pintos-os.org Git - pspp/blob - src/ui/gui/psppire-output-view.c

   1 /* PSPPIRE - a graphical user interface for PSPP.
   2    Copyright (C) 2008-2015 Free Software Foundation.
   3
   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.
   8
   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.
  13
  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/>. */
  16
  17 #include <config.h>
  18
  19 #include "ui/gui/psppire-output-view.h"
  20
  21 #include <errno.h>
  22 #include <stdbool.h>
  23
  24 #include "libpspp/assertion.h"
  25 #include "libpspp/string-map.h"
  26 #include "output/cairo.h"
  27 #include "output/driver-provider.h"
  28 #include "output/driver.h"
  29 #include "output/chart-item.h"
  30 #include "output/message-item.h"
  31 #include "output/output-item.h"
  32 #include "output/table-item.h"
  33 #include "output/text-item.h"
  34
  35 #include "gl/c-xvasprintf.h"
  36 #include "gl/minmax.h"
  37 #include "gl/tmpdir.h"
  38 #include "gl/xalloc.h"
  39
  40 #include <gettext.h>
  41 #define _(msgid) gettext (msgid)
  42
  43 struct output_view_item
  44   {
  45     struct output_item *item;
  46     GtkWidget *drawing_area;
  47   };
  48
  49 struct psppire_output_view
  50   {
  51     struct xr_driver *xr;
  52     int font_height;
  53
  54     GtkLayout *output;
  55     int render_width;
  56     int max_width;
  57     glong y;
  58
  59     struct string_map render_opts;
  60     GtkTreeView *overview;
  61     GtkTreeIter cur_command;
  62     bool in_command;
  63
  64     GtkWidget *toplevel;
  65
  66     struct output_view_item *items;
  67     size_t n_items, allocated_items;
  68
  69     /* Variables pertaining to printing */
  70     GtkPrintSettings *print_settings;
  71     struct xr_driver *print_xrd;
  72     int print_item;
  73     int print_n_pages;
  74     gboolean paginated;
  75   };
  76
  77 enum
  78   {
  79     COL_NAME,                   /* Table name. */
  80     COL_ADDR,                   /* Pointer to the table */
  81     COL_Y,                      /* Y position of top of name. */
  82     N_COLS
  83   };
  84
  85 static gboolean
  86 draw_callback (GtkWidget *widget, cairo_t *cr, gpointer data)
  87 {
  88   struct xr_rendering *r = g_object_get_data (G_OBJECT (widget), "rendering");
  89   xr_rendering_draw_all (r, cr);
  90   return TRUE;
  91 }
  92
  93 static void
  94 free_rendering (gpointer rendering_)
  95 {
  96   struct xr_rendering *rendering = rendering_;
  97   xr_rendering_destroy (rendering);
  98 }
  99
 100 static void
 101 create_xr (struct psppire_output_view *view)
 102 {
 103   struct text_item *text_item;
 104   PangoFontDescription *font_desc;
 105   struct xr_rendering *r;
 106   char *font_name;
 107   int font_width;
 108   cairo_t *cr;
 109   gchar *fgc;
 110
 111   GtkStyleContext *context = gtk_widget_get_style_context (GTK_WIDGET (view->output));
 112   GtkStateFlags state = gtk_widget_get_state_flags (GTK_WIDGET (view->output));
 113   GdkRGBA *fg_color;
 114
 115   gtk_style_context_get (context, state,
 116     "font", &font_desc, "color", &fg_color, NULL);
 117
 118   cr = gdk_cairo_create (gtk_widget_get_window (GTK_WIDGET (view->output)));
 119
 120   /* Set the widget's text color as the foreground color for the output driver */
 121   /* gdk_rgba_to_string() would be perfect, but xr's parse_color does not      */
 122   /* understand the rgb(255,128,33) format. Therefore we do it ourself.        */
 123   fgc = xasprintf("#%4x%4x%4x",(int)(fg_color->red*0xffff),
 124     (int)(fg_color->green*0xffff),(int)(fg_color->blue*0xffff));
 125   string_map_insert (&view->render_opts, "foreground-color", fgc);
 126   g_free (fgc);
 127   gdk_rgba_free (fg_color);
 128
 129   /* Use GTK+ default font as proportional font. */
 130   font_name = pango_font_description_to_string (font_desc);
 131   string_map_insert (&view->render_opts, "prop-font", font_name);
 132   g_free (font_name);
 133
 134   /* Derived emphasized font from proportional font. */
 135   pango_font_description_set_style (font_desc, PANGO_STYLE_ITALIC);
 136   font_name = pango_font_description_to_string (font_desc);
 137   string_map_insert (&view->render_opts, "emph-font", font_name);
 138   g_free (font_name);
 139   pango_font_description_free (font_desc);
 140
 141   /* Pretend that the "page" has a reasonable width and a very big length,
 142      so that most tables can be conveniently viewed on-screen with vertical
 143      scrolling only.  (The length should not be increased very much because
 144      it is already close enough to INT_MAX when expressed as thousands of a
 145      point.) */
 146   string_map_insert_nocopy (&view->render_opts, xstrdup ("paper-size"),
 147                             xasprintf ("%dx1000000pt", view->render_width));
 148   string_map_insert (&view->render_opts, "left-margin", "0");
 149   string_map_insert (&view->render_opts, "right-margin", "0");
 150   string_map_insert (&view->render_opts, "top-margin", "0");
 151   string_map_insert (&view->render_opts, "bottom-margin", "0");
 152
 153   view->xr = xr_driver_create (cr, &view->render_opts);
 154
 155   text_item = text_item_create (TEXT_ITEM_PARAGRAPH, "X");
 156   r = xr_rendering_create (view->xr, text_item_super (text_item), cr);
 157   xr_rendering_measure (r, &font_width, &view->font_height);
 158   text_item_unref (text_item);
 159
 160   cairo_destroy (cr);
 161 }
 162
 163 static void
 164 create_drawing_area (struct psppire_output_view *view,
 165                      GtkWidget *drawing_area, struct xr_rendering *r,
 166                      int tw, int th)
 167 {
 168   g_object_set_data_full (G_OBJECT (drawing_area),
 169                           "rendering", r, free_rendering);
 170
 171   g_signal_connect (drawing_area, "draw",
 172                     G_CALLBACK (draw_callback), view);
 173
 174   gtk_widget_set_size_request (drawing_area, tw, th);
 175   gtk_layout_put (view->output, drawing_area, 0, view->y);
 176
 177   gtk_widget_show (drawing_area);
 178 }
 179
 180 static void
 181 rerender (struct psppire_output_view *view)
 182 {
 183   struct output_view_item *item;
 184   cairo_t *cr;
 185
 186   if (!view->n_items || !gtk_widget_get_window (GTK_WIDGET (view->output)))
 187     return;
 188
 189   cr = gdk_cairo_create (gtk_widget_get_window (GTK_WIDGET (view->output)));
 190   if (view->xr == NULL)
 191     create_xr (view);
 192   view->y = 0;
 193   view->max_width = 0;
 194   for (item = view->items; item < &view->items[view->n_items]; item++)
 195     {
 196       struct xr_rendering *r;
 197       GtkAllocation alloc;
 198       int tw, th;
 199
 200       if (view->y > 0)
 201         view->y += view->font_height / 2;
 202
 203       r = xr_rendering_create (view->xr, item->item, cr);
 204       if (r == NULL)
 205         {
 206           g_warn_if_reached ();
 207           continue;
 208         }
 209
 210       xr_rendering_measure (r, &tw, &th);
 211
 212       if (!item->drawing_area)
 213         {
 214           item->drawing_area = gtk_drawing_area_new ();
 215           create_drawing_area (view, item->drawing_area, r, tw, th);
 216         }
 217       else
 218         {
 219           g_object_set_data_full (G_OBJECT (item->drawing_area),
 220                                   "rendering", r, free_rendering);
 221           gtk_widget_set_size_request (item->drawing_area, tw, th);
 222           gtk_layout_move (view->output, item->drawing_area, 0, view->y);
 223         }
 224
 225       alloc.x = 0;
 226       alloc.y = view->y;
 227       alloc.width = tw;
 228       alloc.height = th;
 229       gtk_widget_size_allocate(item->drawing_area,&alloc);
 230
 231       if (view->max_width < tw)
 232         view->max_width = tw;
 233       view->y += th;
 234     }
 235
 236   gtk_layout_set_size (view->output, view->max_width, view->y);
 237   cairo_destroy (cr);
 238 }
 239
 240 void
 241 psppire_output_view_put (struct psppire_output_view *view,
 242                          const struct output_item *item)
 243 {
 244   struct output_view_item *view_item;
 245   GtkWidget *drawing_area;
 246   struct xr_rendering *r;
 247   struct string name;
 248   GtkTreeStore *store;
 249   cairo_t *cr = NULL;
 250   GtkTreePath *path;
 251   GtkTreeIter iter;
 252   int tw, th;
 253
 254   if (is_text_item (item))
 255     {
 256       const struct text_item *text_item = to_text_item (item);
 257       enum text_item_type type = text_item_get_type (text_item);
 258       const char *text = text_item_get_text (text_item);
 259
 260       if (type == TEXT_ITEM_COMMAND_CLOSE)
 261         {
 262           view->in_command = false;
 263           return;
 264         }
 265       else if (text[0] == '\0')
 266         return;
 267     }
 268
 269   if (view->n_items >= view->allocated_items)
 270     view->items = x2nrealloc (view->items, &view->allocated_items,
 271                                 sizeof *view->items);
 272   view_item = &view->items[view->n_items++];
 273   view_item->item = output_item_ref (item);
 274   view_item->drawing_area = NULL;
 275
 276   if (gtk_widget_get_window (GTK_WIDGET (view->output)))
 277     {
 278       view_item->drawing_area = drawing_area = gtk_drawing_area_new ();
 279
 280       cr = gdk_cairo_create (gtk_widget_get_window (GTK_WIDGET (view->output)));
 281       if (view->xr == NULL)
 282         create_xr (view);
 283
 284       if (view->y > 0)
 285         view->y += view->font_height / 2;
 286
 287       r = xr_rendering_create (view->xr, item, cr);
 288       if (r == NULL)
 289         goto done;
 290
 291       xr_rendering_measure (r, &tw, &th);
 292
 293       create_drawing_area (view, drawing_area, r, tw, th);
 294     }
 295   else
 296     tw = th = 0;
 297
 298   if (view->overview
 299       && (!is_text_item (item)
 300           || text_item_get_type (to_text_item (item)) != TEXT_ITEM_SYNTAX
 301           || !view->in_command))
 302     {
 303       store = GTK_TREE_STORE (gtk_tree_view_get_model (view->overview));
 304
 305       ds_init_empty (&name);
 306       if (is_text_item (item)
 307           && text_item_get_type (to_text_item (item)) == TEXT_ITEM_COMMAND_OPEN)
 308         {
 309           gtk_tree_store_append (store, &iter, NULL);
 310           view->cur_command = iter; /* XXX shouldn't save a GtkTreeIter */
 311           view->in_command = true;
 312         }
 313       else
 314         {
 315           GtkTreeIter *p = view->in_command ? &view->cur_command : NULL;
 316           gtk_tree_store_append (store, &iter, p);
 317         }
 318
 319       ds_clear (&name);
 320       if (is_text_item (item))
 321         ds_put_cstr (&name, text_item_get_text (to_text_item (item)));
 322       else if (is_message_item (item))
 323         {
 324           const struct message_item *msg_item = to_message_item (item);
 325           const struct msg *msg = message_item_get_msg (msg_item);
 326           ds_put_format (&name, "%s: %s", _("Message"),
 327                          msg_severity_to_string (msg->severity));
 328         }
 329       else if (is_table_item (item))
 330         {
 331           const char *title = table_item_get_title (to_table_item (item));
 332           if (title != NULL)
 333             ds_put_format (&name, "Table: %s", title);
 334           else
 335             ds_put_cstr (&name, "Table");
 336         }
 337       else if (is_chart_item (item))
 338         {
 339           const char *s = chart_item_get_title (to_chart_item (item));
 340           if (s != NULL)
 341             ds_put_format (&name, "Chart: %s", s);
 342           else
 343             ds_put_cstr (&name, "Chart");
 344         }
 345       gtk_tree_store_set (store, &iter,
 346                           COL_NAME, ds_cstr (&name),
 347                           COL_ADDR, item,
 348                           COL_Y, (view->y),
 349                           -1);
 350       ds_destroy (&name);
 351
 352       path = gtk_tree_model_get_path (GTK_TREE_MODEL (store), &iter);
 353       gtk_tree_view_expand_row (view->overview, path, TRUE);
 354       gtk_tree_path_free (path);
 355     }
 356
 357   if (view->max_width < tw)
 358     view->max_width = tw;
 359   view->y += th;
 360
 361   gtk_layout_set_size (view->output, view->max_width, view->y);
 362
 363 done:
 364   cairo_destroy (cr);
 365 }
 366
 367 static void
 368 on_row_activate (GtkTreeView *overview,
 369                  GtkTreePath *path,
 370                  GtkTreeViewColumn *column,
 371                  struct psppire_output_view *view)
 372 {
 373   GtkTreeModel *model;
 374   GtkTreeIter iter;
 375   GtkAdjustment *vadj;
 376   GValue value = {0};
 377   double y, min, max;
 378
 379   model = gtk_tree_view_get_model (overview);
 380   if (!gtk_tree_model_get_iter (model, &iter, path))
 381     return;
 382
 383   gtk_tree_model_get_value (model, &iter, COL_Y, &value);
 384   y = g_value_get_long (&value);
 385   g_value_unset (&value);
 386
 387   vadj = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (view->output));
 388   min = gtk_adjustment_get_lower (vadj);
 389   max = gtk_adjustment_get_upper (vadj) - gtk_adjustment_get_page_size (vadj);
 390   if (y < min)
 391     y = min;
 392   else if (y > max)
 393     y = max;
 394   gtk_adjustment_set_value (vadj, y);
 395 }
 396
 397 static void
 398 on_style_updated (GtkWidget *toplevel, struct psppire_output_view *view)
 399 {
 400   if (!view->n_items || !gtk_widget_get_window (GTK_WIDGET (view->output)))
 401     return;
 402   string_map_clear (&view->render_opts);
 403   xr_driver_destroy (view->xr);
 404   create_xr (view);
 405   rerender (view);
 406 }
 407
 408 enum {
 409   SELECT_FMT_NULL,
 410   SELECT_FMT_TEXT,
 411   SELECT_FMT_UTF8,
 412   SELECT_FMT_HTML,
 413   SELECT_FMT_ODT
 414 };
 415
 416 /* GNU Hurd doesn't have PATH_MAX.  Use a fallback.
 417    Temporary directory names are usually not that long.  */
 418 #ifndef PATH_MAX
 419 # define PATH_MAX 1024
 420 #endif
 421
 422 static void
 423 clipboard_get_cb (GtkClipboard     *clipboard,
 424                   GtkSelectionData *selection_data,
 425                   guint             info,
 426                   gpointer          data)
 427 {
 428   struct psppire_output_view *view = data;
 429
 430   gsize length;
 431   gchar *text = NULL;
 432   struct output_driver *driver = NULL;
 433   char dirname[PATH_MAX], *filename;
 434   struct string_map options;
 435
 436   GtkTreeSelection *sel = gtk_tree_view_get_selection (view->overview);
 437   GtkTreeModel *model = gtk_tree_view_get_model (view->overview);
 438
 439   GList *rows = gtk_tree_selection_get_selected_rows (sel, &model);
 440   GList *n = rows;
 441
 442   if ( n == NULL)
 443     return;
 444
 445   if (path_search (dirname, sizeof dirname, NULL, NULL, true)
 446       || mkdtemp (dirname) == NULL)
 447     {
 448       msg_error (errno, _("failed to create temporary directory during clipboard operation"));
 449       return;
 450     }
 451   filename = xasprintf ("%s/clip.tmp", dirname);
 452
 453   string_map_init (&options);
 454   string_map_insert (&options, "output-file", filename);
 455
 456   switch (info)
 457     {
 458     case SELECT_FMT_UTF8:
 459       string_map_insert (&options, "box", "unicode");
 460       /* fall-through */
 461
 462     case SELECT_FMT_TEXT:
 463       string_map_insert (&options, "format", "txt");
 464       break;
 465
 466     case SELECT_FMT_HTML:
 467       string_map_insert (&options, "format", "html");
 468       string_map_insert (&options, "borders", "false");
 469       string_map_insert (&options, "css", "false");
 470       break;
 471
 472     case SELECT_FMT_ODT:
 473       string_map_insert (&options, "format", "odt");
 474       break;
 475
 476     default:
 477       g_warning ("unsupported clip target\n");
 478       goto finish;
 479       break;
 480     }
 481
 482   driver = output_driver_create (&options);
 483   if (driver == NULL)
 484     goto finish;
 485
 486   while (n)
 487     {
 488       GtkTreePath *path = n->data ;
 489       GtkTreeIter iter;
 490       struct output_item *item ;
 491
 492       gtk_tree_model_get_iter (model, &iter, path);
 493       gtk_tree_model_get (model, &iter, COL_ADDR, &item, -1);
 494
 495       driver->class->submit (driver, item);
 496
 497       n = n->next;
 498     }
 499
 500   if ( driver->class->flush)
 501     driver->class->flush (driver);
 502
 503
 504   /* Some drivers (eg: the odt one) don't write anything until they
 505      are closed */
 506   output_driver_destroy (driver);
 507   driver = NULL;
 508
 509   if ( g_file_get_contents (filename, &text, &length, NULL) )
 510     {
 511       gtk_selection_data_set (selection_data, gtk_selection_data_get_target (selection_data),
 512                               8,
 513                               (const guchar *) text, length);
 514     }
 515
 516  finish:
 517
 518   if (driver != NULL)
 519     output_driver_destroy (driver);
 520
 521   g_free (text);
 522
 523   unlink (filename);
 524   free (filename);
 525   rmdir (dirname);
 526
 527   g_list_free (rows);
 528 }
 529
 530 static void
 531 clipboard_clear_cb (GtkClipboard *clipboard,
 532                     gpointer data)
 533 {
 534 }
 535
 536 static const GtkTargetEntry targets[] = {
 537
 538   { "STRING",        0, SELECT_FMT_TEXT },
 539   { "TEXT",          0, SELECT_FMT_TEXT },
 540   { "COMPOUND_TEXT", 0, SELECT_FMT_TEXT },
 541   { "text/plain",    0, SELECT_FMT_TEXT },
 542
 543   { "UTF8_STRING",   0, SELECT_FMT_UTF8 },
 544   { "text/plain;charset=utf-8", 0, SELECT_FMT_UTF8 },
 545
 546   { "text/html",     0, SELECT_FMT_HTML },
 547
 548   { "application/vnd.oasis.opendocument.text", 0, SELECT_FMT_ODT }
 549 };
 550
 551 static void
 552 on_copy (struct psppire_output_view *view)
 553 {
 554   GtkWidget *widget = GTK_WIDGET (view->overview);
 555   GtkClipboard *cb = gtk_widget_get_clipboard (widget, GDK_SELECTION_CLIPBOARD);
 556
 557   if (!gtk_clipboard_set_with_data (cb, targets, G_N_ELEMENTS (targets),
 558                                     clipboard_get_cb, clipboard_clear_cb,
 559                                     view))
 560     clipboard_clear_cb (cb, view);
 561 }
 562
 563 static void
 564 on_selection_change (GtkTreeSelection *sel, GtkAction *copy_action)
 565 {
 566   /* The Copy action is available only if there is something selected */
 567   gtk_action_set_sensitive (copy_action, gtk_tree_selection_count_selected_rows (sel) > 0);
 568 }
 569
 570 static void
 571 on_select_all (struct psppire_output_view *view)
 572 {
 573   GtkTreeSelection *sel = gtk_tree_view_get_selection (view->overview);
 574   gtk_tree_view_expand_all (view->overview);
 575   gtk_tree_selection_select_all (sel);
 576 }
 577
 578 static void
 579 on_size_allocate (GtkWidget    *widget,
 580                   GdkRectangle *allocation,
 581                   struct psppire_output_view *view)
 582 {
 583   int new_render_width = MAX (300, allocation->width);
 584
 585   if (view->render_width != new_render_width)
 586     {
 587       view->render_width = new_render_width;
 588       rerender (view);
 589     }
 590 }
 591
 592 struct psppire_output_view *
 593 psppire_output_view_new (GtkLayout *output, GtkTreeView *overview,
 594                          GtkAction *copy_action, GtkAction *select_all_action)
 595 {
 596   struct psppire_output_view *view;
 597   GtkTreeViewColumn *column;
 598   GtkCellRenderer *renderer;
 599   GtkTreeSelection *sel;
 600   GtkTreeModel *model;
 601
 602   view = xmalloc (sizeof *view);
 603   view->xr = NULL;
 604   view->font_height = 0;
 605   view->output = output;
 606   view->render_width = 0;
 607   view->max_width = 0;
 608   view->y = 0;
 609   string_map_init (&view->render_opts);
 610   view->overview = overview;
 611   memset (&view->cur_command, 0, sizeof view->cur_command);
 612   view->in_command = false;
 613   view->toplevel = gtk_widget_get_toplevel (GTK_WIDGET (output));
 614   view->items = NULL;
 615   view->n_items = view->allocated_items = 0;
 616   view->print_settings = NULL;
 617   view->print_xrd = NULL;
 618   view->print_item = 0;
 619   view->print_n_pages = 0;
 620   view->paginated = FALSE;
 621
 622   g_signal_connect (output, "style-updated", G_CALLBACK (on_style_updated), view);
 623
 624   g_signal_connect (output, "size-allocate", G_CALLBACK (on_size_allocate), view);
 625
 626   gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (output)),
 627                                GTK_STYLE_CLASS_VIEW);
 628
 629   if (overview)
 630     {
 631       model = GTK_TREE_MODEL (gtk_tree_store_new (
 632                                 N_COLS,
 633                                 G_TYPE_STRING,  /* COL_NAME */
 634                                 G_TYPE_POINTER, /* COL_ADDR */
 635                                 G_TYPE_LONG));  /* COL_Y */
 636       gtk_tree_view_set_model (overview, model);
 637       g_object_unref (model);
 638
 639       sel = gtk_tree_view_get_selection (overview);
 640       gtk_tree_selection_set_mode (sel, GTK_SELECTION_MULTIPLE);
 641       g_signal_connect (sel, "changed", G_CALLBACK (on_selection_change),
 642                         copy_action);
 643
 644       column = gtk_tree_view_column_new ();
 645       gtk_tree_view_append_column (GTK_TREE_VIEW (overview), column);
 646       renderer = gtk_cell_renderer_text_new ();
 647       gtk_tree_view_column_pack_start (column, renderer, TRUE);
 648       gtk_tree_view_column_add_attribute (column, renderer, "text", COL_NAME);
 649
 650       g_signal_connect (GTK_TREE_VIEW (overview),
 651                         "row-activated", G_CALLBACK (on_row_activate), view);
 652
 653       gtk_action_set_sensitive (copy_action, FALSE);
 654       g_signal_connect_swapped (copy_action, "activate",
 655                                 G_CALLBACK (on_copy), view);
 656       g_signal_connect_swapped (select_all_action, "activate",
 657                                 G_CALLBACK (on_select_all), view);
 658     }
 659
 660   return view;
 661 }
 662
 663 void
 664 psppire_output_view_destroy (struct psppire_output_view *view)
 665 {
 666   size_t i;
 667
 668   if (!view)
 669     return;
 670
 671   g_signal_handlers_disconnect_by_func (view->output,
 672                                         G_CALLBACK (on_style_updated), view);
 673
 674   string_map_destroy (&view->render_opts);
 675
 676   for (i = 0; i < view->n_items; i++)
 677     output_item_unref (view->items[i].item);
 678   free (view->items);
 679   view->items = NULL;
 680   view->n_items = view->allocated_items = 0;
 681
 682   if (view->print_settings != NULL)
 683     g_object_unref (view->print_settings);
 684
 685   xr_driver_destroy (view->xr);
 686
 687   free (view);
 688 }
 689
 690 void
 691 psppire_output_view_clear (struct psppire_output_view *view)
 692 {
 693   size_t i;
 694
 695   view->max_width = 0;
 696   view->y = 0;
 697
 698   for (i = 0; i < view->n_items; i++)
 699     {
 700       gtk_container_remove (GTK_CONTAINER (view->output),
 701                             view->items[i].drawing_area);
 702       output_item_unref (view->items[i].item);
 703     }
 704   free (view->items);
 705   view->items = NULL;
 706   view->n_items = view->allocated_items = 0;
 707 }
 708
 709 /* Export. */
 710
 711 void
 712 psppire_output_view_export (struct psppire_output_view *view,
 713                             struct string_map *options)
 714 {
 715   struct output_driver *driver;
 716
 717   driver = output_driver_create (options);
 718   if (driver)
 719     {
 720       size_t i;
 721
 722       for (i = 0; i < view->n_items; i++)
 723         driver->class->submit (driver, view->items[i].item);
 724       output_driver_destroy (driver);
 725     }
 726 }
 727 \f
 728 /* Print. */
 729
 730 static cairo_t *
 731 get_cairo_context_from_print_context (GtkPrintContext *context)
 732 {
 733   cairo_t *cr = gtk_print_context_get_cairo_context (context);
 734
 735   /*
 736     For all platforms except windows, gtk_print_context_get_dpi_[xy] returns 72.
 737     Windows returns 600.
 738   */
 739   double xres = gtk_print_context_get_dpi_x (context);
 740   double yres = gtk_print_context_get_dpi_y (context);
 741
 742   /* This means that the cairo context now has its dimensions in Points */
 743   cairo_scale (cr, xres / 72.0, yres / 72.0);
 744
 745   return cr;
 746 }
 747
 748
 749 static void
 750 create_xr_print_driver (GtkPrintContext *context, struct psppire_output_view *view)
 751 {
 752   struct string_map options;
 753   GtkPageSetup *page_setup;
 754   double width, height;
 755   double left_margin;
 756   double right_margin;
 757   double top_margin;
 758   double bottom_margin;
 759
 760   page_setup = gtk_print_context_get_page_setup (context);
 761   width = gtk_page_setup_get_paper_width (page_setup, GTK_UNIT_MM);
 762   height = gtk_page_setup_get_paper_height (page_setup, GTK_UNIT_MM);
 763   left_margin = gtk_page_setup_get_left_margin (page_setup, GTK_UNIT_MM);
 764   right_margin = gtk_page_setup_get_right_margin (page_setup, GTK_UNIT_MM);
 765   top_margin = gtk_page_setup_get_top_margin (page_setup, GTK_UNIT_MM);
 766   bottom_margin = gtk_page_setup_get_bottom_margin (page_setup, GTK_UNIT_MM);
 767
 768   string_map_init (&options);
 769   string_map_insert_nocopy (&options, xstrdup ("paper-size"),
 770                             c_xasprintf("%.2fx%.2fmm", width, height));
 771   string_map_insert_nocopy (&options, xstrdup ("left-margin"),
 772                             c_xasprintf ("%.2fmm", left_margin));
 773   string_map_insert_nocopy (&options, xstrdup ("right-margin"),
 774                             c_xasprintf ("%.2fmm", right_margin));
 775   string_map_insert_nocopy (&options, xstrdup ("top-margin"),
 776                             c_xasprintf ("%.2fmm", top_margin));
 777   string_map_insert_nocopy (&options, xstrdup ("bottom-margin"),
 778                             c_xasprintf ("%.2fmm", bottom_margin));
 779
 780   view->print_xrd = xr_driver_create (get_cairo_context_from_print_context (context), &options);
 781
 782   string_map_destroy (&options);
 783 }
 784
 785 static gboolean
 786 paginate (GtkPrintOperation *operation,
 787           GtkPrintContext   *context,
 788           struct psppire_output_view *view)
 789 {
 790   if (view->paginated)
 791     {
 792       /* Sometimes GTK+ emits this signal again even after pagination is
 793          complete.  Don't let that screw up printing. */
 794       return TRUE;
 795     }
 796   else if ( view->print_item < view->n_items )
 797     {
 798       xr_driver_output_item (view->print_xrd,
 799                              view->items[view->print_item++].item);
 800       while (xr_driver_need_new_page (view->print_xrd))
 801         {
 802           xr_driver_next_page (view->print_xrd, get_cairo_context_from_print_context (context));
 803           view->print_n_pages ++;
 804         }
 805       return FALSE;
 806     }
 807   else
 808     {
 809       gtk_print_operation_set_n_pages (operation, view->print_n_pages);
 810
 811       /* Re-create the driver to do the real printing. */
 812       xr_driver_destroy (view->print_xrd);
 813       create_xr_print_driver (context, view);
 814       view->print_item = 0;
 815       view->paginated = TRUE;
 816
 817       return TRUE;
 818     }
 819 }
 820
 821 static void
 822 begin_print (GtkPrintOperation *operation,
 823              GtkPrintContext   *context,
 824              struct psppire_output_view *view)
 825 {
 826   create_xr_print_driver (context, view);
 827
 828   view->print_item = 0;
 829   view->print_n_pages = 1;
 830   view->paginated = FALSE;
 831 }
 832
 833 static void
 834 end_print (GtkPrintOperation *operation,
 835            GtkPrintContext   *context,
 836            struct psppire_output_view *view)
 837 {
 838   xr_driver_destroy (view->print_xrd);
 839 }
 840
 841
 842 static void
 843 draw_page (GtkPrintOperation *operation,
 844            GtkPrintContext   *context,
 845            gint               page_number,
 846            struct psppire_output_view *view)
 847 {
 848   xr_driver_next_page (view->print_xrd, get_cairo_context_from_print_context (context));
 849   while (!xr_driver_need_new_page (view->print_xrd)
 850          && view->print_item < view->n_items)
 851     xr_driver_output_item (view->print_xrd, view->items [view->print_item++].item);
 852 }
 853
 854
 855 void
 856 psppire_output_view_print (struct psppire_output_view *view,
 857                            GtkWindow *parent_window)
 858 {
 859   GtkPrintOperationResult res;
 860
 861   GtkPrintOperation *print = gtk_print_operation_new ();
 862
 863   if (view->print_settings != NULL)
 864     gtk_print_operation_set_print_settings (print, view->print_settings);
 865
 866   g_signal_connect (print, "begin_print", G_CALLBACK (begin_print), view);
 867   g_signal_connect (print, "end_print",   G_CALLBACK (end_print),   view);
 868   g_signal_connect (print, "paginate",    G_CALLBACK (paginate),    view);
 869   g_signal_connect (print, "draw_page",   G_CALLBACK (draw_page),   view);
 870
 871   res = gtk_print_operation_run (print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,
 872                                  parent_window, NULL);
 873
 874   if (res == GTK_PRINT_OPERATION_RESULT_APPLY)
 875     {
 876       if (view->print_settings != NULL)
 877         g_object_unref (view->print_settings);
 878       view->print_settings = g_object_ref (gtk_print_operation_get_print_settings (print));
 879     }
 880
 881   g_object_unref (print);
 882 }
 883 \f
 884 struct psppire_output_view_driver
 885   {
 886     struct output_driver driver;
 887     struct psppire_output_view *view;
 888   };
 889
 890 static struct psppire_output_view_driver *
 891 psppire_output_view_driver_cast (struct output_driver *driver)
 892 {
 893   return UP_CAST (driver, struct psppire_output_view_driver, driver);
 894 }
 895
 896 static void
 897 psppire_output_view_submit (struct output_driver *this,
 898                             const struct output_item *item)
 899 {
 900   struct psppire_output_view_driver *povd = psppire_output_view_driver_cast (this);
 901
 902   if (is_table_item (item))
 903     psppire_output_view_put (povd->view, item);
 904 }
 905
 906 static struct output_driver_class psppire_output_view_driver_class =
 907   {
 908     "PSPPIRE Output View",      /* name */
 909     NULL,                       /* destroy */
 910     psppire_output_view_submit, /* submit */
 911     NULL,                       /* flush */
 912   };
 913
 914 void
 915 psppire_output_view_register_driver (struct psppire_output_view *view)
 916 {
 917   struct psppire_output_view_driver *povd;
 918   struct output_driver *d;
 919
 920   povd = xzalloc (sizeof *povd);
 921   povd->view = view;
 922   d = &povd->driver;
 923   output_driver_init (d, &psppire_output_view_driver_class, "PSPPIRE Output View",
 924                       SETTINGS_DEVICE_UNFILTERED);
 925   output_driver_register (d);
 926 }