src/flood-context.cpp

   1 #define __SP_FLOOD_CONTEXT_C__
   2
   3 /** \file
   4 * Bucket fill drawing context, works by bitmap filling an area on a rendered version of the current display and then tracing the result using potrace.
   5 *
   6 * Author:
   7 *   Lauris Kaplinski <lauris@kaplinski.com>
   8 *   bulia byak <buliabyak@users.sf.net>
   9 *   John Bintz <jcoswell@coswellproductions.org>
  10 *
  11 * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
  12 * Copyright (C) 2000-2005 authors
  13 * Copyright (C) 2000-2001 Ximian, Inc.
  14 *
  15 * Released under GNU GPL, read the file 'COPYING' for more information
  16 */
  17
  18 #include "config.h"
  19
  20 #include <gdk/gdkkeysyms.h>
  21 #include <queue>
  22 #include <deque>
  23
  24 #include "macros.h"
  25 #include "display/sp-canvas.h"
  26 #include "document.h"
  27 #include "sp-namedview.h"
  28 #include "sp-object.h"
  29 #include "sp-rect.h"
  30 #include "selection.h"
  31 #include "desktop-handles.h"
  32 #include "desktop.h"
  33 #include "desktop-style.h"
  34 #include "message-stack.h"
  35 #include "message-context.h"
  36 #include "pixmaps/cursor-paintbucket.xpm"
  37 #include "flood-context.h"
  38 #include "sp-metrics.h"
  39 #include <glibmm/i18n.h>
  40 #include "object-edit.h"
  41 #include "xml/repr.h"
  42 #include "xml/node-event-vector.h"
  43 #include "prefs-utils.h"
  44 #include "context-fns.h"
  45 #include "rubberband.h"
  46
  47 #include "display/nr-arena-item.h"
  48 #include "display/nr-arena.h"
  49 #include "display/nr-arena-image.h"
  50 #include "display/canvas-arena.h"
  51 #include "libnr/nr-pixops.h"
  52 #include "libnr/nr-matrix-translate-ops.h"
  53 #include "libnr/nr-scale-ops.h"
  54 #include "libnr/nr-scale-translate-ops.h"
  55 #include "libnr/nr-translate-matrix-ops.h"
  56 #include "libnr/nr-translate-scale-ops.h"
  57 #include "libnr/nr-matrix-ops.h"
  58 #include "sp-item.h"
  59 #include "sp-root.h"
  60 #include "sp-defs.h"
  61 #include "sp-path.h"
  62 #include "splivarot.h"
  63 #include "livarot/Path.h"
  64 #include "livarot/Shape.h"
  65 #include "libnr/n-art-bpath.h"
  66 #include "svg/svg.h"
  67 #include "color.h"
  68
  69 #include "trace/trace.h"
  70 #include "trace/potrace/inkscape-potrace.h"
  71
  72 static void sp_flood_context_class_init(SPFloodContextClass *klass);
  73 static void sp_flood_context_init(SPFloodContext *flood_context);
  74 static void sp_flood_context_dispose(GObject *object);
  75
  76 static void sp_flood_context_setup(SPEventContext *ec);
  77
  78 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  79 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  80
  81 static void sp_flood_finish(SPFloodContext *rc);
  82
  83 static SPEventContextClass *parent_class;
  84
  85
  86 GtkType sp_flood_context_get_type()
  87 {
  88     static GType type = 0;
  89     if (!type) {
  90         GTypeInfo info = {
  91             sizeof(SPFloodContextClass),
  92             NULL, NULL,
  93             (GClassInitFunc) sp_flood_context_class_init,
  94             NULL, NULL,
  95             sizeof(SPFloodContext),
  96             4,
  97             (GInstanceInitFunc) sp_flood_context_init,
  98             NULL,    /* value_table */
  99         };
 100         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPFloodContext", &info, (GTypeFlags) 0);
 101     }
 102     return type;
 103 }
 104
 105 static void sp_flood_context_class_init(SPFloodContextClass *klass)
 106 {
 107     GObjectClass *object_class = (GObjectClass *) klass;
 108     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 109
 110     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
 111
 112     object_class->dispose = sp_flood_context_dispose;
 113
 114     event_context_class->setup = sp_flood_context_setup;
 115     event_context_class->root_handler  = sp_flood_context_root_handler;
 116     event_context_class->item_handler  = sp_flood_context_item_handler;
 117 }
 118
 119 static void sp_flood_context_init(SPFloodContext *flood_context)
 120 {
 121     SPEventContext *event_context = SP_EVENT_CONTEXT(flood_context);
 122
 123     event_context->cursor_shape = cursor_paintbucket_xpm;
 124     event_context->hot_x = 11;
 125     event_context->hot_y = 30;
 126     event_context->xp = 0;
 127     event_context->yp = 0;
 128     event_context->tolerance = 4;
 129     event_context->within_tolerance = false;
 130     event_context->item_to_select = NULL;
 131
 132     event_context->shape_repr = NULL;
 133     event_context->shape_knot_holder = NULL;
 134
 135     flood_context->item = NULL;
 136
 137     new (&flood_context->sel_changed_connection) sigc::connection();
 138 }
 139
 140 static void sp_flood_context_dispose(GObject *object)
 141 {
 142     SPFloodContext *rc = SP_FLOOD_CONTEXT(object);
 143     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 144
 145     rc->sel_changed_connection.disconnect();
 146     rc->sel_changed_connection.~connection();
 147
 148     /* fixme: This is necessary because we do not grab */
 149     if (rc->item) {
 150         sp_flood_finish(rc);
 151     }
 152
 153     if (ec->shape_repr) { // remove old listener
 154         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 155         Inkscape::GC::release(ec->shape_repr);
 156         ec->shape_repr = 0;
 157     }
 158
 159     if (rc->_message_context) {
 160         delete rc->_message_context;
 161     }
 162
 163     G_OBJECT_CLASS(parent_class)->dispose(object);
 164 }
 165
 166 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 167     NULL, /* child_added */
 168     NULL, /* child_removed */
 169     ec_shape_event_attr_changed,
 170     NULL, /* content_changed */
 171     NULL  /* order_changed */
 172 };
 173
 174 /**
 175 \brief  Callback that processes the "changed" signal on the selection;
 176 destroys old and creates new knotholder
 177 */
 178 void sp_flood_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 179 {
 180     SPFloodContext *rc = SP_FLOOD_CONTEXT(data);
 181     SPEventContext *ec = SP_EVENT_CONTEXT(rc);
 182
 183     if (ec->shape_repr) { // remove old listener
 184         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 185         Inkscape::GC::release(ec->shape_repr);
 186         ec->shape_repr = 0;
 187     }
 188
 189     SPItem *item = selection->singleItem();
 190     if (item) {
 191         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 192         if (shape_repr) {
 193             ec->shape_repr = shape_repr;
 194             Inkscape::GC::anchor(shape_repr);
 195             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 196         }
 197     }
 198 }
 199
 200 static void sp_flood_context_setup(SPEventContext *ec)
 201 {
 202     SPFloodContext *rc = SP_FLOOD_CONTEXT(ec);
 203
 204     if (((SPEventContextClass *) parent_class)->setup) {
 205         ((SPEventContextClass *) parent_class)->setup(ec);
 206     }
 207
 208     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 209     if (item) {
 210         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 211         if (shape_repr) {
 212             ec->shape_repr = shape_repr;
 213             Inkscape::GC::anchor(shape_repr);
 214             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 215         }
 216     }
 217
 218     rc->sel_changed_connection.disconnect();
 219     rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 220         sigc::bind(sigc::ptr_fun(&sp_flood_context_selection_changed), (gpointer)rc)
 221     );
 222
 223     rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 224
 225     if (prefs_get_int_attribute("tools.paintbucket", "selcue", 0) != 0) {
 226         rc->enableSelectionCue();
 227     }
 228 }
 229
 230 /**
 231  * \brief Merge a pixel with the background color.
 232  * \param orig The pixel to merge with the background.
 233  * \param bg The background color.
 234  * \param base The pixel to merge the original and background into.
 235  */
 236 inline static void
 237 merge_pixel_with_background (unsigned char *orig, unsigned char *bg,
 238            unsigned char *base)
 239 {
 240     int precalc_bg_alpha = (255 * (255 - bg[3])) / 255;
 241
 242     for (int i = 0; i < 3; i++) {
 243         base[i] = precalc_bg_alpha + (bg[i] * bg[3]) / 255;
 244         base[i] = (base[i] * (255 - orig[3])) / 255 + (orig[i] * orig[3]) / 255;
 245     }
 246 }
 247
 248 /**
 249  * \brief Get the pointer to a pixel in a pixel buffer.
 250  * \param px The pixel buffer.
 251  * \param x The X coordinate.
 252  * \param y The Y coordinate.
 253  * \param width The width of the pixel buffer.
 254  */
 255 inline unsigned char * get_pixel(guchar *px, int x, int y, int width) {
 256     return px + (x + y * width) * 4;
 257 }
 258
 259 /**
 260  * \brief Generate the list of trace channel selection entries.
 261  */
 262 GList * flood_channels_dropdown_items_list() {
 263     GList *glist = NULL;
 264
 265     glist = g_list_append (glist, _("Visible Colors"));
 266     glist = g_list_append (glist, _("Red"));
 267     glist = g_list_append (glist, _("Green"));
 268     glist = g_list_append (glist, _("Blue"));
 269     glist = g_list_append (glist, _("Hue"));
 270     glist = g_list_append (glist, _("Saturation"));
 271     glist = g_list_append (glist, _("Lightness"));
 272     glist = g_list_append (glist, _("Alpha"));
 273
 274     return glist;
 275 }
 276
 277 /**
 278  * \brief Generate the list of autogap selection entries.
 279  */
 280 GList * flood_autogap_dropdown_items_list() {
 281     GList *glist = NULL;
 282
 283     glist = g_list_append (glist, _("None"));
 284     glist = g_list_append (glist, _("Small"));
 285     glist = g_list_append (glist, _("Medium"));
 286     glist = g_list_append (glist, _("Large"));
 287
 288     return glist;
 289 }
 290
 291 /**
 292  * \brief Compare a pixel in a pixel buffer with another pixel to determine if a point should be included in the fill operation.
 293  * \param check The pixel in the pixel buffer to check.
 294  * \param orig The original selected pixel to use as the fill target color.
 295  * \param merged_orig_pixel The original pixel merged with the background.
 296  * \param dtc The desktop background color.
 297  * \param threshold The fill threshold.
 298  * \param method The fill method to use as defined in PaintBucketChannels.
 299  */
 300 static bool compare_pixels(unsigned char *check, unsigned char *orig, unsigned char *merged_orig_pixel, unsigned char *dtc, int threshold, PaintBucketChannels method) {
 301     int diff = 0;
 302     float hsl_check[3], hsl_orig[3];
 303
 304     if ((method == FLOOD_CHANNELS_H) ||
 305         (method == FLOOD_CHANNELS_S) ||
 306         (method == FLOOD_CHANNELS_L)) {
 307         sp_color_rgb_to_hsl_floatv(hsl_check, check[0] / 255.0, check[1] / 255.0, check[2] / 255.0);
 308         sp_color_rgb_to_hsl_floatv(hsl_orig, orig[0] / 255.0, orig[1] / 255.0, orig[2] / 255.0);
 309     }
 310
 311     switch (method) {
 312         case FLOOD_CHANNELS_ALPHA:
 313             return ((int)abs(check[3] - orig[3]) <= threshold);
 314         case FLOOD_CHANNELS_R:
 315             return ((int)abs(check[0] - orig[0]) <= threshold);
 316         case FLOOD_CHANNELS_G:
 317             return ((int)abs(check[1] - orig[1]) <= threshold);
 318         case FLOOD_CHANNELS_B:
 319             return ((int)abs(check[2] - orig[2]) <= threshold);
 320         case FLOOD_CHANNELS_RGB:
 321             unsigned char merged_check[3];
 322
 323             merge_pixel_with_background(check, dtc, merged_check);
 324
 325             for (int i = 0; i < 3; i++) {
 326               diff += (int)abs(merged_check[i] - merged_orig_pixel[i]);
 327             }
 328             return ((diff / 3) <= ((threshold * 3) / 4));
 329
 330         case FLOOD_CHANNELS_H:
 331             return ((int)(fabs(hsl_check[0] - hsl_orig[0]) * 100.0) <= threshold);
 332         case FLOOD_CHANNELS_S:
 333             return ((int)(fabs(hsl_check[1] - hsl_orig[1]) * 100.0) <= threshold);
 334         case FLOOD_CHANNELS_L:
 335             return ((int)(fabs(hsl_check[2] - hsl_orig[2]) * 100.0) <= threshold);
 336     }
 337
 338     return false;
 339 }
 340
 341 static inline bool is_pixel_checked(unsigned char *t) { return t[0] == 1; }
 342 static inline bool is_pixel_queued(unsigned char *t) { return t[1] == 1; }
 343 static inline bool is_pixel_paintability_checked(unsigned char *t) { return t[2] != 0; }
 344 static inline bool is_pixel_paintable(unsigned char *t) { return t[2] == 1; }
 345 static inline bool is_pixel_colored(unsigned char *t) { return t[3] == 255; }
 346
 347 static inline void mark_pixel_checked(unsigned char *t) { t[0] = 1; }
 348 static inline void mark_pixel_unchecked(unsigned char *t) { t[0] = 0; }
 349 static inline void mark_pixel_queued(unsigned char *t) { t[1] = 1; }
 350 static inline void mark_pixel_paintable(unsigned char *t) { t[2] = 1; }
 351 static inline void mark_pixel_not_paintable(unsigned char *t) { t[2] = 2; }
 352 static inline void mark_pixel_colored(unsigned char *t) { t[3] = 255; }
 353
 354 static inline void clear_pixel_paintability(unsigned char *t) { t[2] = 0; }
 355
 356 struct bitmap_coords_info {
 357     bool is_left;
 358     unsigned int x;
 359     unsigned int y;
 360     int y_limit;
 361     unsigned int width;
 362     unsigned int height;
 363     unsigned int threshold;
 364     unsigned int radius;
 365     PaintBucketChannels method;
 366     unsigned char *dtc;
 367     unsigned char *merged_orig_pixel;
 368     NR::Rect bbox;
 369     NR::Rect screen;
 370     unsigned int max_queue_size;
 371     unsigned int current_step;
 372 };
 373
 374 /**
 375  * \brief Check if a pixel can be included in the fill.
 376  * \param px The rendered pixel buffer to check.
 377  * \param trace_t The pixel in the trace pixel buffer to check or mark.
 378  * \param x The X coordinate.
 379  * \param y The y coordinate.
 380  * \param orig_color The original selected pixel to use as the fill target color.
 381  * \param bci The bitmap_coords_info structure.
 382  */
 383 inline static bool check_if_pixel_is_paintable(guchar *px, unsigned char *trace_t, int x, int y, unsigned char *orig_color, bitmap_coords_info bci) {
 384     if (is_pixel_paintability_checked(trace_t)) {
 385         return is_pixel_paintable(trace_t);
 386     } else {
 387         unsigned char *t = get_pixel(px, x, y, bci.width);
 388         if (compare_pixels(t, orig_color, bci.merged_orig_pixel, bci.dtc, bci.threshold, bci.method)) {
 389             mark_pixel_paintable(trace_t);
 390             return true;
 391         } else {
 392             mark_pixel_not_paintable(trace_t);
 393             return false;
 394         }
 395     }
 396 }
 397
 398 /**
 399  * \brief Perform the bitmap-to-vector tracing and place the traced path onto the document.
 400  * \param px The trace pixel buffer to trace to SVG.
 401  * \param desktop The desktop on which to place the final SVG path.
 402  * \param transform The transform to apply to the final SVG path.
 403  * \param union_with_selection If true, merge the final SVG path with the current selection.
 404  */
 405 static void do_trace(GdkPixbuf *px, SPDesktop *desktop, NR::Matrix transform, bool union_with_selection) {
 406     SPDocument *document = sp_desktop_document(desktop);
 407
 408     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 409
 410     pte.setTraceType(Inkscape::Trace::Potrace::TRACE_BRIGHTNESS);
 411     pte.setInvert(false);
 412
 413     Glib::RefPtr<Gdk::Pixbuf> pixbuf = Glib::wrap(px, true);
 414
 415     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.trace(pixbuf);
 416
 417     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 418     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 419
 420     long totalNodeCount = 0L;
 421
 422     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 423
 424     for (unsigned int i=0 ; i<results.size() ; i++) {
 425         Inkscape::Trace::TracingEngineResult result = results[i];
 426         totalNodeCount += result.getNodeCount();
 427
 428         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 429         /* Set style */
 430         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 431
 432         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 433         Path *path = bpath_to_Path(bpath);
 434         g_free(bpath);
 435
 436         if (offset != 0) {
 437
 438             Shape *path_shape = new Shape();
 439
 440             path->ConvertWithBackData(0.03);
 441             path->Fill(path_shape, 0);
 442             delete path;
 443
 444             Shape *expanded_path_shape = new Shape();
 445
 446             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 447             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 448             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 449
 450             Path *expanded_path = new Path();
 451
 452             expanded_path->Reset();
 453             expanded_path_shape->ConvertToForme(expanded_path);
 454             expanded_path->ConvertEvenLines(1.0);
 455             expanded_path->Simplify(1.0);
 456
 457             delete path_shape;
 458             delete expanded_path_shape;
 459
 460             gchar *str = expanded_path->svg_dump_path();
 461             if (str && *str) {
 462                 pathRepr->setAttribute("d", str);
 463                 g_free(str);
 464             } else {
 465                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 466                 Inkscape::GC::release(pathRepr);
 467                 g_free(str);
 468                 return;
 469             }
 470
 471             delete expanded_path;
 472
 473         } else {
 474             gchar *str = path->svg_dump_path();
 475             delete path;
 476             pathRepr->setAttribute("d", str);
 477             g_free(str);
 478         }
 479
 480         layer_repr->addChild(pathRepr, NULL);
 481
 482         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 483         if (reprobj) {
 484             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 485
 486             // premultiply the item transform by the accumulated parent transform in the paste layer
 487             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 488             if (!local.test_identity()) {
 489                 gchar const *t_str = pathRepr->attribute("transform");
 490                 NR::Matrix item_t (NR::identity());
 491                 if (t_str)
 492                     sp_svg_transform_read(t_str, &item_t);
 493                 item_t *= local.inverse();
 494                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 495                 gchar *affinestr=sp_svg_transform_write(item_t);
 496                 pathRepr->setAttribute("transform", affinestr);
 497                 g_free(affinestr);
 498             }
 499
 500             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 501
 502             pathRepr->setPosition(-1);
 503
 504             if (union_with_selection) {
 505                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, ngettext("Area filled, path with <b>%d</b> node created and unioned with selection.","Area filled, path with <b>%d</b> nodes created and unioned with selection.",sp_nodes_in_path(SP_PATH(reprobj))), sp_nodes_in_path(SP_PATH(reprobj)));
 506                 selection->add(reprobj);
 507                 sp_selected_path_union_skip_undo();
 508             } else {
 509                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, ngettext("Area filled, path with <b>%d</b> node created.","Area filled, path with <b>%d</b> nodes created.",sp_nodes_in_path(SP_PATH(reprobj))), sp_nodes_in_path(SP_PATH(reprobj)));
 510                 selection->set(reprobj);
 511             }
 512
 513         }
 514
 515         Inkscape::GC::release(pathRepr);
 516
 517     }
 518 }
 519
 520 /**
 521  * \brief The possible return states of perform_bitmap_scanline_check()
 522  */
 523 enum ScanlineCheckResult {
 524     SCANLINE_CHECK_OK,
 525     SCANLINE_CHECK_ABORTED,
 526     SCANLINE_CHECK_BOUNDARY
 527 };
 528
 529 /**
 530  * \brief Determine if the provided coordinates are within the pixel buffer limits.
 531  * \param x The X coordinate.
 532  * \param y The Y coordinate.
 533  * \param bci The bitmap_coords_info structure.
 534  */
 535 inline static bool coords_in_range(unsigned int x, unsigned int y, bitmap_coords_info bci) {
 536     return (x < bci.width) &&
 537            (y < bci.height);
 538 }
 539
 540 #define PAINT_DIRECTION_LEFT 1
 541 #define PAINT_DIRECTION_RIGHT 2
 542 #define PAINT_DIRECTION_UP 4
 543 #define PAINT_DIRECTION_DOWN 8
 544 #define PAINT_DIRECTION_ALL 15
 545
 546 /**
 547  * \brief Paint a pixel or a square (if autogap is enabled) on the trace pixel buffer
 548  * \param px The rendered pixel buffer to check.
 549  * \param trace_px The trace pixel buffer.
 550  * \param orig_color The original selected pixel to use as the fill target color.
 551  * \param bci The bitmap_coords_info structure.
 552  * \param original_point_trace_t The original pixel in the trace pixel buffer to check.
 553  */
 554 inline static unsigned int paint_pixel(guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci, unsigned char *original_point_trace_t) {
 555     if (bci.radius == 0) {
 556         mark_pixel_colored(original_point_trace_t);
 557         return PAINT_DIRECTION_ALL;
 558     } else {
 559         unsigned char *trace_t;
 560
 561         bool can_paint_up = true;
 562         bool can_paint_down = true;
 563         bool can_paint_left = true;
 564         bool can_paint_right = true;
 565
 566         for (unsigned int ty = bci.y - bci.radius; ty <= bci.y + bci.radius; ty++) {
 567             for (unsigned int tx = bci.x - bci.radius; tx <= bci.x + bci.radius; tx++) {
 568                 if (coords_in_range(tx, ty, bci)) {
 569                     trace_t = get_pixel(trace_px, tx, ty, bci.width);
 570                     if (!is_pixel_colored(trace_t)) {
 571                         if (check_if_pixel_is_paintable(px, trace_t, tx, ty, orig_color, bci)) {
 572                             mark_pixel_colored(trace_t);
 573                         } else {
 574                             if (tx < bci.x) { can_paint_left = false; }
 575                             if (tx > bci.x) { can_paint_right = false; }
 576                             if (ty < bci.y) { can_paint_up = false; }
 577                             if (ty > bci.y) { can_paint_down = false; }
 578                         }
 579                     }
 580                 }
 581             }
 582         }
 583
 584         unsigned int paint_directions = 0;
 585         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 586         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 587         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 588         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 589
 590         return paint_directions;
 591     }
 592 }
 593
 594 /**
 595  * \brief Push a point to be checked onto the bottom of the rendered pixel buffer check queue.
 596  * \param fill_queue The fill queue to add the point to.
 597  * \param max_queue_size The maximum size of the fill queue.
 598  * \param trace_t The trace pixel buffer pixel.
 599  * \param x The X coordinate.
 600  * \param y The Y coordinate.
 601  */
 602 static void push_point_onto_queue(std::deque<NR::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) {
 603     if (!is_pixel_queued(trace_t)) {
 604         if ((fill_queue->size() < max_queue_size)) {
 605             fill_queue->push_back(NR::Point(x, y));
 606             mark_pixel_queued(trace_t);
 607         }
 608     }
 609 }
 610
 611 /**
 612  * \brief Shift a point to be checked onto the top of the rendered pixel buffer check queue.
 613  * \param fill_queue The fill queue to add the point to.
 614  * \param max_queue_size The maximum size of the fill queue.
 615  * \param trace_t The trace pixel buffer pixel.
 616  * \param x The X coordinate.
 617  * \param y The Y coordinate.
 618  */
 619 static void shift_point_onto_queue(std::deque<NR::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) {
 620     if (!is_pixel_queued(trace_t)) {
 621         if ((fill_queue->size() < max_queue_size)) {
 622             fill_queue->push_front(NR::Point(x, y));
 623             mark_pixel_queued(trace_t);
 624         }
 625     }
 626 }
 627
 628 /**
 629  * \brief Scan a row in the rendered pixel buffer and add points to the fill queue as necessary.
 630  * \param fill_queue The fill queue to add the point to.
 631  * \param px The rendered pixel buffer.
 632  * \param trace_px The trace pixel buffer.
 633  * \param orig_color The original selected pixel to use as the fill target color.
 634  * \param bci The bitmap_coords_info structure.
 635  */
 636 static ScanlineCheckResult perform_bitmap_scanline_check(std::deque<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci) {
 637     bool aborted = false;
 638     bool reached_screen_boundary = false;
 639     bool ok;
 640
 641     bool keep_tracing;
 642     bool initial_paint = true;
 643
 644     unsigned char *current_trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 645     unsigned int paint_directions;
 646
 647     bool currently_painting_top = false;
 648     bool currently_painting_bottom = false;
 649
 650     unsigned int pix_width = bci.width * 4;
 651
 652     unsigned int top_ty = bci.y - 1;
 653     unsigned int bottom_ty = bci.y + 1;
 654
 655     bool can_paint_top = (top_ty > 0);
 656     bool can_paint_bottom = (bottom_ty < bci.height);
 657
 658     NR::Point t = fill_queue->front();
 659
 660     do {
 661         ok = false;
 662         if (bci.is_left) {
 663             keep_tracing = (bci.x != 0);
 664         } else {
 665             keep_tracing = (bci.x < bci.width);
 666         }
 667
 668         if (keep_tracing) {
 669             if (check_if_pixel_is_paintable(px, current_trace_t, bci.x, bci.y, orig_color, bci)) {
 670                 paint_directions = paint_pixel(px, trace_px, orig_color, bci, current_trace_t);
 671                 if (bci.radius == 0) {
 672                     mark_pixel_checked(current_trace_t);
 673                     if ((t[NR::X] == bci.x) && (t[NR::Y] == bci.y)) {
 674                         fill_queue->pop_front(); t = fill_queue->front();
 675                     }
 676                 }
 677
 678                 if (can_paint_top) {
 679                     if (paint_directions & PAINT_DIRECTION_UP) {
 680                         unsigned char *trace_t = current_trace_t - pix_width;
 681                         if (!is_pixel_queued(trace_t)) {
 682                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, top_ty, orig_color, bci);
 683
 684                             if (initial_paint) { currently_painting_top = !ok_to_paint; }
 685
 686                             if (ok_to_paint && (!currently_painting_top)) {
 687                                 currently_painting_top = true;
 688                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, top_ty);
 689                             }
 690                             if ((!ok_to_paint) && currently_painting_top) {
 691                                 currently_painting_top = false;
 692                             }
 693                         }
 694                     }
 695                 }
 696
 697                 if (can_paint_bottom) {
 698                     if (paint_directions & PAINT_DIRECTION_DOWN) {
 699                         unsigned char *trace_t = current_trace_t + pix_width;
 700                         if (!is_pixel_queued(trace_t)) {
 701                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, bottom_ty, orig_color, bci);
 702
 703                             if (initial_paint) { currently_painting_bottom = !ok_to_paint; }
 704
 705                             if (ok_to_paint && (!currently_painting_bottom)) {
 706                                 currently_painting_bottom = true;
 707                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, bottom_ty);
 708                             }
 709                             if ((!ok_to_paint) && currently_painting_bottom) {
 710                                 currently_painting_bottom = false;
 711                             }
 712                         }
 713                     }
 714                 }
 715
 716                 if (bci.is_left) {
 717                     if (paint_directions & PAINT_DIRECTION_LEFT) {
 718                         bci.x -= 1; current_trace_t -= 4;
 719                         ok = true;
 720                     }
 721                 } else {
 722                     if (paint_directions & PAINT_DIRECTION_RIGHT) {
 723                         bci.x += 1; current_trace_t += 4;
 724                         ok = true;
 725                     }
 726                 }
 727
 728                 initial_paint = false;
 729             }
 730         } else {
 731             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 732                 aborted = true; break;
 733             } else {
 734                 reached_screen_boundary = true;
 735             }
 736         }
 737     } while (ok);
 738
 739     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 740     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 741     return SCANLINE_CHECK_OK;
 742 }
 743
 744 /**
 745  * \brief Sort the rendered pixel buffer check queue vertically.
 746  */
 747 static bool sort_fill_queue_vertical(NR::Point a, NR::Point b) {
 748     return a[NR::Y] > b[NR::Y];
 749 }
 750
 751 /**
 752  * \brief Sort the rendered pixel buffer check queue horizontally.
 753  */
 754 static bool sort_fill_queue_horizontal(NR::Point a, NR::Point b) {
 755     return a[NR::X] > b[NR::X];
 756 }
 757
 758 /**
 759  * \brief Perform a flood fill operation.
 760  * \param event_context The event context for this tool.
 761  * \param event The details of this event.
 762  * \param union_with_selection If true, union the new fill with the current selection.
 763  * \param is_point_fill If false, use the Rubberband "touch selection" to get the initial points for the fill.
 764  * \param is_touch_fill If true, use only the initial contact point in the Rubberband "touch selection" as the fill target color.
 765  */
 766 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 767     SPDesktop *desktop = event_context->desktop;
 768     SPDocument *document = sp_desktop_document(desktop);
 769
 770     /* Create new arena */
 771     NRArena *arena = NRArena::create();
 772     unsigned dkey = sp_item_display_key_new(1);
 773
 774     sp_document_ensure_up_to_date (document);
 775
 776     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 777     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 778
 779     if (!bbox) {
 780         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 781         return;
 782     }
 783
 784     double zoom_scale = desktop->current_zoom();
 785
 786     // Render 160% of the physical display to the render pixel buffer, so that available
 787     // fill areas off the screen can be included in the fill.
 788     double padding = 1.6;
 789
 790     NR::Rect screen = desktop->get_display_area();
 791
 792     unsigned int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 793     unsigned int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 794
 795     NR::Point origin(screen.min()[NR::X],
 796                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 797
 798     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 799     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 800
 801     NR::scale scale(zoom_scale, zoom_scale);
 802     NR::Matrix affine = scale * NR::translate(-origin * scale);
 803
 804     /* Create ArenaItems and set transform */
 805     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 806     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 807
 808     NRGC gc(NULL);
 809     gc.transform.set_identity();
 810
 811     NRRectL final_bbox;
 812     final_bbox.x0 = 0;
 813     final_bbox.y0 = 0; //row;
 814     final_bbox.x1 = width;
 815     final_bbox.y1 = height; //row + num_rows;
 816
 817     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 818
 819     guchar *px = g_new(guchar, 4 * width * height);
 820
 821     NRPixBlock B;
 822     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 823                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 824                               px, 4 * width, FALSE, FALSE );
 825
 826     SPNamedView *nv = sp_desktop_namedview(desktop);
 827     unsigned long bgcolor = nv->pagecolor;
 828
 829     unsigned char dtc[4];
 830     dtc[0] = NR_RGBA32_R(bgcolor);
 831     dtc[1] = NR_RGBA32_G(bgcolor);
 832     dtc[2] = NR_RGBA32_B(bgcolor);
 833     dtc[3] = NR_RGBA32_A(bgcolor);
 834
 835     for (unsigned int fy = 0; fy < height; fy++) {
 836         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 837         for (unsigned int fx = 0; fx < width; fx++) {
 838             for (int i = 0; i < 4; i++) {
 839                 *p++ = dtc[i];
 840             }
 841         }
 842     }
 843
 844     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 845     nr_pixblock_release(&B);
 846
 847     // Hide items
 848     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 849
 850     nr_arena_item_unref(root);
 851     nr_object_unref((NRObject *) arena);
 852
 853     guchar *trace_px = g_new(guchar, 4 * width * height);
 854     memset(trace_px, 0x00, 4 * width * height);
 855
 856     std::deque<NR::Point> fill_queue;
 857     std::queue<NR::Point> color_queue;
 858
 859     std::vector<NR::Point> fill_points;
 860
 861     bool aborted = false;
 862     int y_limit = height - 1;
 863
 864     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 865     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 866
 867     switch(method) {
 868         case FLOOD_CHANNELS_ALPHA:
 869         case FLOOD_CHANNELS_RGB:
 870         case FLOOD_CHANNELS_R:
 871         case FLOOD_CHANNELS_G:
 872         case FLOOD_CHANNELS_B:
 873             threshold = (255 * threshold) / 100;
 874             break;
 875         case FLOOD_CHANNELS_H:
 876         case FLOOD_CHANNELS_S:
 877         case FLOOD_CHANNELS_L:
 878             break;
 879     }
 880
 881     bitmap_coords_info bci;
 882
 883     bci.y_limit = y_limit;
 884     bci.width = width;
 885     bci.height = height;
 886     bci.threshold = threshold;
 887     bci.method = method;
 888     bci.bbox = *bbox;
 889     bci.screen = screen;
 890     bci.dtc = dtc;
 891     bci.radius = prefs_get_int_attribute_limited("tools.paintbucket", "autogap", 0, 0, 3);
 892     bci.max_queue_size = (width * height) / 4;
 893     bci.current_step = 0;
 894
 895     if (is_point_fill) {
 896         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 897     } else {
 898         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 899         fill_points = r->getPoints();
 900     }
 901
 902     for (unsigned int i = 0; i < fill_points.size(); i++) {
 903         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 904
 905         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 906         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 907
 908         if (is_touch_fill) {
 909             if (i == 0) {
 910                 color_queue.push(pw);
 911             } else {
 912                 unsigned char *trace_t = get_pixel(trace_px, (int)pw[NR::X], (int)pw[NR::Y], width);
 913                 push_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, (int)pw[NR::X], (int)pw[NR::Y]);
 914             }
 915         } else {
 916             color_queue.push(pw);
 917         }
 918     }
 919
 920     bool reached_screen_boundary = false;
 921
 922     bool first_run = true;
 923
 924     unsigned long sort_size_threshold = 5;
 925
 926     while (!color_queue.empty() && !aborted) {
 927         NR::Point color_point = color_queue.front();
 928         color_queue.pop();
 929
 930         int cx = (int)color_point[NR::X];
 931         int cy = (int)color_point[NR::Y];
 932
 933         unsigned char *orig_px = get_pixel(px, cx, cy, width);
 934         unsigned char orig_color[4];
 935         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 936
 937         unsigned char merged_orig[3];
 938
 939         merge_pixel_with_background(orig_color, dtc, merged_orig);
 940
 941         bci.merged_orig_pixel = merged_orig;
 942
 943         unsigned char *trace_t = get_pixel(trace_px, cx, cy, width);
 944         if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) {
 945             if (check_if_pixel_is_paintable(px, trace_px, cx, cy, orig_color, bci)) {
 946                 shift_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, cx, cy);
 947
 948                 if (!first_run) {
 949                     for (unsigned int y = 0; y < height; y++) {
 950                         trace_t = get_pixel(trace_px, 0, y, width);
 951                         for (unsigned int x = 0; x < width; x++) {
 952                             clear_pixel_paintability(trace_t);
 953                             trace_t += 4;
 954                         }
 955                     }
 956                 }
 957                 first_run = false;
 958             }
 959         }
 960
 961         unsigned long old_fill_queue_size = fill_queue.size();
 962
 963         while (!fill_queue.empty() && !aborted) {
 964             NR::Point cp = fill_queue.front();
 965
 966             if (bci.radius == 0) {
 967                 unsigned long new_fill_queue_size = fill_queue.size();
 968
 969                 /*
 970                  * To reduce the number of points in the fill queue, periodically
 971                  * resort all of the points in the queue so that scanline checks
 972                  * can complete more quickly.  A point cannot be checked twice
 973                  * in a normal scanline checks, so forcing scanline checks to start
 974                  * from one corner of the rendered area as often as possible
 975                  * will reduce the number of points that need to be checked and queued.
 976                  */
 977                 if (new_fill_queue_size > sort_size_threshold) {
 978                     if (new_fill_queue_size > old_fill_queue_size) {
 979                         std::sort(fill_queue.begin(), fill_queue.end(), sort_fill_queue_vertical);
 980
 981                         std::deque<NR::Point>::iterator start_sort = fill_queue.begin();
 982                         std::deque<NR::Point>::iterator end_sort = fill_queue.begin();
 983                         unsigned int sort_y = (unsigned int)cp[NR::Y];
 984                         unsigned int current_y = sort_y;
 985
 986                         for (std::deque<NR::Point>::iterator i = fill_queue.begin(); i != fill_queue.end(); i++) {
 987                             NR::Point current = *i;
 988                             current_y = (unsigned int)current[NR::Y];
 989                             if (current_y != sort_y) {
 990                                 if (start_sort != end_sort) {
 991                                     std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
 992                                 }
 993                                 sort_y = current_y;
 994                                 start_sort = i;
 995                             }
 996                             end_sort = i;
 997                         }
 998                         if (start_sort != end_sort) {
 999                             std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
1000                         }
1001
1002                         cp = fill_queue.front();
1003                     }
1004                 }
1005
1006                 old_fill_queue_size = new_fill_queue_size;
1007             }
1008
1009             fill_queue.pop_front();
1010
1011             int x = (int)cp[NR::X];
1012             int y = (int)cp[NR::Y];
1013
1014             unsigned char *trace_t = get_pixel(trace_px, x, y, width);
1015             if (!is_pixel_checked(trace_t)) {
1016                 mark_pixel_checked(trace_t);
1017
1018                 if (y == 0) {
1019                     if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
1020                         aborted = true; break;
1021                     } else {
1022                         reached_screen_boundary = true;
1023                     }
1024                 }
1025
1026                 if (y == y_limit) {
1027                     if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
1028                         aborted = true; break;
1029                     } else {
1030                         reached_screen_boundary = true;
1031                     }
1032                 }
1033
1034                 bci.is_left = true;
1035                 bci.x = x;
1036                 bci.y = y;
1037
1038                 ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
1039
1040                 switch (result) {
1041                     case SCANLINE_CHECK_ABORTED:
1042                         aborted = true;
1043                         break;
1044                     case SCANLINE_CHECK_BOUNDARY:
1045                         reached_screen_boundary = true;
1046                         break;
1047                     default:
1048                         break;
1049                 }
1050
1051                 if (bci.x < width) {
1052                     trace_t += 4;
1053                     if (!is_pixel_checked(trace_t) && !is_pixel_queued(trace_t)) {
1054                         mark_pixel_checked(trace_t);
1055                         bci.is_left = false;
1056                         bci.x = x + 1;
1057
1058                         result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
1059
1060                         switch (result) {
1061                             case SCANLINE_CHECK_ABORTED:
1062                                 aborted = true;
1063                                 break;
1064                             case SCANLINE_CHECK_BOUNDARY:
1065                                 reached_screen_boundary = true;
1066                                 break;
1067                             default:
1068                                 break;
1069                         }
1070                     }
1071                 }
1072             }
1073
1074             bci.current_step++;
1075
1076             if (bci.current_step > bci.max_queue_size) {
1077                 aborted = true;
1078             }
1079         }
1080     }
1081
1082     g_free(px);
1083
1084     if (aborted) {
1085         g_free(trace_px);
1086         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
1087         return;
1088     }
1089
1090     if (reached_screen_boundary) {
1091         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Only the visible part of the bounded area was filled.</b> If you want to fill all of the area, undo, zoom out, and fill again."));
1092     }
1093
1094     GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(trace_px,
1095                                       GDK_COLORSPACE_RGB,
1096                                       TRUE,
1097                                       8, width, height, width * 4,
1098                                       (GdkPixbufDestroyNotify)g_free,
1099                                       NULL);
1100
1101     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
1102
1103     do_trace(pixbuf, desktop, inverted_affine, union_with_selection);
1104
1105     g_free(trace_px);
1106
1107     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
1108 }
1109
1110 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
1111 {
1112     gint ret = FALSE;
1113
1114     SPDesktop *desktop = event_context->desktop;
1115
1116     switch (event->type) {
1117     case GDK_BUTTON_PRESS:
1118         if ((event->button.state & GDK_CONTROL_MASK) && event->button.button == 1 && !event_context->space_panning) {
1119             NR::Point const button_w(event->button.x,
1120                                     event->button.y);
1121
1122             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
1123
1124             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
1125             /* Set style */
1126             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
1127             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
1128             ret = TRUE;
1129         }
1130         break;
1131     default:
1132         break;
1133     }
1134
1135     if (((SPEventContextClass *) parent_class)->item_handler) {
1136         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
1137     }
1138
1139     return ret;
1140 }
1141
1142 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
1143 {
1144     static bool dragging;
1145
1146     gint ret = FALSE;
1147     SPDesktop *desktop = event_context->desktop;
1148
1149     switch (event->type) {
1150     case GDK_BUTTON_PRESS:
1151         if (event->button.button == 1 && !event_context->space_panning) {
1152             if (!(event->button.state & GDK_CONTROL_MASK)) {
1153                 NR::Point const button_w(event->button.x,
1154                                         event->button.y);
1155
1156                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
1157                     // save drag origin
1158                     event_context->xp = (gint) button_w[NR::X];
1159                     event_context->yp = (gint) button_w[NR::Y];
1160                     event_context->within_tolerance = true;
1161
1162                     dragging = true;
1163
1164                     NR::Point const p(desktop->w2d(button_w));
1165                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
1166                     Inkscape::Rubberband::get()->start(desktop, p);
1167                 }
1168             }
1169         }
1170     case GDK_MOTION_NOTIFY:
1171         if ( dragging
1172              && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)
1173         {
1174             if ( event_context->within_tolerance
1175                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
1176                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
1177                 break; // do not drag if we're within tolerance from origin
1178             }
1179
1180             event_context->within_tolerance = false;
1181
1182             NR::Point const motion_pt(event->motion.x, event->motion.y);
1183             NR::Point const p(desktop->w2d(motion_pt));
1184             if (Inkscape::Rubberband::get()->is_started()) {
1185                 Inkscape::Rubberband::get()->move(p);
1186                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
1187                 gobble_motion_events(GDK_BUTTON1_MASK);
1188             }
1189         }
1190         break;
1191
1192     case GDK_BUTTON_RELEASE:
1193         if (event->button.button == 1 && !event_context->space_panning) {
1194             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
1195             if (r->is_started()) {
1196                 // set "busy" cursor
1197                 desktop->setWaitingCursor();
1198
1199                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1200                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
1201                     // So check if the tool is valid before doing anything
1202                     dragging = false;
1203
1204                     bool is_point_fill = event_context->within_tolerance;
1205                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
1206
1207                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
1208
1209                     desktop->clearWaitingCursor();
1210                     // restore cursor when done; note that it may already be different if e.g. user
1211                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
1212
1213                     ret = TRUE;
1214                 }
1215
1216                 r->stop();
1217
1218                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1219                     event_context->defaultMessageContext()->clear();
1220                 }
1221             }
1222         }
1223         break;
1224     case GDK_KEY_PRESS:
1225         switch (get_group0_keyval (&event->key)) {
1226         case GDK_Up:
1227         case GDK_Down:
1228         case GDK_KP_Up:
1229         case GDK_KP_Down:
1230             // prevent the zoom field from activation
1231             if (!MOD__CTRL_ONLY)
1232                 ret = TRUE;
1233             break;
1234         default:
1235             break;
1236         }
1237         break;
1238     default:
1239         break;
1240     }
1241
1242     if (!ret) {
1243         if (((SPEventContextClass *) parent_class)->root_handler) {
1244             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1245         }
1246     }
1247
1248     return ret;
1249 }
1250
1251
1252 static void sp_flood_finish(SPFloodContext *rc)
1253 {
1254     rc->_message_context->clear();
1255
1256     if ( rc->item != NULL ) {
1257         SPDesktop * desktop;
1258
1259         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
1260
1261         SP_OBJECT(rc->item)->updateRepr();
1262
1263         sp_canvas_end_forced_full_redraws(desktop->canvas);
1264
1265         sp_desktop_selection(desktop)->set(rc->item);
1266         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
1267                         _("Fill bounded area"));
1268
1269         rc->item = NULL;
1270     }
1271 }
1272
1273 void flood_channels_set_channels( gint channels )
1274 {
1275     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
1276 }
1277
1278 /*
1279   Local Variables:
1280   mode:c++
1281   c-file-style:"stroustrup"
1282   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1283   indent-tabs-mode:nil
1284   fill-column:99
1285   End:
1286 */
1287 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :