, then all */

    struct _CamelSession *session; /* session, used for authentication when required */
    struct _CamelURL *base; /* content-base header or absolute content-location, for any part */

    const char *snoop_mime_type; /* if we snooped an application/octet-stream type, what we snooped */

    /* for validity enveloping */
    struct _CamelCipherValidity *valid;
    struct _CamelCipherValidity *valid_parent;

    /* for forcing inlining */
    GHashTable *inline_table;

    /* global lookup table for message */
    GHashTable *pending_uri_table;

    /* visibility tree, also stores every puri permanently */
    struct _EMFormatPURITree *pending_uri_tree;
    /* current level to search from */
    struct _EMFormatPURITree *pending_uri_level;

    em_format_mode_t mode;  /* source/headers/etc */
    char *charset;      /* charset override */
    char *default_charset;  /* charset fallback */
    gboolean composer; /* Formatting from composer ?*/
    gboolean show_photo; /* Want to show the photo of the sender ?*/
    gboolean photo_local; /* Photos only from local addressbooks */
};

struct _EMFormatClass {
    GObjectClass parent_class;

    GHashTable *type_handlers;

    /* lookup handler, default falls back to hashtable above */
    const EMFormatHandler *(*find_handler)(EMFormat *, const char *mime_type);

    /* start formatting a message */
    void (*format_clone)(EMFormat *, struct _CamelFolder *, const char *uid, struct _CamelMimeMessage *, EMFormat *);

    void *dummy0;

    /* some internel error/inconsistency */
    void (*format_error)(EMFormat *, struct _CamelStream *, const char *msg);

    /* use for external structured parts */
    void (*format_attachment)(EMFormat *, struct _CamelStream *, struct _CamelMimePart *, const char *mime_type, const struct _EMFormatHandler *info);

    void *dummy1;

    /* use for unparsable content */
    void (*format_source)(EMFormat *, struct _CamelStream *, struct _CamelMimePart *);
    /* for outputing secure(d) content */
    void (*format_secure)(EMFormat *, struct _CamelStream *, struct _CamelMimePart *, struct _CamelCipherValidity *);

    /* returns true if the formatter is still busy with pending stuff */
    gboolean (*busy)(EMFormat *);

    /* Shows optional way to open messages  */
    void (*format_optional)(EMFormat *, struct _CamelStream *, struct _CamelMimePart *, struct _CamelStream* );
    
    /* signals */
    /* complete, alternative to polling busy, for asynchronous work */
    void (*complete)(EMFormat *);
};

/* helper entry point */
void em_format_set_session(EMFormat *emf, struct _CamelSession *s);

void em_format_set_mode(EMFormat *emf, em_format_mode_t type);
void em_format_set_charset(EMFormat *emf, const char *charset);
void em_format_set_default_charset(EMFormat *emf, const char *charset);

void em_format_clear_headers(EMFormat *emf); /* also indicates to show all headers */
void em_format_default_headers(EMFormat *emf);
void em_format_add_header(EMFormat *emf, const char *name, guint32 flags);

/* FIXME: Need a 'clone' api to copy details about the current view (inlines etc)
   Or maybe it should live with sub-classes? */

int em_format_is_attachment(EMFormat *emf, struct _CamelMimePart *part);

int em_format_is_inline(EMFormat *emf, const char *partid, struct _CamelMimePart *part, const EMFormatHandler *handle);
void em_format_set_inline(EMFormat *emf, const char *partid, int state);

char *em_format_describe_part(struct _CamelMimePart *part, const char *mimetype);

/* for implementers */
GType em_format_get_type(void);

void em_format_class_add_handler(EMFormatClass *emfc, EMFormatHandler *info);
void em_format_class_remove_handler(EMFormatClass *emfc, EMFormatHandler *info);
#define em_format_find_handler(emf, type) ((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->find_handler((emf), (type))
const EMFormatHandler *em_format_fallback_handler(EMFormat *emf, const char *mime_type);

/* puri is short for pending uri ... really */
EMFormatPURI *em_format_add_puri(EMFormat *emf, size_t size, const char *uri, struct _CamelMimePart *part, EMFormatPURIFunc func);
EMFormatPURI *em_format_find_visible_puri(EMFormat *emf, const char *uri);
EMFormatPURI *em_format_find_puri(EMFormat *emf, const char *uri);
void em_format_clear_puri_tree(EMFormat *emf);
void em_format_push_level(EMFormat *emf);
void em_format_pull_level(EMFormat *emf);

/* clones inline state/view and format, or use to redraw */
#define em_format_format_clone(emf, folder, uid, msg, src) ((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->format_clone((emf), (folder), (uid), (msg), (src))
/* formats a new message */
#define em_format_format(emf, folder, uid, msg) ((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->format_clone((emf), (folder), (uid), (msg), NULL)
#define em_format_redraw(emf) ((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->format_clone((EMFormat *)(emf),               \
                                               ((EMFormat *)(emf))->folder, \
                                               ((EMFormat *)(emf))->uid,    \
                                               ((EMFormat *)(emf))->message,    \
                                               (EMFormat *)(emf))
void em_format_format_error(EMFormat *emf, struct _CamelStream *stream, const char *fmt, ...);
#define em_format_format_attachment(emf, stream, msg, type, info) ((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->format_attachment((emf), (stream), (msg), (type), (info))
#define em_format_format_source(emf, stream, msg) ((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->format_source((emf), (stream), (msg))
void em_format_format_secure(EMFormat *emf, struct _CamelStream *stream, struct _CamelMimePart *part, struct _CamelCipherValidity *valid);

#define em_format_busy(emf) ((EMFormatClass *)G_OBJECT_GET_CLASS(emf))->busy((emf))

/* raw content only */
void em_format_format_content(EMFormat *emf, struct _CamelStream *stream, struct _CamelMimePart *part);
/* raw content text parts - should this just be checked/done by above? */
void em_format_format_text(EMFormat *emf, struct _CamelStream *stream, struct _CamelDataWrapper *part);

void em_format_part_as(EMFormat *emf, struct _CamelStream *stream, struct _CamelMimePart *part, const char *mime_type);
void em_format_part(EMFormat *emf, struct _CamelStream *stream, struct _CamelMimePart *part);
void em_format_merge_handler(EMFormat *new, EMFormat *old);

#endif /* ! _EM_FORMAT_H */