1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Free Software Foundation, Inc.
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.
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.
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/>. */
19 #include "output/cairo.h"
21 #include "libpspp/assertion.h"
22 #include "libpspp/cast.h"
23 #include "libpspp/message.h"
24 #include "libpspp/pool.h"
25 #include "libpspp/start-date.h"
26 #include "libpspp/str.h"
27 #include "libpspp/string-map.h"
28 #include "libpspp/version.h"
29 #include "data/file-handle-def.h"
30 #include "output/cairo-chart.h"
31 #include "output/chart-item-provider.h"
32 #include "output/charts/boxplot.h"
33 #include "output/charts/np-plot.h"
34 #include "output/charts/piechart.h"
35 #include "output/charts/barchart.h"
36 #include "output/charts/plot-hist.h"
37 #include "output/charts/roc-chart.h"
38 #include "output/charts/spreadlevel-plot.h"
39 #include "output/charts/scree.h"
40 #include "output/charts/scatterplot.h"
41 #include "output/driver-provider.h"
42 #include "output/group-item.h"
43 #include "output/message-item.h"
44 #include "output/options.h"
45 #include "output/render.h"
46 #include "output/tab.h"
47 #include "output/table-item.h"
48 #include "output/table.h"
49 #include "output/text-item.h"
51 #include <cairo/cairo-pdf.h>
52 #include <cairo/cairo-ps.h>
53 #include <cairo/cairo-svg.h>
54 #include <cairo/cairo.h>
56 #include <pango/pango-font.h>
57 #include <pango/pango-layout.h>
58 #include <pango/pango.h>
59 #include <pango/pangocairo.h>
62 #include "gl/c-ctype.h"
63 #include "gl/c-strcase.h"
64 #include "gl/intprops.h"
65 #include "gl/minmax.h"
66 #include "gl/xalloc.h"
69 #define _(msgid) gettext (msgid)
71 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
75 /* The unit used for internal measurements is inch/(72 * XR_POINT).
76 (Thus, XR_POINT units represent one point.) */
77 #define XR_POINT PANGO_SCALE
79 /* Conversions to and from points. */
83 return x / (double) XR_POINT;
86 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
90 return x * (PANGO_SCALE * 72 / 96);
93 /* Dimensions for drawing lines in tables. */
94 #define XR_LINE_WIDTH (XR_POINT / 2) /* Width of an ordinary line. */
95 #define XR_LINE_SPACE XR_POINT /* Space between double lines. */
108 XR_FONT_PROPORTIONAL,
114 /* A font for use with Cairo. */
117 PangoFontDescription *desc;
121 /* An output item whose rendering is in progress. */
124 /* Renders as much of itself as it can on the current page. Returns true
125 if rendering is complete, false if the output item needs another
127 bool (*render) (struct xr_render_fsm *, struct xr_driver *);
129 /* Destroys the output item. */
130 void (*destroy) (struct xr_render_fsm *);
133 /* Cairo output driver. */
136 struct output_driver driver;
138 /* User parameters. */
139 struct xr_font fonts[XR_N_FONTS];
141 int width; /* Page width minus margins. */
142 int length; /* Page length minus margins and header. */
144 int left_margin; /* Left margin in inch/(72 * XR_POINT). */
145 int right_margin; /* Right margin in inch/(72 * XR_POINT). */
146 int top_margin; /* Top margin in inch/(72 * XR_POINT). */
147 int bottom_margin; /* Bottom margin in inch/(72 * XR_POINT). */
149 int line_space; /* Space between lines. */
150 int line_width; /* Width of lines. */
152 int min_break[TABLE_N_AXES]; /* Min cell size to break across pages. */
154 struct xr_color bg; /* Background color */
155 struct xr_color fg; /* Foreground color */
157 /* Internal state. */
158 struct render_params *params;
159 int char_width, char_height;
164 int page_number; /* Current page number. */
166 struct xr_render_fsm *fsm;
170 static const struct output_driver_class cairo_driver_class;
172 static void xr_driver_destroy_fsm (struct xr_driver *);
173 static void xr_driver_run_fsm (struct xr_driver *);
175 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
176 enum render_line_style styles[TABLE_N_AXES][2],
177 struct cell_color colors[TABLE_N_AXES][2]);
178 static void xr_measure_cell_width (void *, const struct table_cell *,
180 static int xr_measure_cell_height (void *, const struct table_cell *,
182 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
183 int bb[TABLE_N_AXES][2],
184 int spill[TABLE_N_AXES][2],
185 int clip[TABLE_N_AXES][2]);
186 static int xr_adjust_break (void *, const struct table_cell *,
187 int width, int height);
189 static struct xr_render_fsm *xr_render_output_item (
190 struct xr_driver *, const struct output_item *);
192 /* Output driver basics. */
194 static struct xr_driver *
195 xr_driver_cast (struct output_driver *driver)
197 assert (driver->class == &cairo_driver_class);
198 return UP_CAST (driver, struct xr_driver, driver);
201 static struct driver_option *
202 opt (struct output_driver *d, struct string_map *options, const char *key,
203 const char *default_value)
205 return driver_option_get (d, options, key, default_value);
208 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
209 Currently, the input string must be of the form "#RRRRGGGGBBBB"
210 Future implementations might allow things like "yellow" and
211 "sky-blue-ultra-brown"
214 parse_color (struct output_driver *d, struct string_map *options,
215 const char *key, const char *default_value,
216 struct xr_color *color)
218 int red, green, blue;
219 char *string = parse_string (opt (d, options, key, default_value));
221 if (3 != sscanf (string, "#%04x%04x%04x", &red, &green, &blue))
223 /* If the parsed option string fails, then try the default value */
224 if ( 3 != sscanf (default_value, "#%04x%04x%04x", &red, &green, &blue))
226 /* ... and if that fails set everything to zero */
227 red = green = blue = 0;
233 /* Convert 16 bit ints to float */
234 color->red = red / (double) 0xFFFF;
235 color->green = green / (double) 0xFFFF;
236 color->blue = blue / (double) 0xFFFF;
239 static PangoFontDescription *
240 parse_font (const char *font, int default_size, bool bold, bool italic)
242 if (!c_strcasecmp (font, "Monospaced"))
245 PangoFontDescription *desc = pango_font_description_from_string (font);
249 /* If the font description didn't include an explicit font size, then set it
250 to DEFAULT_SIZE, which is in inch/72000 units. */
251 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
252 pango_font_description_set_size (desc,
253 (default_size / 1000.0) * PANGO_SCALE);
255 pango_font_description_set_weight (desc, (bold
257 : PANGO_WEIGHT_NORMAL));
258 pango_font_description_set_style (desc, (italic
260 : PANGO_STYLE_NORMAL));
265 static PangoFontDescription *
266 parse_font_option (struct output_driver *d, struct string_map *options,
267 const char *key, const char *default_value,
268 int default_size, bool bold, bool italic)
270 char *string = parse_string (opt (d, options, key, default_value));
271 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
274 msg (MW, _("`%s': bad font specification"), string);
276 /* Fall back to DEFAULT_VALUE, which had better be a valid font
278 desc = parse_font (default_value, default_size, bold, italic);
279 assert (desc != NULL);
287 apply_options (struct xr_driver *xr, struct string_map *o)
289 struct output_driver *d = &xr->driver;
291 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
292 int left_margin, right_margin;
293 int top_margin, bottom_margin;
294 int paper_width, paper_length;
296 int min_break[TABLE_N_AXES];
298 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
299 const double scale = XR_POINT / 1000.;
303 for (i = 0; i < XR_N_FONTS; i++)
305 struct xr_font *font = &xr->fonts[i];
307 if (font->desc != NULL)
308 pango_font_description_free (font->desc);
311 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
312 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
313 (d, o, "fixed-font", "monospace", font_size, false, false);
314 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
315 d, o, "prop-font", "sans serif", font_size, false, false);
316 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
317 d, o, "emph-font", "sans serif", font_size, false, true);
321 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
322 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
324 /* Get dimensions. */
325 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
326 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
327 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
328 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
329 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
331 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
332 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
334 /* Convert to inch/(XR_POINT * 72). */
335 xr->left_margin = left_margin * scale;
336 xr->right_margin = right_margin * scale;
337 xr->top_margin = top_margin * scale;
338 xr->bottom_margin = bottom_margin * scale;
339 xr->width = (paper_width - left_margin - right_margin) * scale;
340 xr->length = (paper_length - top_margin - bottom_margin) * scale;
341 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
342 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
345 static struct xr_driver *
346 xr_allocate (const char *name, int device_type, struct string_map *o)
348 struct xr_driver *xr = xzalloc (sizeof *xr);
349 struct output_driver *d = &xr->driver;
351 output_driver_init (d, &cairo_driver_class, name, device_type);
353 apply_options (xr, o);
359 pango_to_xr (int pango)
361 return (XR_POINT != PANGO_SCALE
362 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
369 return (XR_POINT != PANGO_SCALE
370 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
375 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
381 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
385 for (i = 0; i < XR_N_FONTS; i++)
387 struct xr_font *font = &xr->fonts[i];
388 int char_width, char_height;
390 font->layout = pango_cairo_create_layout (cairo);
391 pango_layout_set_font_description (font->layout, font->desc);
393 pango_layout_set_text (font->layout, "0", 1);
394 pango_layout_get_size (font->layout, &char_width, &char_height);
395 xr->char_width = MAX (xr->char_width, pango_to_xr (char_width));
396 xr->char_height = MAX (xr->char_height, pango_to_xr (char_height));
399 if (xr->params == NULL)
401 xr->params = xmalloc (sizeof *xr->params);
402 xr->params->draw_line = xr_draw_line;
403 xr->params->measure_cell_width = xr_measure_cell_width;
404 xr->params->measure_cell_height = xr_measure_cell_height;
405 xr->params->adjust_break = xr_adjust_break;
406 xr->params->draw_cell = xr_draw_cell;
407 xr->params->aux = xr;
408 xr->params->size[H] = xr->width;
409 xr->params->size[V] = xr->length;
410 xr->params->font_size[H] = xr->char_width;
411 xr->params->font_size[V] = xr->char_height;
413 int lw = XR_LINE_WIDTH;
414 int ls = XR_LINE_SPACE;
415 for (i = 0; i < TABLE_N_AXES; i++)
417 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
418 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
419 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
420 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
421 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
422 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
425 for (i = 0; i < TABLE_N_AXES; i++)
426 xr->params->min_break[i] = xr->min_break[i];
427 xr->params->supports_margins = true;
430 cairo_set_source_rgb (xr->cairo, xr->fg.red, xr->fg.green, xr->fg.blue);
435 static struct output_driver *
436 xr_create (const char *file_name, enum settings_output_devices device_type,
437 struct string_map *o, enum xr_output_type file_type)
439 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
440 struct xr_driver *xr;
441 cairo_surface_t *surface;
442 cairo_status_t status;
443 double width_pt, length_pt;
445 xr = xr_allocate (file_name, device_type, o);
447 width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
448 length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
449 if (file_type == XR_PDF)
450 surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
451 else if (file_type == XR_PS)
452 surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
453 else if (file_type == XR_SVG)
454 surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
458 status = cairo_surface_status (surface);
459 if (status != CAIRO_STATUS_SUCCESS)
461 msg (ME, _("error opening output file `%s': %s"),
462 file_name, cairo_status_to_string (status));
463 cairo_surface_destroy (surface);
467 xr->cairo = cairo_create (surface);
468 cairo_surface_destroy (surface);
470 if (!xr_set_cairo (xr, xr->cairo))
473 cairo_save (xr->cairo);
474 xr_driver_next_page (xr, xr->cairo);
476 if (xr->width / xr->char_width < MIN_WIDTH)
478 msg (ME, _("The defined page is not wide enough to hold at least %d "
479 "characters in the default font. In fact, there's only "
480 "room for %d characters."),
482 xr->width / xr->char_width);
486 if (xr->length / xr->char_height < MIN_LENGTH)
488 msg (ME, _("The defined page is not long enough to hold at least %d "
489 "lines in the default font. In fact, there's only "
490 "room for %d lines."),
492 xr->length / xr->char_height);
499 output_driver_destroy (&xr->driver);
503 static struct output_driver *
504 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
505 struct string_map *o)
507 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PDF);
512 static struct output_driver *
513 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
514 struct string_map *o)
516 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PS);
521 static struct output_driver *
522 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
523 struct string_map *o)
525 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_SVG);
531 xr_destroy (struct output_driver *driver)
533 struct xr_driver *xr = xr_driver_cast (driver);
536 xr_driver_destroy_fsm (xr);
538 if (xr->cairo != NULL)
540 cairo_status_t status;
542 cairo_surface_finish (cairo_get_target (xr->cairo));
543 status = cairo_status (xr->cairo);
544 if (status != CAIRO_STATUS_SUCCESS)
545 msg (ME, _("error drawing output for %s driver: %s"),
546 output_driver_get_name (driver),
547 cairo_status_to_string (status));
548 cairo_destroy (xr->cairo);
551 for (i = 0; i < XR_N_FONTS; i++)
553 struct xr_font *font = &xr->fonts[i];
555 if (font->desc != NULL)
556 pango_font_description_free (font->desc);
557 if (font->layout != NULL)
558 g_object_unref (font->layout);
566 xr_flush (struct output_driver *driver)
568 struct xr_driver *xr = xr_driver_cast (driver);
570 cairo_surface_flush (cairo_get_target (xr->cairo));
574 xr_submit (struct output_driver *driver, const struct output_item *output_item)
576 struct xr_driver *xr = xr_driver_cast (driver);
578 xr_driver_output_item (xr, output_item);
579 while (xr_driver_need_new_page (xr))
581 cairo_restore (xr->cairo);
582 cairo_show_page (xr->cairo);
583 cairo_save (xr->cairo);
584 xr_driver_next_page (xr, xr->cairo);
588 /* Functions for rendering a series of output items to a series of Cairo
589 contexts, with pagination.
591 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
592 its underlying implementation.
594 See the big comment in cairo.h for intended usage. */
596 /* Gives new page CAIRO to XR for output. */
598 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
601 cairo_set_source_rgb (cairo, xr->bg.red, xr->bg.green, xr->bg.blue);
602 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
604 cairo_restore (cairo);
606 cairo_translate (cairo,
607 xr_to_pt (xr->left_margin),
608 xr_to_pt (xr->top_margin));
613 xr_driver_run_fsm (xr);
616 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
617 rendering a previous output item, that is, only if xr_driver_need_new_page()
620 xr_driver_output_item (struct xr_driver *xr,
621 const struct output_item *output_item)
623 assert (xr->fsm == NULL);
624 xr->fsm = xr_render_output_item (xr, output_item);
625 xr_driver_run_fsm (xr);
628 /* Returns true if XR is in the middle of rendering an output item and needs a
629 new page to be appended using xr_driver_next_page() to make progress,
632 xr_driver_need_new_page (const struct xr_driver *xr)
634 return xr->fsm != NULL;
637 /* Returns true if the current page doesn't have any content yet. */
639 xr_driver_is_page_blank (const struct xr_driver *xr)
645 xr_driver_destroy_fsm (struct xr_driver *xr)
649 xr->fsm->destroy (xr->fsm);
655 xr_driver_run_fsm (struct xr_driver *xr)
657 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
658 xr_driver_destroy_fsm (xr);
662 xr_layout_cell (struct xr_driver *, const struct table_cell *,
663 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
664 int *width, int *height, int *brk);
667 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
668 const struct cell_color *color)
670 cairo_new_path (xr->cairo);
671 cairo_set_source_rgb (xr->cairo,
672 color->r / 255.0, color->g / 255.0, color->b / 255.0);
673 cairo_set_line_width (
675 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
676 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
678 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
679 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
680 cairo_stroke (xr->cairo);
684 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
686 cairo_new_path (xr->cairo);
687 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
688 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
689 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
690 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
691 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
692 cairo_close_path (xr->cairo);
693 cairo_stroke (xr->cairo);
697 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
699 cairo_new_path (xr->cairo);
700 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
701 cairo_rectangle (xr->cairo,
702 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
703 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
704 cairo_fill (xr->cairo);
707 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
708 shortening it to X0...X1 if SHORTEN is true.
709 Draws a horizontal line X1...X3 at Y if RIGHT says so,
710 shortening it to X2...X3 if SHORTEN is true. */
712 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
713 enum render_line_style left, enum render_line_style right,
714 const struct cell_color *left_color,
715 const struct cell_color *right_color,
718 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
719 && cell_color_equal (left_color, right_color))
720 dump_line (xr, x0, y, x3, y, left, left_color);
723 if (left != RENDER_LINE_NONE)
724 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
725 if (right != RENDER_LINE_NONE)
726 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
730 /* Draws a vertical line Y0...Y2 at X if TOP says so,
731 shortening it to Y0...Y1 if SHORTEN is true.
732 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
733 shortening it to Y2...Y3 if SHORTEN is true. */
735 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
736 enum render_line_style top, enum render_line_style bottom,
737 const struct cell_color *top_color,
738 const struct cell_color *bottom_color,
741 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
742 && cell_color_equal (top_color, bottom_color))
743 dump_line (xr, x, y0, x, y3, top, top_color);
746 if (top != RENDER_LINE_NONE)
747 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
748 if (bottom != RENDER_LINE_NONE)
749 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
754 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
755 enum render_line_style styles[TABLE_N_AXES][2],
756 struct cell_color colors[TABLE_N_AXES][2])
758 const int x0 = bb[H][0];
759 const int y0 = bb[V][0];
760 const int x3 = bb[H][1];
761 const int y3 = bb[V][1];
762 const int top = styles[H][0];
763 const int bottom = styles[H][1];
765 int start_side = render_direction_rtl();
766 int end_side = !start_side;
767 const int start_of_line = styles[V][start_side];
768 const int end_of_line = styles[V][end_side];
769 const struct cell_color *top_color = &colors[H][0];
770 const struct cell_color *bottom_color = &colors[H][1];
771 const struct cell_color *start_color = &colors[V][start_side];
772 const struct cell_color *end_color = &colors[V][end_side];
774 /* The algorithm here is somewhat subtle, to allow it to handle
775 all the kinds of intersections that we need.
777 Three additional ordinates are assigned along the x axis. The
778 first is xc, midway between x0 and x3. The others are x1 and
779 x2; for a single vertical line these are equal to xc, and for
780 a double vertical line they are the ordinates of the left and
781 right half of the double line.
783 yc, y1, and y2 are assigned similarly along the y axis.
785 The following diagram shows the coordinate system and output
786 for double top and bottom lines, single left line, and no
790 y0 ________________________
796 y1 = y2 = yc |######### # |
801 y3 |________#_____#_______|
803 struct xr_driver *xr = xr_;
805 /* Offset from center of each line in a pair of double lines. */
806 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
808 /* Are the lines along each axis single or double?
809 (It doesn't make sense to have different kinds of line on the
810 same axis, so we don't try to gracefully handle that case.) */
811 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
812 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
814 /* When horizontal lines are doubled,
815 the left-side line along y1 normally runs from x0 to x2,
816 and the right-side line along y1 from x3 to x1.
817 If the top-side line is also doubled, we shorten the y1 lines,
818 so that the left-side line runs only to x1,
819 and the right-side line only to x2.
820 Otherwise, the horizontal line at y = y1 below would cut off
821 the intersection, which looks ugly:
823 y0 ________________________
828 y1 |######### ########|
831 y2 |######################|
834 y3 |______________________|
835 It is more of a judgment call when the horizontal line is
836 single. We actually choose to cut off the line anyhow, as
837 shown in the first diagram above.
839 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
840 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
841 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
842 int horz_line_ofs = double_vert ? double_line_ofs : 0;
843 int xc = (x0 + x3) / 2;
844 int x1 = xc - horz_line_ofs;
845 int x2 = xc + horz_line_ofs;
847 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
848 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
849 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
850 int vert_line_ofs = double_horz ? double_line_ofs : 0;
851 int yc = (y0 + y3) / 2;
852 int y1 = yc - vert_line_ofs;
853 int y2 = yc + vert_line_ofs;
856 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
857 start_color, end_color, shorten_yc_line);
860 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
861 start_color, end_color, shorten_y1_lines);
862 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
863 start_color, end_color, shorten_y2_lines);
867 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
871 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
873 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
879 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
880 int *min_width, int *max_width)
882 struct xr_driver *xr = xr_;
883 int bb[TABLE_N_AXES][2];
884 int clip[TABLE_N_AXES][2];
891 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
892 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
895 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
898 *min_width += px_to_xr (cell->style->margin[H][0]
899 + cell->style->margin[H][1]);
901 *max_width += px_to_xr (cell->style->margin[H][0]
902 + cell->style->margin[H][1]);
906 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
908 struct xr_driver *xr = xr_;
909 int bb[TABLE_N_AXES][2];
910 int clip[TABLE_N_AXES][2];
914 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
915 + cell->style->margin[H][1]);
918 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
919 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
920 h += px_to_xr (cell->style->margin[V][0] + cell->style->margin[V][1]);
924 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
927 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
928 int bb[TABLE_N_AXES][2],
929 int spill[TABLE_N_AXES][2],
930 int clip[TABLE_N_AXES][2])
932 struct xr_driver *xr = xr_;
935 cairo_save (xr->cairo);
936 int bg_clip[TABLE_N_AXES][2];
937 for (int axis = 0; axis < TABLE_N_AXES; axis++)
939 bg_clip[axis][0] = clip[axis][0];
940 if (bb[axis][0] == clip[axis][0])
941 bg_clip[axis][0] -= spill[axis][0];
943 bg_clip[axis][1] = clip[axis][1];
944 if (bb[axis][1] == clip[axis][1])
945 bg_clip[axis][1] += spill[axis][1];
947 xr_clip (xr, bg_clip);
948 cairo_set_source_rgb (xr->cairo,
949 cell->style->bg[color_idx].r / 255.,
950 cell->style->bg[color_idx].g / 255.,
951 cell->style->bg[color_idx].b / 255.);
953 bb[H][0] - spill[H][0],
954 bb[V][0] - spill[V][0],
955 bb[H][1] + spill[H][1],
956 bb[V][1] + spill[V][1]);
957 cairo_restore (xr->cairo);
959 cairo_save (xr->cairo);
960 cairo_set_source_rgb (xr->cairo,
961 cell->style->fg[color_idx].r / 255.,
962 cell->style->fg[color_idx].g / 255.,
963 cell->style->fg[color_idx].b / 255.);
965 for (int axis = 0; axis < TABLE_N_AXES; axis++)
967 bb[axis][0] += px_to_xr (cell->style->margin[axis][0]);
968 bb[axis][1] -= px_to_xr (cell->style->margin[axis][1]);
970 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
971 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
972 cairo_restore (xr->cairo);
976 xr_adjust_break (void *xr_, const struct table_cell *cell,
977 int width, int height)
979 struct xr_driver *xr = xr_;
980 int bb[TABLE_N_AXES][2];
981 int clip[TABLE_N_AXES][2];
984 if (xr_measure_cell_height (xr_, cell, width) < height)
988 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
989 + cell->style->margin[H][1]);
993 bb[V][1] = height - px_to_xr (cell->style->margin[V][0]
994 + cell->style->margin[V][1]);
995 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
996 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1001 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1003 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1005 double x0 = xr_to_pt (clip[H][0] + xr->x);
1006 double y0 = xr_to_pt (clip[V][0] + xr->y);
1007 double x1 = xr_to_pt (clip[H][1] + xr->x);
1008 double y1 = xr_to_pt (clip[V][1] + xr->y);
1010 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1011 cairo_clip (xr->cairo);
1016 add_attr_with_start (PangoAttrList *list, PangoAttribute *attr, guint start_index)
1018 attr->start_index = start_index;
1019 pango_attr_list_insert (list, attr);
1023 xr_layout_cell_text (struct xr_driver *xr,
1024 const struct cell_contents *contents,
1025 const struct cell_style *style,
1026 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1027 int *widthp, int *brk)
1029 unsigned int options = contents->options;
1032 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1033 : options & TAB_EMPH ? &xr->fonts[XR_FONT_EMPHASIS]
1034 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1035 struct xr_font local_font;
1038 PangoFontDescription *desc = parse_font (
1040 style->font_size ? style->font_size * 1000 * 72 / 128 : 10000,
1041 style->bold, style->italic);
1044 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1045 pango_layout_set_font_description (layout, desc);
1047 local_font.desc = desc;
1048 local_font.layout = layout;
1053 int footnote_adjustment;
1054 if (contents->n_footnotes == 0)
1055 footnote_adjustment = 0;
1056 else if (contents->n_footnotes == 1 && (options & TAB_HALIGN) == TAB_RIGHT)
1058 PangoAttrList *attrs;
1060 const char *marker = contents->footnotes[0]->marker;
1061 pango_layout_set_text (font->layout, marker, strlen (marker));
1063 attrs = pango_attr_list_new ();
1064 pango_attr_list_insert (attrs, pango_attr_rise_new (7000));
1065 pango_layout_set_attributes (font->layout, attrs);
1066 pango_attr_list_unref (attrs);
1068 pango_layout_get_size (font->layout, &w, &h);
1069 footnote_adjustment = MIN (w, px_to_xr (style->margin[H][1]));
1072 footnote_adjustment = px_to_xr (style->margin[H][1]);
1074 struct string tmp = DS_EMPTY_INITIALIZER;
1075 const char *text = contents->text;
1077 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1078 Pango's implementation of it): it will break after a period or a comma
1079 that precedes a digit, e.g. in ".000" it will break after the period.
1080 This code looks for such a situation and inserts a U+2060 WORD JOINER
1081 to prevent the break.
1083 This isn't necessary when the decimal point is between two digits
1084 (e.g. "0.000" won't be broken) or when the display width is not limited so
1085 that word wrapping won't happen.
1087 It isn't necessary to look for more than one period or comma, as would
1088 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1089 are present then there will always be a digit on both sides of every
1090 period and comma. */
1091 if (bb[H][1] != INT_MAX)
1093 const char *decimal = text + strcspn (text, ".,");
1095 && c_isdigit (decimal[1])
1096 && (decimal == text || !c_isdigit (decimal[-1])))
1098 ds_extend (&tmp, strlen (text) + 16);
1099 ds_put_substring (&tmp, ss_buffer (text, decimal - text + 1));
1100 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1101 ds_put_cstr (&tmp, decimal + 1);
1105 if (footnote_adjustment)
1107 bb[H][1] += footnote_adjustment;
1109 if (ds_is_empty (&tmp))
1111 ds_extend (&tmp, strlen (text) + 16);
1112 ds_put_cstr (&tmp, text);
1114 size_t initial_length = ds_length (&tmp);
1116 cell_contents_format_footnote_markers (contents, &tmp);
1117 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1119 PangoAttrList *attrs = pango_attr_list_new ();
1120 if (style->underline)
1121 pango_attr_list_insert (attrs, pango_attr_underline_new (
1122 PANGO_UNDERLINE_SINGLE));
1123 add_attr_with_start (attrs, pango_attr_rise_new (7000), initial_length);
1124 add_attr_with_start (
1125 attrs, pango_attr_font_desc_new (font->desc), initial_length);
1126 pango_layout_set_attributes (font->layout, attrs);
1127 pango_attr_list_unref (attrs);
1131 const char *content = ds_is_empty (&tmp) ? text : ds_cstr (&tmp);
1132 pango_layout_set_text (font->layout, content, -1);
1134 if (style->underline)
1136 PangoAttrList *attrs = pango_attr_list_new ();
1137 pango_attr_list_insert (attrs, pango_attr_underline_new (
1138 PANGO_UNDERLINE_SINGLE));
1139 pango_layout_set_attributes (font->layout, attrs);
1140 pango_attr_list_unref (attrs);
1145 pango_layout_set_alignment (
1147 ((options & TAB_HALIGN) == TAB_RIGHT ? PANGO_ALIGN_RIGHT
1148 : (options & TAB_HALIGN) == TAB_LEFT ? PANGO_ALIGN_LEFT
1149 : PANGO_ALIGN_CENTER));
1150 pango_layout_set_width (
1152 bb[H][1] == INT_MAX ? -1 : xr_to_pango (bb[H][1] - bb[H][0]));
1153 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1155 if (clip[H][0] != clip[H][1])
1157 cairo_save (xr->cairo);
1159 cairo_translate (xr->cairo,
1160 xr_to_pt (bb[H][0] + xr->x),
1161 xr_to_pt (bb[V][0] + xr->y));
1162 pango_cairo_show_layout (xr->cairo, font->layout);
1164 /* If enabled, this draws a blue rectangle around the extents of each
1165 line of text, which can be rather useful for debugging layout
1169 PangoLayoutIter *iter;
1170 iter = pango_layout_get_iter (font->layout);
1173 PangoRectangle extents;
1175 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1176 cairo_save (xr->cairo);
1177 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1179 pango_to_xr (extents.x) - xr->x,
1180 pango_to_xr (extents.y) - xr->y,
1181 pango_to_xr (extents.x + extents.width) - xr->x,
1182 pango_to_xr (extents.y + extents.height) - xr->y);
1183 cairo_restore (xr->cairo);
1185 while (pango_layout_iter_next_line (iter));
1186 pango_layout_iter_free (iter);
1189 cairo_restore (xr->cairo);
1192 pango_layout_get_size (font->layout, &w, &h);
1193 w = pango_to_xr (w);
1194 h = pango_to_xr (h);
1197 if (bb[V][0] + h >= bb[V][1])
1199 PangoLayoutIter *iter;
1200 int best UNUSED = 0;
1202 /* Choose a breakpoint between lines instead of in the middle of one. */
1203 iter = pango_layout_get_iter (font->layout);
1206 PangoRectangle extents;
1210 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1211 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1212 extents.x = pango_to_xr (extents.x);
1213 extents.y = pango_to_xr (y0);
1214 extents.width = pango_to_xr (extents.width);
1215 extents.height = pango_to_xr (y1 - y0);
1216 bottom = bb[V][0] + extents.y + extents.height;
1217 if (bottom < bb[V][1])
1219 if (brk && clip[H][0] != clip[H][1])
1227 while (pango_layout_iter_next_line (iter));
1228 pango_layout_iter_free (iter);
1230 /* If enabled, draws a green line across the chosen breakpoint, which can
1231 be useful for debugging issues with breaking. */
1234 if (best && !xr->nest)
1235 dump_line (xr, -xr->left_margin, best,
1236 xr->width + xr->right_margin, best,
1237 RENDER_LINE_SINGLE, &CELL_COLOR (0, 255, 0));
1241 pango_layout_set_attributes (font->layout, NULL);
1243 if (font == &local_font)
1245 g_object_unref (G_OBJECT (font->layout));
1246 pango_font_description_free (font->desc);
1249 return bb[V][0] + h;
1253 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1254 int bb_[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1255 int *width, int *height, int *brk)
1257 int bb[TABLE_N_AXES][2];
1265 memcpy (bb, bb_, sizeof bb);
1267 /* If enabled, draws a blue rectangle around the cell extents, which can be
1268 useful for debugging layout. */
1271 if (clip[H][0] != clip[H][1])
1273 int offset = (xr->nest) * XR_POINT;
1275 cairo_save (xr->cairo);
1276 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1278 bb[H][0] + offset, bb[V][0] + offset,
1279 bb[H][1] - offset, bb[V][1] - offset);
1280 cairo_restore (xr->cairo);
1284 for (i = 0; i < cell->n_contents && bb[V][0] < bb[V][1]; i++)
1286 const struct cell_contents *contents = &cell->contents[i];
1292 bb[V][0] += xr->char_height / 2;
1293 if (bb[V][0] >= bb[V][1])
1299 bb[V][0] = xr_layout_cell_text (xr, contents, cell->style, bb, clip,
1302 *height = bb[V][0] - bb_[V][0];
1305 struct output_driver_factory pdf_driver_factory =
1306 { "pdf", "pspp.pdf", xr_pdf_create };
1307 struct output_driver_factory ps_driver_factory =
1308 { "ps", "pspp.ps", xr_ps_create };
1309 struct output_driver_factory svg_driver_factory =
1310 { "svg", "pspp.svg", xr_svg_create };
1312 static const struct output_driver_class cairo_driver_class =
1320 /* GUI rendering helpers. */
1324 struct output_item *item;
1327 struct render_pager *p;
1328 struct xr_driver *xr;
1331 #define CHART_WIDTH 500
1332 #define CHART_HEIGHT 375
1337 xr_driver_create (cairo_t *cairo, struct string_map *options)
1339 struct xr_driver *xr = xr_allocate ("cairo", 0, options);
1340 if (!xr_set_cairo (xr, cairo))
1342 output_driver_destroy (&xr->driver);
1348 /* Destroy XR, which should have been created with xr_driver_create(). Any
1349 cairo_t added to XR is not destroyed, because it is owned by the client. */
1351 xr_driver_destroy (struct xr_driver *xr)
1356 output_driver_destroy (&xr->driver);
1360 static struct xr_rendering *
1361 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1363 struct table_item *table_item;
1364 struct xr_rendering *r;
1366 table_item = table_item_create (table_from_string (TAB_LEFT, text),
1368 r = xr_rendering_create (xr, &table_item->output_item, cr);
1369 table_item_unref (table_item);
1375 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1377 if (is_table_item (xr->item))
1378 apply_options (xr->xr, o);
1381 struct xr_rendering *
1382 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1385 struct xr_rendering *r = NULL;
1387 if (is_text_item (item))
1388 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1390 else if (is_message_item (item))
1392 const struct message_item *message_item = to_message_item (item);
1393 char *s = msg_to_string (message_item_get_msg (message_item));
1394 r = xr_rendering_create_text (xr, s, cr);
1397 else if (is_table_item (item))
1399 r = xzalloc (sizeof *r);
1400 r->item = output_item_ref (item);
1402 xr_set_cairo (xr, cr);
1403 r->p = render_pager_create (xr->params, to_table_item (item));
1405 else if (is_chart_item (item))
1407 r = xzalloc (sizeof *r);
1408 r->item = output_item_ref (item);
1410 else if (is_group_open_item (item))
1411 r = xr_rendering_create_text (xr, to_group_open_item (item)->command_name,
1418 xr_rendering_destroy (struct xr_rendering *r)
1422 output_item_unref (r->item);
1423 render_pager_destroy (r->p);
1429 xr_rendering_measure (struct xr_rendering *r, int *w, int *h)
1431 if (is_table_item (r->item))
1433 *w = render_pager_get_size (r->p, H) / XR_POINT;
1434 *h = render_pager_get_size (r->p, V) / XR_POINT;
1443 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1444 double x, double y, double width, double height);
1448 xr_rendering_draw_all (struct xr_rendering *r, cairo_t *cr)
1450 if (is_table_item (r->item))
1452 struct xr_driver *xr = r->xr;
1454 xr_set_cairo (xr, cr);
1456 render_pager_draw (r->p);
1460 xr_draw_chart (to_chart_item (r->item), cr,
1461 0, 0, CHART_WIDTH, CHART_HEIGHT);
1465 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1466 double x, double y, double width, double height)
1468 struct xrchart_geometry geom;
1471 cairo_translate (cr, x, y + height);
1472 cairo_scale (cr, 1.0, -1.0);
1473 xrchart_geometry_init (cr, &geom, width, height);
1474 if (is_boxplot (chart_item))
1475 xrchart_draw_boxplot (chart_item, cr, &geom);
1476 else if (is_histogram_chart (chart_item))
1477 xrchart_draw_histogram (chart_item, cr, &geom);
1478 else if (is_np_plot_chart (chart_item))
1479 xrchart_draw_np_plot (chart_item, cr, &geom);
1480 else if (is_piechart (chart_item))
1481 xrchart_draw_piechart (chart_item, cr, &geom);
1482 else if (is_barchart (chart_item))
1483 xrchart_draw_barchart (chart_item, cr, &geom);
1484 else if (is_roc_chart (chart_item))
1485 xrchart_draw_roc (chart_item, cr, &geom);
1486 else if (is_scree (chart_item))
1487 xrchart_draw_scree (chart_item, cr, &geom);
1488 else if (is_spreadlevel_plot_chart (chart_item))
1489 xrchart_draw_spreadlevel (chart_item, cr, &geom);
1490 else if (is_scatterplot_chart (chart_item))
1491 xrchart_draw_scatterplot (chart_item, cr, &geom);
1494 xrchart_geometry_free (cr, &geom);
1500 xr_draw_png_chart (const struct chart_item *item,
1501 const char *file_name_template, int number,
1502 const struct xr_color *fg,
1503 const struct xr_color *bg
1506 const int width = 640;
1507 const int length = 480;
1509 cairo_surface_t *surface;
1510 cairo_status_t status;
1511 const char *number_pos;
1515 number_pos = strchr (file_name_template, '#');
1516 if (number_pos != NULL)
1517 file_name = xasprintf ("%.*s%d%s", (int) (number_pos - file_name_template),
1518 file_name_template, number, number_pos + 1);
1520 file_name = xstrdup (file_name_template);
1522 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
1523 cr = cairo_create (surface);
1525 cairo_set_source_rgb (cr, bg->red, bg->green, bg->blue);
1528 cairo_set_source_rgb (cr, fg->red, fg->green, fg->blue);
1530 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
1532 status = cairo_surface_write_to_png (surface, file_name);
1533 if (status != CAIRO_STATUS_SUCCESS)
1534 msg (ME, _("error writing output file `%s': %s"),
1535 file_name, cairo_status_to_string (status));
1538 cairo_surface_destroy (surface);
1543 struct xr_table_state
1545 struct xr_render_fsm fsm;
1546 struct table_item *table_item;
1547 struct render_pager *p;
1551 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1553 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1555 while (render_pager_has_next (ts->p))
1559 used = render_pager_draw_next (ts->p, xr->length - xr->y);
1572 xr_table_destroy (struct xr_render_fsm *fsm)
1574 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1576 table_item_unref (ts->table_item);
1577 render_pager_destroy (ts->p);
1581 static struct xr_render_fsm *
1582 xr_render_table (struct xr_driver *xr, const struct table_item *table_item)
1584 struct xr_table_state *ts;
1586 ts = xmalloc (sizeof *ts);
1587 ts->fsm.render = xr_table_render;
1588 ts->fsm.destroy = xr_table_destroy;
1589 ts->table_item = table_item_ref (table_item);
1592 xr->y += xr->char_height;
1594 ts->p = render_pager_create (xr->params, table_item);
1599 struct xr_chart_state
1601 struct xr_render_fsm fsm;
1602 struct chart_item *chart_item;
1606 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1608 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1610 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
1612 if (xr->y > xr->length - chart_height)
1615 if (xr->cairo != NULL)
1617 xr_draw_chart (cs->chart_item, xr->cairo,
1620 xr_to_pt (xr->width),
1621 xr_to_pt (chart_height));
1623 xr->y += chart_height;
1629 xr_chart_destroy (struct xr_render_fsm *fsm)
1631 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1633 chart_item_unref (cs->chart_item);
1637 static struct xr_render_fsm *
1638 xr_render_chart (const struct chart_item *chart_item)
1640 struct xr_chart_state *cs;
1642 cs = xmalloc (sizeof *cs);
1643 cs->fsm.render = xr_chart_render;
1644 cs->fsm.destroy = xr_chart_destroy;
1645 cs->chart_item = chart_item_ref (chart_item);
1651 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
1657 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
1659 /* Nothing to do. */
1662 static struct xr_render_fsm *
1663 xr_render_eject (void)
1665 static struct xr_render_fsm eject_renderer =
1671 return &eject_renderer;
1674 static struct xr_render_fsm *
1675 xr_create_text_renderer (struct xr_driver *xr, const struct text_item *item)
1677 struct tab_table *tab = tab_create (1, 1);
1679 struct cell_style *style = pool_alloc (tab->container, sizeof *style);
1680 *style = (struct cell_style) CELL_STYLE_INITIALIZER;
1682 style->font = pool_strdup (tab->container, item->font);
1683 style->font_size = item->font_size;
1684 style->bold = item->bold;
1685 style->italic = item->italic;
1686 style->underline = item->underline;
1687 tab->styles[0] = style;
1689 tab_text (tab, 0, 0, TAB_LEFT, text_item_get_text (item));
1690 struct table_item *table_item = table_item_create (&tab->table, NULL, NULL);
1691 struct xr_render_fsm *fsm = xr_render_table (xr, table_item);
1692 table_item_unref (table_item);
1697 static struct xr_render_fsm *
1698 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
1700 enum text_item_type type = text_item_get_type (text_item);
1704 case TEXT_ITEM_PAGE_TITLE:
1707 case TEXT_ITEM_BLANK_LINE:
1709 xr->y += xr->char_height;
1712 case TEXT_ITEM_EJECT_PAGE:
1714 return xr_render_eject ();
1718 return xr_create_text_renderer (xr, text_item);
1724 static struct xr_render_fsm *
1725 xr_render_message (struct xr_driver *xr,
1726 const struct message_item *message_item)
1728 char *s = msg_to_string (message_item_get_msg (message_item));
1729 struct text_item *item = text_item_create (TEXT_ITEM_PARAGRAPH, s);
1731 struct xr_render_fsm *fsm = xr_create_text_renderer (xr, item);
1732 text_item_unref (item);
1737 static struct xr_render_fsm *
1738 xr_render_output_item (struct xr_driver *xr,
1739 const struct output_item *output_item)
1741 if (is_table_item (output_item))
1742 return xr_render_table (xr, to_table_item (output_item));
1743 else if (is_chart_item (output_item))
1744 return xr_render_chart (to_chart_item (output_item));
1745 else if (is_text_item (output_item))
1746 return xr_render_text (xr, to_text_item (output_item));
1747 else if (is_message_item (output_item))
1748 return xr_render_message (xr, to_message_item (output_item));