git.sur5r.net Git - glabels/blob - src/label-barcode.c

   1 /*
   2  *  label-barcode.c
   3  *  Copyright (C) 2001-2009  Jim Evins <evins@snaught.com>.
   4  *
   5  *  This file is part of gLabels.
   6  *
   7  *  gLabels is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation, either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  gLabels is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22
  23 #include "label-barcode.h"
  24
  25 #include <glib.h>
  26 #include <glib/gi18n.h>
  27 #include <pango/pangocairo.h>
  28
  29 #include "debug.h"
  30
  31
  32 /*========================================================*/
  33 /* Private macros and constants.                          */
  34 /*========================================================*/
  35
  36 #define FONT_SCALE (72.0/96.0)
  37
  38
  39 /*========================================================*/
  40 /* Private types.                                         */
  41 /*========================================================*/
  42
  43 struct _glLabelBarcodePrivate {
  44         glTextNode     *text_node;
  45         gchar          *id;
  46         glColorNode    *color_node;
  47         gboolean        text_flag;
  48         gboolean        checksum_flag;
  49         guint           format_digits;
  50 };
  51
  52
  53 /*========================================================*/
  54 /* Private globals.                                       */
  55 /*========================================================*/
  56
  57
  58 /*========================================================*/
  59 /* Private function prototypes.                           */
  60 /*========================================================*/
  61
  62 static void  gl_label_barcode_finalize      (GObject             *object);
  63
  64 static void  copy                           (glLabelObject       *dst_object,
  65                                              glLabelObject       *src_object);
  66
  67 static void  get_size                       (glLabelObject       *object,
  68                                              gdouble             *w,
  69                                              gdouble             *h);
  70
  71 static void  set_line_color                 (glLabelObject       *object,
  72                                              glColorNode         *line_color,
  73                                              gboolean             checkpoint);
  74
  75 static glColorNode *get_line_color          (glLabelObject       *object);
  76
  77 static void     draw_object                 (glLabelObject       *object,
  78                                              cairo_t             *cr,
  79                                              gboolean             screen_flag,
  80                                              glMergeRecord       *record);
  81
  82 static gboolean object_at                   (glLabelObject       *object,
  83                                              cairo_t             *cr,
  84                                              gdouble              x_pixels,
  85                                              gdouble              y_pixels);
  86
  87
  88 /*****************************************************************************/
  89 /* Boilerplate object stuff.                                                 */
  90 /*****************************************************************************/
  91 G_DEFINE_TYPE (glLabelBarcode, gl_label_barcode, GL_TYPE_LABEL_OBJECT);
  92
  93
  94 static void
  95 gl_label_barcode_class_init (glLabelBarcodeClass *class)
  96 {
  97         GObjectClass       *object_class       = G_OBJECT_CLASS (class);
  98         glLabelObjectClass *label_object_class = GL_LABEL_OBJECT_CLASS (class);
  99
 100         gl_label_barcode_parent_class = g_type_class_peek_parent (class);
 101
 102         label_object_class->copy           = copy;
 103         label_object_class->get_size       = get_size;
 104         label_object_class->set_line_color = set_line_color;
 105         label_object_class->get_line_color = get_line_color;
 106         label_object_class->draw_object    = draw_object;
 107         label_object_class->draw_shadow    = NULL;
 108         label_object_class->object_at      = object_at;
 109
 110         object_class->finalize = gl_label_barcode_finalize;
 111 }
 112
 113
 114 static void
 115 gl_label_barcode_init (glLabelBarcode *lbc)
 116 {
 117         lbc->priv = g_new0 (glLabelBarcodePrivate, 1);
 118         lbc->priv->text_node  = gl_text_node_new_from_text ("");
 119 }
 120
 121
 122 static void
 123 gl_label_barcode_finalize (GObject *object)
 124 {
 125         glLabelBarcode *lbc = GL_LABEL_BARCODE (object);
 126
 127         g_return_if_fail (object && GL_IS_LABEL_BARCODE (object));
 128
 129         gl_text_node_free (&lbc->priv->text_node);
 130         g_free (lbc->priv->id);
 131         gl_color_node_free (&(lbc->priv->color_node));
 132         g_free (lbc->priv);
 133
 134         G_OBJECT_CLASS (gl_label_barcode_parent_class)->finalize (object);
 135 }
 136
 137
 138 /*****************************************************************************/
 139 /* NEW label "barcode" object.                                               */
 140 /*****************************************************************************/
 141 GObject *
 142 gl_label_barcode_new (glLabel *label,
 143                       gboolean checkpoint)
 144 {
 145         glLabelBarcode      *lbc;
 146         glColorNode         *line_color_node;
 147
 148         lbc = g_object_new (gl_label_barcode_get_type(), NULL);
 149
 150         if (label != NULL)
 151         {
 152                 if ( checkpoint )
 153                 {
 154                         gl_label_checkpoint (label, _("Create barcode object"));
 155                 }
 156
 157                 line_color_node = gl_color_node_new_default ();
 158
 159                 line_color_node->color = gl_label_get_default_line_color(label);
 160
 161                 lbc->priv->color_node = line_color_node;
 162
 163                 gl_label_add_object (label, GL_LABEL_OBJECT (lbc));
 164                 gl_label_object_set_parent (GL_LABEL_OBJECT (lbc), label);
 165         }
 166
 167         return G_OBJECT (lbc);
 168 }
 169
 170
 171 /*****************************************************************************/
 172 /* Copy object contents.                                                     */
 173 /*****************************************************************************/
 174 static void
 175 copy (glLabelObject *dst_object,
 176       glLabelObject *src_object)
 177 {
 178         glLabelBarcode      *lbc     = (glLabelBarcode *)src_object;
 179         glLabelBarcode      *new_lbc = (glLabelBarcode *)dst_object;
 180         glTextNode          *text_node;
 181         gchar               *id;
 182         gboolean             text_flag;
 183         gboolean             checksum_flag;
 184         glColorNode         *color_node;
 185         guint                format_digits;
 186
 187         gl_debug (DEBUG_LABEL, "START");
 188
 189         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 190         g_return_if_fail (new_lbc && GL_IS_LABEL_BARCODE (new_lbc));
 191
 192         text_node = gl_label_barcode_get_data (lbc);
 193         gl_label_barcode_get_props (lbc, &id, &text_flag, &checksum_flag, &format_digits);
 194         color_node = get_line_color (src_object);
 195
 196         gl_label_barcode_set_data (new_lbc, text_node, FALSE);
 197         gl_label_barcode_set_props (new_lbc, id, text_flag, checksum_flag, format_digits, FALSE);
 198         set_line_color (dst_object, color_node, FALSE);
 199
 200         gl_color_node_free (&color_node);
 201         gl_text_node_free (&text_node);
 202         g_free (id);
 203
 204         gl_debug (DEBUG_LABEL, "END");
 205 }
 206
 207
 208 /*****************************************************************************/
 209 /* Set object params.                                                        */
 210 /*****************************************************************************/
 211 void
 212 gl_label_barcode_set_data (glLabelBarcode *lbc,
 213                            glTextNode     *text_node,
 214                            gboolean        checkpoint)
 215 {
 216         glLabel *label;
 217
 218         gl_debug (DEBUG_LABEL, "START");
 219
 220         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 221
 222         if (!gl_text_node_equal (lbc->priv->text_node, text_node))
 223         {
 224                 if ( checkpoint )
 225                 {
 226                         label = gl_label_object_get_parent (GL_LABEL_OBJECT (lbc));
 227                         gl_label_checkpoint (label, _("Barcode data"));
 228                 }
 229
 230                 gl_text_node_free (&lbc->priv->text_node);
 231                 lbc->priv->text_node = gl_text_node_dup (text_node);
 232
 233                 gl_label_object_emit_changed (GL_LABEL_OBJECT(lbc));
 234         }
 235
 236         gl_debug (DEBUG_LABEL, "END");
 237 }
 238
 239
 240 void
 241 gl_label_barcode_set_props (glLabelBarcode *lbc,
 242                             gchar          *id,
 243                             gboolean        text_flag,
 244                             gboolean        checksum_flag,
 245                             guint           format_digits,
 246                             gboolean        checkpoint)
 247 {
 248         glLabel *label;
 249
 250         gl_debug (DEBUG_LABEL, "START");
 251
 252         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 253
 254         if ( ((lbc->priv->id == NULL) && (id != NULL))
 255              || ((lbc->priv->id != NULL) && (id != NULL) && (g_ascii_strcasecmp (lbc->priv->id, id) != 0))
 256              || (lbc->priv->text_flag != text_flag)
 257              || (lbc->priv->checksum_flag != checksum_flag)
 258              || (lbc->priv->format_digits != format_digits))
 259         {
 260                 if ( checkpoint )
 261                 {
 262                         label = gl_label_object_get_parent (GL_LABEL_OBJECT (lbc));
 263                         gl_label_checkpoint (label, _("Barcode property"));
 264                 }
 265
 266                 lbc->priv->id               = g_strdup (id);
 267                 lbc->priv->text_flag        = text_flag;
 268                 lbc->priv->checksum_flag    = checksum_flag;
 269                 lbc->priv->format_digits    = format_digits;
 270
 271                 gl_label_object_emit_changed (GL_LABEL_OBJECT(lbc));
 272         }
 273
 274         gl_debug (DEBUG_LABEL, "END");
 275 }
 276
 277
 278 /*****************************************************************************/
 279 /* Get object params.                                                        */
 280 /*****************************************************************************/
 281 glTextNode *
 282 gl_label_barcode_get_data (glLabelBarcode *lbc)
 283 {
 284         g_return_val_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc), NULL);
 285
 286         return gl_text_node_dup (lbc->priv->text_node);
 287 }
 288
 289
 290 void
 291 gl_label_barcode_get_props (glLabelBarcode *lbc,
 292                             gchar          **id,
 293                             gboolean       *text_flag,
 294                             gboolean       *checksum_flag,
 295                             guint          *format_digits)
 296 {
 297         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 298
 299         *id               = g_strdup (lbc->priv->id);
 300         *text_flag        = lbc->priv->text_flag;
 301         *checksum_flag    = lbc->priv->checksum_flag;
 302         *format_digits    = lbc->priv->format_digits;
 303 }
 304
 305
 306 /*---------------------------------------------------------------------------*/
 307 /* PRIVATE.  Get object size method.                                         */
 308 /*---------------------------------------------------------------------------*/
 309 static void
 310 get_size (glLabelObject *object,
 311           gdouble       *w,
 312           gdouble       *h)
 313 {
 314         glLabelBarcode      *lbc = (glLabelBarcode *)object;
 315         gchar               *data;
 316         gdouble              w_parent, h_parent;
 317         glBarcode           *gbc;
 318
 319         gl_debug (DEBUG_LABEL, "START");
 320
 321         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 322
 323         gl_label_object_get_raw_size (object, &w_parent, &h_parent);
 324
 325         if (lbc->priv->text_node->field_flag) {
 326                 data = gl_barcode_default_digits (lbc->priv->id,
 327                                                   lbc->priv->format_digits);
 328         } else {
 329                 data = gl_text_node_expand (lbc->priv->text_node, NULL);
 330         }
 331
 332         gbc = gl_barcode_new (lbc->priv->id,
 333                               lbc->priv->text_flag,
 334                               lbc->priv->checksum_flag,
 335                               w_parent,
 336                               h_parent,
 337                               data);
 338         g_free (data);
 339
 340         if ( gbc == NULL ) {
 341                 /* Try again with default digits. */
 342                 data = gl_barcode_default_digits (lbc->priv->id,
 343                                                   lbc->priv->format_digits);
 344                 gbc = gl_barcode_new (lbc->priv->id,
 345                                       lbc->priv->text_flag,
 346                                       lbc->priv->checksum_flag,
 347                                       w_parent,
 348                                       h_parent,
 349                                       data);
 350                 g_free (data);
 351         }
 352
 353         if ( gbc != NULL )
 354         {
 355                 *w = gbc->width;
 356                 *h = gbc->height;
 357         }
 358         else
 359         {
 360                 /* If we still can't render, just set a default size. */
 361                 *w = 144;
 362                 *h = 72;
 363         }
 364
 365         gl_barcode_free (&gbc);
 366
 367         gl_debug (DEBUG_LABEL, "END");
 368 }
 369
 370
 371 /*---------------------------------------------------------------------------*/
 372 /* PRIVATE.  Set line color method.                                          */
 373 /*---------------------------------------------------------------------------*/
 374 static void
 375 set_line_color (glLabelObject *object,
 376                 glColorNode   *line_color_node,
 377                 gboolean       checkpoint)
 378 {
 379         glLabelBarcode *lbarcode = (glLabelBarcode *)object;
 380         glLabel        *label;
 381
 382         g_return_if_fail (lbarcode && GL_IS_LABEL_BARCODE (lbarcode));
 383
 384         if ( !gl_color_node_equal(lbarcode->priv->color_node, line_color_node) )
 385         {
 386                 if ( checkpoint )
 387                 {
 388                         label = gl_label_object_get_parent (GL_LABEL_OBJECT (lbarcode));
 389                         gl_label_checkpoint (label, _("Barcode data"));
 390                 }
 391
 392                 gl_color_node_free (&(lbarcode->priv->color_node));
 393                 lbarcode->priv->color_node = gl_color_node_dup (line_color_node);
 394                 gl_label_object_emit_changed (GL_LABEL_OBJECT(lbarcode));
 395         }
 396 }
 397
 398
 399 /*---------------------------------------------------------------------------*/
 400 /* PRIVATE.  Get line color method.                                          */
 401 /*---------------------------------------------------------------------------*/
 402 static glColorNode*
 403 get_line_color (glLabelObject *object)
 404 {
 405         glLabelBarcode *lbarcode = (glLabelBarcode *)object;
 406
 407         g_return_val_if_fail (lbarcode && GL_IS_LABEL_BARCODE (lbarcode), NULL);
 408
 409         return gl_color_node_dup (lbarcode->priv->color_node);
 410 }
 411
 412
 413 /*****************************************************************************/
 414 /* Draw object method.                                                       */
 415 /*****************************************************************************/
 416 static void
 417 draw_object (glLabelObject *object,
 418              cairo_t       *cr,
 419              gboolean       screen_flag,
 420              glMergeRecord *record)
 421 {
 422         gdouble               x0, y0;
 423         cairo_matrix_t        matrix;
 424         glBarcode            *gbc;
 425         glBarcodeShape       *shape;
 426         glBarcodeShapeLine   *line;
 427         glBarcodeShapeAlpha  *bchar;
 428         GList                *p;
 429         gdouble               y_offset;
 430         PangoLayout          *layout;
 431         PangoFontDescription *desc;
 432         gchar                *text, *cstring;
 433         glTextNode           *text_node;
 434         gchar                *id;
 435         gboolean              text_flag;
 436         gboolean              checksum_flag;
 437         guint                 color;
 438         glColorNode          *color_node;
 439         guint                 format_digits;
 440         gdouble               w, h;
 441
 442         gl_debug (DEBUG_LABEL, "START");
 443
 444         gl_label_object_get_position (object, &x0, &y0);
 445         gl_label_object_get_matrix (object, &matrix);
 446
 447         text_node = gl_label_barcode_get_data (GL_LABEL_BARCODE (object));
 448         gl_label_barcode_get_props (GL_LABEL_BARCODE (object),
 449                                     &id, &text_flag, &checksum_flag, &format_digits);
 450
 451         color_node = gl_label_object_get_line_color (object);
 452         color = gl_color_node_expand (color_node, record);
 453         if (color_node->field_flag && screen_flag)
 454         {
 455                 color = GL_COLOR_MERGE_DEFAULT;
 456         }
 457         gl_color_node_free (&color_node);
 458
 459         gl_label_object_get_size (object, &w, &h);
 460
 461         text_node = gl_label_barcode_get_data(GL_LABEL_BARCODE(object));
 462         text = gl_text_node_expand (text_node, record);
 463         if (text_node->field_flag && screen_flag) {
 464                 text = gl_barcode_default_digits (id, format_digits);
 465         }
 466
 467         gbc = gl_barcode_new (id, text_flag, checksum_flag, w, h, text);
 468
 469         cairo_set_source_rgba (cr, GL_COLOR_RGBA_ARGS (color));
 470
 471         if (gbc == NULL) {
 472
 473                 layout = pango_cairo_create_layout (cr);
 474
 475                 desc = pango_font_description_new ();
 476                 pango_font_description_set_family (desc, GL_BARCODE_FONT_FAMILY);
 477                 pango_font_description_set_size   (desc, 12 * PANGO_SCALE * FONT_SCALE);
 478                 pango_layout_set_font_description (layout, desc);
 479                 pango_font_description_free       (desc);
 480
 481                 if (text == NULL || *text == '\0')
 482                 {
 483                         pango_layout_set_text (layout, _("Barcode data empty"), -1);
 484                 }
 485                 else
 486                 {
 487                         pango_layout_set_text (layout, _("Invalid barcode data"), -1);
 488                 }
 489
 490                 cairo_move_to (cr, 0, 0);
 491                 pango_cairo_show_layout (cr, layout);
 492
 493                 g_object_unref (layout);
 494
 495         } else {
 496
 497                 for (p = gbc->shapes; p != NULL; p = p->next) {
 498                         shape = (glBarcodeShape *)p->data;
 499                         switch (shape->type)
 500                         {
 501
 502                         case GL_BARCODE_SHAPE_LINE:
 503                                 line = (glBarcodeShapeLine *) shape;
 504
 505                                 cairo_move_to (cr, line->x, line->y);
 506                                 cairo_line_to (cr, line->x, line->y + line->length);
 507                                 cairo_set_line_width (cr, line->width);
 508                                 cairo_stroke (cr);
 509
 510                                 break;
 511
 512                         case GL_BARCODE_SHAPE_ALPHA:
 513                                 bchar = (glBarcodeShapeAlpha *) shape;
 514
 515                                 layout = pango_cairo_create_layout (cr);
 516
 517                                 desc = pango_font_description_new ();
 518                                 pango_font_description_set_family (desc, GL_BARCODE_FONT_FAMILY);
 519                                 pango_font_description_set_size   (desc, bchar->fsize * PANGO_SCALE * FONT_SCALE);
 520                                 pango_layout_set_font_description (layout, desc);
 521                                 pango_font_description_free       (desc);
 522
 523                                 cstring = g_strdup_printf ("%c", bchar->c);
 524                                 pango_layout_set_text (layout, cstring, -1);
 525                                 g_free (cstring);
 526
 527                                 y_offset = 0.2 * bchar->fsize;
 528
 529                                 cairo_move_to (cr, bchar->x, bchar->y-y_offset);
 530                                 pango_cairo_show_layout (cr, layout);
 531
 532                                 g_object_unref (layout);
 533
 534                                 break;
 535
 536                         default:
 537                                 g_assert_not_reached ();
 538                                 break;
 539
 540                         }
 541
 542                 }
 543
 544                 gl_barcode_free (&gbc);
 545
 546         }
 547
 548         g_free (text);
 549         gl_text_node_free (&text_node);
 550         g_free (id);
 551
 552         gl_debug (DEBUG_LABEL, "END");
 553 }
 554
 555
 556 /*****************************************************************************/
 557 /* Is object at coordinates?                                                 */
 558 /*****************************************************************************/
 559 static gboolean
 560 object_at (glLabelObject *object,
 561            cairo_t       *cr,
 562            gdouble        x,
 563            gdouble        y)
 564 {
 565         gdouble           w, h;
 566
 567         gl_label_object_get_size (object, &w, &h);
 568
 569         cairo_new_path (cr);
 570         cairo_rectangle (cr, 0.0, 0.0, w, h);
 571
 572         if (cairo_in_fill (cr, x, y))
 573         {
 574                 return TRUE;
 575         }
 576
 577         return FALSE;
 578 }
 579
 580
 581
 582
 583 /*
 584  * Local Variables:       -- emacs
 585  * mode: C                -- emacs
 586  * c-basic-offset: 8      -- emacs
 587  * tab-width: 8           -- emacs
 588  * indent-tabs-mode: nil  -- emacs
 589  * End:                   -- emacs
 590  */