1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009, 2010, 2014, 2020 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-pager.h"
22 #include <pango/pango-layout.h>
23 #include <pango/pangocairo.h>
25 #include "output/driver-provider.h"
27 #include "gl/xalloc.h"
30 #define _(msgid) gettext (msgid)
32 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
36 struct xr_page_style *
37 xr_page_style_ref (const struct xr_page_style *ps_)
39 struct xr_page_style *ps = CONST_CAST (struct xr_page_style *, ps_);
40 assert (ps->ref_cnt > 0);
45 struct xr_page_style *
46 xr_page_style_unshare (struct xr_page_style *old)
48 assert (old->ref_cnt > 0);
49 if (old->ref_cnt == 1)
52 xr_page_style_unref (old);
54 struct xr_page_style *new = xmemdup (old, sizeof *old);
56 for (int i = 0; i < 2; i++)
57 page_heading_copy (&new->headings[i], &old->headings[i]);
63 xr_page_style_unref (struct xr_page_style *ps)
67 assert (ps->ref_cnt > 0);
70 for (int i = 0; i < 2; i++)
71 page_heading_uninit (&ps->headings[i]);
78 xr_page_style_equals (const struct xr_page_style *a,
79 const struct xr_page_style *b)
81 for (int i = 0; i < TABLE_N_AXES; i++)
82 for (int j = 0; j < 2; j++)
83 if (a->margins[i][j] != b->margins[i][j])
86 for (int i = 0; i < 2; i++)
87 if (!page_heading_equals (&a->headings[i], &b->headings[i]))
90 return (a->initial_page_number == b->initial_page_number
91 && a->object_spacing == b->object_spacing);
96 struct xr_page_style *page_style;
97 struct xr_fsm_style *fsm_style;
99 int heading_heights[2];
101 /* Current output item. */
103 struct output_item *item;
105 /* Current output page. */
110 static void xr_pager_run (struct xr_pager *);
112 /* Conversions to and from points. */
116 return x / (double) XR_POINT;
120 pango_to_xr (int pango)
122 return (XR_POINT != PANGO_SCALE
123 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
130 return (XR_POINT != PANGO_SCALE
131 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
136 get_layout_height (PangoLayout *layout)
139 pango_layout_get_size (layout, &w, &h);
144 xr_render_page_heading (cairo_t *cairo, const PangoFontDescription *font,
145 const struct page_heading *ph, int page_number,
146 int width, bool draw, int base_y)
148 PangoLayout *layout = pango_cairo_create_layout (cairo);
149 pango_layout_set_font_description (layout, font);
152 for (size_t i = 0; i < ph->n; i++)
154 const struct page_paragraph *pp = &ph->paragraphs[i];
156 char *markup = output_driver_substitute_heading_vars (pp->markup,
158 pango_layout_set_markup (layout, markup, -1);
161 pango_layout_set_alignment (
163 (pp->halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
164 : pp->halign == TABLE_HALIGN_CENTER ? PANGO_ALIGN_CENTER
165 : pp->halign == TABLE_HALIGN_MIXED ? PANGO_ALIGN_LEFT
166 : PANGO_ALIGN_RIGHT));
167 pango_layout_set_width (layout, xr_to_pango (width));
171 cairo_translate (cairo, 0, xr_to_pt (y + base_y));
172 pango_cairo_show_layout (cairo, layout);
173 cairo_restore (cairo);
176 y += pango_to_xr (get_layout_height (layout));
179 g_object_unref (G_OBJECT (layout));
185 xr_measure_headings (const struct xr_page_style *ps,
186 const struct xr_fsm_style *fs,
187 int heading_heights[2])
189 cairo_surface_t *surface = cairo_recording_surface_create (
190 CAIRO_CONTENT_COLOR, NULL);
191 cairo_t *cairo = cairo_create (surface);
192 for (int i = 0; i < 2; i++)
194 int *h = &heading_heights[i];
195 *h = xr_render_page_heading (cairo, fs->fonts[XR_FONT_PROPORTIONAL],
196 &ps->headings[i], -1, fs->size[H], false,
199 *h += ps->object_spacing;
201 cairo_destroy (cairo);
202 cairo_surface_destroy (surface);
206 xr_pager_create (const struct xr_page_style *ps_,
207 const struct xr_fsm_style *fs_)
209 printf ("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
210 struct xr_page_style *ps = xr_page_style_ref (ps_);
211 struct xr_fsm_style *fs = xr_fsm_style_ref (fs_);
213 int heading_heights[2];
214 xr_measure_headings (ps, fs, heading_heights);
215 int total = heading_heights[0] + heading_heights[1];
216 if (total > 0 && total < fs->size[V])
218 fs = xr_fsm_style_unshare (fs);
219 ps = xr_page_style_unshare (ps);
221 for (int i = 0; i < 2; i++)
222 ps->margins[V][i] += heading_heights[i];
223 fs->size[V] -= total;
226 struct xr_pager *p = xmalloc (sizeof *p);
227 *p = (struct xr_pager) { .page_style = ps, .fsm_style = fs };
232 xr_pager_destroy (struct xr_pager *p)
236 printf (">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
237 xr_page_style_unref (p->page_style);
238 xr_fsm_style_unref (p->fsm_style);
240 xr_fsm_destroy (p->fsm);
241 output_item_unref (p->item);
245 cairo_restore (p->cr);
246 cairo_destroy (p->cr);
253 xr_pager_has_item (const struct xr_pager *p)
255 return p->item != NULL;
259 xr_pager_add_item (struct xr_pager *p, const struct output_item *item)
261 printf ("add_item\n");
263 p->item = output_item_ref (item);
268 xr_pager_has_page (const struct xr_pager *p)
274 xr_pager_add_page (struct xr_pager *p, cairo_t *cr)
276 printf ("add_page\n");
282 const struct xr_fsm_style *fs = p->fsm_style;
283 const struct xr_page_style *ps = p->page_style;
284 const struct cell_color *bg = &ps->bg;
288 cairo_set_source_rgba (cr, bg->r / 255.0, bg->g / 255.0,
289 bg->b / 255.0, bg->alpha / 255.0);
290 cairo_rectangle (cr, 0, 0, fs->size[H], fs->size[V]);
295 xr_to_pt (ps->margins[H][0]),
296 xr_to_pt (ps->margins[V][0]));
298 const PangoFontDescription *font = fs->fonts[XR_FONT_PROPORTIONAL];
299 int page_number = p->page_index++ + ps->initial_page_number;
300 if (p->heading_heights[0])
301 xr_render_page_heading (cr, font, &ps->headings[0], page_number,
302 fs->size[H], true, -p->heading_heights[0]);
304 if (p->heading_heights[1])
305 xr_render_page_heading (cr, font, &ps->headings[1], page_number,
307 fs->size[V] + ps->object_spacing);
313 xr_pager_needs_new_page (struct xr_pager *p)
315 if (p->item && (!p->cr || p->y >= p->fsm_style->size[V]))
319 cairo_restore (p->cr);
320 cairo_destroy (p->cr);
330 xr_pager_run (struct xr_pager *p)
333 if (p->item && p->cr && p->y < p->fsm_style->size[V])
337 printf ("\tcreate fsm\n");
338 p->fsm = xr_fsm_create (p->item, p->fsm_style, p->cr);
341 printf ("\t(was null)\n");
342 output_item_unref (p->item);
351 printf ("\tdraw slice\n");
352 int spacing = p->page_style->object_spacing;
353 int chunk = xr_fsm_draw_slice (p->fsm, p->cr,
354 p->fsm_style->size[V] - p->y);
355 p->y += chunk + spacing;
356 cairo_translate (p->cr, 0, xr_to_pt (chunk + spacing));
358 if (xr_fsm_is_empty (p->fsm))
360 printf ("\tfinished object\n");
361 xr_fsm_destroy (p->fsm);
363 output_item_unref (p->item);
369 printf ("\tobject doesn't fit on page\n");
374 printf ("\tneed to draw another slice\n");
378 printf ("\tno item\n");
380 printf ("\tno page\n");