src/pen-context.cpp

   1 /** \file
   2  * Pen event context implementation.
   3  */
   4
   5 /*
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * Copyright (C) 2000 Lauris Kaplinski
  11  * Copyright (C) 2000-2001 Ximian, Inc.
  12  * Copyright (C) 2002 Lauris Kaplinski
  13  * Copyright (C) 2004 Monash University
  14  *
  15  * Released under GNU GPL, read the file 'COPYING' for more information
  16  */
  17
  18 #include <gdk/gdkkeysyms.h>
  19
  20 #include "pen-context.h"
  21 #include "sp-namedview.h"
  22 #include "sp-metrics.h"
  23 #include "desktop.h"
  24 #include "desktop-handles.h"
  25 #include "selection.h"
  26 #include "draw-anchor.h"
  27 #include "message-stack.h"
  28 #include "message-context.h"
  29 #include "prefs-utils.h"
  30 #include "sp-path.h"
  31
  32 #include "pixmaps/cursor-pen.xpm"
  33 #include "pixmaps/cursor-pen.pixbuf"
  34 #include "display/canvas-bpath.h"
  35 #include "display/sp-ctrlline.h"
  36 #include "display/sodipodi-ctrl.h"
  37 #include <glibmm/i18n.h>
  38 #include "libnr/n-art-bpath.h"
  39 #include "helper/units.h"
  40 #include "macros.h"
  41 #include "context-fns.h"
  42
  43
  44 static void sp_pen_context_class_init(SPPenContextClass *klass);
  45 static void sp_pen_context_init(SPPenContext *pc);
  46 static void sp_pen_context_dispose(GObject *object);
  47
  48 static void sp_pen_context_setup(SPEventContext *ec);
  49 static void sp_pen_context_finish(SPEventContext *ec);
  50 static void sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  51 static gint sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event);
  52
  53 static void spdc_pen_set_initial_point(SPPenContext *pc, NR::Point const p);
  54 static void spdc_pen_set_subsequent_point(SPPenContext *pc, NR::Point const p, bool statusbar);
  55 static void spdc_pen_set_ctrl(SPPenContext *pc, NR::Point const p, guint state);
  56 static void spdc_pen_finish_segment(SPPenContext *pc, NR::Point p, guint state);
  57
  58 static void spdc_pen_finish(SPPenContext *pc, gboolean closed);
  59
  60 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent);
  61 static gint pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent);
  62 static gint pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent);
  63 static gint pen_handle_2button_press(SPPenContext *const pc);
  64 static gint pen_handle_key_press(SPPenContext *const pc, GdkEvent *event);
  65 static void spdc_reset_colors(SPPenContext *pc);
  66
  67 static void pen_disable_events(SPPenContext *const pc);
  68 static void pen_enable_events(SPPenContext *const pc);
  69
  70 static NR::Point pen_drag_origin_w(0, 0);
  71 static bool pen_within_tolerance = false;
  72
  73 static SPDrawContextClass *pen_parent_class;
  74
  75 /**
  76  * Register SPPenContext with Gdk and return its type.
  77  */
  78 GType
  79 sp_pen_context_get_type(void)
  80 {
  81     static GType type = 0;
  82     if (!type) {
  83         GTypeInfo info = {
  84             sizeof(SPPenContextClass),
  85             NULL, NULL,
  86             (GClassInitFunc) sp_pen_context_class_init,
  87             NULL, NULL,
  88             sizeof(SPPenContext),
  89             4,
  90             (GInstanceInitFunc) sp_pen_context_init,
  91             NULL,   /* value_table */
  92         };
  93         type = g_type_register_static(SP_TYPE_DRAW_CONTEXT, "SPPenContext", &info, (GTypeFlags)0);
  94     }
  95     return type;
  96 }
  97
  98 /**
  99  * Initialize the SPPenContext vtable.
 100  */
 101 static void
 102 sp_pen_context_class_init(SPPenContextClass *klass)
 103 {
 104     GObjectClass *object_class;
 105     SPEventContextClass *event_context_class;
 106
 107     object_class = (GObjectClass *) klass;
 108     event_context_class = (SPEventContextClass *) klass;
 109
 110     pen_parent_class = (SPDrawContextClass*)g_type_class_peek_parent(klass);
 111
 112     object_class->dispose = sp_pen_context_dispose;
 113
 114     event_context_class->setup = sp_pen_context_setup;
 115     event_context_class->finish = sp_pen_context_finish;
 116     event_context_class->set = sp_pen_context_set;
 117     event_context_class->root_handler = sp_pen_context_root_handler;
 118 }
 119
 120 /**
 121  * Callback to initialize SPPenContext object.
 122  */
 123 static void
 124 sp_pen_context_init(SPPenContext *pc)
 125 {
 126
 127     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 128
 129     event_context->cursor_shape = cursor_pen_xpm;
 130     event_context->cursor_pixbuf = gdk_pixbuf_new_from_inline(
 131             -1,
 132             cursor_pen_pixbuf,
 133             FALSE,
 134             NULL);
 135     event_context->hot_x = 4;
 136     event_context->hot_y = 4;
 137
 138     pc->npoints = 0;
 139     pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
 140     pc->state = SP_PEN_CONTEXT_POINT;
 141
 142     pc->c0 = NULL;
 143     pc->c1 = NULL;
 144     pc->cl0 = NULL;
 145     pc->cl1 = NULL;
 146
 147     pc->events_disabled = 0;
 148 }
 149
 150 /**
 151  * Callback to destroy the SPPenContext object's members and itself.
 152  */
 153 static void
 154 sp_pen_context_dispose(GObject *object)
 155 {
 156     SPPenContext *pc;
 157
 158     pc = SP_PEN_CONTEXT(object);
 159
 160     if (pc->c0) {
 161         gtk_object_destroy(GTK_OBJECT(pc->c0));
 162         pc->c0 = NULL;
 163     }
 164     if (pc->c1) {
 165         gtk_object_destroy(GTK_OBJECT(pc->c1));
 166         pc->c1 = NULL;
 167     }
 168     if (pc->cl0) {
 169         gtk_object_destroy(GTK_OBJECT(pc->cl0));
 170         pc->cl0 = NULL;
 171     }
 172     if (pc->cl1) {
 173         gtk_object_destroy(GTK_OBJECT(pc->cl1));
 174         pc->cl1 = NULL;
 175     }
 176
 177     G_OBJECT_CLASS(pen_parent_class)->dispose(object);
 178 }
 179
 180 /**
 181  * Callback to initialize SPPenContext object.
 182  */
 183 static void
 184 sp_pen_context_setup(SPEventContext *ec)
 185 {
 186     SPPenContext *pc;
 187
 188     pc = SP_PEN_CONTEXT(ec);
 189
 190     if (((SPEventContextClass *) pen_parent_class)->setup) {
 191         ((SPEventContextClass *) pen_parent_class)->setup(ec);
 192     }
 193
 194     /* Pen indicators */
 195     pc->c0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
 196                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
 197     pc->c1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
 198                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
 199     pc->cl0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
 200     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl0), 0x0000007f);
 201     pc->cl1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
 202     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl1), 0x0000007f);
 203
 204     sp_canvas_item_hide(pc->c0);
 205     sp_canvas_item_hide(pc->c1);
 206     sp_canvas_item_hide(pc->cl0);
 207     sp_canvas_item_hide(pc->cl1);
 208
 209     sp_event_context_read(ec, "mode");
 210
 211     pc->anchor_statusbar = false;
 212
 213     if (prefs_get_int_attribute("tools.freehand.pen", "selcue", 0) != 0) {
 214         ec->enableSelectionCue();
 215     }
 216 }
 217
 218 static void
 219 pen_cancel (SPPenContext *const pc)
 220 {
 221     pc->state = SP_PEN_CONTEXT_STOP;
 222     spdc_reset_colors(pc);
 223     sp_canvas_item_hide(pc->c0);
 224     sp_canvas_item_hide(pc->c1);
 225     sp_canvas_item_hide(pc->cl0);
 226     sp_canvas_item_hide(pc->cl1);
 227     pc->_message_context->clear();
 228     pc->_message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
 229 }
 230
 231 /**
 232  * Finalization callback.
 233  */
 234 static void
 235 sp_pen_context_finish(SPEventContext *ec)
 236 {
 237     SPPenContext *pc = SP_PEN_CONTEXT(ec);
 238
 239     if (pc->npoints != 0) {
 240         pen_cancel (pc);
 241     }
 242
 243     if (((SPEventContextClass *) pen_parent_class)->finish) {
 244         ((SPEventContextClass *) pen_parent_class)->finish(ec);
 245     }
 246 }
 247
 248 /**
 249  * Callback that sets key to value in pen context.
 250  */
 251 static void
 252 sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 253 {
 254     SPPenContext *pc = SP_PEN_CONTEXT(ec);
 255
 256     if (!strcmp(key, "mode")) {
 257         if ( val && !strcmp(val, "drag") ) {
 258             pc->mode = SP_PEN_CONTEXT_MODE_DRAG;
 259         } else {
 260             pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
 261         }
 262     }
 263 }
 264
 265 /**
 266  * Snaps new node relative to the previous node.
 267  */
 268 static void
 269 spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state)
 270 {
 271     if (pc->npoints > 0) {
 272         spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
 273     }
 274
 275     spdc_endpoint_snap_free(pc, p, state);
 276 }
 277
 278 /**
 279  * Snaps new node's handle relative to the new node.
 280  */
 281 static void
 282 spdc_endpoint_snap_handle(SPPenContext const *const pc, NR::Point &p, guint const state)
 283 {
 284     g_return_if_fail(( pc->npoints == 2 ||
 285                        pc->npoints == 5   ));
 286
 287     spdc_endpoint_snap_rotation(pc, p, pc->p[pc->npoints - 2], state);
 288     spdc_endpoint_snap_free(pc, p, state);
 289 }
 290
 291 /**
 292  * Callback to handle all pen events.
 293  */
 294 static gint
 295 sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event)
 296 {
 297     SPPenContext *const pc = SP_PEN_CONTEXT(ec);
 298
 299     gint ret = FALSE;
 300
 301     switch (event->type) {
 302         case GDK_BUTTON_PRESS:
 303             ret = pen_handle_button_press(pc, event->button);
 304             break;
 305
 306         case GDK_MOTION_NOTIFY:
 307             ret = pen_handle_motion_notify(pc, event->motion);
 308             break;
 309
 310         case GDK_BUTTON_RELEASE:
 311             ret = pen_handle_button_release(pc, event->button);
 312             break;
 313
 314         case GDK_2BUTTON_PRESS:
 315             ret = pen_handle_2button_press(pc);
 316             break;
 317
 318         case GDK_KEY_PRESS:
 319             ret = pen_handle_key_press(pc, event);
 320             break;
 321
 322         default:
 323             break;
 324     }
 325
 326     if (!ret) {
 327         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 328             = ((SPEventContextClass *) pen_parent_class)->root_handler;
 329         if (parent_root_handler) {
 330             ret = parent_root_handler(ec, event);
 331         }
 332     }
 333
 334     return ret;
 335 }
 336
 337 /**
 338  * Handle mouse button press event.
 339  */
 340 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent)
 341 {
 342     if (pc->events_disabled) {
 343         // skip event processing if events are disabled
 344         return FALSE;
 345     }
 346
 347     gint ret = FALSE;
 348     if (bevent.button == 1) {
 349
 350         SPDrawContext * const dc = SP_DRAW_CONTEXT(pc);
 351         SPDesktop * const desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 352
 353         if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
 354             return TRUE;
 355         }
 356
 357         NR::Point const event_w(bevent.x, bevent.y);
 358         pen_drag_origin_w = event_w;
 359         pen_within_tolerance = true;
 360
 361         /* Test whether we hit any anchor. */
 362         SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w);
 363
 364         NR::Point const event_dt(desktop->w2d(event_w));
 365         switch (pc->mode) {
 366             case SP_PEN_CONTEXT_MODE_CLICK:
 367                 /* In click mode we add point on release */
 368                 switch (pc->state) {
 369                     case SP_PEN_CONTEXT_POINT:
 370                     case SP_PEN_CONTEXT_CONTROL:
 371                     case SP_PEN_CONTEXT_CLOSE:
 372                         break;
 373                     case SP_PEN_CONTEXT_STOP:
 374                         /* This is allowed, if we just cancelled curve */
 375                         pc->state = SP_PEN_CONTEXT_POINT;
 376                         break;
 377                     default:
 378                         break;
 379                 }
 380                 break;
 381             case SP_PEN_CONTEXT_MODE_DRAG:
 382                 switch (pc->state) {
 383                     case SP_PEN_CONTEXT_STOP:
 384                         /* This is allowed, if we just cancelled curve */
 385                     case SP_PEN_CONTEXT_POINT:
 386                         if (pc->npoints == 0) {
 387
 388                             /* Set start anchor */
 389                             pc->sa = anchor;
 390                             NR::Point p;
 391                             if (anchor) {
 392
 393                                 /* Adjust point to anchor if needed */
 394                                 p = anchor->dp;
 395                                 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
 396
 397                             } else {
 398
 399                                 // This is the first click of a new curve; deselect item so that
 400                                 // this curve is not combined with it (unless it is drawn from its
 401                                 // anchor, which is handled by the sibling branch above)
 402                                 Inkscape::Selection * const selection = sp_desktop_selection(desktop);
 403                                 if (!(bevent.state & GDK_SHIFT_MASK)) {
 404
 405                                     selection->clear();
 406                                     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
 407
 408                                 } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
 409
 410                                     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
 411                                 }
 412
 413                                 /* Create green anchor */
 414                                 p = event_dt;
 415                                 spdc_endpoint_snap(pc, p, bevent.state);
 416                                 pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
 417                             }
 418                             spdc_pen_set_initial_point(pc, p);
 419                         } else {
 420
 421                             /* Set end anchor */
 422                             pc->ea = anchor;
 423                             NR::Point p;
 424                             if (anchor) {
 425
 426                                 p = anchor->dp;
 427                                 // we hit an anchor, will finish the curve (either with or without closing)
 428                                 // in release handler
 429                                 pc->state = SP_PEN_CONTEXT_CLOSE;
 430
 431                                 if (pc->green_anchor && pc->green_anchor->active) {
 432                                     // we clicked on the current curve start, so close it even if
 433                                     // we drag a handle away from it
 434                                     dc->green_closed = TRUE;
 435                                 }
 436                                 ret = TRUE;
 437                                 break;
 438
 439                             } else {
 440
 441                                 p = event_dt;
 442                                 spdc_endpoint_snap(pc, p, bevent.state); /* Snap node only if not hitting anchor. */
 443                                 spdc_pen_set_subsequent_point(pc, p, true);
 444                             }
 445
 446                         }
 447                         pc->state = SP_PEN_CONTEXT_CONTROL;
 448                         ret = TRUE;
 449                         break;
 450                     case SP_PEN_CONTEXT_CONTROL:
 451                         g_warning("Button down in CONTROL state");
 452                         break;
 453                     case SP_PEN_CONTEXT_CLOSE:
 454                         g_warning("Button down in CLOSE state");
 455                         break;
 456                     default:
 457                         break;
 458                 }
 459                 break;
 460             default:
 461                 break;
 462         }
 463     } else if (bevent.button == 3) {
 464         if (pc->npoints != 0) {
 465             spdc_pen_finish(pc, FALSE);
 466             ret = TRUE;
 467         }
 468     }
 469
 470     return ret;
 471 }
 472
 473 /**
 474  * Handle motion_notify event.
 475  */
 476 static gint
 477 pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent)
 478 {
 479     gint ret = FALSE;
 480
 481     if (mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 482         // allow middle-button scrolling
 483         return FALSE;
 484     }
 485
 486     if (pc->events_disabled) {
 487         // skip motion events if pen events are disabled
 488         return FALSE;
 489     }
 490
 491     NR::Point const event_w(mevent.x,
 492                             mevent.y);
 493     if (pen_within_tolerance) {
 494         gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
 495                                                                "value", 0, 0, 100);
 496         if ( NR::LInfty( event_w - pen_drag_origin_w ) < tolerance ) {
 497             return FALSE;   // Do not drag if we're within tolerance from origin.
 498         }
 499     }
 500     // Once the user has moved farther than tolerance from the original location
 501     // (indicating they intend to move the object, not click), then always process the
 502     // motion notify coordinates as given (no snapping back to origin)
 503     pen_within_tolerance = false;
 504
 505     SPDesktop *const dt = pc->desktop;
 506     if ( ( mevent.state & GDK_BUTTON1_MASK ) && !pc->grab ) {
 507         /* Grab mouse, so release will not pass unnoticed */
 508         pc->grab = SP_CANVAS_ITEM(dt->acetate);
 509         sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK   |
 510                                         GDK_BUTTON_RELEASE_MASK |
 511                                         GDK_POINTER_MOTION_MASK  ),
 512                             NULL, mevent.time);
 513     }
 514
 515     /* Find desktop coordinates */
 516     NR::Point p = dt->w2d(event_w);
 517
 518     /* Test, whether we hit any anchor */
 519     SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
 520
 521     switch (pc->mode) {
 522         case SP_PEN_CONTEXT_MODE_CLICK:
 523             switch (pc->state) {
 524                 case SP_PEN_CONTEXT_POINT:
 525                     if ( pc->npoints != 0 ) {
 526                         /* Only set point, if we are already appending */
 527                         spdc_endpoint_snap(pc, p, mevent.state);
 528                         spdc_pen_set_subsequent_point(pc, p, true);
 529                         ret = TRUE;
 530                     }
 531                     break;
 532                 case SP_PEN_CONTEXT_CONTROL:
 533                 case SP_PEN_CONTEXT_CLOSE:
 534                     /* Placing controls is last operation in CLOSE state */
 535                     spdc_endpoint_snap(pc, p, mevent.state);
 536                     spdc_pen_set_ctrl(pc, p, mevent.state);
 537                     ret = TRUE;
 538                     break;
 539                 case SP_PEN_CONTEXT_STOP:
 540                     /* This is perfectly valid */
 541                     break;
 542                 default:
 543                     break;
 544             }
 545             break;
 546         case SP_PEN_CONTEXT_MODE_DRAG:
 547             switch (pc->state) {
 548                 case SP_PEN_CONTEXT_POINT:
 549                     if ( pc->npoints > 0 ) {
 550                         /* Only set point, if we are already appending */
 551
 552                         if (!anchor) {   /* Snap node only if not hitting anchor */
 553                             spdc_endpoint_snap(pc, p, mevent.state);
 554                         }
 555
 556                         spdc_pen_set_subsequent_point(pc, p, !anchor);
 557
 558                         if (anchor && !pc->anchor_statusbar) {
 559                             pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
 560                             pc->anchor_statusbar = true;
 561                         } else if (!anchor && pc->anchor_statusbar) {
 562                             pc->_message_context->clear();
 563                             pc->anchor_statusbar = false;
 564                         }
 565
 566                         ret = TRUE;
 567                     } else {
 568                         if (anchor && !pc->anchor_statusbar) {
 569                             pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
 570                             pc->anchor_statusbar = true;
 571                         } else if (!anchor && pc->anchor_statusbar) {
 572                             pc->_message_context->clear();
 573                             pc->anchor_statusbar = false;
 574                         }
 575                     }
 576                     break;
 577                 case SP_PEN_CONTEXT_CONTROL:
 578                 case SP_PEN_CONTEXT_CLOSE:
 579                     /* Placing controls is last operation in CLOSE state */
 580
 581                     // snap the handle
 582                     spdc_endpoint_snap_handle(pc, p, mevent.state);
 583
 584                     spdc_pen_set_ctrl(pc, p, mevent.state);
 585                     ret = TRUE;
 586                     break;
 587                 case SP_PEN_CONTEXT_STOP:
 588                     /* This is perfectly valid */
 589                     break;
 590                 default:
 591                     break;
 592             }
 593             break;
 594         default:
 595             break;
 596     }
 597     return ret;
 598 }
 599
 600 /**
 601  * Handle mouse button release event.
 602  */
 603 static gint
 604 pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent)
 605 {
 606     if (pc->events_disabled) {
 607         // skip event processing if events are disabled
 608         return FALSE;
 609     }
 610
 611     gint ret = FALSE;
 612     if ( revent.button == 1 ) {
 613
 614         SPDrawContext *dc = SP_DRAW_CONTEXT (pc);
 615
 616         NR::Point const event_w(revent.x,
 617                                 revent.y);
 618         /* Find desktop coordinates */
 619         NR::Point p = pc->desktop->w2d(event_w);
 620
 621         /* Test whether we hit any anchor. */
 622         SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
 623
 624         switch (pc->mode) {
 625             case SP_PEN_CONTEXT_MODE_CLICK:
 626                 switch (pc->state) {
 627                     case SP_PEN_CONTEXT_POINT:
 628                         if ( pc->npoints == 0 ) {
 629                             /* Start new thread only with button release */
 630                             if (anchor) {
 631                                 p = anchor->dp;
 632                             }
 633                             pc->sa = anchor;
 634                             spdc_pen_set_initial_point(pc, p);
 635                         } else {
 636                             /* Set end anchor here */
 637                             pc->ea = anchor;
 638                             if (anchor) {
 639                                 p = anchor->dp;
 640                             }
 641                         }
 642                         pc->state = SP_PEN_CONTEXT_CONTROL;
 643                         ret = TRUE;
 644                         break;
 645                     case SP_PEN_CONTEXT_CONTROL:
 646                         /* End current segment */
 647                         spdc_endpoint_snap(pc, p, revent.state);
 648                         spdc_pen_finish_segment(pc, p, revent.state);
 649                         pc->state = SP_PEN_CONTEXT_POINT;
 650                         ret = TRUE;
 651                         break;
 652                     case SP_PEN_CONTEXT_CLOSE:
 653                         /* End current segment */
 654                         if (!anchor) {   /* Snap node only if not hitting anchor */
 655                             spdc_endpoint_snap(pc, p, revent.state);
 656                         }
 657                         spdc_pen_finish_segment(pc, p, revent.state);
 658                         spdc_pen_finish(pc, TRUE);
 659                         pc->state = SP_PEN_CONTEXT_POINT;
 660                         ret = TRUE;
 661                         break;
 662                     case SP_PEN_CONTEXT_STOP:
 663                         /* This is allowed, if we just cancelled curve */
 664                         pc->state = SP_PEN_CONTEXT_POINT;
 665                         ret = TRUE;
 666                         break;
 667                     default:
 668                         break;
 669                 }
 670                 break;
 671             case SP_PEN_CONTEXT_MODE_DRAG:
 672                 switch (pc->state) {
 673                     case SP_PEN_CONTEXT_POINT:
 674                     case SP_PEN_CONTEXT_CONTROL:
 675                         spdc_endpoint_snap(pc, p, revent.state);
 676                         spdc_pen_finish_segment(pc, p, revent.state);
 677                         break;
 678                     case SP_PEN_CONTEXT_CLOSE:
 679                         spdc_endpoint_snap(pc, p, revent.state);
 680                         spdc_pen_finish_segment(pc, p, revent.state);
 681                         if (pc->green_closed) {
 682                             // finishing at the start anchor, close curve
 683                             spdc_pen_finish(pc, TRUE);
 684                         } else {
 685                             // finishing at some other anchor, finish curve but not close
 686                             spdc_pen_finish(pc, FALSE);
 687                         }
 688                         break;
 689                     case SP_PEN_CONTEXT_STOP:
 690                         /* This is allowed, if we just cancelled curve */
 691                         break;
 692                     default:
 693                         break;
 694                 }
 695                 pc->state = SP_PEN_CONTEXT_POINT;
 696                 ret = TRUE;
 697                 break;
 698             default:
 699                 break;
 700         }
 701
 702         if (pc->grab) {
 703             /* Release grab now */
 704             sp_canvas_item_ungrab(pc->grab, revent.time);
 705             pc->grab = NULL;
 706         }
 707
 708         ret = TRUE;
 709
 710         dc->green_closed = FALSE;
 711     }
 712
 713     return ret;
 714 }
 715
 716 static gint
 717 pen_handle_2button_press(SPPenContext *const pc)
 718 {
 719     gint ret = FALSE;
 720     if (pc->npoints != 0) {
 721         spdc_pen_finish(pc, FALSE);
 722         ret = TRUE;
 723     }
 724     return ret;
 725 }
 726
 727 void
 728 pen_redraw_all (SPPenContext *const pc)
 729 {
 730     // green
 731     if (pc->green_bpaths) {
 732         // remove old piecewise green canvasitems
 733         while (pc->green_bpaths) {
 734             gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
 735             pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
 736         }
 737         // one canvas bpath for all of green_curve
 738         SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
 739         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 740         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
 741
 742         pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
 743     }
 744
 745     if (pc->green_anchor)
 746         SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
 747
 748     sp_curve_reset(pc->red_curve);
 749     sp_curve_moveto(pc->red_curve, pc->p[0]);
 750     sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
 751     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
 752
 753     // handles
 754     if (pc->p[0] != pc->p[1]) {
 755         SP_CTRL(pc->c1)->moveto(pc->p[1]);
 756         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
 757         sp_canvas_item_show (pc->c1);
 758         sp_canvas_item_show (pc->cl1);
 759     } else {
 760         sp_canvas_item_hide (pc->c1);
 761         sp_canvas_item_hide (pc->cl1);
 762     }
 763
 764     NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
 765     if (bpath) {
 766         if (bpath->code == NR_CURVETO && NR::Point(bpath->x2, bpath->y2) != pc->p[0]) {
 767             SP_CTRL(pc->c0)->moveto(NR::Point(bpath->x2, bpath->y2));
 768             sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), NR::Point(bpath->x2, bpath->y2), pc->p[0]);
 769             sp_canvas_item_show (pc->c0);
 770             sp_canvas_item_show (pc->cl0);
 771         } else {
 772             sp_canvas_item_hide (pc->c0);
 773             sp_canvas_item_hide (pc->cl0);
 774         }
 775     }
 776 }
 777
 778 void
 779 pen_lastpoint_move (SPPenContext *const pc, gdouble x, gdouble y)
 780 {
 781     if (pc->npoints != 5)
 782         return;
 783
 784     // green
 785     NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
 786     if (bpath) {
 787         if (bpath->code == NR_CURVETO) {
 788             bpath->x2 += x;
 789             bpath->y2 += y;
 790         }
 791         bpath->x3 += x;
 792         bpath->y3 += y;
 793     } else {
 794         // start anchor too
 795         if (pc->green_anchor) {
 796             pc->green_anchor->dp += NR::Point(x, y);
 797         }
 798     }
 799
 800     // red
 801     pc->p[0] += NR::Point(x, y);
 802     pc->p[1] += NR::Point(x, y);
 803     pen_redraw_all(pc);
 804 }
 805
 806 void
 807 pen_lastpoint_move_screen (SPPenContext *const pc, gdouble x, gdouble y)
 808 {
 809     pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
 810 }
 811
 812 void
 813 pen_lastpoint_tocurve (SPPenContext *const pc)
 814 {
 815     if (pc->npoints != 5)
 816         return;
 817
 818     // red
 819     NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
 820     if (bpath && bpath->code == NR_CURVETO) {
 821         pc->p[1] = pc->p[0] + (NR::Point(bpath->x3, bpath->y3) - NR::Point(bpath->x2, bpath->y2));
 822     } else {
 823         pc->p[1] = pc->p[0] + (pc->p[3] - pc->p[0])*(1/3);
 824     }
 825
 826     pen_redraw_all(pc);
 827 }
 828
 829 void
 830 pen_lastpoint_toline (SPPenContext *const pc)
 831 {
 832     if (pc->npoints != 5)
 833         return;
 834
 835     pc->p[1] = pc->p[0];
 836
 837     pen_redraw_all(pc);
 838 }
 839
 840
 841 static gint
 842 pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
 843 {
 844     gint ret = FALSE;
 845     gdouble const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
 846
 847     switch (get_group0_keyval (&event->key)) {
 848
 849         case GDK_Left: // move last point left
 850         case GDK_KP_Left:
 851         case GDK_KP_4:
 852             if (!MOD__CTRL) { // not ctrl
 853                 if (MOD__ALT) { // alt
 854                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, -10, 0); // shift
 855                     else pen_lastpoint_move_screen(pc, -1, 0); // no shift
 856                 }
 857                 else { // no alt
 858                     if (MOD__SHIFT) pen_lastpoint_move(pc, -10*nudge, 0); // shift
 859                     else pen_lastpoint_move(pc, -nudge, 0); // no shift
 860                 }
 861                 ret = TRUE;
 862             }
 863             break;
 864         case GDK_Up: // move last point up
 865         case GDK_KP_Up:
 866         case GDK_KP_8:
 867             if (!MOD__CTRL) { // not ctrl
 868                 if (MOD__ALT) { // alt
 869                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, 10); // shift
 870                     else pen_lastpoint_move_screen(pc, 0, 1); // no shift
 871                 }
 872                 else { // no alt
 873                     if (MOD__SHIFT) pen_lastpoint_move(pc, 0, 10*nudge); // shift
 874                     else pen_lastpoint_move(pc, 0, nudge); // no shift
 875                 }
 876                 ret = TRUE;
 877             }
 878             break;
 879         case GDK_Right: // move last point right
 880         case GDK_KP_Right:
 881         case GDK_KP_6:
 882             if (!MOD__CTRL) { // not ctrl
 883                 if (MOD__ALT) { // alt
 884                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 10, 0); // shift
 885                     else pen_lastpoint_move_screen(pc, 1, 0); // no shift
 886                 }
 887                 else { // no alt
 888                     if (MOD__SHIFT) pen_lastpoint_move(pc, 10*nudge, 0); // shift
 889                     else pen_lastpoint_move(pc, nudge, 0); // no shift
 890                 }
 891                 ret = TRUE;
 892             }
 893             break;
 894         case GDK_Down: // move last point down
 895         case GDK_KP_Down:
 896         case GDK_KP_2:
 897             if (!MOD__CTRL) { // not ctrl
 898                 if (MOD__ALT) { // alt
 899                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, -10); // shift
 900                     else pen_lastpoint_move_screen(pc, 0, -1); // no shift
 901                 }
 902                 else { // no alt
 903                     if (MOD__SHIFT) pen_lastpoint_move(pc, 0, -10*nudge); // shift
 904                     else pen_lastpoint_move(pc, 0, -nudge); // no shift
 905                 }
 906                 ret = TRUE;
 907             }
 908             break;
 909
 910         case GDK_U:
 911         case GDK_u:
 912             if (MOD__SHIFT_ONLY) {
 913                 pen_lastpoint_tocurve(pc);
 914                 ret = TRUE;
 915             }
 916             break;
 917         case GDK_L:
 918         case GDK_l:
 919             if (MOD__SHIFT_ONLY) {
 920                 pen_lastpoint_toline(pc);
 921                 ret = TRUE;
 922             }
 923             break;
 924
 925         case GDK_Return:
 926         case GDK_KP_Enter:
 927             if (pc->npoints != 0) {
 928                 pen_disable_events(pc);
 929                 spdc_pen_finish(pc, FALSE);
 930                 pen_enable_events(pc);
 931                 ret = TRUE;
 932             }
 933             break;
 934         case GDK_Escape:
 935             if (pc->npoints != 0) {
 936                 // if drawing, cancel, otherwise pass it up for deselecting
 937                 pen_cancel (pc);
 938                 ret = TRUE;
 939             }
 940             break;
 941         case GDK_z:
 942         case GDK_Z:
 943             if (MOD__CTRL_ONLY && pc->npoints != 0) {
 944                 // if drawing, cancel, otherwise pass it up for undo
 945                 pen_cancel (pc);
 946                 ret = TRUE;
 947             }
 948             break;
 949         case GDK_BackSpace:
 950         case GDK_Delete:
 951         case GDK_KP_Delete:
 952             if (sp_curve_is_empty(pc->green_curve)) {
 953                 pen_cancel (pc);
 954                 ret = TRUE;
 955             } else {
 956                 /* Reset red curve */
 957                 sp_curve_reset(pc->red_curve);
 958                 /* Destroy topmost green bpath */
 959                 if (pc->green_bpaths) {
 960                     if (pc->green_bpaths->data)
 961                         gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
 962                     pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
 963                 }
 964                 /* Get last segment */
 965                 NArtBpath const *const p = SP_CURVE_BPATH(pc->green_curve);
 966                 gint const e = SP_CURVE_LENGTH(pc->green_curve);
 967                 if ( e < 2 ) {
 968                     g_warning("Green curve length is %d", e);
 969                     break;
 970                 }
 971                 pc->p[0] = p[e - 2].c(3);
 972                 if (p[e - 1].code == NR_CURVETO) {
 973                     pc->p[1] = p[e - 1].c(1);
 974                 } else {
 975                     pc->p[1] = pc->p[0];
 976                 }
 977                 NR::Point const pt(( pc->npoints < 4
 978                                      ? p[e - 1].c(3)
 979                                      : pc->p[3] ));
 980                 pc->npoints = 2;
 981                 sp_curve_backspace(pc->green_curve);
 982                 sp_canvas_item_hide(pc->c0);
 983                 sp_canvas_item_hide(pc->c1);
 984                 sp_canvas_item_hide(pc->cl0);
 985                 sp_canvas_item_hide(pc->cl1);
 986                 pc->state = SP_PEN_CONTEXT_POINT;
 987                 spdc_pen_set_subsequent_point(pc, pt, true);
 988                 ret = TRUE;
 989             }
 990             break;
 991         default:
 992             break;
 993     }
 994     return ret;
 995 }
 996
 997 static void
 998 spdc_reset_colors(SPPenContext *pc)
 999 {
1000     /* Red */
1001     sp_curve_reset(pc->red_curve);
1002     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1003     /* Blue */
1004     sp_curve_reset(pc->blue_curve);
1005     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), NULL);
1006     /* Green */
1007     while (pc->green_bpaths) {
1008         gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
1009         pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
1010     }
1011     sp_curve_reset(pc->green_curve);
1012     if (pc->green_anchor) {
1013         pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1014     }
1015     pc->sa = NULL;
1016     pc->ea = NULL;
1017     pc->npoints = 0;
1018     pc->red_curve_is_valid = false;
1019 }
1020
1021
1022 static void
1023 spdc_pen_set_initial_point(SPPenContext *const pc, NR::Point const p)
1024 {
1025     g_assert( pc->npoints == 0 );
1026
1027     pc->p[0] = p;
1028     pc->p[1] = p;
1029     pc->npoints = 2;
1030     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1031 }
1032
1033 static void
1034 spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar)
1035 {
1036     g_assert( pc->npoints != 0 );
1037     /* todo: Check callers to see whether 2 <= npoints is guaranteed. */
1038
1039     pc->p[2] = p;
1040     pc->p[3] = p;
1041     pc->p[4] = p;
1042     pc->npoints = 5;
1043     sp_curve_reset(pc->red_curve);
1044     sp_curve_moveto(pc->red_curve, pc->p[0]);
1045     bool is_curve;
1046     if ( (pc->onlycurves)
1047          || ( pc->p[1] != pc->p[0] ) )
1048     {
1049         sp_curve_curveto(pc->red_curve, pc->p[1], p, p);
1050         is_curve = true;
1051     } else {
1052         sp_curve_lineto(pc->red_curve, p);
1053         is_curve = false;
1054     }
1055     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1056
1057     if (statusbar) {
1058         // status text
1059         SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1060         NR::Point rel = p - pc->p[0];
1061         GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1062         double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1063         if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1064             angle = angle_to_compass (angle);
1065         pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>%s</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path"), is_curve? "Curve segment" : "Line segment", angle, dist->str);
1066         g_string_free(dist, FALSE);
1067     }
1068 }
1069
1070 static void
1071 spdc_pen_set_ctrl(SPPenContext *const pc, NR::Point const p, guint const state)
1072 {
1073     sp_canvas_item_show(pc->c1);
1074     sp_canvas_item_show(pc->cl1);
1075
1076     if ( pc->npoints == 2 ) {
1077         pc->p[1] = p;
1078         sp_canvas_item_hide(pc->c0);
1079         sp_canvas_item_hide(pc->cl0);
1080         SP_CTRL(pc->c1)->moveto(pc->p[1]);
1081         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
1082
1083         // status text
1084         SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1085         NR::Point rel = p - pc->p[0];
1086         GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1087         double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1088         if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1089             angle = angle_to_compass (angle);
1090         pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle"), angle, dist->str);
1091         g_string_free(dist, FALSE);
1092
1093     } else if ( pc->npoints == 5 ) {
1094         pc->p[4] = p;
1095         sp_canvas_item_show(pc->c0);
1096         sp_canvas_item_show(pc->cl0);
1097         bool is_symm = false;
1098         if ( ( ( pc->mode == SP_PEN_CONTEXT_MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
1099              ( ( pc->mode == SP_PEN_CONTEXT_MODE_DRAG ) &&  !( state & GDK_SHIFT_MASK  ) ) ) {
1100             NR::Point delta = p - pc->p[3];
1101             pc->p[2] = pc->p[3] - delta;
1102             is_symm = true;
1103             sp_curve_reset(pc->red_curve);
1104             sp_curve_moveto(pc->red_curve, pc->p[0]);
1105             sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
1106             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1107         }
1108         SP_CTRL(pc->c0)->moveto(pc->p[2]);
1109         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), pc->p[3], pc->p[2]);
1110         SP_CTRL(pc->c1)->moveto(pc->p[4]);
1111         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[3], pc->p[4]);
1112
1113         // status text
1114         SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1115         NR::Point rel = p - pc->p[3];
1116         GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1117         double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1118         if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1119             angle = angle_to_compass (angle);
1120         pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>%s</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only"), is_symm? "Curve handle, symmetric" : "Curve handle", angle, dist->str);
1121         g_string_free(dist, FALSE);
1122
1123     } else {
1124         g_warning("Something bad happened - npoints is %d", pc->npoints);
1125     }
1126 }
1127
1128 static void
1129 spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const p, guint const state)
1130 {
1131     if (!sp_curve_empty(pc->red_curve)) {
1132         sp_curve_append_continuous(pc->green_curve, pc->red_curve, 0.0625);
1133         SPCurve *curve = sp_curve_copy(pc->red_curve);
1134         /// \todo fixme:
1135         SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
1136         sp_curve_unref(curve);
1137         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
1138
1139         pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
1140
1141         pc->p[0] = pc->p[3];
1142         pc->p[1] = pc->p[4];
1143         pc->npoints = 2;
1144
1145         sp_curve_reset(pc->red_curve);
1146     }
1147 }
1148
1149 static void
1150 spdc_pen_finish(SPPenContext *const pc, gboolean const closed)
1151 {
1152     SPDesktop *const desktop = pc->desktop;
1153     pc->_message_context->clear();
1154     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
1155
1156     sp_curve_reset(pc->red_curve);
1157     spdc_concat_colors_and_flush(pc, closed);
1158     pc->sa = NULL;
1159     pc->ea = NULL;
1160
1161     pc->npoints = 0;
1162     pc->state = SP_PEN_CONTEXT_POINT;
1163
1164     sp_canvas_item_hide(pc->c0);
1165     sp_canvas_item_hide(pc->c1);
1166     sp_canvas_item_hide(pc->cl0);
1167     sp_canvas_item_hide(pc->cl1);
1168
1169     if (pc->green_anchor) {
1170         pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1171     }
1172 }
1173
1174 static void
1175 pen_disable_events(SPPenContext *const pc) {
1176   pc->events_disabled++;
1177 }
1178
1179 static void
1180 pen_enable_events(SPPenContext *const pc) {
1181   g_return_if_fail(pc->events_disabled != 0);
1182
1183   pc->events_disabled--;
1184 }
1185
1186 /*
1187   Local Variables:
1188   mode:c++
1189   c-file-style:"stroustrup"
1190   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1191   indent-tabs-mode:nil
1192   fill-column:99
1193   End:
1194 */
1195 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :