src/box3d-context.cpp

   1 #define __SP_3DBOX_CONTEXT_C__
   2
   3 /*
   4  * 3D box drawing context
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * Copyright (C) 2007      Maximilian Albert <Anhalter42@gmx.de>
  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
  22 #include "macros.h"
  23 #include "display/sp-canvas.h"
  24 #include "document.h"
  25 #include "sp-namedview.h"
  26 #include "selection.h"
  27 #include "desktop-handles.h"
  28 #include "snap.h"
  29 #include "display/curve.h"
  30 #include "desktop.h"
  31 #include "message-context.h"
  32 #include "pixmaps/cursor-rect.xpm"
  33 #include "box3d.h"
  34 #include "box3d-context.h"
  35 #include "sp-metrics.h"
  36 #include <glibmm/i18n.h>
  37 #include "object-edit.h"
  38 #include "xml/repr.h"
  39 #include "xml/node-event-vector.h"
  40 #include "prefs-utils.h"
  41 #include "context-fns.h"
  42
  43 static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass);
  44 static void sp_3dbox_context_init(SP3DBoxContext *box3d_context);
  45 static void sp_3dbox_context_dispose(GObject *object);
  46
  47 static void sp_3dbox_context_setup(SPEventContext *ec);
  48 static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  49
  50 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  51 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  52
  53 static void sp_3dbox_drag(SP3DBoxContext &rc, guint state);
  54 static void sp_3dbox_finish(SP3DBoxContext *rc);
  55
  56 static SPEventContextClass *parent_class;
  57
  58
  59 GtkType sp_3dbox_context_get_type()
  60 {
  61     static GType type = 0;
  62     if (!type) {
  63         GTypeInfo info = {
  64             sizeof(SP3DBoxContextClass),
  65             NULL, NULL,
  66             (GClassInitFunc) sp_3dbox_context_class_init,
  67             NULL, NULL,
  68             sizeof(SP3DBoxContext),
  69             4,
  70             (GInstanceInitFunc) sp_3dbox_context_init,
  71             NULL,    /* value_table */
  72         };
  73         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SP3DBoxContext", &info, (GTypeFlags) 0);
  74     }
  75     return type;
  76 }
  77
  78 static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass)
  79 {
  80     GObjectClass *object_class = (GObjectClass *) klass;
  81     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
  82
  83     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
  84
  85     object_class->dispose = sp_3dbox_context_dispose;
  86
  87     event_context_class->setup = sp_3dbox_context_setup;
  88     event_context_class->set = sp_3dbox_context_set;
  89     event_context_class->root_handler  = sp_3dbox_context_root_handler;
  90     event_context_class->item_handler  = sp_3dbox_context_item_handler;
  91 }
  92
  93 Box3D::Perspective3D * SP3DBoxContext::current_perspective = NULL;
  94 guint SP3DBoxContext::number_of_handles = 3;
  95
  96 static void sp_3dbox_context_init(SP3DBoxContext *box3d_context)
  97 {
  98     SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);
  99
 100     event_context->cursor_shape = cursor_rect_xpm;
 101     event_context->hot_x = 4;
 102     event_context->hot_y = 4;
 103     event_context->xp = 0;
 104     event_context->yp = 0;
 105     event_context->tolerance = 0;
 106     event_context->within_tolerance = false;
 107     event_context->item_to_select = NULL;
 108
 109     event_context->shape_repr = NULL;
 110     event_context->shape_knot_holder = NULL;
 111
 112     box3d_context->item = NULL;
 113
 114     box3d_context->rx = 0.0;
 115     box3d_context->ry = 0.0;
 116
 117     box3d_context->ctrl_dragged = false;
 118     box3d_context->extruded = false;
 119
 120     /* create an initial perspective */
 121     if (!SP3DBoxContext::current_perspective) {
 122         SP3DBoxContext::current_perspective = new Box3D::Perspective3D (
 123                                               // VP in x-direction
 124                                               Box3D::VanishingPoint( NR::Point( 50.0, 600.0),
 125                                                                      NR::Point( -1.0,   0.0), Box3D::VP_INFINITE),
 126                                               // VP in y-direction
 127                                               Box3D::VanishingPoint( NR::Point(500.0,1000.0),
 128                                                                      NR::Point(  0.0,   1.0), Box3D::VP_INFINITE),
 129                                               // VP in z-direction
 130                                               Box3D::VanishingPoint( NR::Point(700.0, 500.0),
 131                                                                      NR::Point(sqrt(3.0),1.0), Box3D::VP_INFINITE));
 132     }
 133
 134     new (&box3d_context->sel_changed_connection) sigc::connection();
 135 }
 136
 137 static void sp_3dbox_context_dispose(GObject *object)
 138 {
 139     SP3DBoxContext *rc = SP_3DBOX_CONTEXT(object);
 140     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 141
 142     ec->enableGrDrag(false);
 143
 144     rc->sel_changed_connection.disconnect();
 145     rc->sel_changed_connection.~connection();
 146
 147     /* fixme: This is necessary because we do not grab */
 148     if (rc->item) {
 149         sp_3dbox_finish(rc);
 150     }
 151
 152     if (ec->shape_knot_holder) {
 153         sp_knot_holder_destroy(ec->shape_knot_holder);
 154         ec->shape_knot_holder = NULL;
 155     }
 156
 157     if (ec->shape_repr) { // remove old listener
 158         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 159         Inkscape::GC::release(ec->shape_repr);
 160         ec->shape_repr = 0;
 161     }
 162
 163     if (rc->_message_context) {
 164         delete rc->_message_context;
 165     }
 166
 167     G_OBJECT_CLASS(parent_class)->dispose(object);
 168 }
 169
 170 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 171     NULL, /* child_added */
 172     NULL, /* child_removed */
 173     ec_shape_event_attr_changed,
 174     NULL, /* content_changed */
 175     NULL  /* order_changed */
 176 };
 177
 178 /**
 179 \brief  Callback that processes the "changed" signal on the selection;
 180 destroys old and creates new knotholder
 181 */
 182 void sp_3dbox_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 183 {
 184     SP3DBoxContext *rc = SP_3DBOX_CONTEXT(data);
 185     SPEventContext *ec = SP_EVENT_CONTEXT(rc);
 186
 187     if (ec->shape_knot_holder) { // destroy knotholder
 188         sp_knot_holder_destroy(ec->shape_knot_holder);
 189         ec->shape_knot_holder = NULL;
 190     }
 191
 192     if (ec->shape_repr) { // remove old listener
 193         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 194         Inkscape::GC::release(ec->shape_repr);
 195         ec->shape_repr = 0;
 196     }
 197
 198     SPItem *item = selection->singleItem();
 199     if (item) {
 200         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 201         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 202         if (shape_repr) {
 203             ec->shape_repr = shape_repr;
 204             Inkscape::GC::anchor(shape_repr);
 205             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 206         }
 207     }
 208 }
 209
 210 static void sp_3dbox_context_setup(SPEventContext *ec)
 211 {
 212     SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec);
 213
 214     if (((SPEventContextClass *) parent_class)->setup) {
 215         ((SPEventContextClass *) parent_class)->setup(ec);
 216     }
 217
 218     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 219     if (item) {
 220         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 221         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 222         if (shape_repr) {
 223             ec->shape_repr = shape_repr;
 224             Inkscape::GC::anchor(shape_repr);
 225             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 226         }
 227     }
 228
 229     rc->sel_changed_connection.disconnect();
 230     rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 231         sigc::bind(sigc::ptr_fun(&sp_3dbox_context_selection_changed), (gpointer)rc)
 232     );
 233
 234     sp_event_context_read(ec, "rx");
 235     sp_event_context_read(ec, "ry");
 236
 237     if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
 238         ec->enableSelectionCue();
 239     }
 240
 241     if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
 242         ec->enableGrDrag();
 243     }
 244
 245     rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 246 }
 247
 248 static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 249 {
 250     SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec);
 251
 252     /* fixme: Proper error handling for non-numeric data.  Use a locale-independent function like
 253      * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */
 254     if ( strcmp(key, "rx") == 0 ) {
 255         rc->rx = ( val
 256                          ? g_ascii_strtod (val, NULL)
 257                          : 0.0 );
 258     } else if ( strcmp(key, "ry") == 0 ) {
 259         rc->ry = ( val
 260                          ? g_ascii_strtod (val, NULL)
 261                          : 0.0 );
 262     }
 263 }
 264
 265 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 266 {
 267     SPDesktop *desktop = event_context->desktop;
 268
 269     gint ret = FALSE;
 270
 271     switch (event->type) {
 272     case GDK_BUTTON_PRESS:
 273         if ( event->button.button == 1 && !event_context->space_panning) {
 274             Inkscape::setup_for_drag_start(desktop, event_context, event);
 275             ret = TRUE;
 276         }
 277         break;
 278         // motion and release are always on root (why?)
 279     default:
 280         break;
 281     }
 282
 283     if (((SPEventContextClass *) parent_class)->item_handler) {
 284         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 285     }
 286
 287     return ret;
 288 }
 289
 290 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 291 {
 292     static bool dragging;
 293
 294     SPDesktop *desktop = event_context->desktop;
 295     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 296
 297     SP3DBoxContext *rc = SP_3DBOX_CONTEXT(event_context);
 298
 299     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 300
 301     gint ret = FALSE;
 302     switch (event->type) {
 303     case GDK_BUTTON_PRESS:
 304         if ( event->button.button == 1  && !event_context->space_panning) {
 305             NR::Point const button_w(event->button.x,
 306                                      event->button.y);
 307
 308             // save drag origin
 309             event_context->xp = (gint) button_w[NR::X];
 310             event_context->yp = (gint) button_w[NR::Y];
 311             event_context->within_tolerance = true;
 312
 313             // remember clicked item, disregarding groups, honoring Alt
 314             event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, event->button.state & GDK_CONTROL_MASK);
 315
 316             dragging = true;
 317
 318             /* Position center */
 319             NR::Point const button_dt(desktop->w2d(button_w));
 320             rc->drag_origin = button_dt;
 321             rc->drag_ptB = button_dt;
 322             rc->drag_ptC = button_dt;
 323
 324             /* Snap center */
 325             SnapManager const &m = desktop->namedview->snap_manager;
 326             rc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE | Inkscape::Snapper::SNAPPOINT_BBOX,
 327                                     button_dt, rc->item).getPoint();
 328
 329             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 330                                 ( GDK_KEY_PRESS_MASK |
 331                                   GDK_BUTTON_RELEASE_MASK       |
 332                                   GDK_POINTER_MOTION_MASK       |
 333                                   GDK_BUTTON_PRESS_MASK ),
 334                                 NULL, event->button.time);
 335             ret = TRUE;
 336         }
 337         break;
 338     case GDK_MOTION_NOTIFY:
 339         if ( dragging
 340              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 341         {
 342             if ( event_context->within_tolerance
 343                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 344                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 345                 break; // do not drag if we're within tolerance from origin
 346             }
 347             // Once the user has moved farther than tolerance from the original location
 348             // (indicating they intend to draw, not click), then always process the
 349             // motion notify coordinates as given (no snapping back to origin)
 350             event_context->within_tolerance = false;
 351
 352             NR::Point const motion_w(event->motion.x,
 353                                      event->motion.y);
 354             NR::Point motion_dt(desktop->w2d(motion_w));
 355
 356             SnapManager const &m = desktop->namedview->snap_manager;
 357             motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_BBOX | Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, rc->item).getPoint();
 358
 359             rc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 360
 361             if (event->motion.state & GDK_SHIFT_MASK && !rc->extruded) {
 362                 /* once shift is pressed, set rc->extruded (no need to create further faces;
 363                    all of them are already created in sp_3dbox_init) */
 364                 rc->extruded = true;
 365             }
 366
 367             if (!rc->extruded) {
 368                 rc->drag_ptB = motion_dt;
 369                 rc->drag_ptC = motion_dt;
 370             } else {
 371                 // Without Ctrl, motion of the extruded corner is constrained to the
 372                 // perspective line from drag_ptB to vanishing point Y.
 373                 if (!rc->ctrl_dragged) {
 374                         rc->drag_ptC = Box3D::perspective_line_snap (rc->drag_ptB, Box3D::Z, motion_dt);
 375                 } else {
 376                     rc->drag_ptC = motion_dt;
 377                 }
 378                 rc->drag_ptC = m.freeSnap(Inkscape::Snapper::SNAPPOINT_BBOX | Inkscape::Snapper::SNAPPOINT_NODE, rc->drag_ptC, rc->item).getPoint();
 379                 if (rc->ctrl_dragged) {
 380                         Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y);
 381                         Box3D::PerspectiveLine pl2 (rc->drag_ptB, Box3D::X);
 382                         NR::Point corner1 = pl1.meet(pl2);
 383
 384                         Box3D::PerspectiveLine pl3 (corner1, Box3D::X);
 385                         Box3D::PerspectiveLine pl4 (rc->drag_ptC, Box3D::Z);
 386                         rc->drag_ptB = pl3.meet(pl4);
 387                 }
 388             }
 389
 390
 391             sp_3dbox_drag(*rc, event->motion.state);
 392
 393             ret = TRUE;
 394         }
 395         break;
 396     case GDK_BUTTON_RELEASE:
 397         event_context->xp = event_context->yp = 0;
 398         if ( event->button.button == 1  && !event_context->space_panning) {
 399             dragging = false;
 400
 401             if (!event_context->within_tolerance) {
 402                 // we've been dragging, finish the box
 403                 sp_3dbox_finish(rc);
 404             } else if (event_context->item_to_select) {
 405                 // no dragging, select clicked item if any
 406                 if (event->button.state & GDK_SHIFT_MASK) {
 407                     selection->toggle(event_context->item_to_select);
 408                 } else {
 409                     selection->set(event_context->item_to_select);
 410                 }
 411             } else {
 412                 // click in an empty space
 413                 selection->clear();
 414             }
 415
 416             event_context->item_to_select = NULL;
 417             ret = TRUE;
 418             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 419                                   event->button.time);
 420         }
 421         break;
 422     case GDK_KEY_PRESS:
 423         switch (get_group0_keyval (&event->key)) {
 424         case GDK_Alt_L:
 425         case GDK_Alt_R:
 426         case GDK_Control_L:
 427         case GDK_Control_R:
 428         case GDK_Shift_L:
 429         case GDK_Shift_R:
 430         case GDK_Meta_L:  // Meta is when you press Shift+Alt (at least on my machine)
 431         case GDK_Meta_R:
 432             /***
 433             if (!dragging){
 434                 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
 435                                             _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
 436                                             _("<b>Shift</b>: draw around the starting point"),
 437                                             NULL);
 438             }
 439             ***/
 440             break;
 441         case GDK_Up:
 442         case GDK_Down:
 443         case GDK_KP_Up:
 444         case GDK_KP_Down:
 445             // prevent the zoom field from activation
 446             if (!MOD__CTRL_ONLY)
 447                 ret = TRUE;
 448             break;
 449
 450         case GDK_x:
 451         case GDK_X:
 452             if (MOD__ALT_ONLY) {
 453                 // desktop->setToolboxFocusTo ("altx-rect");
 454                 ret = TRUE;
 455             }
 456             break;
 457
 458         case GDK_Escape:
 459             sp_desktop_selection(desktop)->clear();
 460             //TODO: make dragging escapable by Esc
 461             break;
 462
 463         case GDK_space:
 464             if (dragging) {
 465                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 466                                       event->button.time);
 467                 dragging = false;
 468                 if (!event_context->within_tolerance) {
 469                     // we've been dragging, finish the box
 470                     sp_3dbox_finish(rc);
 471                 }
 472                 // do not return true, so that space would work switching to selector
 473             }
 474             break;
 475
 476         default:
 477             break;
 478         }
 479         break;
 480     case GDK_KEY_RELEASE:
 481         switch (get_group0_keyval (&event->key)) {
 482         case GDK_Alt_L:
 483         case GDK_Alt_R:
 484         case GDK_Control_L:
 485         case GDK_Control_R:
 486         case GDK_Shift_L:
 487         case GDK_Shift_R:
 488         case GDK_Meta_L:  // Meta is when you press Shift+Alt
 489         case GDK_Meta_R:
 490             event_context->defaultMessageContext()->clear();
 491             break;
 492         default:
 493             break;
 494         }
 495         break;
 496     default:
 497         break;
 498     }
 499
 500     if (!ret) {
 501         if (((SPEventContextClass *) parent_class)->root_handler) {
 502             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 503         }
 504     }
 505
 506     return ret;
 507 }
 508
 509 static void sp_3dbox_drag(SP3DBoxContext &bc, guint state)
 510 {
 511     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 512
 513     if (!bc.item) {
 514
 515         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 516             return;
 517         }
 518
 519         /* Create object */
 520         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 521         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 522         repr->setAttribute("sodipodi:type", "inkscape:3dbox");
 523
 524         /* Set style */
 525         sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
 526
 527         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 528         Inkscape::GC::release(repr);
 529         bc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
 530
 531         /* Hook paths to the faces of the box */
 532         for (int i = 0; i < 6; ++i) {
 533             SP_3DBOX(bc.item)->faces[i]->hook_path_to_3dbox();
 534         }
 535
 536         bc.item->updateRepr();
 537
 538         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 539     }
 540
 541     // FIXME: remove these extra points
 542     NR::Point pt = bc.drag_ptB;
 543     NR::Point shift_pt = bc.drag_ptC;
 544
 545     NR::Rect r;
 546     if (!(state & GDK_SHIFT_MASK)) {
 547         r = Inkscape::snap_rectangular_box(desktop, bc.item, pt, bc.center, state);
 548     } else {
 549         r = Inkscape::snap_rectangular_box(desktop, bc.item, shift_pt, bc.center, state);
 550     }
 551
 552     SPEventContext *ec = SP_EVENT_CONTEXT(&bc);
 553     NR::Point origin_w(ec->xp, ec->yp);
 554     NR::Point origin(desktop->w2d(origin_w));
 555     sp_3dbox_position_set(bc);
 556
 557     // status text
 558     //GString *Ax = SP_PX_TO_METRIC_STRING(origin[NR::X], desktop->namedview->getDefaultMetric());
 559     //GString *Ay = SP_PX_TO_METRIC_STRING(origin[NR::Y], desktop->namedview->getDefaultMetric());
 560     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 561     //g_string_free(Ax, FALSE);
 562     //g_string_free(Ay, FALSE);
 563 }
 564
 565 static void sp_3dbox_finish(SP3DBoxContext *rc)
 566 {
 567     rc->_message_context->clear();
 568
 569     if ( rc->item != NULL ) {
 570         SPDesktop * desktop;
 571
 572         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
 573
 574         SP_OBJECT(rc->item)->updateRepr();
 575
 576         sp_canvas_end_forced_full_redraws(desktop->canvas);
 577
 578         sp_desktop_selection(desktop)->set(rc->item);
 579         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 580                          _("Create 3D box"));
 581
 582         rc->item = NULL;
 583     }
 584
 585     rc->ctrl_dragged = false;
 586     rc->extruded = false;
 587 }
 588
 589 /*
 590   Local Variables:
 591   mode:c++
 592   c-file-style:"stroustrup"
 593   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 594   indent-tabs-mode:nil
 595   fill-column:99
 596   End:
 597 */
 598 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :