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/message-item.h"
43 #include "output/options.h"
44 #include "output/render.h"
45 #include "output/tab.h"
46 #include "output/table-item.h"
47 #include "output/table.h"
48 #include "output/text-item.h"
50 #include <cairo/cairo-pdf.h>
51 #include <cairo/cairo-ps.h>
52 #include <cairo/cairo-svg.h>
53 #include <cairo/cairo.h>
55 #include <pango/pango-font.h>
56 #include <pango/pango-layout.h>
57 #include <pango/pango.h>
58 #include <pango/pangocairo.h>
61 #include "gl/c-ctype.h"
62 #include "gl/c-strcase.h"
63 #include "gl/intprops.h"
64 #include "gl/minmax.h"
65 #include "gl/xalloc.h"
68 #define _(msgid) gettext (msgid)
70 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
74 /* The unit used for internal measurements is inch/(72 * XR_POINT). */
75 #define XR_POINT PANGO_SCALE
77 /* Conversions to and from points. */
81 return x / (double) XR_POINT;
84 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
88 return x * (PANGO_SCALE * 72 / 96);
91 /* Dimensions for drawing lines in tables. */
92 #define XR_LINE_WIDTH (XR_POINT / 2) /* Width of an ordinary line. */
93 #define XR_LINE_SPACE XR_POINT /* Space between double lines. */
106 XR_FONT_PROPORTIONAL,
112 /* A font for use with Cairo. */
115 PangoFontDescription *desc;
119 /* An output item whose rendering is in progress. */
122 /* Renders as much of itself as it can on the current page. Returns true
123 if rendering is complete, false if the output item needs another
125 bool (*render) (struct xr_render_fsm *, struct xr_driver *);
127 /* Destroys the output item. */
128 void (*destroy) (struct xr_render_fsm *);
131 /* Cairo output driver. */
134 struct output_driver driver;
136 /* User parameters. */
137 struct xr_font fonts[XR_N_FONTS];
139 int width; /* Page width minus margins. */
140 int length; /* Page length minus margins and header. */
142 int left_margin; /* Left margin in inch/(72 * XR_POINT). */
143 int right_margin; /* Right margin in inch/(72 * XR_POINT). */
144 int top_margin; /* Top margin in inch/(72 * XR_POINT). */
145 int bottom_margin; /* Bottom margin in inch/(72 * XR_POINT). */
147 int line_space; /* Space between lines. */
148 int line_width; /* Width of lines. */
150 int min_break[TABLE_N_AXES]; /* Min cell size to break across pages. */
152 struct xr_color bg; /* Background color */
153 struct xr_color fg; /* Foreground color */
155 /* Internal state. */
156 struct render_params *params;
157 int char_width, char_height;
162 int page_number; /* Current page number. */
164 struct xr_render_fsm *fsm;
168 static const struct output_driver_class cairo_driver_class;
170 static void xr_driver_destroy_fsm (struct xr_driver *);
171 static void xr_driver_run_fsm (struct xr_driver *);
173 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
174 enum render_line_style styles[TABLE_N_AXES][2],
175 struct cell_color colors[TABLE_N_AXES][2]);
176 static void xr_measure_cell_width (void *, const struct table_cell *,
178 static int xr_measure_cell_height (void *, const struct table_cell *,
180 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
181 int bb[TABLE_N_AXES][2],
182 int spill[TABLE_N_AXES][2],
183 int clip[TABLE_N_AXES][2]);
184 static int xr_adjust_break (void *, const struct table_cell *,
185 int width, int height);
187 static struct xr_render_fsm *xr_render_output_item (
188 struct xr_driver *, const struct output_item *);
190 /* Output driver basics. */
192 static struct xr_driver *
193 xr_driver_cast (struct output_driver *driver)
195 assert (driver->class == &cairo_driver_class);
196 return UP_CAST (driver, struct xr_driver, driver);
199 static struct driver_option *
200 opt (struct output_driver *d, struct string_map *options, const char *key,
201 const char *default_value)
203 return driver_option_get (d, options, key, default_value);
206 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
207 Currently, the input string must be of the form "#RRRRGGGGBBBB"
208 Future implementations might allow things like "yellow" and
209 "sky-blue-ultra-brown"
212 parse_color (struct output_driver *d, struct string_map *options,
213 const char *key, const char *default_value,
214 struct xr_color *color)
216 int red, green, blue;
217 char *string = parse_string (opt (d, options, key, default_value));
219 if (3 != sscanf (string, "#%04x%04x%04x", &red, &green, &blue))
221 /* If the parsed option string fails, then try the default value */
222 if ( 3 != sscanf (default_value, "#%04x%04x%04x", &red, &green, &blue))
224 /* ... and if that fails set everything to zero */
225 red = green = blue = 0;
231 /* Convert 16 bit ints to float */
232 color->red = red / (double) 0xFFFF;
233 color->green = green / (double) 0xFFFF;
234 color->blue = blue / (double) 0xFFFF;
237 static PangoFontDescription *
238 parse_font (const char *font, int default_size, bool bold, bool italic)
240 if (!c_strcasecmp (font, "Monospaced"))
243 PangoFontDescription *desc = pango_font_description_from_string (font);
247 /* If the font description didn't include an explicit font size, then set it
248 to DEFAULT_SIZE, which is in inch/72000 units. */
249 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
250 pango_font_description_set_size (desc,
251 (default_size / 1000.0) * PANGO_SCALE);
253 pango_font_description_set_weight (desc, (bold
255 : PANGO_WEIGHT_NORMAL));
256 pango_font_description_set_style (desc, (italic
258 : PANGO_STYLE_NORMAL));
263 static PangoFontDescription *
264 parse_font_option (struct output_driver *d, struct string_map *options,
265 const char *key, const char *default_value,
266 int default_size, bool bold, bool italic)
268 char *string = parse_string (opt (d, options, key, default_value));
269 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
272 msg (MW, _("`%s': bad font specification"), string);
274 /* Fall back to DEFAULT_VALUE, which had better be a valid font
276 desc = parse_font (default_value, default_size, bold, italic);
277 assert (desc != NULL);
285 apply_options (struct xr_driver *xr, struct string_map *o)
287 struct output_driver *d = &xr->driver;
289 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
290 int left_margin, right_margin;
291 int top_margin, bottom_margin;
292 int paper_width, paper_length;
294 int min_break[TABLE_N_AXES];
296 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
297 const double scale = XR_POINT / 1000.;
301 for (i = 0; i < XR_N_FONTS; i++)
303 struct xr_font *font = &xr->fonts[i];
305 if (font->desc != NULL)
306 pango_font_description_free (font->desc);
309 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
310 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
311 (d, o, "fixed-font", "monospace", font_size, false, false);
312 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
313 d, o, "prop-font", "sans serif", font_size, false, false);
314 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
315 d, o, "emph-font", "sans serif", font_size, false, true);
319 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
320 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
322 /* Get dimensions. */
323 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
324 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
325 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
326 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
327 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
329 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
330 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
332 /* Convert to inch/(XR_POINT * 72). */
333 xr->left_margin = left_margin * scale;
334 xr->right_margin = right_margin * scale;
335 xr->top_margin = top_margin * scale;
336 xr->bottom_margin = bottom_margin * scale;
337 xr->width = (paper_width - left_margin - right_margin) * scale;
338 xr->length = (paper_length - top_margin - bottom_margin) * scale;
339 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
340 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
343 static struct xr_driver *
344 xr_allocate (const char *name, int device_type, struct string_map *o)
346 struct xr_driver *xr = xzalloc (sizeof *xr);
347 struct output_driver *d = &xr->driver;
349 output_driver_init (d, &cairo_driver_class, name, device_type);
351 apply_options (xr, o);
357 pango_to_xr (int pango)
359 return (XR_POINT != PANGO_SCALE
360 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
367 return (XR_POINT != PANGO_SCALE
368 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
373 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
379 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
383 for (i = 0; i < XR_N_FONTS; i++)
385 struct xr_font *font = &xr->fonts[i];
386 int char_width, char_height;
388 font->layout = pango_cairo_create_layout (cairo);
389 pango_layout_set_font_description (font->layout, font->desc);
391 pango_layout_set_text (font->layout, "0", 1);
392 pango_layout_get_size (font->layout, &char_width, &char_height);
393 xr->char_width = MAX (xr->char_width, pango_to_xr (char_width));
394 xr->char_height = MAX (xr->char_height, pango_to_xr (char_height));
397 if (xr->params == NULL)
399 xr->params = xmalloc (sizeof *xr->params);
400 xr->params->draw_line = xr_draw_line;
401 xr->params->measure_cell_width = xr_measure_cell_width;
402 xr->params->measure_cell_height = xr_measure_cell_height;
403 xr->params->adjust_break = xr_adjust_break;
404 xr->params->draw_cell = xr_draw_cell;
405 xr->params->aux = xr;
406 xr->params->size[H] = xr->width;
407 xr->params->size[V] = xr->length;
408 xr->params->font_size[H] = xr->char_width;
409 xr->params->font_size[V] = xr->char_height;
411 int lw = XR_LINE_WIDTH;
412 int ls = XR_LINE_SPACE;
413 for (i = 0; i < TABLE_N_AXES; i++)
415 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
416 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
417 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
418 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
419 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
420 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
423 for (i = 0; i < TABLE_N_AXES; i++)
424 xr->params->min_break[i] = xr->min_break[i];
425 xr->params->supports_margins = true;
428 cairo_set_source_rgb (xr->cairo, xr->fg.red, xr->fg.green, xr->fg.blue);
433 static struct output_driver *
434 xr_create (const char *file_name, enum settings_output_devices device_type,
435 struct string_map *o, enum xr_output_type file_type)
437 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
438 struct xr_driver *xr;
439 cairo_surface_t *surface;
440 cairo_status_t status;
441 double width_pt, length_pt;
443 xr = xr_allocate (file_name, device_type, o);
445 width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
446 length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
447 if (file_type == XR_PDF)
448 surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
449 else if (file_type == XR_PS)
450 surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
451 else if (file_type == XR_SVG)
452 surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
456 status = cairo_surface_status (surface);
457 if (status != CAIRO_STATUS_SUCCESS)
459 msg (ME, _("error opening output file `%s': %s"),
460 file_name, cairo_status_to_string (status));
461 cairo_surface_destroy (surface);
465 xr->cairo = cairo_create (surface);
466 cairo_surface_destroy (surface);
468 if (!xr_set_cairo (xr, xr->cairo))
471 cairo_save (xr->cairo);
472 xr_driver_next_page (xr, xr->cairo);
474 if (xr->width / xr->char_width < MIN_WIDTH)
476 msg (ME, _("The defined page is not wide enough to hold at least %d "
477 "characters in the default font. In fact, there's only "
478 "room for %d characters."),
480 xr->width / xr->char_width);
484 if (xr->length / xr->char_height < MIN_LENGTH)
486 msg (ME, _("The defined page is not long enough to hold at least %d "
487 "lines in the default font. In fact, there's only "
488 "room for %d lines."),
490 xr->length / xr->char_height);
497 output_driver_destroy (&xr->driver);
501 static struct output_driver *
502 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
503 struct string_map *o)
505 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PDF);
510 static struct output_driver *
511 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
512 struct string_map *o)
514 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PS);
519 static struct output_driver *
520 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
521 struct string_map *o)
523 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_SVG);
529 xr_destroy (struct output_driver *driver)
531 struct xr_driver *xr = xr_driver_cast (driver);
534 xr_driver_destroy_fsm (xr);
536 if (xr->cairo != NULL)
538 cairo_status_t status;
540 cairo_surface_finish (cairo_get_target (xr->cairo));
541 status = cairo_status (xr->cairo);
542 if (status != CAIRO_STATUS_SUCCESS)
543 msg (ME, _("error drawing output for %s driver: %s"),
544 output_driver_get_name (driver),
545 cairo_status_to_string (status));
546 cairo_destroy (xr->cairo);
549 for (i = 0; i < XR_N_FONTS; i++)
551 struct xr_font *font = &xr->fonts[i];
553 if (font->desc != NULL)
554 pango_font_description_free (font->desc);
555 if (font->layout != NULL)
556 g_object_unref (font->layout);
564 xr_flush (struct output_driver *driver)
566 struct xr_driver *xr = xr_driver_cast (driver);
568 cairo_surface_flush (cairo_get_target (xr->cairo));
572 xr_submit (struct output_driver *driver, const struct output_item *output_item)
574 struct xr_driver *xr = xr_driver_cast (driver);
576 xr_driver_output_item (xr, output_item);
577 while (xr_driver_need_new_page (xr))
579 cairo_restore (xr->cairo);
580 cairo_show_page (xr->cairo);
581 cairo_save (xr->cairo);
582 xr_driver_next_page (xr, xr->cairo);
586 /* Functions for rendering a series of output items to a series of Cairo
587 contexts, with pagination.
589 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
590 its underlying implementation.
592 See the big comment in cairo.h for intended usage. */
594 /* Gives new page CAIRO to XR for output. */
596 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
599 cairo_set_source_rgb (cairo, xr->bg.red, xr->bg.green, xr->bg.blue);
600 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
602 cairo_restore (cairo);
604 cairo_translate (cairo,
605 xr_to_pt (xr->left_margin),
606 xr_to_pt (xr->top_margin));
611 xr_driver_run_fsm (xr);
614 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
615 rendering a previous output item, that is, only if xr_driver_need_new_page()
618 xr_driver_output_item (struct xr_driver *xr,
619 const struct output_item *output_item)
621 assert (xr->fsm == NULL);
622 xr->fsm = xr_render_output_item (xr, output_item);
623 xr_driver_run_fsm (xr);
626 /* Returns true if XR is in the middle of rendering an output item and needs a
627 new page to be appended using xr_driver_next_page() to make progress,
630 xr_driver_need_new_page (const struct xr_driver *xr)
632 return xr->fsm != NULL;
635 /* Returns true if the current page doesn't have any content yet. */
637 xr_driver_is_page_blank (const struct xr_driver *xr)
643 xr_driver_destroy_fsm (struct xr_driver *xr)
647 xr->fsm->destroy (xr->fsm);
653 xr_driver_run_fsm (struct xr_driver *xr)
655 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
656 xr_driver_destroy_fsm (xr);
660 xr_layout_cell (struct xr_driver *, const struct table_cell *,
661 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
662 int *width, int *height, int *brk);
665 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
666 const struct cell_color *color)
668 cairo_new_path (xr->cairo);
669 cairo_set_source_rgb (xr->cairo,
670 color->r / 255.0, color->g / 255.0, color->b / 255.0);
671 cairo_set_line_width (
673 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
674 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
676 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
677 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
678 cairo_stroke (xr->cairo);
682 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
684 cairo_new_path (xr->cairo);
685 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
686 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
687 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
688 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
689 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
690 cairo_close_path (xr->cairo);
691 cairo_stroke (xr->cairo);
695 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
697 cairo_new_path (xr->cairo);
698 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
699 cairo_rectangle (xr->cairo,
700 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
701 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
702 cairo_fill (xr->cairo);
705 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
706 shortening it to X0...X1 if SHORTEN is true.
707 Draws a horizontal line X1...X3 at Y if RIGHT says so,
708 shortening it to X2...X3 if SHORTEN is true. */
710 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
711 enum render_line_style left, enum render_line_style right,
712 const struct cell_color *left_color,
713 const struct cell_color *right_color,
716 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
717 && cell_color_equal (left_color, right_color))
718 dump_line (xr, x0, y, x3, y, left, left_color);
721 if (left != RENDER_LINE_NONE)
722 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
723 if (right != RENDER_LINE_NONE)
724 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
728 /* Draws a vertical line Y0...Y2 at X if TOP says so,
729 shortening it to Y0...Y1 if SHORTEN is true.
730 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
731 shortening it to Y2...Y3 if SHORTEN is true. */
733 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
734 enum render_line_style top, enum render_line_style bottom,
735 const struct cell_color *top_color,
736 const struct cell_color *bottom_color,
739 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
740 && cell_color_equal (top_color, bottom_color))
741 dump_line (xr, x, y0, x, y3, top, top_color);
744 if (top != RENDER_LINE_NONE)
745 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
746 if (bottom != RENDER_LINE_NONE)
747 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
752 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
753 enum render_line_style styles[TABLE_N_AXES][2],
754 struct cell_color colors[TABLE_N_AXES][2])
756 const int x0 = bb[H][0];
757 const int y0 = bb[V][0];
758 const int x3 = bb[H][1];
759 const int y3 = bb[V][1];
760 const int top = styles[H][0];
761 const int bottom = styles[H][1];
763 int start_side = render_direction_rtl();
764 int end_side = !start_side;
765 const int start_of_line = styles[V][start_side];
766 const int end_of_line = styles[V][end_side];
767 const struct cell_color *top_color = &colors[H][0];
768 const struct cell_color *bottom_color = &colors[H][1];
769 const struct cell_color *start_color = &colors[V][start_side];
770 const struct cell_color *end_color = &colors[V][end_side];
772 /* The algorithm here is somewhat subtle, to allow it to handle
773 all the kinds of intersections that we need.
775 Three additional ordinates are assigned along the x axis. The
776 first is xc, midway between x0 and x3. The others are x1 and
777 x2; for a single vertical line these are equal to xc, and for
778 a double vertical line they are the ordinates of the left and
779 right half of the double line.
781 yc, y1, and y2 are assigned similarly along the y axis.
783 The following diagram shows the coordinate system and output
784 for double top and bottom lines, single left line, and no
788 y0 ________________________
794 y1 = y2 = yc |######### # |
799 y3 |________#_____#_______|
801 struct xr_driver *xr = xr_;
803 /* Offset from center of each line in a pair of double lines. */
804 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
806 /* Are the lines along each axis single or double?
807 (It doesn't make sense to have different kinds of line on the
808 same axis, so we don't try to gracefully handle that case.) */
809 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
810 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
812 /* When horizontal lines are doubled,
813 the left-side line along y1 normally runs from x0 to x2,
814 and the right-side line along y1 from x3 to x1.
815 If the top-side line is also doubled, we shorten the y1 lines,
816 so that the left-side line runs only to x1,
817 and the right-side line only to x2.
818 Otherwise, the horizontal line at y = y1 below would cut off
819 the intersection, which looks ugly:
821 y0 ________________________
826 y1 |######### ########|
829 y2 |######################|
832 y3 |______________________|
833 It is more of a judgment call when the horizontal line is
834 single. We actually choose to cut off the line anyhow, as
835 shown in the first diagram above.
837 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
838 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
839 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
840 int horz_line_ofs = double_vert ? double_line_ofs : 0;
841 int xc = (x0 + x3) / 2;
842 int x1 = xc - horz_line_ofs;
843 int x2 = xc + horz_line_ofs;
845 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
846 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
847 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
848 int vert_line_ofs = double_horz ? double_line_ofs : 0;
849 int yc = (y0 + y3) / 2;
850 int y1 = yc - vert_line_ofs;
851 int y2 = yc + vert_line_ofs;
854 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
855 start_color, end_color, shorten_yc_line);
858 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
859 start_color, end_color, shorten_y1_lines);
860 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
861 start_color, end_color, shorten_y2_lines);
865 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
869 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
871 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
877 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
878 int *min_width, int *max_width)
880 struct xr_driver *xr = xr_;
881 int bb[TABLE_N_AXES][2];
882 int clip[TABLE_N_AXES][2];
889 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
890 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
893 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
896 *min_width += px_to_xr (cell->style->margin[H][0]
897 + cell->style->margin[H][1]);
899 *max_width += px_to_xr (cell->style->margin[H][0]
900 + cell->style->margin[H][1]);
904 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
906 struct xr_driver *xr = xr_;
907 int bb[TABLE_N_AXES][2];
908 int clip[TABLE_N_AXES][2];
912 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
913 + cell->style->margin[H][1]);
916 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
917 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
918 h += px_to_xr (cell->style->margin[V][0] + cell->style->margin[V][1]);
922 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
925 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
926 int bb[TABLE_N_AXES][2],
927 int spill[TABLE_N_AXES][2],
928 int clip[TABLE_N_AXES][2])
930 struct xr_driver *xr = xr_;
933 cairo_save (xr->cairo);
934 int bg_clip[TABLE_N_AXES][2];
935 for (int axis = 0; axis < TABLE_N_AXES; axis++)
937 bg_clip[axis][0] = clip[axis][0];
938 if (bb[axis][0] == clip[axis][0])
939 bg_clip[axis][0] -= spill[axis][0];
941 bg_clip[axis][1] = clip[axis][1];
942 if (bb[axis][1] == clip[axis][1])
943 bg_clip[axis][1] += spill[axis][1];
945 xr_clip (xr, bg_clip);
946 cairo_set_source_rgb (xr->cairo,
947 cell->style->bg[color_idx].r / 255.,
948 cell->style->bg[color_idx].g / 255.,
949 cell->style->bg[color_idx].b / 255.);
951 bb[H][0] - spill[H][0],
952 bb[V][0] - spill[V][0],
953 bb[H][1] + spill[H][1],
954 bb[V][1] + spill[V][1]);
955 cairo_restore (xr->cairo);
957 cairo_save (xr->cairo);
958 cairo_set_source_rgb (xr->cairo,
959 cell->style->fg[color_idx].r / 255.,
960 cell->style->fg[color_idx].g / 255.,
961 cell->style->fg[color_idx].b / 255.);
963 for (int axis = 0; axis < TABLE_N_AXES; axis++)
965 bb[axis][0] += px_to_xr (cell->style->margin[axis][0]);
966 bb[axis][1] -= px_to_xr (cell->style->margin[axis][1]);
968 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
969 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
970 cairo_restore (xr->cairo);
974 xr_adjust_break (void *xr_, const struct table_cell *cell,
975 int width, int height)
977 struct xr_driver *xr = xr_;
978 int bb[TABLE_N_AXES][2];
979 int clip[TABLE_N_AXES][2];
982 if (xr_measure_cell_height (xr_, cell, width) < height)
986 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
987 + cell->style->margin[H][1]);
991 bb[V][1] = height - px_to_xr (cell->style->margin[V][0]
992 + cell->style->margin[V][1]);
993 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
994 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
999 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1001 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1003 double x0 = xr_to_pt (clip[H][0] + xr->x);
1004 double y0 = xr_to_pt (clip[V][0] + xr->y);
1005 double x1 = xr_to_pt (clip[H][1] + xr->x);
1006 double y1 = xr_to_pt (clip[V][1] + xr->y);
1008 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1009 cairo_clip (xr->cairo);
1014 add_attr_with_start (PangoAttrList *list, PangoAttribute *attr, guint start_index)
1016 attr->start_index = start_index;
1017 pango_attr_list_insert (list, attr);
1021 xr_layout_cell_text (struct xr_driver *xr,
1022 const struct cell_contents *contents,
1023 const struct cell_style *style,
1024 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1025 int *widthp, int *brk)
1027 unsigned int options = contents->options;
1030 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1031 : options & TAB_EMPH ? &xr->fonts[XR_FONT_EMPHASIS]
1032 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1033 struct xr_font local_font;
1036 PangoFontDescription *desc = parse_font (
1038 style->font_size ? style->font_size * 1000 * 72 / 128 : 10000,
1039 style->bold, style->italic);
1042 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1043 pango_layout_set_font_description (layout, desc);
1045 local_font.desc = desc;
1046 local_font.layout = layout;
1051 int footnote_adjustment;
1052 if (contents->n_footnotes == 0)
1053 footnote_adjustment = 0;
1054 else if (contents->n_footnotes == 1 && (options & TAB_HALIGN) == TAB_RIGHT)
1056 PangoAttrList *attrs;
1058 const char *marker = contents->footnotes[0]->marker;
1059 pango_layout_set_text (font->layout, marker, strlen (marker));
1061 attrs = pango_attr_list_new ();
1062 pango_attr_list_insert (attrs, pango_attr_rise_new (7000));
1063 pango_layout_set_attributes (font->layout, attrs);
1064 pango_attr_list_unref (attrs);
1066 pango_layout_get_size (font->layout, &w, &h);
1067 footnote_adjustment = MIN (w, px_to_xr (style->margin[H][1]));
1070 footnote_adjustment = px_to_xr (style->margin[H][1]);
1072 struct string tmp = DS_EMPTY_INITIALIZER;
1073 const char *text = contents->text;
1075 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1076 Pango's implementation of it): it will break after a period or a comma
1077 that precedes a digit, e.g. in ".000" it will break after the period.
1078 This code looks for such a situation and inserts a U+2060 WORD JOINER
1079 to prevent the break.
1081 This isn't necessary when the decimal point is between two digits
1082 (e.g. "0.000" won't be broken) or when the display width is not limited so
1083 that word wrapping won't happen.
1085 It isn't necessary to look for more than one period or comma, as would
1086 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1087 are present then there will always be a digit on both sides of every
1088 period and comma. */
1089 if (bb[H][1] != INT_MAX)
1091 const char *decimal = text + strcspn (text, ".,");
1093 && c_isdigit (decimal[1])
1094 && (decimal == text || !c_isdigit (decimal[-1])))
1096 ds_extend (&tmp, strlen (text) + 16);
1097 ds_put_substring (&tmp, ss_buffer (text, decimal - text + 1));
1098 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1099 ds_put_cstr (&tmp, decimal + 1);
1103 if (footnote_adjustment)
1105 bb[H][1] += footnote_adjustment;
1107 if (ds_is_empty (&tmp))
1109 ds_extend (&tmp, strlen (text) + 16);
1110 ds_put_cstr (&tmp, text);
1112 size_t initial_length = ds_length (&tmp);
1114 cell_contents_format_footnote_markers (contents, &tmp);
1115 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1117 PangoAttrList *attrs = pango_attr_list_new ();
1118 if (style->underline)
1119 pango_attr_list_insert (attrs, pango_attr_underline_new (
1120 PANGO_UNDERLINE_SINGLE));
1121 add_attr_with_start (attrs, pango_attr_rise_new (7000), initial_length);
1122 add_attr_with_start (
1123 attrs, pango_attr_font_desc_new (font->desc), initial_length);
1124 pango_layout_set_attributes (font->layout, attrs);
1125 pango_attr_list_unref (attrs);
1129 const char *content = ds_is_empty (&tmp) ? text : ds_cstr (&tmp);
1130 pango_layout_set_text (font->layout, content, -1);
1132 if (style->underline)
1134 PangoAttrList *attrs = pango_attr_list_new ();
1135 pango_attr_list_insert (attrs, pango_attr_underline_new (
1136 PANGO_UNDERLINE_SINGLE));
1137 pango_layout_set_attributes (font->layout, attrs);
1138 pango_attr_list_unref (attrs);
1143 pango_layout_set_alignment (
1145 ((options & TAB_HALIGN) == TAB_RIGHT ? PANGO_ALIGN_RIGHT
1146 : (options & TAB_HALIGN) == TAB_LEFT ? PANGO_ALIGN_LEFT
1147 : PANGO_ALIGN_CENTER));
1148 pango_layout_set_width (
1150 bb[H][1] == INT_MAX ? -1 : xr_to_pango (bb[H][1] - bb[H][0]));
1151 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1153 if (clip[H][0] != clip[H][1])
1155 cairo_save (xr->cairo);
1157 cairo_translate (xr->cairo,
1158 xr_to_pt (bb[H][0] + xr->x),
1159 xr_to_pt (bb[V][0] + xr->y));
1160 pango_cairo_show_layout (xr->cairo, font->layout);
1162 /* If enabled, this draws a blue rectangle around the extents of each
1163 line of text, which can be rather useful for debugging layout
1167 PangoLayoutIter *iter;
1168 iter = pango_layout_get_iter (font->layout);
1171 PangoRectangle extents;
1173 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1174 cairo_save (xr->cairo);
1175 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1177 pango_to_xr (extents.x) - xr->x,
1178 pango_to_xr (extents.y) - xr->y,
1179 pango_to_xr (extents.x + extents.width) - xr->x,
1180 pango_to_xr (extents.y + extents.height) - xr->y);
1181 cairo_restore (xr->cairo);
1183 while (pango_layout_iter_next_line (iter));
1184 pango_layout_iter_free (iter);
1187 cairo_restore (xr->cairo);
1190 pango_layout_get_size (font->layout, &w, &h);
1191 w = pango_to_xr (w);
1192 h = pango_to_xr (h);
1195 if (bb[V][0] + h >= bb[V][1])
1197 PangoLayoutIter *iter;
1198 int best UNUSED = 0;
1200 /* Choose a breakpoint between lines instead of in the middle of one. */
1201 iter = pango_layout_get_iter (font->layout);
1204 PangoRectangle extents;
1208 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1209 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1210 extents.x = pango_to_xr (extents.x);
1211 extents.y = pango_to_xr (y0);
1212 extents.width = pango_to_xr (extents.width);
1213 extents.height = pango_to_xr (y1 - y0);
1214 bottom = bb[V][0] + extents.y + extents.height;
1215 if (bottom < bb[V][1])
1217 if (brk && clip[H][0] != clip[H][1])
1225 while (pango_layout_iter_next_line (iter));
1226 pango_layout_iter_free (iter);
1228 /* If enabled, draws a green line across the chosen breakpoint, which can
1229 be useful for debugging issues with breaking. */
1232 if (best && !xr->nest)
1233 dump_line (xr, -xr->left_margin, best,
1234 xr->width + xr->right_margin, best,
1235 RENDER_LINE_SINGLE, &CELL_COLOR (0, 255, 0));
1239 pango_layout_set_attributes (font->layout, NULL);
1241 if (font == &local_font)
1243 g_object_unref (G_OBJECT (font->layout));
1244 pango_font_description_free (font->desc);
1247 return bb[V][0] + h;
1251 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1252 int bb_[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1253 int *width, int *height, int *brk)
1255 int bb[TABLE_N_AXES][2];
1263 memcpy (bb, bb_, sizeof bb);
1265 /* If enabled, draws a blue rectangle around the cell extents, which can be
1266 useful for debugging layout. */
1269 if (clip[H][0] != clip[H][1])
1271 int offset = (xr->nest) * XR_POINT;
1273 cairo_save (xr->cairo);
1274 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1276 bb[H][0] + offset, bb[V][0] + offset,
1277 bb[H][1] - offset, bb[V][1] - offset);
1278 cairo_restore (xr->cairo);
1282 for (i = 0; i < cell->n_contents && bb[V][0] < bb[V][1]; i++)
1284 const struct cell_contents *contents = &cell->contents[i];
1290 bb[V][0] += xr->char_height / 2;
1291 if (bb[V][0] >= bb[V][1])
1297 bb[V][0] = xr_layout_cell_text (xr, contents, cell->style, bb, clip,
1300 *height = bb[V][0] - bb_[V][0];
1303 struct output_driver_factory pdf_driver_factory =
1304 { "pdf", "pspp.pdf", xr_pdf_create };
1305 struct output_driver_factory ps_driver_factory =
1306 { "ps", "pspp.ps", xr_ps_create };
1307 struct output_driver_factory svg_driver_factory =
1308 { "svg", "pspp.svg", xr_svg_create };
1310 static const struct output_driver_class cairo_driver_class =
1318 /* GUI rendering helpers. */
1322 struct output_item *item;
1325 struct render_pager *p;
1326 struct xr_driver *xr;
1329 #define CHART_WIDTH 500
1330 #define CHART_HEIGHT 375
1335 xr_driver_create (cairo_t *cairo, struct string_map *options)
1337 struct xr_driver *xr = xr_allocate ("cairo", 0, options);
1338 if (!xr_set_cairo (xr, cairo))
1340 output_driver_destroy (&xr->driver);
1346 /* Destroy XR, which should have been created with xr_driver_create(). Any
1347 cairo_t added to XR is not destroyed, because it is owned by the client. */
1349 xr_driver_destroy (struct xr_driver *xr)
1354 output_driver_destroy (&xr->driver);
1358 static struct xr_rendering *
1359 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1361 struct table_item *table_item;
1362 struct xr_rendering *r;
1364 table_item = table_item_create (table_from_string (TAB_LEFT, text),
1366 r = xr_rendering_create (xr, &table_item->output_item, cr);
1367 table_item_unref (table_item);
1373 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1375 if (is_table_item (xr->item))
1376 apply_options (xr->xr, o);
1379 struct xr_rendering *
1380 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1383 struct xr_rendering *r = NULL;
1385 if (is_text_item (item))
1386 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1388 else if (is_message_item (item))
1390 const struct message_item *message_item = to_message_item (item);
1391 char *s = msg_to_string (message_item_get_msg (message_item));
1392 r = xr_rendering_create_text (xr, s, cr);
1395 else if (is_table_item (item))
1397 r = xzalloc (sizeof *r);
1398 r->item = output_item_ref (item);
1400 xr_set_cairo (xr, cr);
1401 r->p = render_pager_create (xr->params, to_table_item (item));
1403 else if (is_chart_item (item))
1405 r = xzalloc (sizeof *r);
1406 r->item = output_item_ref (item);
1413 xr_rendering_destroy (struct xr_rendering *r)
1417 output_item_unref (r->item);
1418 render_pager_destroy (r->p);
1424 xr_rendering_measure (struct xr_rendering *r, int *w, int *h)
1426 if (is_table_item (r->item))
1428 *w = render_pager_get_size (r->p, H) / XR_POINT;
1429 *h = render_pager_get_size (r->p, V) / XR_POINT;
1438 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1439 double x, double y, double width, double height);
1443 xr_rendering_draw_all (struct xr_rendering *r, cairo_t *cr)
1445 if (is_table_item (r->item))
1447 struct xr_driver *xr = r->xr;
1449 xr_set_cairo (xr, cr);
1451 render_pager_draw (r->p);
1455 xr_draw_chart (to_chart_item (r->item), cr,
1456 0, 0, CHART_WIDTH, CHART_HEIGHT);
1460 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1461 double x, double y, double width, double height)
1463 struct xrchart_geometry geom;
1466 cairo_translate (cr, x, y + height);
1467 cairo_scale (cr, 1.0, -1.0);
1468 xrchart_geometry_init (cr, &geom, width, height);
1469 if (is_boxplot (chart_item))
1470 xrchart_draw_boxplot (chart_item, cr, &geom);
1471 else if (is_histogram_chart (chart_item))
1472 xrchart_draw_histogram (chart_item, cr, &geom);
1473 else if (is_np_plot_chart (chart_item))
1474 xrchart_draw_np_plot (chart_item, cr, &geom);
1475 else if (is_piechart (chart_item))
1476 xrchart_draw_piechart (chart_item, cr, &geom);
1477 else if (is_barchart (chart_item))
1478 xrchart_draw_barchart (chart_item, cr, &geom);
1479 else if (is_roc_chart (chart_item))
1480 xrchart_draw_roc (chart_item, cr, &geom);
1481 else if (is_scree (chart_item))
1482 xrchart_draw_scree (chart_item, cr, &geom);
1483 else if (is_spreadlevel_plot_chart (chart_item))
1484 xrchart_draw_spreadlevel (chart_item, cr, &geom);
1485 else if (is_scatterplot_chart (chart_item))
1486 xrchart_draw_scatterplot (chart_item, cr, &geom);
1489 xrchart_geometry_free (cr, &geom);
1495 xr_draw_png_chart (const struct chart_item *item,
1496 const char *file_name_template, int number,
1497 const struct xr_color *fg,
1498 const struct xr_color *bg
1501 const int width = 640;
1502 const int length = 480;
1504 cairo_surface_t *surface;
1505 cairo_status_t status;
1506 const char *number_pos;
1510 number_pos = strchr (file_name_template, '#');
1511 if (number_pos != NULL)
1512 file_name = xasprintf ("%.*s%d%s", (int) (number_pos - file_name_template),
1513 file_name_template, number, number_pos + 1);
1515 file_name = xstrdup (file_name_template);
1517 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
1518 cr = cairo_create (surface);
1520 cairo_set_source_rgb (cr, bg->red, bg->green, bg->blue);
1523 cairo_set_source_rgb (cr, fg->red, fg->green, fg->blue);
1525 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
1527 status = cairo_surface_write_to_png (surface, file_name);
1528 if (status != CAIRO_STATUS_SUCCESS)
1529 msg (ME, _("error writing output file `%s': %s"),
1530 file_name, cairo_status_to_string (status));
1533 cairo_surface_destroy (surface);
1538 struct xr_table_state
1540 struct xr_render_fsm fsm;
1541 struct table_item *table_item;
1542 struct render_pager *p;
1546 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1548 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1550 while (render_pager_has_next (ts->p))
1554 used = render_pager_draw_next (ts->p, xr->length - xr->y);
1567 xr_table_destroy (struct xr_render_fsm *fsm)
1569 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1571 table_item_unref (ts->table_item);
1572 render_pager_destroy (ts->p);
1576 static struct xr_render_fsm *
1577 xr_render_table (struct xr_driver *xr, const struct table_item *table_item)
1579 struct xr_table_state *ts;
1581 ts = xmalloc (sizeof *ts);
1582 ts->fsm.render = xr_table_render;
1583 ts->fsm.destroy = xr_table_destroy;
1584 ts->table_item = table_item_ref (table_item);
1587 xr->y += xr->char_height;
1589 ts->p = render_pager_create (xr->params, table_item);
1594 struct xr_chart_state
1596 struct xr_render_fsm fsm;
1597 struct chart_item *chart_item;
1601 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1603 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1605 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
1607 if (xr->y > xr->length - chart_height)
1610 if (xr->cairo != NULL)
1612 xr_draw_chart (cs->chart_item, xr->cairo,
1615 xr_to_pt (xr->width),
1616 xr_to_pt (chart_height));
1618 xr->y += chart_height;
1624 xr_chart_destroy (struct xr_render_fsm *fsm)
1626 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1628 chart_item_unref (cs->chart_item);
1632 static struct xr_render_fsm *
1633 xr_render_chart (const struct chart_item *chart_item)
1635 struct xr_chart_state *cs;
1637 cs = xmalloc (sizeof *cs);
1638 cs->fsm.render = xr_chart_render;
1639 cs->fsm.destroy = xr_chart_destroy;
1640 cs->chart_item = chart_item_ref (chart_item);
1646 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
1652 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
1654 /* Nothing to do. */
1657 static struct xr_render_fsm *
1658 xr_render_eject (void)
1660 static struct xr_render_fsm eject_renderer =
1666 return &eject_renderer;
1669 static struct xr_render_fsm *
1670 xr_create_text_renderer (struct xr_driver *xr, const struct text_item *item)
1672 struct tab_table *tab = tab_create (1, 1);
1674 struct cell_style *style = pool_alloc (tab->container, sizeof *style);
1675 *style = (struct cell_style) CELL_STYLE_INITIALIZER;
1677 style->font = pool_strdup (tab->container, item->font);
1678 style->font_size = item->font_size;
1679 style->bold = item->bold;
1680 style->italic = item->italic;
1681 style->underline = item->underline;
1682 tab->styles[0] = style;
1684 tab_text (tab, 0, 0, TAB_LEFT, text_item_get_text (item));
1685 struct table_item *table_item = table_item_create (&tab->table, NULL, NULL);
1686 struct xr_render_fsm *fsm = xr_render_table (xr, table_item);
1687 table_item_unref (table_item);
1692 static struct xr_render_fsm *
1693 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
1695 enum text_item_type type = text_item_get_type (text_item);
1699 case TEXT_ITEM_PAGE_TITLE:
1702 case TEXT_ITEM_BLANK_LINE:
1704 xr->y += xr->char_height;
1707 case TEXT_ITEM_EJECT_PAGE:
1709 return xr_render_eject ();
1713 return xr_create_text_renderer (xr, text_item);
1719 static struct xr_render_fsm *
1720 xr_render_message (struct xr_driver *xr,
1721 const struct message_item *message_item)
1723 char *s = msg_to_string (message_item_get_msg (message_item));
1724 struct text_item *item = text_item_create (TEXT_ITEM_PARAGRAPH, s);
1726 struct xr_render_fsm *fsm = xr_create_text_renderer (xr, item);
1727 text_item_unref (item);
1732 static struct xr_render_fsm *
1733 xr_render_output_item (struct xr_driver *xr,
1734 const struct output_item *output_item)
1736 if (is_table_item (output_item))
1737 return xr_render_table (xr, to_table_item (output_item));
1738 else if (is_chart_item (output_item))
1739 return xr_render_chart (to_chart_item (output_item));
1740 else if (is_text_item (output_item))
1741 return xr_render_text (xr, to_text_item (output_item));
1742 else if (is_message_item (output_item))
1743 return xr_render_message (xr, to_message_item (output_item));