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-fsm.h"
22 #include <pango/pango-layout.h>
23 #include <pango/pango.h>
24 #include <pango/pangocairo.h>
26 #include "libpspp/assertion.h"
27 #include "libpspp/str.h"
28 #include "output/cairo-chart.h"
29 #include "output/chart-item-provider.h"
30 #include "output/chart-item.h"
31 #include "output/charts/barchart.h"
32 #include "output/charts/boxplot.h"
33 #include "output/charts/np-plot.h"
34 #include "output/charts/piechart.h"
35 #include "output/charts/plot-hist.h"
36 #include "output/charts/roc-chart.h"
37 #include "output/charts/scatterplot.h"
38 #include "output/charts/scree.h"
39 #include "output/charts/spreadlevel-plot.h"
40 #include "output/group-item.h"
41 #include "output/image-item.h"
42 #include "output/message-item.h"
43 #include "output/page-eject-item.h"
44 #include "output/page-setup-item.h"
45 #include "output/pivot-output.h"
46 #include "output/pivot-table.h"
47 #include "output/render.h"
48 #include "output/table-item.h"
49 #include "output/text-item.h"
51 #include "gl/c-ctype.h"
52 #include "gl/c-strcase.h"
53 #include "gl/xalloc.h"
55 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
60 xr_fsm_style_ref (const struct xr_fsm_style *style_)
62 assert (style_->ref_cnt > 0);
64 struct xr_fsm_style *style = CONST_CAST (struct xr_fsm_style *, style_);
70 xr_fsm_style_unshare (struct xr_fsm_style *old)
72 assert (old->ref_cnt > 0);
73 if (old->ref_cnt == 1)
76 xr_fsm_style_unref (old);
78 struct xr_fsm_style *new = xmemdup (old, sizeof *old);
81 new->font = pango_font_description_copy (old->font);
87 xr_fsm_style_unref (struct xr_fsm_style *style)
91 assert (style->ref_cnt > 0);
92 if (!--style->ref_cnt)
94 pango_font_description_free (style->font);
101 xr_fsm_style_equals (const struct xr_fsm_style *a,
102 const struct xr_fsm_style *b)
104 if (a->size[H] != b->size[H]
105 || a->size[V] != b->size[V]
106 || a->min_break[H] != b->min_break[H]
107 || a->min_break[V] != b->min_break[V]
108 || !pango_font_description_equal (a->font, b->font)
109 || a->use_system_colors != b->use_system_colors
110 || a->object_spacing != b->object_spacing
111 || a->font_resolution != b->font_resolution)
117 /* Renders a single output_item to an output device in one of two ways:
119 - 'print == true': Broken across multiple pages if necessary.
121 - 'print == false': In a single region that the user may scroll around if
124 Normally 'output_item' corresponds to a single rendering. There is a
125 special case when 'print == true' and 'output_item' is a table_item with
126 multiple layers and 'item->pt->table_look->print_all_layers == true'. In
127 that case, each layer is rendered separately from the FSM's internal point
128 of view; from the client's point of view, it is all one operation.
132 struct xr_fsm_style *style;
133 struct output_item *item;
136 /* Print mode only. */
139 /* Table items only. */
140 size_t *layer_indexes;
141 struct render_params rp;
142 struct render_pager *p;
143 cairo_t *cairo; /* XXX should this be here?! */
146 /* The unit used for internal measurements is inch/(72 * XR_POINT).
147 (Thus, XR_POINT units represent one point.) */
148 #define XR_POINT PANGO_SCALE
150 /* Conversions to and from points. */
154 return x / (double) XR_POINT;
157 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
161 return x * (PANGO_SCALE * 72 / 96);
165 pango_to_xr (int pango)
167 return (XR_POINT != PANGO_SCALE
168 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
175 return (XR_POINT != PANGO_SCALE
176 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
180 /* Dimensions for drawing lines in tables. */
181 #define XR_LINE_WIDTH (XR_POINT / 2) /* Width of an ordinary line. */
182 #define XR_LINE_SPACE XR_POINT /* Space between double lines. */
185 xr_layout_cell (struct xr_fsm *, const struct table_cell *,
186 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
187 int *width, int *height, int *brk);
190 xr_set_source_rgba (cairo_t *cairo, const struct cell_color *color)
192 cairo_set_source_rgba (cairo,
193 color->r / 255., color->g / 255., color->b / 255.,
194 color->alpha / 255.);
198 xr_draw_line (struct xr_fsm *xr, int x0, int y0, int x1, int y1, int style,
199 const struct cell_color *color)
201 cairo_new_path (xr->cairo);
202 cairo_set_line_width (
204 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
205 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
207 cairo_move_to (xr->cairo, xr_to_pt (x0), xr_to_pt (y0));
208 cairo_line_to (xr->cairo, xr_to_pt (x1), xr_to_pt (y1));
210 if (!xr->style->use_system_colors)
211 xr_set_source_rgba (xr->cairo, color);
212 if (style == RENDER_LINE_DASHED)
213 cairo_set_dash (xr->cairo, (double[]) { 2 }, 1, 0);
214 cairo_stroke (xr->cairo);
215 if (style == RENDER_LINE_DASHED)
216 cairo_set_dash (xr->cairo, NULL, 0, 0);
220 xr_draw_rectangle (struct xr_fsm *xr, int x0, int y0, int x1, int y1)
222 cairo_new_path (xr->cairo);
223 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
224 cairo_close_path (xr->cairo);
225 cairo_stroke (xr->cairo);
226 cairo_move_to (xr->cairo, xr_to_pt (x0), xr_to_pt (y0));
227 cairo_line_to (xr->cairo, xr_to_pt (x1), xr_to_pt (y0));
228 cairo_line_to (xr->cairo, xr_to_pt (x1), xr_to_pt (y1));
229 cairo_line_to (xr->cairo, xr_to_pt (x0), xr_to_pt (y1));
233 fill_rectangle (struct xr_fsm *xr, int x0, int y0, int x1, int y1)
235 cairo_new_path (xr->cairo);
236 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
237 cairo_rectangle (xr->cairo,
238 xr_to_pt (x0), xr_to_pt (y0),
239 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
240 cairo_fill (xr->cairo);
243 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
244 shortening it to X0...X1 if SHORTEN is true.
245 Draws a horizontal line X1...X3 at Y if RIGHT says so,
246 shortening it to X2...X3 if SHORTEN is true. */
248 xr_draw_horz_line (struct xr_fsm *xr, int x0, int x1, int x2, int x3, int y,
249 enum render_line_style left, enum render_line_style right,
250 const struct cell_color *left_color,
251 const struct cell_color *right_color,
254 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
255 && cell_color_equal (left_color, right_color))
256 xr_draw_line (xr, x0, y, x3, y, left, left_color);
259 if (left != RENDER_LINE_NONE)
260 xr_draw_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
261 if (right != RENDER_LINE_NONE)
262 xr_draw_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
266 /* Draws a vertical line Y0...Y2 at X if TOP says so,
267 shortening it to Y0...Y1 if SHORTEN is true.
268 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
269 shortening it to Y2...Y3 if SHORTEN is true. */
271 xr_draw_vert_line (struct xr_fsm *xr, int y0, int y1, int y2, int y3, int x,
272 enum render_line_style top, enum render_line_style bottom,
273 const struct cell_color *top_color,
274 const struct cell_color *bottom_color,
277 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
278 && cell_color_equal (top_color, bottom_color))
279 xr_draw_line (xr, x, y0, x, y3, top, top_color);
282 if (top != RENDER_LINE_NONE)
283 xr_draw_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
284 if (bottom != RENDER_LINE_NONE)
285 xr_draw_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
290 xrr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
291 enum render_line_style styles[TABLE_N_AXES][2],
292 struct cell_color colors[TABLE_N_AXES][2])
294 const int x0 = bb[H][0];
295 const int y0 = bb[V][0];
296 const int x3 = bb[H][1];
297 const int y3 = bb[V][1];
298 const int top = styles[H][0];
299 const int bottom = styles[H][1];
301 int start_side = render_direction_rtl();
302 int end_side = !start_side;
303 const int start_of_line = styles[V][start_side];
304 const int end_of_line = styles[V][end_side];
305 const struct cell_color *top_color = &colors[H][0];
306 const struct cell_color *bottom_color = &colors[H][1];
307 const struct cell_color *start_color = &colors[V][start_side];
308 const struct cell_color *end_color = &colors[V][end_side];
310 /* The algorithm here is somewhat subtle, to allow it to handle
311 all the kinds of intersections that we need.
313 Three additional ordinates are assigned along the x axis. The
314 first is xc, midway between x0 and x3. The others are x1 and
315 x2; for a single vertical line these are equal to xc, and for
316 a double vertical line they are the ordinates of the left and
317 right half of the double line.
319 yc, y1, and y2 are assigned similarly along the y axis.
321 The following diagram shows the coordinate system and output
322 for double top and bottom lines, single left line, and no
326 y0 ________________________
332 y1 = y2 = yc |######### # |
337 y3 |________#_____#_______|
339 struct xr_fsm *xr = xr_;
341 /* Offset from center of each line in a pair of double lines. */
342 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
344 /* Are the lines along each axis single or double?
345 (It doesn't make sense to have different kinds of line on the
346 same axis, so we don't try to gracefully handle that case.) */
347 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
348 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
350 /* When horizontal lines are doubled,
351 the left-side line along y1 normally runs from x0 to x2,
352 and the right-side line along y1 from x3 to x1.
353 If the top-side line is also doubled, we shorten the y1 lines,
354 so that the left-side line runs only to x1,
355 and the right-side line only to x2.
356 Otherwise, the horizontal line at y = y1 below would cut off
357 the intersection, which looks ugly:
359 y0 ________________________
364 y1 |######### ########|
367 y2 |######################|
370 y3 |______________________|
371 It is more of a judgment call when the horizontal line is
372 single. We actually choose to cut off the line anyhow, as
373 shown in the first diagram above.
375 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
376 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
377 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
378 int horz_line_ofs = double_vert ? double_line_ofs : 0;
379 int xc = (x0 + x3) / 2;
380 int x1 = xc - horz_line_ofs;
381 int x2 = xc + horz_line_ofs;
383 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
384 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
385 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
386 int vert_line_ofs = double_horz ? double_line_ofs : 0;
387 int yc = (y0 + y3) / 2;
388 int y1 = yc - vert_line_ofs;
389 int y2 = yc + vert_line_ofs;
392 xr_draw_horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
393 start_color, end_color, shorten_yc_line);
396 xr_draw_horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
397 start_color, end_color, shorten_y1_lines);
398 xr_draw_horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
399 start_color, end_color, shorten_y2_lines);
403 xr_draw_vert_line (xr, y0, y1, y2, y3, xc, top, bottom,
404 top_color, bottom_color, shorten_xc_line);
407 xr_draw_vert_line (xr, y0, y1, y2, y3, x1, top, bottom,
408 top_color, bottom_color, shorten_x1_lines);
409 xr_draw_vert_line (xr, y0, y1, y2, y3, x2, top, bottom,
410 top_color, bottom_color, shorten_x2_lines);
415 xrr_measure_cell_width (void *xr_, const struct table_cell *cell,
416 int *min_width, int *max_width)
418 struct xr_fsm *xr = xr_;
419 int bb[TABLE_N_AXES][2];
420 int clip[TABLE_N_AXES][2];
427 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
428 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
431 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
433 const int (*margin)[2] = cell->cell_style->margin;
435 *min_width += px_to_xr (margin[H][0] + margin[H][1]);
437 *max_width += px_to_xr (margin[H][0] + margin[H][1]);
441 xrr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
443 struct xr_fsm *xr = xr_;
445 const int (*margin)[2] = cell->cell_style->margin;
447 int bb[TABLE_N_AXES][2] = {
449 [H][1] = width - px_to_xr (margin[H][0] + margin[H][1]),
454 int clip[TABLE_N_AXES][2] = { { 0, 0 }, { 0, 0 } };
457 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
458 h += px_to_xr (margin[V][0] + margin[V][1]);
462 static void xr_clip (struct xr_fsm *, int clip[TABLE_N_AXES][2]);
465 xrr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
466 int bb[TABLE_N_AXES][2], int valign_offset,
467 int spill[TABLE_N_AXES][2],
468 int clip[TABLE_N_AXES][2])
470 struct xr_fsm *xr = xr_;
473 const struct cell_color *bg = &cell->font_style->bg[color_idx];
474 if ((bg->r != 255 || bg->g != 255 || bg->b != 255) && bg->alpha)
476 cairo_save (xr->cairo);
477 int bg_clip[TABLE_N_AXES][2];
478 for (int axis = 0; axis < TABLE_N_AXES; axis++)
480 bg_clip[axis][0] = clip[axis][0];
481 if (bb[axis][0] == clip[axis][0])
482 bg_clip[axis][0] -= spill[axis][0];
484 bg_clip[axis][1] = clip[axis][1];
485 if (bb[axis][1] == clip[axis][1])
486 bg_clip[axis][1] += spill[axis][1];
488 xr_clip (xr, bg_clip);
489 xr_set_source_rgba (xr->cairo, bg);
491 bb[H][0] - spill[H][0],
492 bb[V][0] - spill[V][0],
493 bb[H][1] + spill[H][1],
494 bb[V][1] + spill[V][1]);
495 cairo_restore (xr->cairo);
497 cairo_save (xr->cairo);
498 if (!xr->style->use_system_colors)
499 xr_set_source_rgba (xr->cairo, &cell->font_style->fg[color_idx]);
501 bb[V][0] += valign_offset;
503 for (int axis = 0; axis < TABLE_N_AXES; axis++)
505 bb[axis][0] += px_to_xr (cell->cell_style->margin[axis][0]);
506 bb[axis][1] -= px_to_xr (cell->cell_style->margin[axis][1]);
508 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
509 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
510 cairo_restore (xr->cairo);
514 xrr_adjust_break (void *xr_, const struct table_cell *cell,
515 int width, int height)
517 struct xr_fsm *xr = xr_;
519 if (xrr_measure_cell_height (xr_, cell, width) < height)
522 const int (*margin)[2] = cell->cell_style->margin;
524 int bb[TABLE_N_AXES][2] = {
527 [H][1] = width - px_to_xr (margin[H][0] + margin[H][1]),
528 [V][1] = height - px_to_xr (margin[V][0] + margin[V][1]),
533 int clip[TABLE_N_AXES][2] = { { 0, 0 }, { 0, 0 } };
536 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
541 xrr_scale (void *xr_, double scale)
543 struct xr_fsm *xr = xr_;
544 cairo_scale (xr->cairo, scale, scale);
548 xr_clip (struct xr_fsm *xr, int clip[TABLE_N_AXES][2])
550 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
552 double x0 = xr_to_pt (clip[H][0]);
553 double y0 = xr_to_pt (clip[V][0]);
554 double x1 = xr_to_pt (clip[H][1]);
555 double y1 = xr_to_pt (clip[V][1]);
557 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
558 cairo_clip (xr->cairo);
563 add_attr (PangoAttrList *list, PangoAttribute *attr,
564 guint start_index, guint end_index)
566 attr->start_index = start_index;
567 attr->end_index = end_index;
568 pango_attr_list_insert (list, attr);
572 markup_escape (struct string *out, bool markup, const char *in, size_t len)
576 ds_put_substring (out, ss_buffer (in, len == -1 ? strlen (in) : len));
588 ds_put_cstr (out, "&");
591 ds_put_cstr (out, "<");
594 ds_put_cstr (out, ">");
597 ds_put_byte (out, c);
604 get_layout_dimension (PangoLayout *layout, enum table_axis axis)
606 int size[TABLE_N_AXES];
607 pango_layout_get_size (layout, &size[H], &size[V]);
611 static PangoFontDescription *
612 parse_font (const char *font, int default_size, bool bold, bool italic)
614 if (!c_strcasecmp (font, "Monospaced"))
617 PangoFontDescription *desc = pango_font_description_from_string (font);
621 /* If the font description didn't include an explicit font size, then set it
622 to DEFAULT_SIZE, which is in inch/72000 units. */
623 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
624 pango_font_description_set_size (desc,
625 (default_size / 1000.0) * PANGO_SCALE);
627 pango_font_description_set_weight (desc, (bold
629 : PANGO_WEIGHT_NORMAL));
630 pango_font_description_set_style (desc, (italic
632 : PANGO_STYLE_NORMAL));
638 xr_layout_cell_text (struct xr_fsm *xr, const struct table_cell *cell,
639 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
640 int *widthp, int *brk)
642 const struct pivot_table *pt = to_table_item (xr->item)->pt;
643 const struct font_style *font_style = cell->font_style;
644 const struct cell_style *cell_style = cell->cell_style;
645 unsigned int options = cell->options;
647 enum table_axis X = options & TAB_ROTATE ? V : H;
648 enum table_axis Y = !X;
649 int R = options & TAB_ROTATE ? 0 : 1;
651 PangoFontDescription *desc = NULL;
652 if (font_style->typeface)
654 font_style->typeface,
655 font_style->size ? font_style->size * 1000 : 10000,
656 font_style->bold, font_style->italic);
658 desc = xr->style->font;
661 PangoContext *context = pango_cairo_create_context (xr->cairo);
662 pango_cairo_context_set_resolution (context, xr->style->font_resolution);
663 PangoLayout *layout = pango_layout_new (context);
664 g_object_unref (context);
666 pango_layout_set_font_description (layout, desc);
668 struct string body = DS_EMPTY_INITIALIZER;
669 bool numeric = pivot_value_format_body (cell->value, pt, &body);
671 enum table_halign halign = table_halign_interpret (
672 cell->cell_style->halign, numeric);
674 if (cell_style->halign == TABLE_HALIGN_DECIMAL
675 && !(cell->options & TAB_ROTATE))
677 int margin_adjustment = -px_to_xr (cell_style->decimal_offset);
679 const char *decimal = strrchr (ds_cstr (&body),
680 cell_style->decimal_char);
683 pango_layout_set_text (layout, decimal, strlen (decimal));
684 pango_layout_set_width (layout, -1);
685 margin_adjustment += get_layout_dimension (layout, H);
688 if (margin_adjustment < 0)
689 bb[H][1] += margin_adjustment;
692 PangoAttrList *attrs = NULL;
694 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
695 Pango's implementation of it): it will break after a period or a comma
696 that precedes a digit, e.g. in ".000" it will break after the period.
697 This code looks for such a situation and inserts a U+2060 WORD JOINER
698 to prevent the break.
700 This isn't necessary when the decimal point is between two digits
701 (e.g. "0.000" won't be broken) or when the display width is not limited so
702 that word wrapping won't happen.
704 It isn't necessary to look for more than one period or comma, as would
705 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
706 are present then there will always be a digit on both sides of every
708 bool markup = cell->font_style->markup;
711 PangoAttrList *new_attrs;
713 if (pango_parse_markup (ds_cstr (&body), -1, 0,
714 &new_attrs, &new_text, NULL, NULL))
718 body.ss = ss_cstr (new_text);
719 body.capacity = body.ss.length;
723 /* XXX should we report the error? */
726 else if (options & TAB_ROTATE || bb[H][1] != INT_MAX)
728 const char *text = ds_cstr (&body);
729 const char *decimal = text + strcspn (text, ".,");
731 && c_isdigit (decimal[1])
732 && (decimal == text || !c_isdigit (decimal[-1])))
734 struct string tmp = DS_EMPTY_INITIALIZER;
735 ds_extend (&tmp, ds_length (&body) + 16);
736 markup_escape (&tmp, markup, text, decimal - text + 1);
737 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
738 markup_escape (&tmp, markup, decimal + 1, -1);
739 ds_swap (&tmp, &body);
744 if (font_style->underline)
747 attrs = pango_attr_list_new ();
748 pango_attr_list_insert (attrs, pango_attr_underline_new (
749 PANGO_UNDERLINE_SINGLE));
752 const struct pivot_value *value = cell->value;
753 if (value->n_footnotes || value->n_subscripts)
755 size_t subscript_ofs = ds_length (&body);
756 for (size_t i = 0; i < value->n_subscripts; i++)
759 ds_put_byte (&body, ',');
760 ds_put_cstr (&body, value->subscripts[i]);
763 size_t footnote_ofs = ds_length (&body);
764 for (size_t i = 0; i < value->n_footnotes; i++)
767 ds_put_byte (&body, ',');
769 size_t idx = value->footnote_indexes[i];
770 pivot_footnote_format_marker (pt->footnotes[idx], pt, &body);
773 /* Allow footnote markers to occupy the right margin. That way, numbers
774 in the column are still aligned. */
775 if (value->n_footnotes && halign == TABLE_HALIGN_RIGHT)
777 /* Measure the width of the footnote marker, so we know how much we
778 need to make room for. */
779 pango_layout_set_text (layout, ds_cstr (&body) + footnote_ofs,
780 ds_length (&body) - footnote_ofs);
782 PangoAttrList *fn_attrs = pango_attr_list_new ();
783 pango_attr_list_insert (
784 fn_attrs, pango_attr_scale_new (PANGO_SCALE_SMALL));
785 pango_attr_list_insert (fn_attrs, pango_attr_rise_new (3000));
786 pango_layout_set_attributes (layout, fn_attrs);
787 pango_attr_list_unref (fn_attrs);
788 int footnote_width = get_layout_dimension (layout, X);
790 /* Bound the adjustment by the width of the right margin. */
791 int right_margin = px_to_xr (cell_style->margin[X][R]);
792 int footnote_adjustment = MIN (footnote_width, right_margin);
794 /* Adjust the bounding box. */
795 if (options & TAB_ROTATE)
796 footnote_adjustment = -footnote_adjustment;
797 bb[X][R] += footnote_adjustment;
800 pango_layout_set_attributes (layout, NULL);
803 /* Set attributes. */
805 attrs = pango_attr_list_new ();
806 add_attr (attrs, pango_attr_font_desc_new (desc), subscript_ofs,
807 PANGO_ATTR_INDEX_TO_TEXT_END);
808 add_attr (attrs, pango_attr_scale_new (PANGO_SCALE_SMALL),
809 subscript_ofs, PANGO_ATTR_INDEX_TO_TEXT_END);
810 if (value->n_subscripts)
811 add_attr (attrs, pango_attr_rise_new (-3000), subscript_ofs,
812 footnote_ofs - subscript_ofs);
813 if (value->n_footnotes)
815 bool superscript = pt->look->footnote_marker_superscripts;
816 add_attr (attrs, pango_attr_rise_new (superscript ? 3000 : -3000),
817 footnote_ofs, PANGO_ATTR_INDEX_TO_TEXT_END);
821 /* Set the attributes, if any. */
824 pango_layout_set_attributes (layout, attrs);
825 pango_attr_list_unref (attrs);
829 pango_layout_set_text (layout, ds_cstr (&body), ds_length (&body));
831 pango_layout_set_alignment (layout,
832 (halign == TABLE_HALIGN_RIGHT ? PANGO_ALIGN_RIGHT
833 : halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
834 : PANGO_ALIGN_CENTER));
835 pango_layout_set_width (
837 bb[X][1] == INT_MAX ? -1 : xr_to_pango (bb[X][1] - bb[X][0]));
838 pango_layout_set_wrap (layout, PANGO_WRAP_WORD);
840 int size[TABLE_N_AXES];
841 pango_layout_get_size (layout, &size[H], &size[V]);
843 if (clip[H][0] != clip[H][1])
845 cairo_save (xr->cairo);
846 if (!(options & TAB_ROTATE))
848 if (options & TAB_ROTATE)
850 int extra = bb[H][1] - bb[H][0] - size[V];
851 int halign_offset = extra > 0 ? extra / 2 : 0;
852 cairo_translate (xr->cairo,
853 xr_to_pt (bb[H][0] + halign_offset),
854 xr_to_pt (bb[V][1]));
855 cairo_rotate (xr->cairo, -M_PI_2);
858 cairo_translate (xr->cairo,
860 xr_to_pt (bb[V][0]));
861 pango_cairo_show_layout (xr->cairo, layout);
863 /* If enabled, this draws a blue rectangle around the extents of each
864 line of text, which can be rather useful for debugging layout
868 PangoLayoutIter *iter;
869 iter = pango_layout_get_iter (layout);
872 PangoRectangle extents;
874 pango_layout_iter_get_line_extents (iter, &extents, NULL);
875 cairo_save (xr->cairo);
876 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
879 pango_to_xr (extents.x),
880 pango_to_xr (extents.y),
881 pango_to_xr (extents.x + extents.width),
882 pango_to_xr (extents.y + extents.height));
883 cairo_restore (xr->cairo);
885 while (pango_layout_iter_next_line (iter));
886 pango_layout_iter_free (iter);
889 cairo_restore (xr->cairo);
892 int w = pango_to_xr (size[X]);
893 int h = pango_to_xr (size[Y]);
896 if (bb[V][0] + h >= bb[V][1] && !(options & TAB_ROTATE))
898 PangoLayoutIter *iter;
901 /* Choose a breakpoint between lines instead of in the middle of one. */
902 iter = pango_layout_get_iter (layout);
905 PangoRectangle extents;
909 pango_layout_iter_get_line_extents (iter, NULL, &extents);
910 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
911 extents.x = pango_to_xr (extents.x);
912 extents.y = pango_to_xr (y0);
913 extents.width = pango_to_xr (extents.width);
914 extents.height = pango_to_xr (y1 - y0);
915 bottom = bb[V][0] + extents.y + extents.height;
916 if (bottom < bb[V][1])
918 if (brk && clip[H][0] != clip[H][1])
926 while (pango_layout_iter_next_line (iter));
927 pango_layout_iter_free (iter);
929 /* If enabled, draws a green line across the chosen breakpoint, which can
930 be useful for debugging issues with breaking. */
934 xr_draw_line (xr, 0, best,
935 xr->style->size[H], best,
937 &(struct cell_color) CELL_COLOR (0, 255, 0));
941 pango_layout_set_attributes (layout, NULL);
943 if (desc != xr->style->font)
944 pango_font_description_free (desc);
945 g_object_unref (G_OBJECT (layout));
952 xr_layout_cell (struct xr_fsm *xr, const struct table_cell *cell,
953 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
954 int *width, int *height, int *brk)
959 /* If enabled, draws a blue rectangle around the cell extents, which can be
960 useful for debugging layout. */
963 if (clip[H][0] != clip[H][1])
965 cairo_save (xr->cairo);
966 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
967 xr_draw_rectangle (xr, bb[H][0], bb[V][0], bb[H][1], bb[V][1]);
968 cairo_restore (xr->cairo);
974 *height = xr_layout_cell_text (xr, cell, bb, clip, width, brk);
977 #define CHART_WIDTH 500
978 #define CHART_HEIGHT 375
980 static struct xr_fsm *
981 xr_fsm_create (const struct output_item *item_,
982 const struct xr_fsm_style *style, cairo_t *cr,
985 if (is_page_setup_item (item_)
986 || is_group_open_item (item_)
987 || is_group_close_item (item_))
990 struct output_item *item;
991 if (is_table_item (item_)
992 || is_chart_item (item_)
993 || is_image_item (item_)
994 || is_page_eject_item (item_))
995 item = output_item_ref (item_);
996 else if (is_message_item (item_))
997 item = table_item_super (
998 text_item_to_table_item (
999 message_item_to_text_item (
1001 output_item_ref (item_)))));
1002 else if (is_text_item (item_))
1004 if (to_text_item (item_)->type == TEXT_ITEM_PAGE_TITLE)
1007 item = table_item_super (
1008 text_item_to_table_item (
1010 output_item_ref (item_))));
1012 else if (is_group_open_item (item_))
1014 item = table_item_super (
1015 text_item_to_table_item (
1016 text_item_create (TEXT_ITEM_TITLE,
1017 to_group_open_item (item_)->command_name,
1022 assert (is_table_item (item)
1023 || is_chart_item (item)
1024 || is_image_item (item)
1025 || is_page_eject_item (item));
1027 size_t *layer_indexes = NULL;
1028 if (is_table_item (item))
1030 const struct table_item *table_item = to_table_item (item);
1031 layer_indexes = pivot_output_next_layer (table_item->pt, NULL, print);
1036 static const struct render_ops xrr_render_ops = {
1037 .measure_cell_width = xrr_measure_cell_width,
1038 .measure_cell_height = xrr_measure_cell_height,
1039 .adjust_break = xrr_adjust_break,
1040 .draw_line = xrr_draw_line,
1041 .draw_cell = xrr_draw_cell,
1045 enum { LW = XR_LINE_WIDTH, LS = XR_LINE_SPACE };
1046 static const int xr_line_widths[RENDER_N_LINES] =
1048 [RENDER_LINE_NONE] = 0,
1049 [RENDER_LINE_SINGLE] = LW,
1050 [RENDER_LINE_DASHED] = LW,
1051 [RENDER_LINE_THICK] = LW * 2,
1052 [RENDER_LINE_THIN] = LW / 2,
1053 [RENDER_LINE_DOUBLE] = 2 * LW + LS,
1056 struct xr_fsm *fsm = xmalloc (sizeof *fsm);
1057 *fsm = (struct xr_fsm) {
1058 .style = xr_fsm_style_ref (style),
1061 .layer_indexes = layer_indexes,
1063 .ops = &xrr_render_ops,
1065 .size = { [H] = style->size[H], [V] = style->size[V] },
1066 .line_widths = xr_line_widths,
1067 .min_break = { [H] = style->min_break[H], [V] = style->min_break[V] },
1068 .supports_margins = true,
1069 .rtl = render_direction_rtl (),
1074 /* Get font size. */
1075 PangoContext *context = pango_cairo_create_context (cr);
1076 pango_cairo_context_set_resolution (context, style->font_resolution);
1077 PangoLayout *layout = pango_layout_new (context);
1078 g_object_unref (context);
1080 pango_layout_set_font_description (layout, style->font);
1082 pango_layout_set_text (layout, "0", 1);
1084 int char_size[TABLE_N_AXES];
1085 pango_layout_get_size (layout, &char_size[H], &char_size[V]);
1086 for (int a = 0; a < TABLE_N_AXES; a++)
1088 int csa = pango_to_xr (char_size[a]);
1089 fsm->rp.font_size[a] = MAX (fsm->rp.font_size[a], csa);
1092 g_object_unref (G_OBJECT (layout));
1094 if (is_table_item (item))
1096 struct table_item *table_item = to_table_item (item);
1099 fsm->p = render_pager_create (&fsm->rp, table_item, fsm->layer_indexes);
1107 xr_fsm_create_for_printing (const struct output_item *item,
1108 const struct xr_fsm_style *style, cairo_t *cr)
1110 return xr_fsm_create (item, style, cr, true);
1114 xr_fsm_destroy (struct xr_fsm *fsm)
1118 xr_fsm_style_unref (fsm->style);
1119 output_item_unref (fsm->item);
1120 free (fsm->layer_indexes);
1121 render_pager_destroy (fsm->p);
1122 assert (!fsm->cairo);
1127 /* Scrolling API. */
1130 xr_fsm_create_for_scrolling (const struct output_item *item,
1131 const struct xr_fsm_style *style, cairo_t *cr)
1133 return xr_fsm_create (item, style, cr, false);
1137 xr_fsm_measure (struct xr_fsm *fsm, cairo_t *cr, int *wp, int *hp)
1139 assert (!fsm->print);
1143 if (is_table_item (fsm->item))
1146 w = render_pager_get_size (fsm->p, H) / XR_POINT;
1147 h = render_pager_get_size (fsm->p, V) / XR_POINT;
1150 else if (is_chart_item (fsm->item))
1155 else if (is_image_item (fsm->item))
1157 cairo_surface_t *image = to_image_item (fsm->item)->image;
1158 w = cairo_image_surface_get_width (image);
1159 h = cairo_image_surface_get_height (image);
1171 xr_fsm_draw_all (struct xr_fsm *fsm, cairo_t *cr)
1173 assert (!fsm->print);
1174 xr_fsm_draw_region (fsm, cr, 0, 0, INT_MAX, INT_MAX);
1178 mul_XR_POINT (int x)
1180 return (x >= INT_MAX / XR_POINT ? INT_MAX
1181 : x <= INT_MIN / XR_POINT ? INT_MIN
1186 draw_image (cairo_surface_t *image, cairo_t *cr)
1189 cairo_set_source_surface (cr, image, 0, 0);
1190 cairo_rectangle (cr, 0, 0, cairo_image_surface_get_width (image),
1191 cairo_image_surface_get_height (image));
1198 xr_fsm_draw_region (struct xr_fsm *fsm, cairo_t *cr,
1199 int x, int y, int w, int h)
1201 assert (!fsm->print);
1202 if (is_table_item (fsm->item))
1205 render_pager_draw_region (fsm->p, mul_XR_POINT (x), mul_XR_POINT (y),
1206 mul_XR_POINT (w), mul_XR_POINT (h));
1209 else if (is_image_item (fsm->item))
1210 draw_image (to_image_item (fsm->item)->image, cr);
1211 else if (is_chart_item (fsm->item))
1212 xr_draw_chart (to_chart_item (fsm->item), cr, CHART_WIDTH, CHART_HEIGHT);
1213 else if (is_page_eject_item (fsm->item))
1215 /* Nothing to do. */
1224 xr_fsm_draw_table (struct xr_fsm *fsm, int space)
1226 struct table_item *table_item = to_table_item (fsm->item);
1227 int used = render_pager_draw_next (fsm->p, space);
1228 if (!render_pager_has_next (fsm->p))
1230 render_pager_destroy (fsm->p);
1232 fsm->layer_indexes = pivot_output_next_layer (table_item->pt,
1233 fsm->layer_indexes, true);
1234 if (fsm->layer_indexes)
1236 fsm->p = render_pager_create (&fsm->rp, table_item,
1237 fsm->layer_indexes);
1238 if (table_item->pt->look->paginate_layers)
1241 used += fsm->style->object_spacing;
1249 return MIN (used, space);
1253 xr_fsm_draw_chart (struct xr_fsm *fsm, int space)
1255 const int chart_height = 0.8 * MIN (fsm->rp.size[H], fsm->rp.size[V]);
1256 if (space < chart_height)
1260 xr_draw_chart (to_chart_item (fsm->item), fsm->cairo,
1261 xr_to_pt (fsm->rp.size[H]), xr_to_pt (chart_height));
1262 return chart_height;
1266 xr_fsm_draw_image (struct xr_fsm *fsm, int space)
1268 cairo_surface_t *image = to_image_item (fsm->item)->image;
1269 int width = cairo_image_surface_get_width (image) * XR_POINT;
1270 int height = cairo_image_surface_get_height (image) * XR_POINT;
1271 if (!width || !height)
1274 if (height > fsm->rp.size[V])
1276 double scale = fsm->rp.size[V] / (double) height;
1279 if (!width || !height)
1282 cairo_scale (fsm->cairo, scale, scale);
1285 if (width > fsm->rp.size[H])
1287 double scale = fsm->rp.size[H] / (double) width;
1290 if (!width || !height)
1293 cairo_scale (fsm->cairo, scale, scale);
1299 draw_image (image, fsm->cairo);
1309 xr_fsm_draw_eject (struct xr_fsm *fsm, int space)
1311 if (space >= fsm->rp.size[V])
1317 xr_fsm_draw_slice (struct xr_fsm *fsm, cairo_t *cr, int space)
1319 assert (fsm->print);
1321 if (fsm->done || space <= 0)
1326 int used = (is_table_item (fsm->item) ? xr_fsm_draw_table (fsm, space)
1327 : is_chart_item (fsm->item) ? xr_fsm_draw_chart (fsm, space)
1328 : is_image_item (fsm->item) ? xr_fsm_draw_image (fsm, space)
1329 : is_page_eject_item (fsm->item) ? xr_fsm_draw_eject (fsm, space)
1338 xr_fsm_is_empty (const struct xr_fsm *fsm)
1340 assert (fsm->print);