1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
16
17 #include <config.h>
18
19 #include "output/cairo.h"
20
21 #include "libpspp/assertion.h"
22 #include "libpspp/cast.h"
23 #include "libpspp/hash-functions.h"
24 #include "libpspp/message.h"
25 #include "libpspp/pool.h"
26 #include "libpspp/start-date.h"
27 #include "libpspp/str.h"
28 #include "libpspp/string-map.h"
29 #include "libpspp/version.h"
30 #include "data/file-handle-def.h"
31 #include "output/cairo-chart.h"
32 #include "output/chart-item-provider.h"
33 #include "output/charts/boxplot.h"
34 #include "output/charts/np-plot.h"
35 #include "output/charts/piechart.h"
36 #include "output/charts/barchart.h"
37 #include "output/charts/plot-hist.h"
38 #include "output/charts/roc-chart.h"
39 #include "output/charts/spreadlevel-plot.h"
40 #include "output/charts/scree.h"
41 #include "output/charts/scatterplot.h"
42 #include "output/driver-provider.h"
43 #include "output/group-item.h"
44 #include "output/message-item.h"
45 #include "output/options.h"
46 #include "output/page-setup-item.h"
47 #include "output/render.h"
48 #include "output/table-item.h"
49 #include "output/table.h"
50 #include "output/text-item.h"
51
52 #include <cairo/cairo-pdf.h>
53 #include <cairo/cairo-ps.h>
54 #include <cairo/cairo-svg.h>
55 #include <cairo/cairo.h>
56 #include <inttypes.h>
57 #include <math.h>
58 #include <pango/pango-font.h>
59 #include <pango/pango-layout.h>
60 #include <pango/pango.h>
61 #include <pango/pangocairo.h>
62 #include <stdlib.h>
63
64 #include "gl/c-ctype.h"
65 #include "gl/c-strcase.h"
66 #include "gl/intprops.h"
67 #include "gl/minmax.h"
68 #include "gl/xalloc.h"
69
70 #include "gettext.h"
71 #define _(msgid) gettext (msgid)
72
73 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
74 #define H TABLE_HORZ
75 #define V TABLE_VERT
76
77 /* The unit used for internal measurements is inch/(72 * XR_POINT).
78 (Thus, XR_POINT units represent one point.) */
79 #define XR_POINT PANGO_SCALE
80
81 /* Conversions to and from points. */
82 static double
xr_to_pt(int x)83 xr_to_pt (int x)
84 {
85 return x / (double) XR_POINT;
86 }
87
88 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
89 static int
px_to_xr(int x)90 px_to_xr (int x)
91 {
92 return x * (PANGO_SCALE * 72 / 96);
93 }
94
95 /* Dimensions for drawing lines in tables. */
96 #define XR_LINE_WIDTH (XR_POINT / 2) /* Width of an ordinary line. */
97 #define XR_LINE_SPACE XR_POINT /* Space between double lines. */
98
99 /* Output types. */
100 enum xr_output_type
101 {
102 XR_PDF,
103 XR_PS,
104 XR_SVG
105 };
106
107 /* Cairo fonts. */
108 enum xr_font_type
109 {
110 XR_FONT_PROPORTIONAL,
111 XR_FONT_EMPHASIS,
112 XR_FONT_FIXED,
113 XR_N_FONTS
114 };
115
116 /* A font for use with Cairo. */
117 struct xr_font
118 {
119 PangoFontDescription *desc;
120 PangoLayout *layout;
121 };
122
123 /* An output item whose rendering is in progress. */
124 struct xr_render_fsm
125 {
126 /* Renders as much of itself as it can on the current page. Returns true
127 if rendering is complete, false if the output item needs another
128 page. */
129 bool (*render) (struct xr_render_fsm *, struct xr_driver *);
130
131 /* Destroys the output item. */
132 void (*destroy) (struct xr_render_fsm *);
133 };
134
135 /* Cairo output driver. */
136 struct xr_driver
137 {
138 struct output_driver driver;
139
140 /* User parameters. */
141 struct xr_font fonts[XR_N_FONTS];
142
143 int width; /* Page width minus margins. */
144 int length; /* Page length minus margins and header. */
145
146 int left_margin; /* Left margin in inch/(72 * XR_POINT). */
147 int right_margin; /* Right margin in inch/(72 * XR_POINT). */
148 int top_margin; /* Top margin in inch/(72 * XR_POINT). */
149 int bottom_margin; /* Bottom margin in inch/(72 * XR_POINT). */
150
151 int line_space; /* Space between lines. */
152 int line_width; /* Width of lines. */
153
154 int min_break[TABLE_N_AXES]; /* Min cell size to break across pages. */
155 int object_spacing; /* Space between output objects. */
156
157 struct cell_color bg; /* Background color */
158 struct cell_color fg; /* Foreground color */
159
160 int initial_page_number;
161
162 struct page_heading headings[2]; /* Top and bottom headings. */
163 int headings_height[2];
164
165 /* Internal state. */
166 struct render_params *params;
167 double font_scale;
168 int char_width, char_height;
169 char *command_name;
170 char *title;
171 char *subtitle;
172 cairo_t *cairo;
173 cairo_surface_t *surface;
174 int page_number; /* Current page number. */
175 int x, y;
176 struct xr_render_fsm *fsm;
177 int nest;
178 struct string_map heading_vars;
179 };
180
181 static const struct output_driver_class cairo_driver_class;
182
183 static void xr_driver_destroy_fsm (struct xr_driver *);
184 static void xr_driver_run_fsm (struct xr_driver *);
185
186 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
187 enum render_line_style styles[TABLE_N_AXES][2],
188 struct cell_color colors[TABLE_N_AXES][2]);
189 static void xr_measure_cell_width (void *, const struct table_cell *,
190 int *min, int *max);
191 static int xr_measure_cell_height (void *, const struct table_cell *,
192 int width);
193 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
194 int bb[TABLE_N_AXES][2],
195 int spill[TABLE_N_AXES][2],
196 int clip[TABLE_N_AXES][2]);
197 static int xr_adjust_break (void *, const struct table_cell *,
198 int width, int height);
199
200 static struct xr_render_fsm *xr_render_output_item (
201 struct xr_driver *, const struct output_item *);
202
203 /* Output driver basics. */
204
205 static struct xr_driver *
xr_driver_cast(struct output_driver * driver)206 xr_driver_cast (struct output_driver *driver)
207 {
208 assert (driver->class == &cairo_driver_class);
209 return UP_CAST (driver, struct xr_driver, driver);
210 }
211
212 static struct driver_option *
opt(struct output_driver * d,struct string_map * options,const char * key,const char * default_value)213 opt (struct output_driver *d, struct string_map *options, const char *key,
214 const char *default_value)
215 {
216 return driver_option_get (d, options, key, default_value);
217 }
218
219 static int
lookup_color_name(const char * s)220 lookup_color_name (const char *s)
221 {
222 struct color
223 {
224 struct hmap_node hmap_node;
225 const char *name;
226 int code;
227 };
228
229 static struct color colors[] =
230 {
231 { .name = "aliceblue", .code = 0xf0f8ff },
232 { .name = "antiquewhite", .code = 0xfaebd7 },
233 { .name = "aqua", .code = 0x00ffff },
234 { .name = "aquamarine", .code = 0x7fffd4 },
235 { .name = "azure", .code = 0xf0ffff },
236 { .name = "beige", .code = 0xf5f5dc },
237 { .name = "bisque", .code = 0xffe4c4 },
238 { .name = "black", .code = 0x000000 },
239 { .name = "blanchedalmond", .code = 0xffebcd },
240 { .name = "blue", .code = 0x0000ff },
241 { .name = "blueviolet", .code = 0x8a2be2 },
242 { .name = "brown", .code = 0xa52a2a },
243 { .name = "burlywood", .code = 0xdeb887 },
244 { .name = "cadetblue", .code = 0x5f9ea0 },
245 { .name = "chartreuse", .code = 0x7fff00 },
246 { .name = "chocolate", .code = 0xd2691e },
247 { .name = "coral", .code = 0xff7f50 },
248 { .name = "cornflowerblue", .code = 0x6495ed },
249 { .name = "cornsilk", .code = 0xfff8dc },
250 { .name = "crimson", .code = 0xdc143c },
251 { .name = "cyan", .code = 0x00ffff },
252 { .name = "darkblue", .code = 0x00008b },
253 { .name = "darkcyan", .code = 0x008b8b },
254 { .name = "darkgoldenrod", .code = 0xb8860b },
255 { .name = "darkgray", .code = 0xa9a9a9 },
256 { .name = "darkgreen", .code = 0x006400 },
257 { .name = "darkgrey", .code = 0xa9a9a9 },
258 { .name = "darkkhaki", .code = 0xbdb76b },
259 { .name = "darkmagenta", .code = 0x8b008b },
260 { .name = "darkolivegreen", .code = 0x556b2f },
261 { .name = "darkorange", .code = 0xff8c00 },
262 { .name = "darkorchid", .code = 0x9932cc },
263 { .name = "darkred", .code = 0x8b0000 },
264 { .name = "darksalmon", .code = 0xe9967a },
265 { .name = "darkseagreen", .code = 0x8fbc8f },
266 { .name = "darkslateblue", .code = 0x483d8b },
267 { .name = "darkslategray", .code = 0x2f4f4f },
268 { .name = "darkslategrey", .code = 0x2f4f4f },
269 { .name = "darkturquoise", .code = 0x00ced1 },
270 { .name = "darkviolet", .code = 0x9400d3 },
271 { .name = "deeppink", .code = 0xff1493 },
272 { .name = "deepskyblue", .code = 0x00bfff },
273 { .name = "dimgray", .code = 0x696969 },
274 { .name = "dimgrey", .code = 0x696969 },
275 { .name = "dodgerblue", .code = 0x1e90ff },
276 { .name = "firebrick", .code = 0xb22222 },
277 { .name = "floralwhite", .code = 0xfffaf0 },
278 { .name = "forestgreen", .code = 0x228b22 },
279 { .name = "fuchsia", .code = 0xff00ff },
280 { .name = "gainsboro", .code = 0xdcdcdc },
281 { .name = "ghostwhite", .code = 0xf8f8ff },
282 { .name = "gold", .code = 0xffd700 },
283 { .name = "goldenrod", .code = 0xdaa520 },
284 { .name = "gray", .code = 0x808080 },
285 { .name = "green", .code = 0x008000 },
286 { .name = "greenyellow", .code = 0xadff2f },
287 { .name = "grey", .code = 0x808080 },
288 { .name = "honeydew", .code = 0xf0fff0 },
289 { .name = "hotpink", .code = 0xff69b4 },
290 { .name = "indianred", .code = 0xcd5c5c },
291 { .name = "indigo", .code = 0x4b0082 },
292 { .name = "ivory", .code = 0xfffff0 },
293 { .name = "khaki", .code = 0xf0e68c },
294 { .name = "lavender", .code = 0xe6e6fa },
295 { .name = "lavenderblush", .code = 0xfff0f5 },
296 { .name = "lawngreen", .code = 0x7cfc00 },
297 { .name = "lemonchiffon", .code = 0xfffacd },
298 { .name = "lightblue", .code = 0xadd8e6 },
299 { .name = "lightcoral", .code = 0xf08080 },
300 { .name = "lightcyan", .code = 0xe0ffff },
301 { .name = "lightgoldenrodyellow", .code = 0xfafad2 },
302 { .name = "lightgray", .code = 0xd3d3d3 },
303 { .name = "lightgreen", .code = 0x90ee90 },
304 { .name = "lightgrey", .code = 0xd3d3d3 },
305 { .name = "lightpink", .code = 0xffb6c1 },
306 { .name = "lightsalmon", .code = 0xffa07a },
307 { .name = "lightseagreen", .code = 0x20b2aa },
308 { .name = "lightskyblue", .code = 0x87cefa },
309 { .name = "lightslategray", .code = 0x778899 },
310 { .name = "lightslategrey", .code = 0x778899 },
311 { .name = "lightsteelblue", .code = 0xb0c4de },
312 { .name = "lightyellow", .code = 0xffffe0 },
313 { .name = "lime", .code = 0x00ff00 },
314 { .name = "limegreen", .code = 0x32cd32 },
315 { .name = "linen", .code = 0xfaf0e6 },
316 { .name = "magenta", .code = 0xff00ff },
317 { .name = "maroon", .code = 0x800000 },
318 { .name = "mediumaquamarine", .code = 0x66cdaa },
319 { .name = "mediumblue", .code = 0x0000cd },
320 { .name = "mediumorchid", .code = 0xba55d3 },
321 { .name = "mediumpurple", .code = 0x9370db },
322 { .name = "mediumseagreen", .code = 0x3cb371 },
323 { .name = "mediumslateblue", .code = 0x7b68ee },
324 { .name = "mediumspringgreen", .code = 0x00fa9a },
325 { .name = "mediumturquoise", .code = 0x48d1cc },
326 { .name = "mediumvioletred", .code = 0xc71585 },
327 { .name = "midnightblue", .code = 0x191970 },
328 { .name = "mintcream", .code = 0xf5fffa },
329 { .name = "mistyrose", .code = 0xffe4e1 },
330 { .name = "moccasin", .code = 0xffe4b5 },
331 { .name = "navajowhite", .code = 0xffdead },
332 { .name = "navy", .code = 0x000080 },
333 { .name = "oldlace", .code = 0xfdf5e6 },
334 { .name = "olive", .code = 0x808000 },
335 { .name = "olivedrab", .code = 0x6b8e23 },
336 { .name = "orange", .code = 0xffa500 },
337 { .name = "orangered", .code = 0xff4500 },
338 { .name = "orchid", .code = 0xda70d6 },
339 { .name = "palegoldenrod", .code = 0xeee8aa },
340 { .name = "palegreen", .code = 0x98fb98 },
341 { .name = "paleturquoise", .code = 0xafeeee },
342 { .name = "palevioletred", .code = 0xdb7093 },
343 { .name = "papayawhip", .code = 0xffefd5 },
344 { .name = "peachpuff", .code = 0xffdab9 },
345 { .name = "peru", .code = 0xcd853f },
346 { .name = "pink", .code = 0xffc0cb },
347 { .name = "plum", .code = 0xdda0dd },
348 { .name = "powderblue", .code = 0xb0e0e6 },
349 { .name = "purple", .code = 0x800080 },
350 { .name = "red", .code = 0xff0000 },
351 { .name = "rosybrown", .code = 0xbc8f8f },
352 { .name = "royalblue", .code = 0x4169e1 },
353 { .name = "saddlebrown", .code = 0x8b4513 },
354 { .name = "salmon", .code = 0xfa8072 },
355 { .name = "sandybrown", .code = 0xf4a460 },
356 { .name = "seagreen", .code = 0x2e8b57 },
357 { .name = "seashell", .code = 0xfff5ee },
358 { .name = "sienna", .code = 0xa0522d },
359 { .name = "silver", .code = 0xc0c0c0 },
360 { .name = "skyblue", .code = 0x87ceeb },
361 { .name = "slateblue", .code = 0x6a5acd },
362 { .name = "slategray", .code = 0x708090 },
363 { .name = "slategrey", .code = 0x708090 },
364 { .name = "snow", .code = 0xfffafa },
365 { .name = "springgreen", .code = 0x00ff7f },
366 { .name = "steelblue", .code = 0x4682b4 },
367 { .name = "tan", .code = 0xd2b48c },
368 { .name = "teal", .code = 0x008080 },
369 { .name = "thistle", .code = 0xd8bfd8 },
370 { .name = "tomato", .code = 0xff6347 },
371 { .name = "turquoise", .code = 0x40e0d0 },
372 { .name = "violet", .code = 0xee82ee },
373 { .name = "wheat", .code = 0xf5deb3 },
374 { .name = "white", .code = 0xffffff },
375 { .name = "whitesmoke", .code = 0xf5f5f5 },
376 { .name = "yellow", .code = 0xffff00 },
377 { .name = "yellowgreen", .code = 0x9acd32 },
378 };
379
380 static struct hmap color_table = HMAP_INITIALIZER (color_table);
381
382 if (hmap_is_empty (&color_table))
383 for (size_t i = 0; i < sizeof colors / sizeof *colors; i++)
384 hmap_insert (&color_table, &colors[i].hmap_node,
385 hash_string (colors[i].name, 0));
386
387 const struct color *color;
388 HMAP_FOR_EACH_WITH_HASH (color, struct color, hmap_node,
389 hash_string (s, 0), &color_table)
390 if (!strcmp (color->name, s))
391 return color->code;
392 return -1;
393 }
394
395 static bool
parse_color__(const char * s,struct cell_color * color)396 parse_color__ (const char *s, struct cell_color *color)
397 {
398 /* #rrrrggggbbbb */
399 uint16_t r16, g16, b16;
400 int len;
401 if (sscanf (s, "#%4"SCNx16"%4"SCNx16"%4"SCNx16"%n",
402 &r16, &g16, &b16, &len) == 3
403 && len == 13
404 && !s[len])
405 {
406 color->r = r16 >> 8;
407 color->g = g16 >> 8;
408 color->b = b16 >> 8;
409 return true;
410 }
411
412 /* #rrggbb */
413 uint8_t r, g, b;
414 if (sscanf (s, "#%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
415 && len == 7
416 && !s[len])
417 {
418 color->r = r;
419 color->g = g;
420 color->b = b;
421 return true;
422 }
423
424 /* rrggbb */
425 if (sscanf (s, "%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
426 && len == 6
427 && !s[len])
428 {
429 color->r = r;
430 color->g = g;
431 color->b = b;
432 return true;
433 }
434
435 /* rgb(r,g,b) */
436 if (sscanf (s, "rgb (%"SCNi8" , %"SCNi8" , %"SCNi8") %n",
437 &r, &g, &b, &len) == 3
438 && !s[len])
439 {
440 color->r = r;
441 color->g = g;
442 color->b = b;
443 return true;
444 }
445
446 /* rgba(r,g,b,a), ignoring a. */
447 if (sscanf (s, "rgba (%"SCNi8" , %"SCNi8" , %"SCNi8", %*f) %n",
448 &r, &g, &b, &len) == 3
449 && !s[len])
450 {
451 color->r = r;
452 color->g = g;
453 color->b = b;
454 return true;
455 }
456
457 int code = lookup_color_name (s);
458 if (code >= 0)
459 {
460 color->r = code >> 16;
461 color->g = code >> 8;
462 color->b = code;
463 return true;
464 }
465
466 return false;
467 }
468
469 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
470 Currently, the input string must be of the form "#RRRRGGGGBBBB"
471 Future implementations might allow things like "yellow" and
472 "sky-blue-ultra-brown"
473 */
474 void
parse_color(struct output_driver * d,struct string_map * options,const char * key,const char * default_value,struct cell_color * color)475 parse_color (struct output_driver *d, struct string_map *options,
476 const char *key, const char *default_value,
477 struct cell_color *color)
478 {
479 char *string = parse_string (opt (d, options, key, default_value));
480 if (!parse_color__ (string, color) && !parse_color__ (default_value, color))
481 *color = (struct cell_color) CELL_COLOR_BLACK;
482 free (string);
483 }
484
485 static PangoFontDescription *
parse_font(const char * font,int default_size,bool bold,bool italic)486 parse_font (const char *font, int default_size, bool bold, bool italic)
487 {
488 if (!c_strcasecmp (font, "Monospaced"))
489 font = "Monospace";
490
491 PangoFontDescription *desc = pango_font_description_from_string (font);
492 if (desc == NULL)
493 return NULL;
494
495 /* If the font description didn't include an explicit font size, then set it
496 to DEFAULT_SIZE, which is in inch/72000 units. */
497 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
498 pango_font_description_set_size (desc,
499 (default_size / 1000.0) * PANGO_SCALE);
500
501 pango_font_description_set_weight (desc, (bold
502 ? PANGO_WEIGHT_BOLD
503 : PANGO_WEIGHT_NORMAL));
504 pango_font_description_set_style (desc, (italic
505 ? PANGO_STYLE_ITALIC
506 : PANGO_STYLE_NORMAL));
507
508 return desc;
509 }
510
511 static PangoFontDescription *
parse_font_option(struct output_driver * d,struct string_map * options,const char * key,const char * default_value,int default_size,bool bold,bool italic)512 parse_font_option (struct output_driver *d, struct string_map *options,
513 const char *key, const char *default_value,
514 int default_size, bool bold, bool italic)
515 {
516 char *string = parse_string (opt (d, options, key, default_value));
517 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
518 if (!desc)
519 {
520 msg (MW, _("`%s': bad font specification"), string);
521
522 /* Fall back to DEFAULT_VALUE, which had better be a valid font
523 description. */
524 desc = parse_font (default_value, default_size, bold, italic);
525 assert (desc != NULL);
526 }
527 free (string);
528
529 return desc;
530 }
531
532 static void
apply_options(struct xr_driver * xr,struct string_map * o)533 apply_options (struct xr_driver *xr, struct string_map *o)
534 {
535 struct output_driver *d = &xr->driver;
536
537 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
538 int left_margin, right_margin;
539 int top_margin, bottom_margin;
540 int paper_width, paper_length;
541 int font_size;
542 int min_break[TABLE_N_AXES];
543
544 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
545 const double scale = XR_POINT / 1000.;
546
547 int i;
548
549 for (i = 0; i < XR_N_FONTS; i++)
550 {
551 struct xr_font *font = &xr->fonts[i];
552
553 if (font->desc != NULL)
554 pango_font_description_free (font->desc);
555 }
556
557 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
558 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
559 (d, o, "fixed-font", "monospace", font_size, false, false);
560 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
561 d, o, "prop-font", "sans serif", font_size, false, false);
562 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
563 d, o, "emph-font", "sans serif", font_size, false, true);
564
565 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
566 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
567
568 /* Get dimensions. */
569 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
570 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
571 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
572 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
573 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
574
575 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
576 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
577
578 int object_spacing = (parse_dimension (opt (d, o, "object-spacing", NULL))
579 * scale);
580
581 /* Convert to inch/(XR_POINT * 72). */
582 xr->left_margin = left_margin * scale;
583 xr->right_margin = right_margin * scale;
584 xr->top_margin = top_margin * scale;
585 xr->bottom_margin = bottom_margin * scale;
586 xr->width = (paper_width - left_margin - right_margin) * scale;
587 xr->length = (paper_length - top_margin - bottom_margin) * scale;
588 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
589 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
590 xr->object_spacing = object_spacing >= 0 ? object_spacing : XR_POINT * 12;
591
592 /* There are no headings so headings_height can stay 0. */
593 }
594
595 static struct xr_driver *
xr_allocate(const char * name,int device_type,struct string_map * o,double font_scale)596 xr_allocate (const char *name, int device_type, struct string_map *o,
597 double font_scale)
598 {
599 struct xr_driver *xr = xzalloc (sizeof *xr);
600 struct output_driver *d = &xr->driver;
601
602 output_driver_init (d, &cairo_driver_class, name, device_type);
603
604 string_map_init (&xr->heading_vars);
605
606 /* This is a nasty kluge for an issue that does not make sense. On any
607 surface other than a screen (e.g. for output to PDF or PS or SVG), the
608 fonts are way too big by default. A "9-point" font seems to appear about
609 16 points tall. We use a scale factor for these surfaces to help, but the
610 underlying issue is a mystery. */
611 xr->font_scale = font_scale;
612
613 apply_options (xr, o);
614
615 return xr;
616 }
617
618 static int
pango_to_xr(int pango)619 pango_to_xr (int pango)
620 {
621 return (XR_POINT != PANGO_SCALE
622 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
623 : pango);
624 }
625
626 static int
xr_to_pango(int xr)627 xr_to_pango (int xr)
628 {
629 return (XR_POINT != PANGO_SCALE
630 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
631 : xr);
632 }
633
634 static void
xr_measure_fonts(cairo_t * cairo,const struct xr_font fonts[XR_N_FONTS],int * char_width,int * char_height)635 xr_measure_fonts (cairo_t *cairo, const struct xr_font fonts[XR_N_FONTS],
636 int *char_width, int *char_height)
637 {
638 *char_width = 0;
639 *char_height = 0;
640 for (int i = 0; i < XR_N_FONTS; i++)
641 {
642 PangoLayout *layout = pango_cairo_create_layout (cairo);
643 pango_layout_set_font_description (layout, fonts[i].desc);
644
645 pango_layout_set_text (layout, "0", 1);
646
647 int cw, ch;
648 pango_layout_get_size (layout, &cw, &ch);
649 *char_width = MAX (*char_width, pango_to_xr (cw));
650 *char_height = MAX (*char_height, pango_to_xr (ch));
651
652 g_object_unref (G_OBJECT (layout));
653 }
654 }
655
656 static int
get_layout_height(PangoLayout * layout)657 get_layout_height (PangoLayout *layout)
658 {
659 int w, h;
660 pango_layout_get_size (layout, &w, &h);
661 return h;
662 }
663
664 static int
xr_render_page_heading(cairo_t * cairo,const PangoFontDescription * font,const struct page_heading * ph,int page_number,int width,bool draw,int base_y)665 xr_render_page_heading (cairo_t *cairo, const PangoFontDescription *font,
666 const struct page_heading *ph, int page_number,
667 int width, bool draw, int base_y)
668 {
669 PangoLayout *layout = pango_cairo_create_layout (cairo);
670 pango_layout_set_font_description (layout, font);
671
672 int y = 0;
673 for (size_t i = 0; i < ph->n; i++)
674 {
675 const struct page_paragraph *pp = &ph->paragraphs[i];
676
677 char *markup = output_driver_substitute_heading_vars (pp->markup,
678 page_number);
679 pango_layout_set_markup (layout, markup, -1);
680 free (markup);
681
682 pango_layout_set_alignment (
683 layout,
684 (pp->halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
685 : pp->halign == TABLE_HALIGN_CENTER ? PANGO_ALIGN_CENTER
686 : pp->halign == TABLE_HALIGN_MIXED ? PANGO_ALIGN_LEFT
687 : PANGO_ALIGN_RIGHT));
688 pango_layout_set_width (layout, xr_to_pango (width));
689 if (draw)
690 {
691 cairo_save (cairo);
692 cairo_translate (cairo, 0, xr_to_pt (y + base_y));
693 pango_cairo_show_layout (cairo, layout);
694 cairo_restore (cairo);
695 }
696
697 y += pango_to_xr (get_layout_height (layout));
698 }
699
700 g_object_unref (G_OBJECT (layout));
701
702 return y;
703 }
704
705 static int
xr_measure_headings(cairo_surface_t * surface,const PangoFontDescription * font,const struct page_heading headings[2],int width,int object_spacing,int height[2])706 xr_measure_headings (cairo_surface_t *surface,
707 const PangoFontDescription *font,
708 const struct page_heading headings[2],
709 int width, int object_spacing, int height[2])
710 {
711 cairo_t *cairo = cairo_create (surface);
712 int total = 0;
713 for (int i = 0; i < 2; i++)
714 {
715 int h = xr_render_page_heading (cairo, font, &headings[i], -1,
716 width, false, 0);
717
718 /* If the top heading is nonempty, add some space below it. */
719 if (h && i == 0)
720 h += object_spacing;
721
722 if (height)
723 height[i] = h;
724 total += h;
725 }
726 cairo_destroy (cairo);
727 return total;
728 }
729
730 static bool
xr_check_fonts(cairo_surface_t * surface,const struct xr_font fonts[XR_N_FONTS],int usable_width,int usable_length)731 xr_check_fonts (cairo_surface_t *surface,
732 const struct xr_font fonts[XR_N_FONTS],
733 int usable_width, int usable_length)
734 {
735 cairo_t *cairo = cairo_create (surface);
736 int char_width, char_height;
737 xr_measure_fonts (cairo, fonts, &char_width, &char_height);
738 cairo_destroy (cairo);
739
740 bool ok = true;
741 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
742 if (usable_width / char_width < MIN_WIDTH)
743 {
744 msg (ME, _("The defined page is not wide enough to hold at least %d "
745 "characters in the default font. In fact, there's only "
746 "room for %d characters."),
747 MIN_WIDTH, usable_width / char_width);
748 ok = false;
749 }
750 if (usable_length / char_height < MIN_LENGTH)
751 {
752 msg (ME, _("The defined page is not long enough to hold at least %d "
753 "lines in the default font. In fact, there's only "
754 "room for %d lines."),
755 MIN_LENGTH, usable_length / char_height);
756 ok = false;
757 }
758 return ok;
759 }
760
761 static void
xr_set_cairo(struct xr_driver * xr,cairo_t * cairo)762 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
763 {
764 xr->cairo = cairo;
765
766 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
767
768 xr_measure_fonts (xr->cairo, xr->fonts, &xr->char_width, &xr->char_height);
769
770 for (int i = 0; i < XR_N_FONTS; i++)
771 {
772 struct xr_font *font = &xr->fonts[i];
773 font->layout = pango_cairo_create_layout (cairo);
774 pango_layout_set_font_description (font->layout, font->desc);
775 }
776
777 if (xr->params == NULL)
778 {
779 xr->params = xmalloc (sizeof *xr->params);
780 xr->params->draw_line = xr_draw_line;
781 xr->params->measure_cell_width = xr_measure_cell_width;
782 xr->params->measure_cell_height = xr_measure_cell_height;
783 xr->params->adjust_break = xr_adjust_break;
784 xr->params->draw_cell = xr_draw_cell;
785 xr->params->aux = xr;
786 xr->params->size[H] = xr->width;
787 xr->params->size[V] = xr->length;
788 xr->params->font_size[H] = xr->char_width;
789 xr->params->font_size[V] = xr->char_height;
790
791 int lw = XR_LINE_WIDTH;
792 int ls = XR_LINE_SPACE;
793 for (int i = 0; i < TABLE_N_AXES; i++)
794 {
795 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
796 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
797 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
798 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
799 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
800 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
801 }
802
803 for (int i = 0; i < TABLE_N_AXES; i++)
804 xr->params->min_break[i] = xr->min_break[i];
805 xr->params->supports_margins = true;
806 xr->params->rtl = render_direction_rtl ();
807 }
808
809 cairo_set_source_rgb (xr->cairo,
810 xr->fg.r / 255.0, xr->fg.g / 255.0, xr->fg.b / 255.0);
811 }
812
813 static struct output_driver *
xr_create(const char * file_name,enum settings_output_devices device_type,struct string_map * o,enum xr_output_type file_type)814 xr_create (const char *file_name, enum settings_output_devices device_type,
815 struct string_map *o, enum xr_output_type file_type)
816 {
817 struct xr_driver *xr;
818 cairo_status_t status;
819 double width_pt, length_pt;
820
821 xr = xr_allocate (file_name, device_type, o, 72.0 / 128.0);
822
823 width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
824 length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
825 if (file_type == XR_PDF)
826 xr->surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
827 else if (file_type == XR_PS)
828 xr->surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
829 else if (file_type == XR_SVG)
830 xr->surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
831 else
832 NOT_REACHED ();
833
834 status = cairo_surface_status (xr->surface);
835 if (status != CAIRO_STATUS_SUCCESS)
836 {
837 msg (ME, _("error opening output file `%s': %s"),
838 file_name, cairo_status_to_string (status));
839 goto error;
840 }
841
842 if (!xr_check_fonts (xr->surface, xr->fonts, xr->width, xr->length))
843 goto error;
844
845 return &xr->driver;
846
847 error:
848 output_driver_destroy (&xr->driver);
849 return NULL;
850 }
851
852 static struct output_driver *
xr_pdf_create(struct file_handle * fh,enum settings_output_devices device_type,struct string_map * o)853 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
854 struct string_map *o)
855 {
856 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PDF);
857 fh_unref (fh);
858 return od ;
859 }
860
861 static struct output_driver *
xr_ps_create(struct file_handle * fh,enum settings_output_devices device_type,struct string_map * o)862 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
863 struct string_map *o)
864 {
865 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PS);
866 fh_unref (fh);
867 return od ;
868 }
869
870 static struct output_driver *
xr_svg_create(struct file_handle * fh,enum settings_output_devices device_type,struct string_map * o)871 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
872 struct string_map *o)
873 {
874 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_SVG);
875 fh_unref (fh);
876 return od ;
877 }
878
879 static void
xr_destroy(struct output_driver * driver)880 xr_destroy (struct output_driver *driver)
881 {
882 struct xr_driver *xr = xr_driver_cast (driver);
883 size_t i;
884
885 xr_driver_destroy_fsm (xr);
886
887 if (xr->cairo != NULL)
888 {
889 cairo_surface_finish (xr->surface);
890 cairo_status_t status = cairo_status (xr->cairo);
891 if (status != CAIRO_STATUS_SUCCESS)
892 fprintf (stderr, _("error drawing output for %s driver: %s"),
893 output_driver_get_name (driver),
894 cairo_status_to_string (status));
895 cairo_surface_destroy (xr->surface);
896
897 cairo_destroy (xr->cairo);
898 }
899
900 for (i = 0; i < XR_N_FONTS; i++)
901 {
902 struct xr_font *font = &xr->fonts[i];
903
904 if (font->desc != NULL)
905 pango_font_description_free (font->desc);
906 if (font->layout != NULL)
907 g_object_unref (font->layout);
908 }
909
910 free (xr->params);
911 free (xr);
912 }
913
914 static void
xr_flush(struct output_driver * driver)915 xr_flush (struct output_driver *driver)
916 {
917 struct xr_driver *xr = xr_driver_cast (driver);
918
919 cairo_surface_flush (cairo_get_target (xr->cairo));
920 }
921
922 static void
xr_update_page_setup(struct output_driver * driver,const struct page_setup * ps)923 xr_update_page_setup (struct output_driver *driver,
924 const struct page_setup *ps)
925 {
926 struct xr_driver *xr = xr_driver_cast (driver);
927
928 xr->initial_page_number = ps->initial_page_number;
929 xr->object_spacing = ps->object_spacing * 72 * XR_POINT;
930
931 if (xr->cairo)
932 return;
933
934 int usable[TABLE_N_AXES];
935 for (int i = 0; i < 2; i++)
936 usable[i] = (ps->paper[i]
937 - (ps->margins[i][0] + ps->margins[i][1])) * 72 * XR_POINT;
938
939 int headings_height[2];
940 usable[V] -= xr_measure_headings (
941 xr->surface, xr->fonts[XR_FONT_PROPORTIONAL].desc, ps->headings,
942 usable[H], xr->object_spacing, headings_height);
943
944 enum table_axis h = ps->orientation == PAGE_LANDSCAPE;
945 enum table_axis v = !h;
946 if (!xr_check_fonts (xr->surface, xr->fonts, usable[h], usable[v]))
947 return;
948
949 for (int i = 0; i < 2; i++)
950 {
951 page_heading_uninit (&xr->headings[i]);
952 page_heading_copy (&xr->headings[i], &ps->headings[i]);
953 xr->headings_height[i] = headings_height[i];
954 }
955 xr->width = usable[h];
956 xr->length = usable[v];
957 xr->left_margin = ps->margins[h][0] * 72 * XR_POINT;
958 xr->right_margin = ps->margins[h][1] * 72 * XR_POINT;
959 xr->top_margin = ps->margins[v][0] * 72 * XR_POINT;
960 xr->bottom_margin = ps->margins[v][1] * 72 * XR_POINT;
961 cairo_pdf_surface_set_size (xr->surface,
962 ps->paper[h] * 72.0, ps->paper[v] * 72.0);
963 }
964
965 static void
xr_submit(struct output_driver * driver,const struct output_item * output_item)966 xr_submit (struct output_driver *driver, const struct output_item *output_item)
967 {
968 struct xr_driver *xr = xr_driver_cast (driver);
969
970 if (is_page_setup_item (output_item))
971 {
972 xr_update_page_setup (driver,
973 to_page_setup_item (output_item)->page_setup);
974 return;
975 }
976
977 if (!xr->cairo)
978 {
979 xr->page_number = xr->initial_page_number - 1;
980 xr_set_cairo (xr, cairo_create (xr->surface));
981 cairo_save (xr->cairo);
982 xr_driver_next_page (xr, xr->cairo);
983 }
984
985 xr_driver_output_item (xr, output_item);
986 while (xr_driver_need_new_page (xr))
987 {
988 cairo_restore (xr->cairo);
989 cairo_show_page (xr->cairo);
990 cairo_save (xr->cairo);
991 xr_driver_next_page (xr, xr->cairo);
992 }
993 }
994
995 /* Functions for rendering a series of output items to a series of Cairo
996 contexts, with pagination.
997
998 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
999 its underlying implementation.
1000
1001 See the big comment in cairo.h for intended usage. */
1002
1003 /* Gives new page CAIRO to XR for output. */
1004 void
xr_driver_next_page(struct xr_driver * xr,cairo_t * cairo)1005 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
1006 {
1007 cairo_save (cairo);
1008 cairo_set_source_rgb (cairo,
1009 xr->bg.r / 255.0, xr->bg.g / 255.0, xr->bg.b / 255.0);
1010 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
1011 cairo_fill (cairo);
1012 cairo_restore (cairo);
1013
1014 cairo_translate (cairo,
1015 xr_to_pt (xr->left_margin),
1016 xr_to_pt (xr->top_margin + xr->headings_height[0]));
1017
1018 xr->page_number++;
1019 xr->cairo = cairo;
1020 xr->x = xr->y = 0;
1021
1022 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1023 &xr->headings[0], xr->page_number, xr->width, true,
1024 -xr->headings_height[0]);
1025 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1026 &xr->headings[1], xr->page_number, xr->width, true,
1027 xr->length);
1028
1029 xr_driver_run_fsm (xr);
1030 }
1031
1032 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
1033 rendering a previous output item, that is, only if xr_driver_need_new_page()
1034 returns false. */
1035 void
xr_driver_output_item(struct xr_driver * xr,const struct output_item * output_item)1036 xr_driver_output_item (struct xr_driver *xr,
1037 const struct output_item *output_item)
1038 {
1039 assert (xr->fsm == NULL);
1040 xr->fsm = xr_render_output_item (xr, output_item);
1041 xr_driver_run_fsm (xr);
1042 }
1043
1044 /* Returns true if XR is in the middle of rendering an output item and needs a
1045 new page to be appended using xr_driver_next_page() to make progress,
1046 otherwise false. */
1047 bool
xr_driver_need_new_page(const struct xr_driver * xr)1048 xr_driver_need_new_page (const struct xr_driver *xr)
1049 {
1050 return xr->fsm != NULL;
1051 }
1052
1053 /* Returns true if the current page doesn't have any content yet. */
1054 bool
xr_driver_is_page_blank(const struct xr_driver * xr)1055 xr_driver_is_page_blank (const struct xr_driver *xr)
1056 {
1057 return xr->y == 0;
1058 }
1059
1060 static void
xr_driver_destroy_fsm(struct xr_driver * xr)1061 xr_driver_destroy_fsm (struct xr_driver *xr)
1062 {
1063 if (xr->fsm != NULL)
1064 {
1065 xr->fsm->destroy (xr->fsm);
1066 xr->fsm = NULL;
1067 }
1068 }
1069
1070 static void
xr_driver_run_fsm(struct xr_driver * xr)1071 xr_driver_run_fsm (struct xr_driver *xr)
1072 {
1073 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
1074 xr_driver_destroy_fsm (xr);
1075 }
1076
1077 static void
1078 xr_layout_cell (struct xr_driver *, const struct table_cell *,
1079 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1080 int *width, int *height, int *brk);
1081
1082 static void
set_source_rgba(cairo_t * cairo,const struct cell_color * color)1083 set_source_rgba (cairo_t *cairo, const struct cell_color *color)
1084 {
1085 cairo_set_source_rgba (cairo,
1086 color->r / 255., color->g / 255., color->b / 255.,
1087 color->alpha / 255.);
1088 }
1089
1090 static void
dump_line(struct xr_driver * xr,int x0,int y0,int x1,int y1,int style,const struct cell_color * color)1091 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
1092 const struct cell_color *color)
1093 {
1094 cairo_new_path (xr->cairo);
1095 set_source_rgba (xr->cairo, color);
1096 cairo_set_line_width (
1097 xr->cairo,
1098 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
1099 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
1100 : XR_LINE_WIDTH));
1101 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
1102 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
1103 cairo_stroke (xr->cairo);
1104 }
1105
1106 static void UNUSED
dump_rectangle(struct xr_driver * xr,int x0,int y0,int x1,int y1)1107 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1108 {
1109 cairo_new_path (xr->cairo);
1110 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1111 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
1112 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
1113 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
1114 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
1115 cairo_close_path (xr->cairo);
1116 cairo_stroke (xr->cairo);
1117 }
1118
1119 static void
fill_rectangle(struct xr_driver * xr,int x0,int y0,int x1,int y1)1120 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1121 {
1122 cairo_new_path (xr->cairo);
1123 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1124 cairo_rectangle (xr->cairo,
1125 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
1126 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
1127 cairo_fill (xr->cairo);
1128 }
1129
1130 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
1131 shortening it to X0...X1 if SHORTEN is true.
1132 Draws a horizontal line X1...X3 at Y if RIGHT says so,
1133 shortening it to X2...X3 if SHORTEN is true. */
1134 static void
horz_line(struct xr_driver * xr,int x0,int x1,int x2,int x3,int y,enum render_line_style left,enum render_line_style right,const struct cell_color * left_color,const struct cell_color * right_color,bool shorten)1135 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
1136 enum render_line_style left, enum render_line_style right,
1137 const struct cell_color *left_color,
1138 const struct cell_color *right_color,
1139 bool shorten)
1140 {
1141 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
1142 && cell_color_equal (left_color, right_color))
1143 dump_line (xr, x0, y, x3, y, left, left_color);
1144 else
1145 {
1146 if (left != RENDER_LINE_NONE)
1147 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
1148 if (right != RENDER_LINE_NONE)
1149 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
1150 }
1151 }
1152
1153 /* Draws a vertical line Y0...Y2 at X if TOP says so,
1154 shortening it to Y0...Y1 if SHORTEN is true.
1155 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
1156 shortening it to Y2...Y3 if SHORTEN is true. */
1157 static void
vert_line(struct xr_driver * xr,int y0,int y1,int y2,int y3,int x,enum render_line_style top,enum render_line_style bottom,const struct cell_color * top_color,const struct cell_color * bottom_color,bool shorten)1158 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
1159 enum render_line_style top, enum render_line_style bottom,
1160 const struct cell_color *top_color,
1161 const struct cell_color *bottom_color,
1162 bool shorten)
1163 {
1164 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
1165 && cell_color_equal (top_color, bottom_color))
1166 dump_line (xr, x, y0, x, y3, top, top_color);
1167 else
1168 {
1169 if (top != RENDER_LINE_NONE)
1170 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
1171 if (bottom != RENDER_LINE_NONE)
1172 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
1173 }
1174 }
1175
1176 static void
xr_draw_line(void * xr_,int bb[TABLE_N_AXES][2],enum render_line_style styles[TABLE_N_AXES][2],struct cell_color colors[TABLE_N_AXES][2])1177 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
1178 enum render_line_style styles[TABLE_N_AXES][2],
1179 struct cell_color colors[TABLE_N_AXES][2])
1180 {
1181 const int x0 = bb[H][0];
1182 const int y0 = bb[V][0];
1183 const int x3 = bb[H][1];
1184 const int y3 = bb[V][1];
1185 const int top = styles[H][0];
1186 const int bottom = styles[H][1];
1187
1188 int start_side = render_direction_rtl();
1189 int end_side = !start_side;
1190 const int start_of_line = styles[V][start_side];
1191 const int end_of_line = styles[V][end_side];
1192 const struct cell_color *top_color = &colors[H][0];
1193 const struct cell_color *bottom_color = &colors[H][1];
1194 const struct cell_color *start_color = &colors[V][start_side];
1195 const struct cell_color *end_color = &colors[V][end_side];
1196
1197 /* The algorithm here is somewhat subtle, to allow it to handle
1198 all the kinds of intersections that we need.
1199
1200 Three additional ordinates are assigned along the x axis. The
1201 first is xc, midway between x0 and x3. The others are x1 and
1202 x2; for a single vertical line these are equal to xc, and for
1203 a double vertical line they are the ordinates of the left and
1204 right half of the double line.
1205
1206 yc, y1, and y2 are assigned similarly along the y axis.
1207
1208 The following diagram shows the coordinate system and output
1209 for double top and bottom lines, single left line, and no
1210 right line:
1211
1212 x0 x1 xc x2 x3
1213 y0 ________________________
1214 | # # |
1215 | # # |
1216 | # # |
1217 | # # |
1218 | # # |
1219 y1 = y2 = yc |######### # |
1220 | # # |
1221 | # # |
1222 | # # |
1223 | # # |
1224 y3 |________#_____#_______|
1225 */
1226 struct xr_driver *xr = xr_;
1227
1228 /* Offset from center of each line in a pair of double lines. */
1229 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
1230
1231 /* Are the lines along each axis single or double?
1232 (It doesn't make sense to have different kinds of line on the
1233 same axis, so we don't try to gracefully handle that case.) */
1234 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
1235 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
1236
1237 /* When horizontal lines are doubled,
1238 the left-side line along y1 normally runs from x0 to x2,
1239 and the right-side line along y1 from x3 to x1.
1240 If the top-side line is also doubled, we shorten the y1 lines,
1241 so that the left-side line runs only to x1,
1242 and the right-side line only to x2.
1243 Otherwise, the horizontal line at y = y1 below would cut off
1244 the intersection, which looks ugly:
1245 x0 x1 x2 x3
1246 y0 ________________________
1247 | # # |
1248 | # # |
1249 | # # |
1250 | # # |
1251 y1 |######### ########|
1252 | |
1253 | |
1254 y2 |######################|
1255 | |
1256 | |
1257 y3 |______________________|
1258 It is more of a judgment call when the horizontal line is
1259 single. We actually choose to cut off the line anyhow, as
1260 shown in the first diagram above.
1261 */
1262 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
1263 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
1264 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
1265 int horz_line_ofs = double_vert ? double_line_ofs : 0;
1266 int xc = (x0 + x3) / 2;
1267 int x1 = xc - horz_line_ofs;
1268 int x2 = xc + horz_line_ofs;
1269
1270 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
1271 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
1272 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
1273 int vert_line_ofs = double_horz ? double_line_ofs : 0;
1274 int yc = (y0 + y3) / 2;
1275 int y1 = yc - vert_line_ofs;
1276 int y2 = yc + vert_line_ofs;
1277
1278 if (!double_horz)
1279 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
1280 start_color, end_color, shorten_yc_line);
1281 else
1282 {
1283 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
1284 start_color, end_color, shorten_y1_lines);
1285 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
1286 start_color, end_color, shorten_y2_lines);
1287 }
1288
1289 if (!double_vert)
1290 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
1291 shorten_xc_line);
1292 else
1293 {
1294 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
1295 shorten_x1_lines);
1296 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
1297 shorten_x2_lines);
1298 }
1299 }
1300
1301 static void
xr_measure_cell_width(void * xr_,const struct table_cell * cell,int * min_width,int * max_width)1302 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
1303 int *min_width, int *max_width)
1304 {
1305 struct xr_driver *xr = xr_;
1306 int bb[TABLE_N_AXES][2];
1307 int clip[TABLE_N_AXES][2];
1308 int h;
1309
1310 bb[H][0] = 0;
1311 bb[H][1] = INT_MAX;
1312 bb[V][0] = 0;
1313 bb[V][1] = INT_MAX;
1314 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1315 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
1316
1317 bb[H][1] = 1;
1318 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
1319
1320 if (*min_width > 0)
1321 *min_width += px_to_xr (cell->style->cell_style.margin[H][0]
1322 + cell->style->cell_style.margin[H][1]);
1323 if (*max_width > 0)
1324 *max_width += px_to_xr (cell->style->cell_style.margin[H][0]
1325 + cell->style->cell_style.margin[H][1]);
1326 }
1327
1328 static int
xr_measure_cell_height(void * xr_,const struct table_cell * cell,int width)1329 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
1330 {
1331 struct xr_driver *xr = xr_;
1332 int bb[TABLE_N_AXES][2];
1333 int clip[TABLE_N_AXES][2];
1334 int w, h;
1335
1336 bb[H][0] = 0;
1337 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1338 + cell->style->cell_style.margin[H][1]);
1339 bb[V][0] = 0;
1340 bb[V][1] = INT_MAX;
1341 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1342 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
1343 h += px_to_xr (cell->style->cell_style.margin[V][0]
1344 + cell->style->cell_style.margin[V][1]);
1345 return h;
1346 }
1347
1348 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
1349
1350 static void
xr_draw_cell(void * xr_,const struct table_cell * cell,int color_idx,int bb[TABLE_N_AXES][2],int spill[TABLE_N_AXES][2],int clip[TABLE_N_AXES][2])1351 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
1352 int bb[TABLE_N_AXES][2],
1353 int spill[TABLE_N_AXES][2],
1354 int clip[TABLE_N_AXES][2])
1355 {
1356 struct xr_driver *xr = xr_;
1357 int w, h, brk;
1358
1359 cairo_save (xr->cairo);
1360 int bg_clip[TABLE_N_AXES][2];
1361 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1362 {
1363 bg_clip[axis][0] = clip[axis][0];
1364 if (bb[axis][0] == clip[axis][0])
1365 bg_clip[axis][0] -= spill[axis][0];
1366
1367 bg_clip[axis][1] = clip[axis][1];
1368 if (bb[axis][1] == clip[axis][1])
1369 bg_clip[axis][1] += spill[axis][1];
1370 }
1371 xr_clip (xr, bg_clip);
1372 set_source_rgba (xr->cairo, &cell->style->font_style.bg[color_idx]);
1373 fill_rectangle (xr,
1374 bb[H][0] - spill[H][0],
1375 bb[V][0] - spill[V][0],
1376 bb[H][1] + spill[H][1],
1377 bb[V][1] + spill[V][1]);
1378 cairo_restore (xr->cairo);
1379
1380 cairo_save (xr->cairo);
1381 set_source_rgba (xr->cairo, &cell->style->font_style.fg[color_idx]);
1382
1383 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1384 {
1385 bb[axis][0] += px_to_xr (cell->style->cell_style.margin[axis][0]);
1386 bb[axis][1] -= px_to_xr (cell->style->cell_style.margin[axis][1]);
1387 }
1388 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
1389 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1390 cairo_restore (xr->cairo);
1391 }
1392
1393 static int
xr_adjust_break(void * xr_,const struct table_cell * cell,int width,int height)1394 xr_adjust_break (void *xr_, const struct table_cell *cell,
1395 int width, int height)
1396 {
1397 struct xr_driver *xr = xr_;
1398 int bb[TABLE_N_AXES][2];
1399 int clip[TABLE_N_AXES][2];
1400 int w, h, brk;
1401
1402 if (xr_measure_cell_height (xr_, cell, width) < height)
1403 return -1;
1404
1405 bb[H][0] = 0;
1406 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1407 + cell->style->cell_style.margin[H][1]);
1408 if (bb[H][1] <= 0)
1409 return 0;
1410 bb[V][0] = 0;
1411 bb[V][1] = height - px_to_xr (cell->style->cell_style.margin[V][0]
1412 + cell->style->cell_style.margin[V][1]);
1413 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1414 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1415 return brk;
1416 }
1417
1418 static void
xr_clip(struct xr_driver * xr,int clip[TABLE_N_AXES][2])1419 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1420 {
1421 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1422 {
1423 double x0 = xr_to_pt (clip[H][0] + xr->x);
1424 double y0 = xr_to_pt (clip[V][0] + xr->y);
1425 double x1 = xr_to_pt (clip[H][1] + xr->x);
1426 double y1 = xr_to_pt (clip[V][1] + xr->y);
1427
1428 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1429 cairo_clip (xr->cairo);
1430 }
1431 }
1432
1433 static void
add_attr(PangoAttrList * list,PangoAttribute * attr,guint start_index,guint end_index)1434 add_attr (PangoAttrList *list, PangoAttribute *attr,
1435 guint start_index, guint end_index)
1436 {
1437 attr->start_index = start_index;
1438 attr->end_index = end_index;
1439 pango_attr_list_insert (list, attr);
1440 }
1441
1442 static void
markup_escape(struct string * out,unsigned int options,const char * in,size_t len)1443 markup_escape (struct string *out, unsigned int options,
1444 const char *in, size_t len)
1445 {
1446 if (!(options & TAB_MARKUP))
1447 {
1448 ds_put_substring (out, ss_buffer (in, len == -1 ? strlen (in) : len));
1449 return;
1450 }
1451
1452 while (len-- > 0)
1453 {
1454 int c = *in++;
1455 switch (c)
1456 {
1457 case 0:
1458 return;
1459 case '&':
1460 ds_put_cstr (out, "&");
1461 break;
1462 case '<':
1463 ds_put_cstr (out, "<");
1464 break;
1465 case '>':
1466 ds_put_cstr (out, ">");
1467 break;
1468 default:
1469 ds_put_byte (out, c);
1470 break;
1471 }
1472 }
1473 }
1474
1475 static int
get_layout_dimension(PangoLayout * layout,enum table_axis axis)1476 get_layout_dimension (PangoLayout *layout, enum table_axis axis)
1477 {
1478 int size[TABLE_N_AXES];
1479 pango_layout_get_size (layout, &size[H], &size[V]);
1480 return size[axis];
1481 }
1482
1483 static int
xr_layout_cell_text(struct xr_driver * xr,const struct table_cell * cell,int bb[TABLE_N_AXES][2],int clip[TABLE_N_AXES][2],int * widthp,int * brk)1484 xr_layout_cell_text (struct xr_driver *xr, const struct table_cell *cell,
1485 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1486 int *widthp, int *brk)
1487 {
1488 const struct font_style *font_style = &cell->style->font_style;
1489 const struct cell_style *cell_style = &cell->style->cell_style;
1490 unsigned int options = cell->options;
1491
1492 enum table_axis X = options & TAB_ROTATE ? V : H;
1493 enum table_axis Y = !X;
1494 int R = options & TAB_ROTATE ? 0 : 1;
1495
1496 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1497 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1498 struct xr_font local_font;
1499 if (font_style->typeface)
1500 {
1501 PangoFontDescription *desc = parse_font (
1502 font_style->typeface,
1503 font_style->size ? font_style->size * 1000 * xr->font_scale : 10000,
1504 font_style->bold, font_style->italic);
1505 if (desc)
1506 {
1507 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1508 pango_layout_set_font_description (layout, desc);
1509
1510 local_font.desc = desc;
1511 local_font.layout = layout;
1512 font = &local_font;
1513 }
1514 }
1515
1516 const char *text = cell->text;
1517 enum table_halign halign = table_halign_interpret (
1518 cell_style->halign, cell->options & TAB_NUMERIC);
1519 if (cell_style->halign == TABLE_HALIGN_DECIMAL && !(options & TAB_ROTATE))
1520 {
1521 int margin_adjustment = -px_to_xr (cell_style->decimal_offset);
1522
1523 const char *decimal = strrchr (text, cell_style->decimal_char);
1524 if (decimal)
1525 {
1526 pango_layout_set_text (font->layout, decimal, strlen (decimal));
1527 pango_layout_set_width (font->layout, -1);
1528 margin_adjustment += get_layout_dimension (font->layout, H);
1529 }
1530
1531 if (margin_adjustment < 0)
1532 bb[H][1] += margin_adjustment;
1533 }
1534
1535 struct string tmp = DS_EMPTY_INITIALIZER;
1536 PangoAttrList *attrs = NULL;
1537
1538 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1539 Pango's implementation of it): it will break after a period or a comma
1540 that precedes a digit, e.g. in ".000" it will break after the period.
1541 This code looks for such a situation and inserts a U+2060 WORD JOINER
1542 to prevent the break.
1543
1544 This isn't necessary when the decimal point is between two digits
1545 (e.g. "0.000" won't be broken) or when the display width is not limited so
1546 that word wrapping won't happen.
1547
1548 It isn't necessary to look for more than one period or comma, as would
1549 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1550 are present then there will always be a digit on both sides of every
1551 period and comma. */
1552 if (options & TAB_MARKUP)
1553 {
1554 PangoAttrList *new_attrs;
1555 char *new_text;
1556 if (pango_parse_markup (text, -1, 0, &new_attrs, &new_text, NULL, NULL))
1557 {
1558 attrs = new_attrs;
1559 tmp.ss = ss_cstr (new_text);
1560 tmp.capacity = tmp.ss.length;
1561 }
1562 else
1563 {
1564 /* XXX should we report the error? */
1565 ds_put_cstr (&tmp, text);
1566 }
1567 }
1568 else if (options & TAB_ROTATE || bb[H][1] != INT_MAX)
1569 {
1570 const char *decimal = text + strcspn (text, ".,");
1571 if (decimal[0]
1572 && c_isdigit (decimal[1])
1573 && (decimal == text || !c_isdigit (decimal[-1])))
1574 {
1575 ds_extend (&tmp, strlen (text) + 16);
1576 markup_escape (&tmp, options, text, decimal - text + 1);
1577 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1578 markup_escape (&tmp, options, decimal + 1, -1);
1579 }
1580 }
1581
1582 if (font_style->underline)
1583 {
1584 if (!attrs)
1585 attrs = pango_attr_list_new ();
1586 pango_attr_list_insert (attrs, pango_attr_underline_new (
1587 PANGO_UNDERLINE_SINGLE));
1588 }
1589
1590 if (cell->n_footnotes || cell->n_subscripts || cell->superscript)
1591 {
1592 /* If we haven't already put TEXT into tmp, do it now. */
1593 if (ds_is_empty (&tmp))
1594 {
1595 ds_extend (&tmp, strlen (text) + 16);
1596 markup_escape (&tmp, options, text, -1);
1597 }
1598
1599 size_t subscript_ofs = ds_length (&tmp);
1600 for (size_t i = 0; i < cell->n_subscripts; i++)
1601 {
1602 if (i)
1603 ds_put_byte (&tmp, ',');
1604 ds_put_cstr (&tmp, cell->subscripts[i]);
1605 }
1606
1607 size_t superscript_ofs = ds_length (&tmp);
1608 if (cell->superscript)
1609 ds_put_cstr (&tmp, cell->superscript);
1610
1611 size_t footnote_ofs = ds_length (&tmp);
1612 for (size_t i = 0; i < cell->n_footnotes; i++)
1613 {
1614 if (i)
1615 ds_put_byte (&tmp, ',');
1616 ds_put_cstr (&tmp, cell->footnotes[i]->marker);
1617 }
1618
1619 /* Allow footnote markers to occupy the right margin. That way, numbers
1620 in the column are still aligned. */
1621 if (cell->n_footnotes && halign == TABLE_HALIGN_RIGHT)
1622 {
1623 /* Measure the width of the footnote marker, so we know how much we
1624 need to make room for. */
1625 pango_layout_set_text (font->layout, ds_cstr (&tmp) + footnote_ofs,
1626 ds_length (&tmp) - footnote_ofs);
1627
1628 PangoAttrList *fn_attrs = pango_attr_list_new ();
1629 pango_attr_list_insert (
1630 fn_attrs, pango_attr_scale_new (PANGO_SCALE_SMALL));
1631 pango_attr_list_insert (fn_attrs, pango_attr_rise_new (3000));
1632 pango_layout_set_attributes (font->layout, fn_attrs);
1633 pango_attr_list_unref (fn_attrs);
1634 int footnote_width = get_layout_dimension (font->layout, X);
1635
1636 /* Bound the adjustment by the width of the right margin. */
1637 int right_margin = px_to_xr (cell_style->margin[X][R]);
1638 int footnote_adjustment = MIN (footnote_width, right_margin);
1639
1640 /* Adjust the bounding box. */
1641 if (options & TAB_ROTATE)
1642 footnote_adjustment = -footnote_adjustment;
1643 bb[X][R] += footnote_adjustment;
1644
1645 /* Clean up. */
1646 pango_layout_set_attributes (font->layout, NULL);
1647 }
1648
1649 /* Set attributes. */
1650 if (!attrs)
1651 attrs = pango_attr_list_new ();
1652 add_attr (attrs, pango_attr_font_desc_new (font->desc), subscript_ofs,
1653 PANGO_ATTR_INDEX_TO_TEXT_END);
1654 add_attr (attrs, pango_attr_scale_new (PANGO_SCALE_SMALL),
1655 subscript_ofs, PANGO_ATTR_INDEX_TO_TEXT_END);
1656 if (cell->n_subscripts)
1657 add_attr (attrs, pango_attr_rise_new (-3000), subscript_ofs,
1658 superscript_ofs - subscript_ofs);
1659 if (cell->superscript || cell->n_footnotes)
1660 add_attr (attrs, pango_attr_rise_new (3000), superscript_ofs,
1661 PANGO_ATTR_INDEX_TO_TEXT_END);
1662 }
1663
1664 /* Set the attributes, if any. */
1665 if (attrs)
1666 {
1667 pango_layout_set_attributes (font->layout, attrs);
1668 pango_attr_list_unref (attrs);
1669 }
1670
1671 /* Set the text. */
1672 if (ds_is_empty (&tmp))
1673 pango_layout_set_text (font->layout, text, -1);
1674 else
1675 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1676 ds_destroy (&tmp);
1677
1678 pango_layout_set_alignment (font->layout,
1679 (halign == TABLE_HALIGN_RIGHT ? PANGO_ALIGN_RIGHT
1680 : halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
1681 : PANGO_ALIGN_CENTER));
1682 pango_layout_set_width (
1683 font->layout,
1684 bb[X][1] == INT_MAX ? -1 : xr_to_pango (bb[X][1] - bb[X][0]));
1685 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1686
1687 if (clip[H][0] != clip[H][1])
1688 {
1689 cairo_save (xr->cairo);
1690 if (!(options & TAB_ROTATE))
1691 xr_clip (xr, clip);
1692 if (options & TAB_ROTATE)
1693 {
1694 cairo_translate (xr->cairo,
1695 xr_to_pt (bb[H][0] + xr->x),
1696 xr_to_pt (bb[V][1] + xr->y));
1697 cairo_rotate (xr->cairo, -M_PI_2);
1698 }
1699 else
1700 cairo_translate (xr->cairo,
1701 xr_to_pt (bb[H][0] + xr->x),
1702 xr_to_pt (bb[V][0] + xr->y));
1703 pango_cairo_show_layout (xr->cairo, font->layout);
1704
1705 /* If enabled, this draws a blue rectangle around the extents of each
1706 line of text, which can be rather useful for debugging layout
1707 issues. */
1708 if (0)
1709 {
1710 PangoLayoutIter *iter;
1711 iter = pango_layout_get_iter (font->layout);
1712 do
1713 {
1714 PangoRectangle extents;
1715
1716 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1717 cairo_save (xr->cairo);
1718 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1719 dump_rectangle (xr,
1720 pango_to_xr (extents.x) - xr->x,
1721 pango_to_xr (extents.y) - xr->y,
1722 pango_to_xr (extents.x + extents.width) - xr->x,
1723 pango_to_xr (extents.y + extents.height) - xr->y);
1724 cairo_restore (xr->cairo);
1725 }
1726 while (pango_layout_iter_next_line (iter));
1727 pango_layout_iter_free (iter);
1728 }
1729
1730 cairo_restore (xr->cairo);
1731 }
1732
1733 int size[TABLE_N_AXES];
1734 pango_layout_get_size (font->layout, &size[H], &size[V]);
1735 int w = pango_to_xr (size[X]);
1736 int h = pango_to_xr (size[Y]);
1737 if (w > *widthp)
1738 *widthp = w;
1739 if (bb[V][0] + h >= bb[V][1] && !(options & TAB_ROTATE))
1740 {
1741 PangoLayoutIter *iter;
1742 int best = 0;
1743
1744 /* Choose a breakpoint between lines instead of in the middle of one. */
1745 iter = pango_layout_get_iter (font->layout);
1746 do
1747 {
1748 PangoRectangle extents;
1749 int y0, y1;
1750 int bottom;
1751
1752 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1753 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1754 extents.x = pango_to_xr (extents.x);
1755 extents.y = pango_to_xr (y0);
1756 extents.width = pango_to_xr (extents.width);
1757 extents.height = pango_to_xr (y1 - y0);
1758 bottom = bb[V][0] + extents.y + extents.height;
1759 if (bottom < bb[V][1])
1760 {
1761 if (brk && clip[H][0] != clip[H][1])
1762 best = bottom;
1763 if (brk)
1764 *brk = bottom;
1765 }
1766 else
1767 break;
1768 }
1769 while (pango_layout_iter_next_line (iter));
1770 pango_layout_iter_free (iter);
1771
1772 /* If enabled, draws a green line across the chosen breakpoint, which can
1773 be useful for debugging issues with breaking. */
1774 if (0)
1775 {
1776 if (best && !xr->nest)
1777 dump_line (xr, -xr->left_margin, best,
1778 xr->width + xr->right_margin, best,
1779 RENDER_LINE_SINGLE,
1780 &(struct cell_color) CELL_COLOR (0, 255, 0));
1781 }
1782 }
1783
1784 pango_layout_set_attributes (font->layout, NULL);
1785
1786 if (font == &local_font)
1787 {
1788 g_object_unref (G_OBJECT (font->layout));
1789 pango_font_description_free (font->desc);
1790 }
1791
1792 return h;
1793 }
1794
1795 static void
xr_layout_cell(struct xr_driver * xr,const struct table_cell * cell,int bb[TABLE_N_AXES][2],int clip[TABLE_N_AXES][2],int * width,int * height,int * brk)1796 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1797 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1798 int *width, int *height, int *brk)
1799 {
1800 *width = 0;
1801 *height = 0;
1802
1803 /* If enabled, draws a blue rectangle around the cell extents, which can be
1804 useful for debugging layout. */
1805 if (0)
1806 {
1807 if (clip[H][0] != clip[H][1])
1808 {
1809 int offset = (xr->nest) * XR_POINT;
1810
1811 cairo_save (xr->cairo);
1812 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1813 dump_rectangle (xr,
1814 bb[H][0] + offset, bb[V][0] + offset,
1815 bb[H][1] - offset, bb[V][1] - offset);
1816 cairo_restore (xr->cairo);
1817 }
1818 }
1819
1820 if (brk)
1821 *brk = bb[V][0];
1822 *height = xr_layout_cell_text (xr, cell, bb, clip, width, brk);
1823 }
1824
1825 struct output_driver_factory pdf_driver_factory =
1826 { "pdf", "pspp.pdf", xr_pdf_create };
1827 struct output_driver_factory ps_driver_factory =
1828 { "ps", "pspp.ps", xr_ps_create };
1829 struct output_driver_factory svg_driver_factory =
1830 { "svg", "pspp.svg", xr_svg_create };
1831
1832 static const struct output_driver_class cairo_driver_class =
1833 {
1834 "cairo",
1835 xr_destroy,
1836 xr_submit,
1837 xr_flush,
1838 };
1839
1840 /* GUI rendering helpers. */
1841
1842 struct xr_rendering
1843 {
1844 struct output_item *item;
1845
1846 /* Table items. */
1847 struct render_pager *p;
1848 struct xr_driver *xr;
1849 };
1850
1851 #define CHART_WIDTH 500
1852 #define CHART_HEIGHT 375
1853
1854
1855
1856 struct xr_driver *
xr_driver_create(cairo_t * cairo,struct string_map * options)1857 xr_driver_create (cairo_t *cairo, struct string_map *options)
1858 {
1859 struct xr_driver *xr = xr_allocate ("cairo", 0, options, 1.0);
1860 xr_set_cairo (xr, cairo);
1861 return xr;
1862 }
1863
1864 /* Destroy XR, which should have been created with xr_driver_create(). Any
1865 cairo_t added to XR is not destroyed, because it is owned by the client. */
1866 void
xr_driver_destroy(struct xr_driver * xr)1867 xr_driver_destroy (struct xr_driver *xr)
1868 {
1869 if (xr != NULL)
1870 {
1871 xr->cairo = NULL;
1872 output_driver_destroy (&xr->driver);
1873 }
1874 }
1875
1876 static struct xr_rendering *
xr_rendering_create_text(struct xr_driver * xr,const char * text,cairo_t * cr)1877 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1878 {
1879 struct table_item *table_item;
1880 struct xr_rendering *r;
1881
1882 table_item = table_item_create (table_from_string (text), NULL, NULL);
1883 r = xr_rendering_create (xr, &table_item->output_item, cr);
1884 table_item_unref (table_item);
1885
1886 return r;
1887 }
1888
1889 void
xr_rendering_apply_options(struct xr_rendering * xr,struct string_map * o)1890 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1891 {
1892 if (is_table_item (xr->item))
1893 apply_options (xr->xr, o);
1894 }
1895
1896 struct xr_rendering *
xr_rendering_create(struct xr_driver * xr,const struct output_item * item,cairo_t * cr)1897 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1898 cairo_t *cr)
1899 {
1900 struct xr_rendering *r = NULL;
1901
1902 if (is_text_item (item))
1903 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1904 cr);
1905 else if (is_message_item (item))
1906 {
1907 const struct message_item *message_item = to_message_item (item);
1908 char *s = msg_to_string (message_item_get_msg (message_item));
1909 r = xr_rendering_create_text (xr, s, cr);
1910 free (s);
1911 }
1912 else if (is_table_item (item))
1913 {
1914 r = xzalloc (sizeof *r);
1915 r->item = output_item_ref (item);
1916 r->xr = xr;
1917 xr_set_cairo (xr, cr);
1918 r->p = render_pager_create (xr->params, to_table_item (item));
1919 }
1920 else if (is_chart_item (item))
1921 {
1922 r = xzalloc (sizeof *r);
1923 r->item = output_item_ref (item);
1924 }
1925 else if (is_group_open_item (item))
1926 r = xr_rendering_create_text (xr, to_group_open_item (item)->command_name,
1927 cr);
1928
1929 return r;
1930 }
1931
1932 void
xr_rendering_destroy(struct xr_rendering * r)1933 xr_rendering_destroy (struct xr_rendering *r)
1934 {
1935 if (r)
1936 {
1937 output_item_unref (r->item);
1938 render_pager_destroy (r->p);
1939 free (r);
1940 }
1941 }
1942
1943 void
xr_rendering_measure(const struct xr_rendering * r,int * wp,int * hp)1944 xr_rendering_measure (const struct xr_rendering *r, int *wp, int *hp)
1945 {
1946 int w, h;
1947
1948 if (is_table_item (r->item))
1949 {
1950 w = render_pager_get_size (r->p, H) / XR_POINT;
1951 h = render_pager_get_size (r->p, V) / XR_POINT;
1952 }
1953 else
1954 {
1955 w = CHART_WIDTH;
1956 h = CHART_HEIGHT;
1957 }
1958
1959 if (wp)
1960 *wp = w;
1961 if (hp)
1962 *hp = h;
1963 }
1964
1965 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1966 double x, double y, double width, double height);
1967
1968 /* Draws onto CR */
1969 void
xr_rendering_draw(struct xr_rendering * r,cairo_t * cr,int x0,int y0,int x1,int y1)1970 xr_rendering_draw (struct xr_rendering *r, cairo_t *cr,
1971 int x0, int y0, int x1, int y1)
1972 {
1973 if (is_table_item (r->item))
1974 {
1975 struct xr_driver *xr = r->xr;
1976
1977 xr_set_cairo (xr, cr);
1978
1979 render_pager_draw_region (r->p, x0 * XR_POINT, y0 * XR_POINT,
1980 (x1 - x0) * XR_POINT, (y1 - y0) * XR_POINT);
1981 }
1982 else
1983 xr_draw_chart (to_chart_item (r->item), cr,
1984 0, 0, CHART_WIDTH, CHART_HEIGHT);
1985 }
1986
1987 static void
xr_draw_chart(const struct chart_item * chart_item,cairo_t * cr,double x,double y,double width,double height)1988 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1989 double x, double y, double width, double height)
1990 {
1991 struct xrchart_geometry geom;
1992
1993 cairo_save (cr);
1994 cairo_translate (cr, x, y + height);
1995 cairo_scale (cr, 1.0, -1.0);
1996 xrchart_geometry_init (cr, &geom, width, height);
1997 if (is_boxplot (chart_item))
1998 xrchart_draw_boxplot (chart_item, cr, &geom);
1999 else if (is_histogram_chart (chart_item))
2000 xrchart_draw_histogram (chart_item, cr, &geom);
2001 else if (is_np_plot_chart (chart_item))
2002 xrchart_draw_np_plot (chart_item, cr, &geom);
2003 else if (is_piechart (chart_item))
2004 xrchart_draw_piechart (chart_item, cr, &geom);
2005 else if (is_barchart (chart_item))
2006 xrchart_draw_barchart (chart_item, cr, &geom);
2007 else if (is_roc_chart (chart_item))
2008 xrchart_draw_roc (chart_item, cr, &geom);
2009 else if (is_scree (chart_item))
2010 xrchart_draw_scree (chart_item, cr, &geom);
2011 else if (is_spreadlevel_plot_chart (chart_item))
2012 xrchart_draw_spreadlevel (chart_item, cr, &geom);
2013 else if (is_scatterplot_chart (chart_item))
2014 xrchart_draw_scatterplot (chart_item, cr, &geom);
2015 else
2016 NOT_REACHED ();
2017 xrchart_geometry_free (cr, &geom);
2018
2019 cairo_restore (cr);
2020 }
2021
2022 char *
xr_draw_png_chart(const struct chart_item * item,const char * file_name_template,int number,const struct cell_color * fg,const struct cell_color * bg)2023 xr_draw_png_chart (const struct chart_item *item,
2024 const char *file_name_template, int number,
2025 const struct cell_color *fg,
2026 const struct cell_color *bg)
2027 {
2028 const int width = 640;
2029 const int length = 480;
2030
2031 cairo_surface_t *surface;
2032 cairo_status_t status;
2033 const char *number_pos;
2034 char *file_name;
2035 cairo_t *cr;
2036
2037 number_pos = strchr (file_name_template, '#');
2038 if (number_pos != NULL)
2039 file_name = xasprintf ("%.*s%d%s", (int) (number_pos - file_name_template),
2040 file_name_template, number, number_pos + 1);
2041 else
2042 file_name = xstrdup (file_name_template);
2043
2044 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
2045 cr = cairo_create (surface);
2046
2047 cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
2048 cairo_paint (cr);
2049
2050 cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
2051
2052 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
2053
2054 status = cairo_surface_write_to_png (surface, file_name);
2055 if (status != CAIRO_STATUS_SUCCESS)
2056 msg (ME, _("error writing output file `%s': %s"),
2057 file_name, cairo_status_to_string (status));
2058
2059 cairo_destroy (cr);
2060 cairo_surface_destroy (surface);
2061
2062 return file_name;
2063 }
2064
2065 struct xr_table_state
2066 {
2067 struct xr_render_fsm fsm;
2068 struct render_pager *p;
2069 };
2070
2071 static bool
xr_table_render(struct xr_render_fsm * fsm,struct xr_driver * xr)2072 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2073 {
2074 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2075
2076 while (render_pager_has_next (ts->p))
2077 {
2078 int used;
2079
2080 used = render_pager_draw_next (ts->p, xr->length - xr->y);
2081 if (!used)
2082 {
2083 assert (xr->y > 0);
2084 return true;
2085 }
2086 else
2087 xr->y += used;
2088 }
2089 return false;
2090 }
2091
2092 static void
xr_table_destroy(struct xr_render_fsm * fsm)2093 xr_table_destroy (struct xr_render_fsm *fsm)
2094 {
2095 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2096
2097 render_pager_destroy (ts->p);
2098 free (ts);
2099 }
2100
2101 static struct xr_render_fsm *
xr_render_table(struct xr_driver * xr,struct table_item * table_item)2102 xr_render_table (struct xr_driver *xr, struct table_item *table_item)
2103 {
2104 struct xr_table_state *ts;
2105
2106 ts = xmalloc (sizeof *ts);
2107 ts->fsm.render = xr_table_render;
2108 ts->fsm.destroy = xr_table_destroy;
2109
2110 if (xr->y > 0)
2111 xr->y += xr->char_height;
2112
2113 ts->p = render_pager_create (xr->params, table_item);
2114 table_item_unref (table_item);
2115
2116 return &ts->fsm;
2117 }
2118
2119 struct xr_chart_state
2120 {
2121 struct xr_render_fsm fsm;
2122 struct chart_item *chart_item;
2123 };
2124
2125 static bool
xr_chart_render(struct xr_render_fsm * fsm,struct xr_driver * xr)2126 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2127 {
2128 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2129
2130 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
2131
2132 if (xr->y > xr->length - chart_height)
2133 return true;
2134
2135 if (xr->cairo != NULL)
2136 {
2137 xr_draw_chart (cs->chart_item, xr->cairo,
2138 0.0,
2139 xr_to_pt (xr->y),
2140 xr_to_pt (xr->width),
2141 xr_to_pt (chart_height));
2142 }
2143 xr->y += chart_height;
2144
2145 return false;
2146 }
2147
2148 static void
xr_chart_destroy(struct xr_render_fsm * fsm)2149 xr_chart_destroy (struct xr_render_fsm *fsm)
2150 {
2151 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2152
2153 chart_item_unref (cs->chart_item);
2154 free (cs);
2155 }
2156
2157 static struct xr_render_fsm *
xr_render_chart(const struct chart_item * chart_item)2158 xr_render_chart (const struct chart_item *chart_item)
2159 {
2160 struct xr_chart_state *cs;
2161
2162 cs = xmalloc (sizeof *cs);
2163 cs->fsm.render = xr_chart_render;
2164 cs->fsm.destroy = xr_chart_destroy;
2165 cs->chart_item = chart_item_ref (chart_item);
2166
2167 return &cs->fsm;
2168 }
2169
2170 static bool
xr_eject_render(struct xr_render_fsm * fsm UNUSED,struct xr_driver * xr)2171 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
2172 {
2173 return xr->y > 0;
2174 }
2175
2176 static void
xr_eject_destroy(struct xr_render_fsm * fsm UNUSED)2177 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
2178 {
2179 /* Nothing to do. */
2180 }
2181
2182 static struct xr_render_fsm *
xr_render_eject(void)2183 xr_render_eject (void)
2184 {
2185 static struct xr_render_fsm eject_renderer =
2186 {
2187 xr_eject_render,
2188 xr_eject_destroy
2189 };
2190
2191 return &eject_renderer;
2192 }
2193
2194 static struct xr_render_fsm *
xr_render_text(struct xr_driver * xr,const struct text_item * text_item)2195 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
2196 {
2197 enum text_item_type type = text_item_get_type (text_item);
2198 const char *text = text_item_get_text (text_item);
2199
2200 switch (type)
2201 {
2202 case TEXT_ITEM_PAGE_TITLE:
2203 string_map_replace (&xr->heading_vars, "PageTitle", text);
2204 break;
2205
2206 case TEXT_ITEM_EJECT_PAGE:
2207 if (xr->y > 0)
2208 return xr_render_eject ();
2209 break;
2210
2211 default:
2212 return xr_render_table (
2213 xr, text_item_to_table_item (text_item_ref (text_item)));
2214 }
2215
2216 return NULL;
2217 }
2218
2219 static struct xr_render_fsm *
xr_render_message(struct xr_driver * xr,const struct message_item * message_item)2220 xr_render_message (struct xr_driver *xr,
2221 const struct message_item *message_item)
2222 {
2223 char *s = msg_to_string (message_item_get_msg (message_item));
2224 struct text_item *item = text_item_create (TEXT_ITEM_LOG, s);
2225 free (s);
2226 return xr_render_table (xr, text_item_to_table_item (item));
2227 }
2228
2229 static struct xr_render_fsm *
xr_render_output_item(struct xr_driver * xr,const struct output_item * output_item)2230 xr_render_output_item (struct xr_driver *xr,
2231 const struct output_item *output_item)
2232 {
2233 if (is_table_item (output_item))
2234 return xr_render_table (xr, table_item_ref (to_table_item (output_item)));
2235 else if (is_chart_item (output_item))
2236 return xr_render_chart (to_chart_item (output_item));
2237 else if (is_text_item (output_item))
2238 return xr_render_text (xr, to_text_item (output_item));
2239 else if (is_message_item (output_item))
2240 return xr_render_message (xr, to_message_item (output_item));
2241 else
2242 return NULL;
2243 }
2244