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;
428 xr->params->rtl = render_direction_rtl ();
431 cairo_set_source_rgb (xr->cairo, xr->fg.red, xr->fg.green, xr->fg.blue);
436 static struct output_driver *
437 xr_create (const char *file_name, enum settings_output_devices device_type,
438 struct string_map *o, enum xr_output_type file_type)
440 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
441 struct xr_driver *xr;
442 cairo_surface_t *surface;
443 cairo_status_t status;
444 double width_pt, length_pt;
446 xr = xr_allocate (file_name, device_type, o);
448 width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
449 length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
450 if (file_type == XR_PDF)
451 surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
452 else if (file_type == XR_PS)
453 surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
454 else if (file_type == XR_SVG)
455 surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
459 status = cairo_surface_status (surface);
460 if (status != CAIRO_STATUS_SUCCESS)
462 msg (ME, _("error opening output file `%s': %s"),
463 file_name, cairo_status_to_string (status));
464 cairo_surface_destroy (surface);
468 xr->cairo = cairo_create (surface);
469 cairo_surface_destroy (surface);
471 if (!xr_set_cairo (xr, xr->cairo))
474 cairo_save (xr->cairo);
475 xr_driver_next_page (xr, xr->cairo);
477 if (xr->width / xr->char_width < MIN_WIDTH)
479 msg (ME, _("The defined page is not wide enough to hold at least %d "
480 "characters in the default font. In fact, there's only "
481 "room for %d characters."),
483 xr->width / xr->char_width);
487 if (xr->length / xr->char_height < MIN_LENGTH)
489 msg (ME, _("The defined page is not long enough to hold at least %d "
490 "lines in the default font. In fact, there's only "
491 "room for %d lines."),
493 xr->length / xr->char_height);
500 output_driver_destroy (&xr->driver);
504 static struct output_driver *
505 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
506 struct string_map *o)
508 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PDF);
513 static struct output_driver *
514 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
515 struct string_map *o)
517 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PS);
522 static struct output_driver *
523 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
524 struct string_map *o)
526 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_SVG);
532 xr_destroy (struct output_driver *driver)
534 struct xr_driver *xr = xr_driver_cast (driver);
537 xr_driver_destroy_fsm (xr);
539 if (xr->cairo != NULL)
541 cairo_status_t status;
543 cairo_surface_finish (cairo_get_target (xr->cairo));
544 status = cairo_status (xr->cairo);
545 if (status != CAIRO_STATUS_SUCCESS)
546 msg (ME, _("error drawing output for %s driver: %s"),
547 output_driver_get_name (driver),
548 cairo_status_to_string (status));
549 cairo_destroy (xr->cairo);
552 for (i = 0; i < XR_N_FONTS; i++)
554 struct xr_font *font = &xr->fonts[i];
556 if (font->desc != NULL)
557 pango_font_description_free (font->desc);
558 if (font->layout != NULL)
559 g_object_unref (font->layout);
567 xr_flush (struct output_driver *driver)
569 struct xr_driver *xr = xr_driver_cast (driver);
571 cairo_surface_flush (cairo_get_target (xr->cairo));
575 xr_submit (struct output_driver *driver, const struct output_item *output_item)
577 struct xr_driver *xr = xr_driver_cast (driver);
579 xr_driver_output_item (xr, output_item);
580 while (xr_driver_need_new_page (xr))
582 cairo_restore (xr->cairo);
583 cairo_show_page (xr->cairo);
584 cairo_save (xr->cairo);
585 xr_driver_next_page (xr, xr->cairo);
589 /* Functions for rendering a series of output items to a series of Cairo
590 contexts, with pagination.
592 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
593 its underlying implementation.
595 See the big comment in cairo.h for intended usage. */
597 /* Gives new page CAIRO to XR for output. */
599 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
602 cairo_set_source_rgb (cairo, xr->bg.red, xr->bg.green, xr->bg.blue);
603 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
605 cairo_restore (cairo);
607 cairo_translate (cairo,
608 xr_to_pt (xr->left_margin),
609 xr_to_pt (xr->top_margin));
614 xr_driver_run_fsm (xr);
617 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
618 rendering a previous output item, that is, only if xr_driver_need_new_page()
621 xr_driver_output_item (struct xr_driver *xr,
622 const struct output_item *output_item)
624 assert (xr->fsm == NULL);
625 xr->fsm = xr_render_output_item (xr, output_item);
626 xr_driver_run_fsm (xr);
629 /* Returns true if XR is in the middle of rendering an output item and needs a
630 new page to be appended using xr_driver_next_page() to make progress,
633 xr_driver_need_new_page (const struct xr_driver *xr)
635 return xr->fsm != NULL;
638 /* Returns true if the current page doesn't have any content yet. */
640 xr_driver_is_page_blank (const struct xr_driver *xr)
646 xr_driver_destroy_fsm (struct xr_driver *xr)
650 xr->fsm->destroy (xr->fsm);
656 xr_driver_run_fsm (struct xr_driver *xr)
658 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
659 xr_driver_destroy_fsm (xr);
663 xr_layout_cell (struct xr_driver *, const struct table_cell *,
664 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
665 int *width, int *height, int *brk);
668 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
669 const struct cell_color *color)
671 cairo_new_path (xr->cairo);
672 cairo_set_source_rgb (xr->cairo,
673 color->r / 255.0, color->g / 255.0, color->b / 255.0);
674 cairo_set_line_width (
676 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
677 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
679 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
680 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
681 cairo_stroke (xr->cairo);
685 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
687 cairo_new_path (xr->cairo);
688 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
689 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
690 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
691 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
692 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
693 cairo_close_path (xr->cairo);
694 cairo_stroke (xr->cairo);
698 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
700 cairo_new_path (xr->cairo);
701 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
702 cairo_rectangle (xr->cairo,
703 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
704 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
705 cairo_fill (xr->cairo);
708 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
709 shortening it to X0...X1 if SHORTEN is true.
710 Draws a horizontal line X1...X3 at Y if RIGHT says so,
711 shortening it to X2...X3 if SHORTEN is true. */
713 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
714 enum render_line_style left, enum render_line_style right,
715 const struct cell_color *left_color,
716 const struct cell_color *right_color,
719 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
720 && cell_color_equal (left_color, right_color))
721 dump_line (xr, x0, y, x3, y, left, left_color);
724 if (left != RENDER_LINE_NONE)
725 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
726 if (right != RENDER_LINE_NONE)
727 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
731 /* Draws a vertical line Y0...Y2 at X if TOP says so,
732 shortening it to Y0...Y1 if SHORTEN is true.
733 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
734 shortening it to Y2...Y3 if SHORTEN is true. */
736 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
737 enum render_line_style top, enum render_line_style bottom,
738 const struct cell_color *top_color,
739 const struct cell_color *bottom_color,
742 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
743 && cell_color_equal (top_color, bottom_color))
744 dump_line (xr, x, y0, x, y3, top, top_color);
747 if (top != RENDER_LINE_NONE)
748 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
749 if (bottom != RENDER_LINE_NONE)
750 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
755 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
756 enum render_line_style styles[TABLE_N_AXES][2],
757 struct cell_color colors[TABLE_N_AXES][2])
759 const int x0 = bb[H][0];
760 const int y0 = bb[V][0];
761 const int x3 = bb[H][1];
762 const int y3 = bb[V][1];
763 const int top = styles[H][0];
764 const int bottom = styles[H][1];
766 int start_side = render_direction_rtl();
767 int end_side = !start_side;
768 const int start_of_line = styles[V][start_side];
769 const int end_of_line = styles[V][end_side];
770 const struct cell_color *top_color = &colors[H][0];
771 const struct cell_color *bottom_color = &colors[H][1];
772 const struct cell_color *start_color = &colors[V][start_side];
773 const struct cell_color *end_color = &colors[V][end_side];
775 /* The algorithm here is somewhat subtle, to allow it to handle
776 all the kinds of intersections that we need.
778 Three additional ordinates are assigned along the x axis. The
779 first is xc, midway between x0 and x3. The others are x1 and
780 x2; for a single vertical line these are equal to xc, and for
781 a double vertical line they are the ordinates of the left and
782 right half of the double line.
784 yc, y1, and y2 are assigned similarly along the y axis.
786 The following diagram shows the coordinate system and output
787 for double top and bottom lines, single left line, and no
791 y0 ________________________
797 y1 = y2 = yc |######### # |
802 y3 |________#_____#_______|
804 struct xr_driver *xr = xr_;
806 /* Offset from center of each line in a pair of double lines. */
807 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
809 /* Are the lines along each axis single or double?
810 (It doesn't make sense to have different kinds of line on the
811 same axis, so we don't try to gracefully handle that case.) */
812 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
813 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
815 /* When horizontal lines are doubled,
816 the left-side line along y1 normally runs from x0 to x2,
817 and the right-side line along y1 from x3 to x1.
818 If the top-side line is also doubled, we shorten the y1 lines,
819 so that the left-side line runs only to x1,
820 and the right-side line only to x2.
821 Otherwise, the horizontal line at y = y1 below would cut off
822 the intersection, which looks ugly:
824 y0 ________________________
829 y1 |######### ########|
832 y2 |######################|
835 y3 |______________________|
836 It is more of a judgment call when the horizontal line is
837 single. We actually choose to cut off the line anyhow, as
838 shown in the first diagram above.
840 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
841 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
842 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
843 int horz_line_ofs = double_vert ? double_line_ofs : 0;
844 int xc = (x0 + x3) / 2;
845 int x1 = xc - horz_line_ofs;
846 int x2 = xc + horz_line_ofs;
848 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
849 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
850 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
851 int vert_line_ofs = double_horz ? double_line_ofs : 0;
852 int yc = (y0 + y3) / 2;
853 int y1 = yc - vert_line_ofs;
854 int y2 = yc + vert_line_ofs;
857 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
858 start_color, end_color, shorten_yc_line);
861 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
862 start_color, end_color, shorten_y1_lines);
863 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
864 start_color, end_color, shorten_y2_lines);
868 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
872 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
874 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
880 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
881 int *min_width, int *max_width)
883 struct xr_driver *xr = xr_;
884 int bb[TABLE_N_AXES][2];
885 int clip[TABLE_N_AXES][2];
892 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
893 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
896 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
899 *min_width += px_to_xr (cell->style->margin[H][0]
900 + cell->style->margin[H][1]);
902 *max_width += px_to_xr (cell->style->margin[H][0]
903 + cell->style->margin[H][1]);
907 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
909 struct xr_driver *xr = xr_;
910 int bb[TABLE_N_AXES][2];
911 int clip[TABLE_N_AXES][2];
915 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
916 + cell->style->margin[H][1]);
919 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
920 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
921 h += px_to_xr (cell->style->margin[V][0] + cell->style->margin[V][1]);
925 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
928 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
929 int bb[TABLE_N_AXES][2],
930 int spill[TABLE_N_AXES][2],
931 int clip[TABLE_N_AXES][2])
933 struct xr_driver *xr = xr_;
936 cairo_save (xr->cairo);
937 int bg_clip[TABLE_N_AXES][2];
938 for (int axis = 0; axis < TABLE_N_AXES; axis++)
940 bg_clip[axis][0] = clip[axis][0];
941 if (bb[axis][0] == clip[axis][0])
942 bg_clip[axis][0] -= spill[axis][0];
944 bg_clip[axis][1] = clip[axis][1];
945 if (bb[axis][1] == clip[axis][1])
946 bg_clip[axis][1] += spill[axis][1];
948 xr_clip (xr, bg_clip);
949 cairo_set_source_rgb (xr->cairo,
950 cell->style->bg[color_idx].r / 255.,
951 cell->style->bg[color_idx].g / 255.,
952 cell->style->bg[color_idx].b / 255.);
954 bb[H][0] - spill[H][0],
955 bb[V][0] - spill[V][0],
956 bb[H][1] + spill[H][1],
957 bb[V][1] + spill[V][1]);
958 cairo_restore (xr->cairo);
960 cairo_save (xr->cairo);
961 cairo_set_source_rgb (xr->cairo,
962 cell->style->fg[color_idx].r / 255.,
963 cell->style->fg[color_idx].g / 255.,
964 cell->style->fg[color_idx].b / 255.);
966 for (int axis = 0; axis < TABLE_N_AXES; axis++)
968 bb[axis][0] += px_to_xr (cell->style->margin[axis][0]);
969 bb[axis][1] -= px_to_xr (cell->style->margin[axis][1]);
971 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
972 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
973 cairo_restore (xr->cairo);
977 xr_adjust_break (void *xr_, const struct table_cell *cell,
978 int width, int height)
980 struct xr_driver *xr = xr_;
981 int bb[TABLE_N_AXES][2];
982 int clip[TABLE_N_AXES][2];
985 if (xr_measure_cell_height (xr_, cell, width) < height)
989 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
990 + cell->style->margin[H][1]);
994 bb[V][1] = height - px_to_xr (cell->style->margin[V][0]
995 + cell->style->margin[V][1]);
996 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
997 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1002 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1004 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1006 double x0 = xr_to_pt (clip[H][0] + xr->x);
1007 double y0 = xr_to_pt (clip[V][0] + xr->y);
1008 double x1 = xr_to_pt (clip[H][1] + xr->x);
1009 double y1 = xr_to_pt (clip[V][1] + xr->y);
1011 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1012 cairo_clip (xr->cairo);
1017 add_attr_with_start (PangoAttrList *list, PangoAttribute *attr, guint start_index)
1019 attr->start_index = start_index;
1020 pango_attr_list_insert (list, attr);
1024 xr_layout_cell_text (struct xr_driver *xr,
1025 const struct cell_contents *contents,
1026 const struct cell_style *style,
1027 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1028 int *widthp, int *brk)
1030 unsigned int options = contents->options;
1033 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1034 : options & TAB_EMPH ? &xr->fonts[XR_FONT_EMPHASIS]
1035 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1036 struct xr_font local_font;
1039 PangoFontDescription *desc = parse_font (
1041 style->font_size ? style->font_size * 1000 * 72 / 128 : 10000,
1042 style->bold, style->italic);
1045 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1046 pango_layout_set_font_description (layout, desc);
1048 local_font.desc = desc;
1049 local_font.layout = layout;
1054 int footnote_adjustment;
1055 if (contents->n_footnotes == 0)
1056 footnote_adjustment = 0;
1057 else if (contents->n_footnotes == 1 && (options & TAB_HALIGN) == TAB_RIGHT)
1059 PangoAttrList *attrs;
1061 const char *marker = contents->footnotes[0]->marker;
1062 pango_layout_set_text (font->layout, marker, strlen (marker));
1064 attrs = pango_attr_list_new ();
1065 pango_attr_list_insert (attrs, pango_attr_rise_new (7000));
1066 pango_layout_set_attributes (font->layout, attrs);
1067 pango_attr_list_unref (attrs);
1069 pango_layout_get_size (font->layout, &w, &h);
1070 footnote_adjustment = MIN (w, px_to_xr (style->margin[H][1]));
1073 footnote_adjustment = px_to_xr (style->margin[H][1]);
1075 struct string tmp = DS_EMPTY_INITIALIZER;
1076 const char *text = contents->text;
1078 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1079 Pango's implementation of it): it will break after a period or a comma
1080 that precedes a digit, e.g. in ".000" it will break after the period.
1081 This code looks for such a situation and inserts a U+2060 WORD JOINER
1082 to prevent the break.
1084 This isn't necessary when the decimal point is between two digits
1085 (e.g. "0.000" won't be broken) or when the display width is not limited so
1086 that word wrapping won't happen.
1088 It isn't necessary to look for more than one period or comma, as would
1089 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1090 are present then there will always be a digit on both sides of every
1091 period and comma. */
1092 if (bb[H][1] != INT_MAX)
1094 const char *decimal = text + strcspn (text, ".,");
1096 && c_isdigit (decimal[1])
1097 && (decimal == text || !c_isdigit (decimal[-1])))
1099 ds_extend (&tmp, strlen (text) + 16);
1100 ds_put_substring (&tmp, ss_buffer (text, decimal - text + 1));
1101 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1102 ds_put_cstr (&tmp, decimal + 1);
1106 if (footnote_adjustment)
1108 bb[H][1] += footnote_adjustment;
1110 if (ds_is_empty (&tmp))
1112 ds_extend (&tmp, strlen (text) + 16);
1113 ds_put_cstr (&tmp, text);
1115 size_t initial_length = ds_length (&tmp);
1117 cell_contents_format_footnote_markers (contents, &tmp);
1118 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1120 PangoAttrList *attrs = pango_attr_list_new ();
1121 if (style->underline)
1122 pango_attr_list_insert (attrs, pango_attr_underline_new (
1123 PANGO_UNDERLINE_SINGLE));
1124 add_attr_with_start (attrs, pango_attr_rise_new (7000), initial_length);
1125 add_attr_with_start (
1126 attrs, pango_attr_font_desc_new (font->desc), initial_length);
1127 pango_layout_set_attributes (font->layout, attrs);
1128 pango_attr_list_unref (attrs);
1132 const char *content = ds_is_empty (&tmp) ? text : ds_cstr (&tmp);
1133 pango_layout_set_text (font->layout, content, -1);
1135 if (style->underline)
1137 PangoAttrList *attrs = pango_attr_list_new ();
1138 pango_attr_list_insert (attrs, pango_attr_underline_new (
1139 PANGO_UNDERLINE_SINGLE));
1140 pango_layout_set_attributes (font->layout, attrs);
1141 pango_attr_list_unref (attrs);
1146 pango_layout_set_alignment (
1148 ((options & TAB_HALIGN) == TAB_RIGHT ? PANGO_ALIGN_RIGHT
1149 : (options & TAB_HALIGN) == TAB_LEFT ? PANGO_ALIGN_LEFT
1150 : PANGO_ALIGN_CENTER));
1151 pango_layout_set_width (
1153 bb[H][1] == INT_MAX ? -1 : xr_to_pango (bb[H][1] - bb[H][0]));
1154 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1156 if (clip[H][0] != clip[H][1])
1158 cairo_save (xr->cairo);
1160 cairo_translate (xr->cairo,
1161 xr_to_pt (bb[H][0] + xr->x),
1162 xr_to_pt (bb[V][0] + xr->y));
1163 pango_cairo_show_layout (xr->cairo, font->layout);
1165 /* If enabled, this draws a blue rectangle around the extents of each
1166 line of text, which can be rather useful for debugging layout
1170 PangoLayoutIter *iter;
1171 iter = pango_layout_get_iter (font->layout);
1174 PangoRectangle extents;
1176 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1177 cairo_save (xr->cairo);
1178 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1180 pango_to_xr (extents.x) - xr->x,
1181 pango_to_xr (extents.y) - xr->y,
1182 pango_to_xr (extents.x + extents.width) - xr->x,
1183 pango_to_xr (extents.y + extents.height) - xr->y);
1184 cairo_restore (xr->cairo);
1186 while (pango_layout_iter_next_line (iter));
1187 pango_layout_iter_free (iter);
1190 cairo_restore (xr->cairo);
1193 pango_layout_get_size (font->layout, &w, &h);
1194 w = pango_to_xr (w);
1195 h = pango_to_xr (h);
1198 if (bb[V][0] + h >= bb[V][1])
1200 PangoLayoutIter *iter;
1201 int best UNUSED = 0;
1203 /* Choose a breakpoint between lines instead of in the middle of one. */
1204 iter = pango_layout_get_iter (font->layout);
1207 PangoRectangle extents;
1211 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1212 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1213 extents.x = pango_to_xr (extents.x);
1214 extents.y = pango_to_xr (y0);
1215 extents.width = pango_to_xr (extents.width);
1216 extents.height = pango_to_xr (y1 - y0);
1217 bottom = bb[V][0] + extents.y + extents.height;
1218 if (bottom < bb[V][1])
1220 if (brk && clip[H][0] != clip[H][1])
1228 while (pango_layout_iter_next_line (iter));
1229 pango_layout_iter_free (iter);
1231 /* If enabled, draws a green line across the chosen breakpoint, which can
1232 be useful for debugging issues with breaking. */
1235 if (best && !xr->nest)
1236 dump_line (xr, -xr->left_margin, best,
1237 xr->width + xr->right_margin, best,
1238 RENDER_LINE_SINGLE, &CELL_COLOR (0, 255, 0));
1242 pango_layout_set_attributes (font->layout, NULL);
1244 if (font == &local_font)
1246 g_object_unref (G_OBJECT (font->layout));
1247 pango_font_description_free (font->desc);
1250 return bb[V][0] + h;
1254 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1255 int bb_[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1256 int *width, int *height, int *brk)
1258 int bb[TABLE_N_AXES][2];
1266 memcpy (bb, bb_, sizeof bb);
1268 /* If enabled, draws a blue rectangle around the cell extents, which can be
1269 useful for debugging layout. */
1272 if (clip[H][0] != clip[H][1])
1274 int offset = (xr->nest) * XR_POINT;
1276 cairo_save (xr->cairo);
1277 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1279 bb[H][0] + offset, bb[V][0] + offset,
1280 bb[H][1] - offset, bb[V][1] - offset);
1281 cairo_restore (xr->cairo);
1285 for (i = 0; i < cell->n_contents && bb[V][0] < bb[V][1]; i++)
1287 const struct cell_contents *contents = &cell->contents[i];
1293 bb[V][0] += xr->char_height / 2;
1294 if (bb[V][0] >= bb[V][1])
1300 bb[V][0] = xr_layout_cell_text (xr, contents, cell->style, bb, clip,
1303 *height = bb[V][0] - bb_[V][0];
1306 struct output_driver_factory pdf_driver_factory =
1307 { "pdf", "pspp.pdf", xr_pdf_create };
1308 struct output_driver_factory ps_driver_factory =
1309 { "ps", "pspp.ps", xr_ps_create };
1310 struct output_driver_factory svg_driver_factory =
1311 { "svg", "pspp.svg", xr_svg_create };
1313 static const struct output_driver_class cairo_driver_class =
1321 /* GUI rendering helpers. */
1325 struct output_item *item;
1328 struct render_pager *p;
1329 struct xr_driver *xr;
1332 #define CHART_WIDTH 500
1333 #define CHART_HEIGHT 375
1338 xr_driver_create (cairo_t *cairo, struct string_map *options)
1340 struct xr_driver *xr = xr_allocate ("cairo", 0, options);
1341 if (!xr_set_cairo (xr, cairo))
1343 output_driver_destroy (&xr->driver);
1349 /* Destroy XR, which should have been created with xr_driver_create(). Any
1350 cairo_t added to XR is not destroyed, because it is owned by the client. */
1352 xr_driver_destroy (struct xr_driver *xr)
1357 output_driver_destroy (&xr->driver);
1361 static struct xr_rendering *
1362 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1364 struct table_item *table_item;
1365 struct xr_rendering *r;
1367 table_item = table_item_create (table_from_string (TAB_LEFT, text),
1369 r = xr_rendering_create (xr, &table_item->output_item, cr);
1370 table_item_unref (table_item);
1376 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1378 if (is_table_item (xr->item))
1379 apply_options (xr->xr, o);
1382 struct xr_rendering *
1383 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1386 struct xr_rendering *r = NULL;
1388 if (is_text_item (item))
1389 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1391 else if (is_message_item (item))
1393 const struct message_item *message_item = to_message_item (item);
1394 char *s = msg_to_string (message_item_get_msg (message_item));
1395 r = xr_rendering_create_text (xr, s, cr);
1398 else if (is_table_item (item))
1400 r = xzalloc (sizeof *r);
1401 r->item = output_item_ref (item);
1403 xr_set_cairo (xr, cr);
1404 r->p = render_pager_create (xr->params, to_table_item (item));
1406 else if (is_chart_item (item))
1408 r = xzalloc (sizeof *r);
1409 r->item = output_item_ref (item);
1411 else if (is_group_open_item (item))
1412 r = xr_rendering_create_text (xr, to_group_open_item (item)->command_name,
1419 xr_rendering_destroy (struct xr_rendering *r)
1423 output_item_unref (r->item);
1424 render_pager_destroy (r->p);
1430 xr_rendering_measure (struct xr_rendering *r, int *w, int *h)
1432 if (is_table_item (r->item))
1434 *w = render_pager_get_size (r->p, H) / XR_POINT;
1435 *h = render_pager_get_size (r->p, V) / XR_POINT;
1444 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1445 double x, double y, double width, double height);
1449 xr_rendering_draw_all (struct xr_rendering *r, cairo_t *cr)
1451 if (is_table_item (r->item))
1453 struct xr_driver *xr = r->xr;
1455 xr_set_cairo (xr, cr);
1457 render_pager_draw (r->p);
1461 xr_draw_chart (to_chart_item (r->item), cr,
1462 0, 0, CHART_WIDTH, CHART_HEIGHT);
1466 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1467 double x, double y, double width, double height)
1469 struct xrchart_geometry geom;
1472 cairo_translate (cr, x, y + height);
1473 cairo_scale (cr, 1.0, -1.0);
1474 xrchart_geometry_init (cr, &geom, width, height);
1475 if (is_boxplot (chart_item))
1476 xrchart_draw_boxplot (chart_item, cr, &geom);
1477 else if (is_histogram_chart (chart_item))
1478 xrchart_draw_histogram (chart_item, cr, &geom);
1479 else if (is_np_plot_chart (chart_item))
1480 xrchart_draw_np_plot (chart_item, cr, &geom);
1481 else if (is_piechart (chart_item))
1482 xrchart_draw_piechart (chart_item, cr, &geom);
1483 else if (is_barchart (chart_item))
1484 xrchart_draw_barchart (chart_item, cr, &geom);
1485 else if (is_roc_chart (chart_item))
1486 xrchart_draw_roc (chart_item, cr, &geom);
1487 else if (is_scree (chart_item))
1488 xrchart_draw_scree (chart_item, cr, &geom);
1489 else if (is_spreadlevel_plot_chart (chart_item))
1490 xrchart_draw_spreadlevel (chart_item, cr, &geom);
1491 else if (is_scatterplot_chart (chart_item))
1492 xrchart_draw_scatterplot (chart_item, cr, &geom);
1495 xrchart_geometry_free (cr, &geom);
1501 xr_draw_png_chart (const struct chart_item *item,
1502 const char *file_name_template, int number,
1503 const struct xr_color *fg,
1504 const struct xr_color *bg
1507 const int width = 640;
1508 const int length = 480;
1510 cairo_surface_t *surface;
1511 cairo_status_t status;
1512 const char *number_pos;
1516 number_pos = strchr (file_name_template, '#');
1517 if (number_pos != NULL)
1518 file_name = xasprintf ("%.*s%d%s", (int) (number_pos - file_name_template),
1519 file_name_template, number, number_pos + 1);
1521 file_name = xstrdup (file_name_template);
1523 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
1524 cr = cairo_create (surface);
1526 cairo_set_source_rgb (cr, bg->red, bg->green, bg->blue);
1529 cairo_set_source_rgb (cr, fg->red, fg->green, fg->blue);
1531 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
1533 status = cairo_surface_write_to_png (surface, file_name);
1534 if (status != CAIRO_STATUS_SUCCESS)
1535 msg (ME, _("error writing output file `%s': %s"),
1536 file_name, cairo_status_to_string (status));
1539 cairo_surface_destroy (surface);
1544 struct xr_table_state
1546 struct xr_render_fsm fsm;
1547 struct table_item *table_item;
1548 struct render_pager *p;
1552 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1554 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1556 while (render_pager_has_next (ts->p))
1560 used = render_pager_draw_next (ts->p, xr->length - xr->y);
1573 xr_table_destroy (struct xr_render_fsm *fsm)
1575 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1577 table_item_unref (ts->table_item);
1578 render_pager_destroy (ts->p);
1582 static struct xr_render_fsm *
1583 xr_render_table (struct xr_driver *xr, const struct table_item *table_item)
1585 struct xr_table_state *ts;
1587 ts = xmalloc (sizeof *ts);
1588 ts->fsm.render = xr_table_render;
1589 ts->fsm.destroy = xr_table_destroy;
1590 ts->table_item = table_item_ref (table_item);
1593 xr->y += xr->char_height;
1595 ts->p = render_pager_create (xr->params, table_item);
1600 struct xr_chart_state
1602 struct xr_render_fsm fsm;
1603 struct chart_item *chart_item;
1607 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1609 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1611 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
1613 if (xr->y > xr->length - chart_height)
1616 if (xr->cairo != NULL)
1618 xr_draw_chart (cs->chart_item, xr->cairo,
1621 xr_to_pt (xr->width),
1622 xr_to_pt (chart_height));
1624 xr->y += chart_height;
1630 xr_chart_destroy (struct xr_render_fsm *fsm)
1632 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1634 chart_item_unref (cs->chart_item);
1638 static struct xr_render_fsm *
1639 xr_render_chart (const struct chart_item *chart_item)
1641 struct xr_chart_state *cs;
1643 cs = xmalloc (sizeof *cs);
1644 cs->fsm.render = xr_chart_render;
1645 cs->fsm.destroy = xr_chart_destroy;
1646 cs->chart_item = chart_item_ref (chart_item);
1652 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
1658 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
1660 /* Nothing to do. */
1663 static struct xr_render_fsm *
1664 xr_render_eject (void)
1666 static struct xr_render_fsm eject_renderer =
1672 return &eject_renderer;
1675 static struct xr_render_fsm *
1676 xr_create_text_renderer (struct xr_driver *xr, const struct text_item *item)
1678 struct tab_table *tab = tab_create (1, 1);
1680 struct cell_style *style = pool_alloc (tab->container, sizeof *style);
1681 *style = (struct cell_style) CELL_STYLE_INITIALIZER;
1683 style->font = pool_strdup (tab->container, item->font);
1684 style->font_size = item->font_size;
1685 style->bold = item->bold;
1686 style->italic = item->italic;
1687 style->underline = item->underline;
1688 tab->styles[0] = style;
1690 tab_text (tab, 0, 0, TAB_LEFT, text_item_get_text (item));
1691 struct table_item *table_item = table_item_create (&tab->table, NULL, NULL);
1692 struct xr_render_fsm *fsm = xr_render_table (xr, table_item);
1693 table_item_unref (table_item);
1698 static struct xr_render_fsm *
1699 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
1701 enum text_item_type type = text_item_get_type (text_item);
1705 case TEXT_ITEM_PAGE_TITLE:
1708 case TEXT_ITEM_BLANK_LINE:
1710 xr->y += xr->char_height;
1713 case TEXT_ITEM_EJECT_PAGE:
1715 return xr_render_eject ();
1719 return xr_create_text_renderer (xr, text_item);
1725 static struct xr_render_fsm *
1726 xr_render_message (struct xr_driver *xr,
1727 const struct message_item *message_item)
1729 char *s = msg_to_string (message_item_get_msg (message_item));
1730 struct text_item *item = text_item_create (TEXT_ITEM_PARAGRAPH, s);
1732 struct xr_render_fsm *fsm = xr_create_text_renderer (xr, item);
1733 text_item_unref (item);
1738 static struct xr_render_fsm *
1739 xr_render_output_item (struct xr_driver *xr,
1740 const struct output_item *output_item)
1742 if (is_table_item (output_item))
1743 return xr_render_table (xr, to_table_item (output_item));
1744 else if (is_chart_item (output_item))
1745 return xr_render_chart (to_chart_item (output_item));
1746 else if (is_text_item (output_item))
1747 return xr_render_text (xr, to_text_item (output_item));
1748 else if (is_message_item (output_item))
1749 return xr_render_message (xr, to_message_item (output_item));