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Monster commit. New grid infrastructure. The old gridmanagement code is still there...
[inkscape.git] / src / text-context.cpp
1 #define __SP_TEXT_CONTEXT_C__
3 /*
4  * SPTextContext
5  *
6  * Authors:
7  *   Lauris Kaplinski <lauris@kaplinski.com>
8  *   bulia byak <buliabyak@users.sf.net>
9  *
10  * Copyright (C) 1999-2005 authors
11  * Copyright (C) 2001 Ximian, Inc.
12  *
13  * Released under GNU GPL, read the file 'COPYING' for more information
14  */
16 #ifdef HAVE_CONFIG_H
17 # include <config.h>
18 #endif
20 #include <gdk/gdkkeysyms.h>
21 #include <gtk/gtkmain.h>
22 #include <display/sp-ctrlline.h>
23 #include <display/sodipodi-ctrlrect.h>
24 #include <display/sp-ctrlquadr.h>
25 #include <gtk/gtkimmulticontext.h>
26 #include <gtkmm/clipboard.h>
28 #include "macros.h"
29 #include "sp-text.h"
30 #include "sp-flowtext.h"
31 #include "document.h"
32 #include "sp-namedview.h"
33 #include "style.h"
34 #include "selection.h"
35 #include "desktop.h"
36 #include "desktop-style.h"
37 #include "desktop-handles.h"
38 #include "desktop-affine.h"
39 #include "message-stack.h"
40 #include "message-context.h"
41 #include "pixmaps/cursor-text.xpm"
42 #include "pixmaps/cursor-text-insert.xpm"
43 #include <glibmm/i18n.h>
44 #include "object-edit.h"
45 #include "xml/repr.h"
46 #include "xml/node-event-vector.h"
47 #include "prefs-utils.h"
48 #include "rubberband.h"
49 #include "sp-metrics.h"
50 #include "context-fns.h"
51 #include "verbs.h"
53 #include "text-editing.h"
55 #include "text-context.h"
58 static void sp_text_context_class_init(SPTextContextClass *klass);
59 static void sp_text_context_init(SPTextContext *text_context);
60 static void sp_text_context_dispose(GObject *obj);
62 static void sp_text_context_setup(SPEventContext *ec);
63 static void sp_text_context_finish(SPEventContext *ec);
64 static gint sp_text_context_root_handler(SPEventContext *event_context, GdkEvent *event);
65 static gint sp_text_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
67 static void sp_text_context_selection_changed(Inkscape::Selection *selection, SPTextContext *tc);
68 static void sp_text_context_selection_modified(Inkscape::Selection *selection, guint flags, SPTextContext *tc);
69 static bool sp_text_context_style_set(SPCSSAttr const *css, SPTextContext *tc);
70 static int sp_text_context_style_query(SPStyle *style, int property, SPTextContext *tc);
72 static void sp_text_context_validate_cursor_iterators(SPTextContext *tc);
73 static void sp_text_context_update_cursor(SPTextContext *tc, bool scroll_to_see = true);
74 static void sp_text_context_update_text_selection(SPTextContext *tc);
75 static gint sp_text_context_timeout(SPTextContext *tc);
76 static void sp_text_context_forget_text(SPTextContext *tc);
78 static gint sptc_focus_in(GtkWidget *widget, GdkEventFocus *event, SPTextContext *tc);
79 static gint sptc_focus_out(GtkWidget *widget, GdkEventFocus *event, SPTextContext *tc);
80 static void sptc_commit(GtkIMContext *imc, gchar *string, SPTextContext *tc);
82 static SPEventContextClass *parent_class;
84 GType
85 sp_text_context_get_type()
86 {
87     static GType type = 0;
88     if (!type) {
89         GTypeInfo info = {
90             sizeof(SPTextContextClass),
91             NULL, NULL,
92             (GClassInitFunc) sp_text_context_class_init,
93             NULL, NULL,
94             sizeof(SPTextContext),
95             4,
96             (GInstanceInitFunc) sp_text_context_init,
97             NULL,   /* value_table */
98         };
99         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTextContext", &info, (GTypeFlags)0);
100     }
101     return type;
104 static void
105 sp_text_context_class_init(SPTextContextClass *klass)
107     GObjectClass *object_class=(GObjectClass *)klass;
108     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
110     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
112     object_class->dispose = sp_text_context_dispose;
114     event_context_class->setup = sp_text_context_setup;
115     event_context_class->finish = sp_text_context_finish;
116     event_context_class->root_handler = sp_text_context_root_handler;
117     event_context_class->item_handler = sp_text_context_item_handler;
120 static void
121 sp_text_context_init(SPTextContext *tc)
123     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
125     event_context->cursor_shape = cursor_text_xpm;
126     event_context->hot_x = 7;
127     event_context->hot_y = 7;
129     event_context->xp = 0;
130     event_context->yp = 0;
131     event_context->tolerance = 0;
132     event_context->within_tolerance = false;
134     event_context->shape_repr = NULL;
135     event_context->shape_knot_holder = NULL;
137     tc->imc = NULL;
139     tc->text = NULL;
140     tc->pdoc = NR::Point(0, 0);
141     new (&tc->text_sel_start) Inkscape::Text::Layout::iterator();
142     new (&tc->text_sel_end) Inkscape::Text::Layout::iterator();
143     new (&tc->text_selection_quads) std::vector<SPCanvasItem*>();
145     tc->unimode = false;
147     tc->cursor = NULL;
148     tc->indicator = NULL;
149     tc->frame = NULL;
150     tc->grabbed = NULL;
151     tc->timeout = 0;
152     tc->show = FALSE;
153     tc->phase = 0;
154     tc->nascent_object = 0;
155     tc->over_text = 0;
156     tc->dragging = 0;
157     tc->creating = 0;
159     new (&tc->sel_changed_connection) sigc::connection();
160     new (&tc->sel_modified_connection) sigc::connection();
161     new (&tc->style_set_connection) sigc::connection();
162     new (&tc->style_query_connection) sigc::connection();
165 static void
166 sp_text_context_dispose(GObject *obj)
168     SPTextContext *tc = SP_TEXT_CONTEXT(obj);
169     SPEventContext *ec = SP_EVENT_CONTEXT(tc);
170     tc->style_query_connection.~connection();
171     tc->style_set_connection.~connection();
172     tc->sel_changed_connection.~connection();
173     tc->sel_modified_connection.~connection();
174     tc->text_sel_end.~iterator();
175     tc->text_sel_start.~iterator();
176     tc->text_selection_quads.~vector();
177     if (G_OBJECT_CLASS(parent_class)->dispose) {
178         G_OBJECT_CLASS(parent_class)->dispose(obj);
179     }
180     if (tc->grabbed) {
181         sp_canvas_item_ungrab(tc->grabbed, GDK_CURRENT_TIME);
182         tc->grabbed = NULL;
183     }
185     Inkscape::Rubberband::get()->stop();
187     if (ec->shape_knot_holder) {
188         sp_knot_holder_destroy(ec->shape_knot_holder);
189         ec->shape_knot_holder = NULL;
190     }
191     if (ec->shape_repr) { // remove old listener
192         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
193         Inkscape::GC::release(ec->shape_repr);
194         ec->shape_repr = 0;
195     }
198 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
199     NULL, /* child_added */
200     NULL, /* child_removed */
201     ec_shape_event_attr_changed,
202     NULL, /* content_changed */
203     NULL  /* order_changed */
204 };
206 static void
207 sp_text_context_setup(SPEventContext *ec)
209     SPTextContext *tc = SP_TEXT_CONTEXT(ec);
210     SPDesktop *desktop = ec->desktop;
212     tc->cursor = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLLINE, NULL);
213     sp_ctrlline_set_coords(SP_CTRLLINE(tc->cursor), 100, 0, 100, 100);
214     sp_ctrlline_set_rgba32(SP_CTRLLINE(tc->cursor), 0x000000ff);
215     sp_canvas_item_hide(tc->cursor);
217     tc->indicator = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLRECT, NULL);
218     SP_CTRLRECT(tc->indicator)->setRectangle(NR::Rect(NR::Point(0, 0), NR::Point(100, 100)));
219     SP_CTRLRECT(tc->indicator)->setColor(0x0000ff7f, false, 0);
220     sp_canvas_item_hide(tc->indicator);
222     tc->frame = sp_canvas_item_new(sp_desktop_controls(desktop), SP_TYPE_CTRLRECT, NULL);
223     SP_CTRLRECT(tc->frame)->setRectangle(NR::Rect(NR::Point(0, 0), NR::Point(100, 100)));
224     SP_CTRLRECT(tc->frame)->setColor(0x0000ff7f, false, 0);
225     sp_canvas_item_hide(tc->frame);
227     tc->timeout = gtk_timeout_add(250, (GtkFunction) sp_text_context_timeout, ec);
229     tc->imc = gtk_im_multicontext_new();
230     if (tc->imc) {
231         GtkWidget *canvas = GTK_WIDGET(sp_desktop_canvas(desktop));
233         /* im preedit handling is very broken in inkscape for
234          * multi-byte characters.  See bug 1086769.
235          * We need to let the IM handle the preediting, and
236          * just take in the characters when they're finished being
237          * entered.
238          */
239         gtk_im_context_set_use_preedit(tc->imc, FALSE);
240         gtk_im_context_set_client_window(tc->imc, canvas->window);
242         g_signal_connect(G_OBJECT(canvas), "focus_in_event", G_CALLBACK(sptc_focus_in), tc);
243         g_signal_connect(G_OBJECT(canvas), "focus_out_event", G_CALLBACK(sptc_focus_out), tc);
244         g_signal_connect(G_OBJECT(tc->imc), "commit", G_CALLBACK(sptc_commit), tc);
246         if (GTK_WIDGET_HAS_FOCUS(canvas)) {
247             sptc_focus_in(canvas, NULL, tc);
248         }
249     }
251     if (((SPEventContextClass *) parent_class)->setup)
252         ((SPEventContextClass *) parent_class)->setup(ec);
254     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
255     if (item && SP_IS_FLOWTEXT (item) && SP_FLOWTEXT(item)->has_internal_frame()) {
256         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
257         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(SP_FLOWTEXT(item)->get_frame(NULL));
258         if (shape_repr) {
259             ec->shape_repr = shape_repr;
260             Inkscape::GC::anchor(shape_repr);
261             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
262         }
263     }
265     tc->sel_changed_connection = sp_desktop_selection(desktop)->connectChanged(
266         sigc::bind(sigc::ptr_fun(&sp_text_context_selection_changed), tc)
267         );
268     tc->sel_modified_connection = sp_desktop_selection(desktop)->connectModified(
269         sigc::bind(sigc::ptr_fun(&sp_text_context_selection_modified), tc)
270         );
271     tc->style_set_connection = desktop->connectSetStyle(
272         sigc::bind(sigc::ptr_fun(&sp_text_context_style_set), tc)
273         );
274     tc->style_query_connection = desktop->connectQueryStyle(
275         sigc::bind(sigc::ptr_fun(&sp_text_context_style_query), tc)
276         );
278     sp_text_context_selection_changed(sp_desktop_selection(desktop), tc);
280     if (prefs_get_int_attribute("tools.text", "selcue", 0) != 0) {
281         ec->enableSelectionCue();
282     }
283     if (prefs_get_int_attribute("tools.text", "gradientdrag", 0) != 0) {
284         ec->enableGrDrag();
285     }
288 static void
289 sp_text_context_finish(SPEventContext *ec)
291     SPTextContext *tc = SP_TEXT_CONTEXT(ec);
293     if (ec->desktop) {
294         sp_signal_disconnect_by_data(sp_desktop_canvas(ec->desktop), tc);
295     }
297     ec->enableGrDrag(false);
299     tc->style_set_connection.disconnect();
300     tc->style_query_connection.disconnect();
301     tc->sel_changed_connection.disconnect();
302     tc->sel_modified_connection.disconnect();
304     sp_text_context_forget_text(SP_TEXT_CONTEXT(ec));
306     if (tc->imc) {
307         g_object_unref(G_OBJECT(tc->imc));
308         tc->imc = NULL;
309     }
311     if (tc->timeout) {
312         gtk_timeout_remove(tc->timeout);
313         tc->timeout = 0;
314     }
316     if (tc->cursor) {
317         gtk_object_destroy(GTK_OBJECT(tc->cursor));
318         tc->cursor = NULL;
319     }
321     if (tc->indicator) {
322         gtk_object_destroy(GTK_OBJECT(tc->indicator));
323         tc->indicator = NULL;
324     }
326     if (tc->frame) {
327         gtk_object_destroy(GTK_OBJECT(tc->frame));
328         tc->frame = NULL;
329     }
331     for (std::vector<SPCanvasItem*>::iterator it = tc->text_selection_quads.begin() ;
332          it != tc->text_selection_quads.end() ; ++it) {
333         sp_canvas_item_hide(*it);
334         gtk_object_destroy(*it);
335     }
336     tc->text_selection_quads.clear();
340 static gint
341 sp_text_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
343     SPTextContext *tc = SP_TEXT_CONTEXT(ec);
344     SPDesktop *desktop = ec->desktop;
345     SPItem *item_ungrouped;
347     gint ret = FALSE;
349     sp_text_context_validate_cursor_iterators(tc);
351     switch (event->type) {
352         case GDK_BUTTON_PRESS:
353             if (event->button.button == 1) {
354                 // find out clicked item, disregarding groups
355                 item_ungrouped = desktop->item_at_point(NR::Point(event->button.x, event->button.y), TRUE);
356                 if (SP_IS_TEXT(item_ungrouped) || SP_IS_FLOWTEXT(item_ungrouped)) {
357                     sp_desktop_selection(ec->desktop)->set(item_ungrouped);
358                     if (tc->text) {
359                         // find out click point in document coordinates
360                         NR::Point p = ec->desktop->w2d(NR::Point(event->button.x, event->button.y));
361                         // set the cursor closest to that point
362                         tc->text_sel_start = tc->text_sel_end = sp_te_get_position_by_coords(tc->text, p);
363                         // update display
364                         sp_text_context_update_cursor(tc);
365                         sp_text_context_update_text_selection(tc);
366                         tc->dragging = 1;
367                     }
368                     ret = TRUE;
369                 }
370             }
371             break;
372         case GDK_2BUTTON_PRESS:
373             if (event->button.button == 1 && tc->text) {
374                 Inkscape::Text::Layout const *layout = te_get_layout(tc->text);
375                 if (layout) {
376                     if (!layout->isStartOfWord(tc->text_sel_start))
377                         tc->text_sel_start.prevStartOfWord();
378                     if (!layout->isEndOfWord(tc->text_sel_end))
379                         tc->text_sel_end.nextEndOfWord();
380                     sp_text_context_update_cursor(tc);
381                     sp_text_context_update_text_selection(tc);
382                     tc->dragging = 2;
383                     ret = TRUE;
384                 }
385             }
386             break;
387         case GDK_3BUTTON_PRESS:
388             if (event->button.button == 1 && tc->text) {
389                 tc->text_sel_start.thisStartOfLine();
390                 tc->text_sel_end.thisEndOfLine();
391                 sp_text_context_update_cursor(tc);
392                 sp_text_context_update_text_selection(tc);
393                 tc->dragging = 3;
394                 ret = TRUE;
395             }
396             break;
397         case GDK_BUTTON_RELEASE:
398             if (event->button.button == 1 && tc->dragging) {
399                 tc->dragging = 0;
400                 ret = TRUE;
401             }
402             break;
403         case GDK_MOTION_NOTIFY:
404             if (event->motion.state & GDK_BUTTON1_MASK && tc->dragging) {
405                 Inkscape::Text::Layout const *layout = te_get_layout(tc->text);
406                 if (!layout) break;
407                 // find out click point in document coordinates
408                 NR::Point p = ec->desktop->w2d(NR::Point(event->button.x, event->button.y));
409                 // set the cursor closest to that point
410                 Inkscape::Text::Layout::iterator new_end = sp_te_get_position_by_coords(tc->text, p);
411                 if (tc->dragging == 2) {
412                     // double-click dragging: go by word
413                     if (new_end < tc->text_sel_start) {
414                         if (!layout->isStartOfWord(new_end))
415                             new_end.prevStartOfWord();
416                     } else
417                         if (!layout->isEndOfWord(new_end))
418                             new_end.nextEndOfWord();
419                 } else if (tc->dragging == 3) {
420                     // triple-click dragging: go by line
421                     if (new_end < tc->text_sel_start)
422                         new_end.thisStartOfLine();
423                     else
424                         new_end.thisEndOfLine();
425                 }
426                 // update display
427                 if (tc->text_sel_end != new_end) {
428                     tc->text_sel_end = new_end;
429                     sp_text_context_update_cursor(tc);
430                     sp_text_context_update_text_selection(tc);
431                 }
432                 ret = TRUE;
433                 break;
434             }
435             // find out item under mouse, disregarding groups
436             item_ungrouped = desktop->item_at_point(NR::Point(event->button.x, event->button.y), TRUE);
437             if (SP_IS_TEXT(item_ungrouped) || SP_IS_FLOWTEXT(item_ungrouped)) {
438                 sp_canvas_item_show(tc->indicator);
439                 NR::Maybe<NR::Rect> ibbox = sp_item_bbox_desktop(item_ungrouped);
440                 if (ibbox) {
441                     SP_CTRLRECT(tc->indicator)->setRectangle(*ibbox);
442                 }
444                 ec->cursor_shape = cursor_text_insert_xpm;
445                 ec->hot_x = 7;
446                 ec->hot_y = 10;
447                 sp_event_context_update_cursor(ec);
448                 sp_text_context_update_text_selection(tc);
450                 if (SP_IS_TEXT (item_ungrouped)) {
451                     desktop->event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> to edit the text, <b>drag</b> to select part of the text."));
452                 } else {
453                     desktop->event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> to edit the flowed text, <b>drag</b> to select part of the text."));
454                 }
456                 tc->over_text = true;
458                 ret = TRUE;
459             }
460             break;
461         default:
462             break;
463     }
465     if (!ret) {
466         if (((SPEventContextClass *) parent_class)->item_handler)
467             ret = ((SPEventContextClass *) parent_class)->item_handler(ec, item, event);
468     }
470     return ret;
473 static void
474 sp_text_context_setup_text(SPTextContext *tc)
476     SPEventContext *ec = SP_EVENT_CONTEXT(tc);
478     /* Create <text> */
479     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DESKTOP(ec)->doc());
480     Inkscape::XML::Node *rtext = xml_doc->createElement("svg:text");
481     rtext->setAttribute("xml:space", "preserve"); // we preserve spaces in the text objects we create
483     /* Set style */
484     sp_desktop_apply_style_tool(SP_EVENT_CONTEXT_DESKTOP(ec), rtext, "tools.text", true);
486     sp_repr_set_svg_double(rtext, "x", tc->pdoc[NR::X]);
487     sp_repr_set_svg_double(rtext, "y", tc->pdoc[NR::Y]);
489     /* Create <tspan> */
490     Inkscape::XML::Node *rtspan = xml_doc->createElement("svg:tspan");
491     rtspan->setAttribute("sodipodi:role", "line"); // otherwise, why bother creating the tspan?
492     rtext->addChild(rtspan, NULL);
493     Inkscape::GC::release(rtspan);
495     /* Create TEXT */
496     Inkscape::XML::Node *rstring = xml_doc->createTextNode("");
497     rtspan->addChild(rstring, NULL);
498     Inkscape::GC::release(rstring);
499     SPItem *text_item = SP_ITEM(ec->desktop->currentLayer()->appendChildRepr(rtext));
500     /* fixme: Is selection::changed really immediate? */
501     /* yes, it's immediate .. why does it matter? */
502     sp_desktop_selection(ec->desktop)->set(text_item);
503     Inkscape::GC::release(rtext);
504     text_item->transform = SP_ITEM(ec->desktop->currentRoot())->getRelativeTransform(ec->desktop->currentLayer());
505     text_item->updateRepr();
506     sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
507                      _("Create text"));
510 /**
511  * Insert the character indicated by tc.uni to replace the current selection,
512  * and reset tc.uni/tc.unipos to empty string.
513  *
514  * \pre tc.uni/tc.unipos non-empty.
515  */
516 static void
517 insert_uni_char(SPTextContext *const tc)
519     g_return_if_fail(tc->unipos
520                      && tc->unipos < sizeof(tc->uni)
521                      && tc->uni[tc->unipos] == '\0');
522     unsigned int uv;
523     sscanf(tc->uni, "%x", &uv);
524     tc->unipos = 0;
525     tc->uni[tc->unipos] = '\0';
527     if ( !g_unichar_isprint(static_cast<gunichar>(uv))
528          && !(g_unichar_validate(static_cast<gunichar>(uv)) && (g_unichar_type(static_cast<gunichar>(uv)) == G_UNICODE_PRIVATE_USE) ) ) {
529         // This may be due to bad input, so it goes to statusbar.
530         tc->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE,
531                                            _("Non-printable character"));
532     } else {
533         if (!tc->text) { // printable key; create text if none (i.e. if nascent_object)
534             sp_text_context_setup_text(tc);
535             tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
536         }
538         gchar u[10];
539         guint const len = g_unichar_to_utf8(uv, u);
540         u[len] = '\0';
542         tc->text_sel_start = tc->text_sel_end = sp_te_replace(tc->text, tc->text_sel_start, tc->text_sel_end, u);
543         sp_text_context_update_cursor(tc);
544         sp_text_context_update_text_selection(tc);
545         sp_document_done(sp_desktop_document(tc->desktop), SP_VERB_DIALOG_TRANSFORM, 
546                          _("Insert Unicode character"));
547     }
550 static void
551 hex_to_printable_utf8_buf(char const *const hex, char *utf8)
553     unsigned int uv;
554     sscanf(hex, "%x", &uv);
555     if (!g_unichar_isprint((gunichar) uv)) {
556         uv = 0xfffd;
557     }
558     guint const len = g_unichar_to_utf8(uv, utf8);
559     utf8[len] = '\0';
562 static void
563 show_curr_uni_char(SPTextContext *const tc)
565     g_return_if_fail(tc->unipos < sizeof(tc->uni)
566                      && tc->uni[tc->unipos] == '\0');
567     if (tc->unipos) {
568         char utf8[10];
569         hex_to_printable_utf8_buf(tc->uni, utf8);
571         /* Status bar messages are in pango markup, so we need xml escaping. */
572         if (utf8[1] == '\0') {
573             switch(utf8[0]) {
574                 case '<': strcpy(utf8, "&lt;"); break;
575                 case '>': strcpy(utf8, "&gt;"); break;
576                 case '&': strcpy(utf8, "&amp;"); break;
577                 default: break;
578             }
579         }
580         tc->defaultMessageContext()->setF(Inkscape::NORMAL_MESSAGE,
581                                           _("Unicode (<b>Enter</b> to finish): %s: %s"), tc->uni, utf8);
582     } else {
583         tc->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("Unicode (<b>Enter</b> to finish): "));
584     }
587 static gint
588 sp_text_context_root_handler(SPEventContext *const ec, GdkEvent *const event)
590     SPTextContext *const tc = SP_TEXT_CONTEXT(ec);
592     SPDesktop *desktop = ec->desktop;
594     sp_canvas_item_hide(tc->indicator);
596     sp_text_context_validate_cursor_iterators(tc);
598     ec->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
600     switch (event->type) {
601         case GDK_BUTTON_PRESS:
602             if (event->button.button == 1) {
604                 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);
606                 if (Inkscape::have_viable_layer(desktop, desktop->messageStack()) == false) {
607                     return TRUE;
608                 }
610                 // save drag origin
611                 ec->xp = (gint) event->button.x;
612                 ec->yp = (gint) event->button.y;
613                 ec->within_tolerance = true;
615                 NR::Point const button_pt(event->button.x, event->button.y);
616                 tc->p0 = desktop->w2d(button_pt);
617                 Inkscape::Rubberband::get()->start(desktop, tc->p0);
618                 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
619                                     GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
620                                         GDK_POINTER_MOTION_MASK,
621                                     NULL, event->button.time);
622                 tc->grabbed = SP_CANVAS_ITEM(desktop->acetate);
623                 tc->creating = 1;
625                 /* Processed */
626                 return TRUE;
627             }
628             break;
629         case GDK_MOTION_NOTIFY:
630             if (tc->over_text) {
631                 tc->over_text = 0;
632                 // update cursor and statusbar: we are not over a text object now
633                 ec->cursor_shape = cursor_text_xpm;
634                 ec->hot_x = 7;
635                 ec->hot_y = 7;
636                 sp_event_context_update_cursor(ec);
637                 desktop->event_context->defaultMessageContext()->clear();
638             }
640             if (tc->creating && event->motion.state & GDK_BUTTON1_MASK) {
641                 if ( ec->within_tolerance
642                      && ( abs( (gint) event->motion.x - ec->xp ) < ec->tolerance )
643                      && ( abs( (gint) event->motion.y - ec->yp ) < ec->tolerance ) ) {
644                     break; // do not drag if we're within tolerance from origin
645                 }
646                 // Once the user has moved farther than tolerance from the original location
647                 // (indicating they intend to draw, not click), then always process the
648                 // motion notify coordinates as given (no snapping back to origin)
649                 ec->within_tolerance = false;
651                 NR::Point const motion_pt(event->motion.x, event->motion.y);
652                 NR::Point const p = desktop->w2d(motion_pt);
654                 Inkscape::Rubberband::get()->move(p);
655                 gobble_motion_events(GDK_BUTTON1_MASK);
657                 // status text
658                 GString *xs = SP_PX_TO_METRIC_STRING(fabs((p - tc->p0)[NR::X]), desktop->namedview->getDefaultMetric());
659                 GString *ys = SP_PX_TO_METRIC_STRING(fabs((p - tc->p0)[NR::Y]), desktop->namedview->getDefaultMetric());
660                 ec->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>Flowed text frame</b>: %s &#215; %s"), xs->str, ys->str);
661                 g_string_free(xs, FALSE);
662                 g_string_free(ys, FALSE);
664             }
665             break;
666         case GDK_BUTTON_RELEASE:
667             if (event->button.button == 1) {
669                 if (tc->grabbed) {
670                     sp_canvas_item_ungrab(tc->grabbed, GDK_CURRENT_TIME);
671                     tc->grabbed = NULL;
672                 }
674                 Inkscape::Rubberband::get()->stop();
676                 if (tc->creating && ec->within_tolerance) {
677                     /* Button 1, set X & Y & new item */
678                     sp_desktop_selection(desktop)->clear();
679                     NR::Point dtp = ec->desktop->w2d(NR::Point(event->button.x, event->button.y));
680                     tc->pdoc = sp_desktop_dt2root_xy_point(ec->desktop, dtp);
682                     tc->show = TRUE;
683                     tc->phase = 1;
684                     tc->nascent_object = 1; // new object was just created
686                     /* Cursor */
687                     sp_canvas_item_show(tc->cursor);
688                     // Cursor height is defined by the new text object's font size; it needs to be set
689                     // articifically here, for the text object does not exist yet:
690                     double cursor_height = sp_desktop_get_font_size_tool(ec->desktop);
691                     sp_ctrlline_set_coords(SP_CTRLLINE(tc->cursor), dtp, dtp + NR::Point(0, cursor_height));
692                     ec->_message_context->set(Inkscape::NORMAL_MESSAGE, _("Type text; <b>Enter</b> to start new line.")); // FIXME:: this is a copy of a string from _update_cursor below, do not desync
694                     ec->within_tolerance = false;
695                 } else if (tc->creating) {
696                     NR::Point const button_pt(event->button.x, event->button.y);
697                     NR::Point p1 = desktop->w2d(button_pt);
698                     double cursor_height = sp_desktop_get_font_size_tool(ec->desktop);
699                     if (fabs(p1[NR::Y] - tc->p0[NR::Y]) > cursor_height) {
700                         // otherwise even one line won't fit; most probably a slip of hand (even if bigger than tolerance)
701                         SPItem *ft = create_flowtext_with_internal_frame (desktop, tc->p0, p1);
702                         /* Set style */
703                         sp_desktop_apply_style_tool(SP_EVENT_CONTEXT_DESKTOP(ec), SP_OBJECT_REPR(ft), "tools.text", true);
704                         sp_desktop_selection(desktop)->set(ft);
705                         ec->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Flowed text is created."));
706                         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_TEXT, 
707                                          _("Create flowed text"));
708                     } else {
709                         ec->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("The frame is <b>too small</b> for the current font size. Flowed text not created."));
710                     }
711                 }
712                 tc->creating = false;
713                 return TRUE;
714             }
715             break;
716         case GDK_KEY_PRESS: {
717             guint const group0_keyval = get_group0_keyval(&event->key);
719             if (group0_keyval == GDK_KP_Add ||
720                 group0_keyval == GDK_KP_Subtract) {
721                 if (!(event->key.state & GDK_MOD2_MASK)) // mod2 is NumLock; if on, type +/- keys
722                     break; // otherwise pass on keypad +/- so they can zoom
723             }
725             if ((tc->text) || (tc->nascent_object)) {
726                 // there is an active text object in this context, or a new object was just created
728                 if (tc->unimode || !tc->imc
729                     || (MOD__CTRL && MOD__SHIFT)    // input methods tend to steal this for unimode,
730                                                     // but we have our own so make sure they don't swallow it
731                     || !gtk_im_context_filter_keypress(tc->imc, (GdkEventKey*) event)) {
732                     //IM did not consume the key, or we're in unimode
734                         if (!MOD__CTRL_ONLY && tc->unimode) {
735                             /* TODO: ISO 14755 (section 3 Definitions) says that we should also
736                                accept the first 6 characters of alphabets other than the latin
737                                alphabet "if the Latin alphabet is not used".  The below is also
738                                reasonable (viz. hope that the user's keyboard includes latin
739                                characters and force latin interpretation -- just as we do for our
740                                keyboard shortcuts), but differs from the ISO 14755
741                                recommendation. */
742                             switch (group0_keyval) {
743                                 case GDK_space:
744                                 case GDK_KP_Space: {
745                                     if (tc->unipos) {
746                                         insert_uni_char(tc);
747                                     }
748                                     /* Stay in unimode. */
749                                     show_curr_uni_char(tc);
750                                     return TRUE;
751                                 }
753                                 case GDK_BackSpace: {
754                                     g_return_val_if_fail(tc->unipos < sizeof(tc->uni), TRUE);
755                                     if (tc->unipos) {
756                                         tc->uni[--tc->unipos] = '\0';
757                                     }
758                                     show_curr_uni_char(tc);
759                                     return TRUE;
760                                 }
762                                 case GDK_Return:
763                                 case GDK_KP_Enter: {
764                                     if (tc->unipos) {
765                                         insert_uni_char(tc);
766                                     }
767                                     /* Exit unimode. */
768                                     tc->unimode = false;
769                                     ec->defaultMessageContext()->clear();
770                                     return TRUE;
771                                 }
773                                 case GDK_Escape: {
774                                     // Cancel unimode.
775                                     tc->unimode = false;
776                                     gtk_im_context_reset(tc->imc);
777                                     ec->defaultMessageContext()->clear();
778                                     return TRUE;
779                                 }
781                                 case GDK_Shift_L:
782                                 case GDK_Shift_R:
783                                     break;
785                                 default: {
786                                     if (g_ascii_isxdigit(group0_keyval)) {
787                                         g_return_val_if_fail(tc->unipos < sizeof(tc->uni) - 1, TRUE);
788                                         tc->uni[tc->unipos++] = group0_keyval;
789                                         tc->uni[tc->unipos] = '\0';
790                                         if (tc->unipos == 8) {
791                                             /* This behaviour is partly to allow us to continue to
792                                                use a fixed-length buffer for tc->uni.  Reason for
793                                                choosing the number 8 is that it's the length of
794                                                ``canonical form'' mentioned in the ISO 14755 spec.
795                                                An advantage over choosing 6 is that it allows using
796                                                backspace for typos & misremembering when entering a
797                                                6-digit number. */
798                                             insert_uni_char(tc);
799                                         }
800                                         show_curr_uni_char(tc);
801                                         return TRUE;
802                                     } else {
803                                         /* The intent is to ignore but consume characters that could be
804                                            typos for hex digits.  Gtk seems to ignore & consume all
805                                            non-hex-digits, and we do similar here.  Though note that some
806                                            shortcuts (like keypad +/- for zoom) get processed before
807                                            reaching this code. */
808                                         return TRUE;
809                                     }
810                                 }
811                             }
812                         }
814                         bool (Inkscape::Text::Layout::iterator::*cursor_movement_operator)() = NULL;
816                         /* Neither unimode nor IM consumed key; process text tool shortcuts */
817                         switch (group0_keyval) {
818                             case GDK_x:
819                             case GDK_X:
820                                 if (MOD__ALT_ONLY) {
821                                     desktop->setToolboxFocusTo ("altx-text");
822                                     return TRUE;
823                                 }
824                                 break;
825                             case GDK_space:
826                                 if (MOD__CTRL_ONLY) {
827                                     /* No-break space */
828                                     if (!tc->text) { // printable key; create text if none (i.e. if nascent_object)
829                                         sp_text_context_setup_text(tc);
830                                         tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
831                                     }
832                                     tc->text_sel_start = tc->text_sel_end = sp_te_replace(tc->text, tc->text_sel_start, tc->text_sel_end, "\302\240");
833                                     sp_text_context_update_cursor(tc);
834                                     sp_text_context_update_text_selection(tc);
835                                     ec->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("No-break space"));
836                                     sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
837                                                      _("Insert no-break space"));
838                                     return TRUE;
839                                 }
840                                 break;
841                             case GDK_U:
842                             case GDK_u:
843                                 if (MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT)) {
844                                     if (tc->unimode) {
845                                         tc->unimode = false;
846                                         ec->defaultMessageContext()->clear();
847                                     } else {
848                                         tc->unimode = true;
849                                         tc->unipos = 0;
850                                         ec->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("Unicode (<b>Enter</b> to finish): "));
851                                     }
852                                     if (tc->imc) {
853                                         gtk_im_context_reset(tc->imc);
854                                     }
855                                     return TRUE;
856                                 }
857                                 break;
858                             case GDK_B:
859                             case GDK_b:
860                                 if (MOD__CTRL_ONLY && tc->text) {
861                                     SPStyle const *style = sp_te_style_at_position(tc->text, std::min(tc->text_sel_start, tc->text_sel_end));
862                                     SPCSSAttr *css = sp_repr_css_attr_new();
863                                     if (style->font_weight.computed == SP_CSS_FONT_WEIGHT_NORMAL
864                                         || style->font_weight.computed == SP_CSS_FONT_WEIGHT_100
865                                         || style->font_weight.computed == SP_CSS_FONT_WEIGHT_200
866                                         || style->font_weight.computed == SP_CSS_FONT_WEIGHT_300
867                                         || style->font_weight.computed == SP_CSS_FONT_WEIGHT_400)
868                                         sp_repr_css_set_property(css, "font-weight", "bold");
869                                     else
870                                         sp_repr_css_set_property(css, "font-weight", "normal");
871                                     sp_te_apply_style(tc->text, tc->text_sel_start, tc->text_sel_end, css);
872                                     sp_repr_css_attr_unref(css);
873                                     sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
874                                                      _("Make bold"));
875                                     sp_text_context_update_cursor(tc);
876                                     sp_text_context_update_text_selection(tc);
877                                     return TRUE;
878                                 }
879                                 break;
880                             case GDK_I:
881                             case GDK_i:
882                                 if (MOD__CTRL_ONLY && tc->text) {
883                                     SPStyle const *style = sp_te_style_at_position(tc->text, std::min(tc->text_sel_start, tc->text_sel_end));
884                                     SPCSSAttr *css = sp_repr_css_attr_new();
885                                     if (style->font_style.computed == SP_CSS_FONT_STYLE_NORMAL)
886                                         sp_repr_css_set_property(css, "font-style", "italic");
887                                     else
888                                         sp_repr_css_set_property(css, "font-style", "normal");
889                                     sp_te_apply_style(tc->text, tc->text_sel_start, tc->text_sel_end, css);
890                                     sp_repr_css_attr_unref(css);
891                                     sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
892                                                      _("Make italic"));
893                                     sp_text_context_update_cursor(tc);
894                                     sp_text_context_update_text_selection(tc);
895                                     return TRUE;
896                                 }
897                                 break;
899                             case GDK_A:
900                             case GDK_a:
901                                 if (MOD__CTRL_ONLY && tc->text) {
902                                     Inkscape::Text::Layout const *layout = te_get_layout(tc->text);
903                                     if (layout) {
904                                         tc->text_sel_start = layout->begin();
905                                         tc->text_sel_end = layout->end();
906                                         sp_text_context_update_cursor(tc);
907                                         sp_text_context_update_text_selection(tc);
908                                         return TRUE;
909                                     }
910                                 }
911                                 break;
913                             case GDK_Return:
914                             case GDK_KP_Enter:
915                                 if (!tc->text) { // printable key; create text if none (i.e. if nascent_object)
916                                     sp_text_context_setup_text(tc);
917                                     tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
918                                 }
919                                 tc->text_sel_start = tc->text_sel_end = sp_te_delete(tc->text, tc->text_sel_start, tc->text_sel_end);
920                                 tc->text_sel_start = tc->text_sel_end = sp_te_insert_line(tc->text, tc->text_sel_start);
921                                 sp_text_context_update_cursor(tc);
922                                 sp_text_context_update_text_selection(tc);
923                                 sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
924                                                  _("New line"));
925                                 return TRUE;
926                             case GDK_BackSpace:
927                                 if (tc->text) { // if nascent_object, do nothing, but return TRUE; same for all other delete and move keys
928                                     if (tc->text_sel_start == tc->text_sel_end)
929                                         tc->text_sel_start.prevCursorPosition();
930                                     tc->text_sel_start = tc->text_sel_end = sp_te_delete(tc->text, tc->text_sel_start, tc->text_sel_end);
931                                     sp_text_context_update_cursor(tc);
932                                     sp_text_context_update_text_selection(tc);
933                                     sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
934                                                      _("Backspace"));
935                                 }
936                                 return TRUE;
937                             case GDK_Delete:
938                             case GDK_KP_Delete:
939                                 if (tc->text) {
940                                     if (tc->text_sel_start == tc->text_sel_end)
941                                         tc->text_sel_end.nextCursorPosition();
942                                     tc->text_sel_start = tc->text_sel_end = sp_te_delete(tc->text, tc->text_sel_start, tc->text_sel_end);
943                                     sp_text_context_update_cursor(tc);
944                                     sp_text_context_update_text_selection(tc);
945                                     sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
946                                                      _("Delete"));
947                                 }
948                                 return TRUE;
949                             case GDK_Left:
950                             case GDK_KP_Left:
951                             case GDK_KP_4:
952                                 if (tc->text) {
953                                     if (MOD__ALT) {
954                                         if (MOD__SHIFT)
955                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(-10, 0));
956                                         else
957                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(-1, 0));
958                                         sp_text_context_update_cursor(tc);
959                                         sp_text_context_update_text_selection(tc);
960                                         sp_document_maybe_done(sp_desktop_document(ec->desktop), "kern:left", SP_VERB_CONTEXT_TEXT, 
961                                                                _("Kern to the left"));
962                                     } else {
963                                         cursor_movement_operator = MOD__CTRL ? &Inkscape::Text::Layout::iterator::cursorLeftWithControl
964                                                                              : &Inkscape::Text::Layout::iterator::cursorLeft;
965                                         break;
966                                     }
967                                 }
968                                 return TRUE;
969                             case GDK_Right:
970                             case GDK_KP_Right:
971                             case GDK_KP_6:
972                                 if (tc->text) {
973                                     if (MOD__ALT) {
974                                         if (MOD__SHIFT)
975                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(10, 0));
976                                         else
977                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(1, 0));
978                                         sp_text_context_update_cursor(tc);
979                                         sp_text_context_update_text_selection(tc);
980                                         sp_document_maybe_done(sp_desktop_document(ec->desktop), "kern:right", SP_VERB_CONTEXT_TEXT, 
981                                                                _("Kern to the right"));
982                                     } else {
983                                         cursor_movement_operator = MOD__CTRL ? &Inkscape::Text::Layout::iterator::cursorRightWithControl
984                                                                              : &Inkscape::Text::Layout::iterator::cursorRight;
985                                         break;
986                                     }
987                                 }
988                                 return TRUE;
989                             case GDK_Up:
990                             case GDK_KP_Up:
991                             case GDK_KP_8:
992                                 if (tc->text) {
993                                     if (MOD__ALT) {
994                                         if (MOD__SHIFT)
995                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(0, -10));
996                                         else
997                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(0, -1));
998                                         sp_text_context_update_cursor(tc);
999                                         sp_text_context_update_text_selection(tc);
1000                                         sp_document_maybe_done(sp_desktop_document(ec->desktop), "kern:up", SP_VERB_CONTEXT_TEXT, 
1001                                                                _("Kern up"));
1003                                     } else {
1004                                         cursor_movement_operator = MOD__CTRL ? &Inkscape::Text::Layout::iterator::cursorUpWithControl
1005                                                                              : &Inkscape::Text::Layout::iterator::cursorUp;
1006                                         break;
1007                                     }
1008                                 }
1009                                 return TRUE;
1010                             case GDK_Down:
1011                             case GDK_KP_Down:
1012                             case GDK_KP_2:
1013                                 if (tc->text) {
1014                                     if (MOD__ALT) {
1015                                         if (MOD__SHIFT)
1016                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(0, 10));
1017                                         else
1018                                             sp_te_adjust_kerning_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, NR::Point(0, 1));
1019                                         sp_text_context_update_cursor(tc);
1020                                         sp_text_context_update_text_selection(tc);
1021                                         sp_document_maybe_done(sp_desktop_document(ec->desktop), "kern:down", SP_VERB_CONTEXT_TEXT, 
1022                                                                _("Kern down"));
1024                                     } else {
1025                                         cursor_movement_operator = MOD__CTRL ? &Inkscape::Text::Layout::iterator::cursorDownWithControl
1026                                                                              : &Inkscape::Text::Layout::iterator::cursorDown;
1027                                         break;
1028                                     }
1029                                 }
1030                                 return TRUE;
1031                             case GDK_Home:
1032                             case GDK_KP_Home:
1033                                 if (tc->text) {
1034                                     if (MOD__CTRL)
1035                                         cursor_movement_operator = &Inkscape::Text::Layout::iterator::thisStartOfShape;
1036                                     else
1037                                         cursor_movement_operator = &Inkscape::Text::Layout::iterator::thisStartOfLine;
1038                                     break;
1039                                 }
1040                                 return TRUE;
1041                             case GDK_End:
1042                             case GDK_KP_End:
1043                                 if (tc->text) {
1044                                     if (MOD__CTRL)
1045                                         cursor_movement_operator = &Inkscape::Text::Layout::iterator::nextStartOfShape;
1046                                     else
1047                                         cursor_movement_operator = &Inkscape::Text::Layout::iterator::thisEndOfLine;
1048                                     break;
1049                                 }
1050                                 return TRUE;
1051                             case GDK_Escape:
1052                                 if (tc->creating) {
1053                                     tc->creating = 0;
1054                                     if (tc->grabbed) {
1055                                         sp_canvas_item_ungrab(tc->grabbed, GDK_CURRENT_TIME);
1056                                         tc->grabbed = NULL;
1057                                     }
1058                                     Inkscape::Rubberband::get()->stop();
1059                                 } else {
1060                                     sp_desktop_selection(ec->desktop)->clear();
1061                                 }
1062                                 tc->nascent_object = FALSE;
1063                                 return TRUE;
1064                             case GDK_bracketleft:
1065                                 if (tc->text) {
1066                                     if (MOD__ALT || MOD__CTRL) {
1067                                         if (MOD__ALT) {
1068                                             if (MOD__SHIFT) {
1069                                                 // FIXME: alt+shift+[] does not work, don't know why
1070                                                 sp_te_adjust_rotation_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, -10);
1071                                             } else {
1072                                                 sp_te_adjust_rotation_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, -1);
1073                                             }
1074                                         } else {
1075                                             sp_te_adjust_rotation(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, -90);
1076                                         }
1077                                         sp_document_maybe_done(sp_desktop_document(ec->desktop), "textrot:ccw", SP_VERB_CONTEXT_TEXT, 
1078                                                                _("Rotate counterclockwise"));
1079                                         sp_text_context_update_cursor(tc);
1080                                         sp_text_context_update_text_selection(tc);
1081                                         return TRUE;
1082                                     }
1083                                 }
1084                                 break;
1085                             case GDK_bracketright:
1086                                 if (tc->text) {
1087                                     if (MOD__ALT || MOD__CTRL) {
1088                                         if (MOD__ALT) {
1089                                             if (MOD__SHIFT) {
1090                                                 // FIXME: alt+shift+[] does not work, don't know why
1091                                                 sp_te_adjust_rotation_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, 10);
1092                                             } else {
1093                                                 sp_te_adjust_rotation_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, 1);
1094                                             }
1095                                         } else {
1096                                             sp_te_adjust_rotation(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, 90);
1097                                         }
1098                                         sp_document_maybe_done(sp_desktop_document(ec->desktop), "textrot:cw", SP_VERB_CONTEXT_TEXT, 
1099                                                                 _("Rotate clockwise"));
1100                                         sp_text_context_update_cursor(tc);
1101                                         sp_text_context_update_text_selection(tc);
1102                                         return TRUE;
1103                                     }
1104                                 }
1105                                 break;
1106                             case GDK_less:
1107                             case GDK_comma:
1108                                 if (tc->text) {
1109                                     if (MOD__ALT) {
1110                                         if (MOD__CTRL) {
1111                                             if (MOD__SHIFT)
1112                                                 sp_te_adjust_linespacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, -10);
1113                                             else
1114                                                 sp_te_adjust_linespacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, -1);
1115                                             sp_document_maybe_done(sp_desktop_document(ec->desktop), "linespacing:dec", SP_VERB_CONTEXT_TEXT, 
1116                                                                     _("Contract line spacing"));
1118                                         } else {
1119                                             if (MOD__SHIFT)
1120                                                 sp_te_adjust_tspan_letterspacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, -10);
1121                                             else
1122                                                 sp_te_adjust_tspan_letterspacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, -1);
1123                                             sp_document_maybe_done(sp_desktop_document(ec->desktop), "letterspacing:dec", SP_VERB_CONTEXT_TEXT, 
1124                                                                     _("Contract letter spacing"));
1126                                         }
1127                                         sp_text_context_update_cursor(tc);
1128                                         sp_text_context_update_text_selection(tc);
1129                                         return TRUE;
1130                                     }
1131                                 }
1132                                 break;
1133                             case GDK_greater:
1134                             case GDK_period:
1135                                 if (tc->text) {
1136                                     if (MOD__ALT) {
1137                                         if (MOD__CTRL) {
1138                                             if (MOD__SHIFT)
1139                                                 sp_te_adjust_linespacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, 10);
1140                                             else
1141                                                 sp_te_adjust_linespacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, 1);
1142                                             sp_document_maybe_done(sp_desktop_document(ec->desktop), "linespacing:inc", SP_VERB_CONTEXT_TEXT, 
1143                                                                     _("Expand line spacing"));
1145                                         } else {
1146                                             if (MOD__SHIFT)
1147                                                 sp_te_adjust_tspan_letterspacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, 10);
1148                                             else
1149                                                 sp_te_adjust_tspan_letterspacing_screen(tc->text, tc->text_sel_start, tc->text_sel_end, ec->desktop, 1);
1150                                             sp_document_maybe_done(sp_desktop_document(ec->desktop), "letterspacing:inc", SP_VERB_CONTEXT_TEXT, 
1151                                                                     _("Expand letter spacing"));
1153                                         }
1154                                         sp_text_context_update_cursor(tc);
1155                                         sp_text_context_update_text_selection(tc);
1156                                         return TRUE;
1157                                     }
1158                                 }
1159                                 break;
1160                             default:
1161                                 break;
1162                         }
1164                         if (cursor_movement_operator) {
1165                             Inkscape::Text::Layout::iterator old_start = tc->text_sel_start;
1166                             Inkscape::Text::Layout::iterator old_end = tc->text_sel_end;
1167                             (tc->text_sel_end.*cursor_movement_operator)();
1168                             if (!MOD__SHIFT)
1169                                 tc->text_sel_start = tc->text_sel_end;
1170                             if (old_start != tc->text_sel_start || old_end != tc->text_sel_end) {
1171                                 sp_text_context_update_cursor(tc);
1172                                 sp_text_context_update_text_selection(tc);
1173                             }
1174                             return TRUE;
1175                         }
1177                 } else return TRUE; // return the "I took care of it" value if it was consumed by the IM
1178             } else { // do nothing if there's no object to type in - the key will be sent to parent context,
1179                 // except up/down that are swallowed to prevent the zoom field from activation
1180                 if ((group0_keyval == GDK_Up    ||
1181                      group0_keyval == GDK_Down  ||
1182                      group0_keyval == GDK_KP_Up ||
1183                      group0_keyval == GDK_KP_Down )
1184                     && !MOD__CTRL_ONLY) {
1185                     return TRUE;
1186                 } else if (group0_keyval == GDK_Escape) { // cancel rubberband
1187                     if (tc->creating) {
1188                         tc->creating = 0;
1189                         if (tc->grabbed) {
1190                             sp_canvas_item_ungrab(tc->grabbed, GDK_CURRENT_TIME);
1191                             tc->grabbed = NULL;
1192                         }
1193                         Inkscape::Rubberband::get()->stop();
1194                     }
1195                 }
1196             }
1197             break;
1198         }
1200         case GDK_KEY_RELEASE:
1201             if (!tc->unimode && tc->imc && gtk_im_context_filter_keypress(tc->imc, (GdkEventKey*) event)) {
1202                 return TRUE;
1203             }
1204             break;
1205         default:
1206             break;
1207     }
1209     // if nobody consumed it so far
1210     if (((SPEventContextClass *) parent_class)->root_handler) { // and there's a handler in parent context,
1211         return ((SPEventContextClass *) parent_class)->root_handler(ec, event); // send event to parent
1212     } else {
1213         return FALSE; // return "I did nothing" value so that global shortcuts can be activated
1214     }
1217 /**
1218  Attempts to paste system clipboard into the currently edited text, returns true on success
1219  */
1220 bool
1221 sp_text_paste_inline(SPEventContext *ec)
1223     if (!SP_IS_TEXT_CONTEXT(ec))
1224         return false;
1226     SPTextContext *tc = SP_TEXT_CONTEXT(ec);
1228     if ((tc->text) || (tc->nascent_object)) {
1229         // there is an active text object in this context, or a new object was just created
1231         Glib::RefPtr<Gtk::Clipboard> refClipboard = Gtk::Clipboard::get();
1232         Glib::ustring const text = refClipboard->wait_for_text();
1234         if (!text.empty()) {
1236             if (!tc->text) { // create text if none (i.e. if nascent_object)
1237                 sp_text_context_setup_text(tc);
1238                 tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
1239             }
1241             // using indices is slow in ustrings. Whatever.
1242             Glib::ustring::size_type begin = 0;
1243             for ( ; ; ) {
1244                 Glib::ustring::size_type end = text.find('\n', begin);
1245                 if (end == Glib::ustring::npos) {
1246                     if (begin != text.length())
1247                         tc->text_sel_start = tc->text_sel_end = sp_te_replace(tc->text, tc->text_sel_start, tc->text_sel_end, text.substr(begin).c_str());
1248                     break;
1249                 }
1250                 tc->text_sel_start = tc->text_sel_end = sp_te_replace(tc->text, tc->text_sel_start, tc->text_sel_end, text.substr(begin, end - begin).c_str());
1251                 tc->text_sel_start = tc->text_sel_end = sp_te_insert_line(tc->text, tc->text_sel_start);
1252                 begin = end + 1;
1253             }
1254             sp_document_done(sp_desktop_document(ec->desktop), SP_VERB_CONTEXT_TEXT, 
1255                              _("Paste text"));
1257             return true;
1258         }
1259     } // FIXME: else create and select a new object under cursor!
1261     return false;
1264 /**
1265  Gets the raw characters that comprise the currently selected text, converting line
1266  breaks into lf characters.
1267 */
1268 Glib::ustring
1269 sp_text_get_selected_text(SPEventContext const *ec)
1271     if (!SP_IS_TEXT_CONTEXT(ec))
1272         return "";
1273     SPTextContext const *tc = SP_TEXT_CONTEXT(ec);
1274     if (tc->text == NULL)
1275         return "";
1277     return sp_te_get_string_multiline(tc->text, tc->text_sel_start, tc->text_sel_end);
1280 /**
1281  Deletes the currently selected characters. Returns false if there is no
1282  text selection currently.
1283 */
1284 bool sp_text_delete_selection(SPEventContext *ec)
1286     if (!SP_IS_TEXT_CONTEXT(ec))
1287         return false;
1288     SPTextContext *tc = SP_TEXT_CONTEXT(ec);
1289     if (tc->text == NULL)
1290         return false;
1292     if (tc->text_sel_start == tc->text_sel_end)
1293         return false;
1294     tc->text_sel_start = tc->text_sel_end = sp_te_delete(tc->text, tc->text_sel_start, tc->text_sel_end);
1295     sp_text_context_update_cursor(tc);
1296     sp_text_context_update_text_selection(tc);
1297     return true;
1300 /**
1301  * \param selection Should not be NULL.
1302  */
1303 static void
1304 sp_text_context_selection_changed(Inkscape::Selection *selection, SPTextContext *tc)
1306     g_assert(selection != NULL);
1308     SPEventContext *ec = SP_EVENT_CONTEXT(tc);
1310     if (ec->shape_knot_holder) { // destroy knotholder
1311         sp_knot_holder_destroy(ec->shape_knot_holder);
1312         ec->shape_knot_holder = NULL;
1313     }
1315     if (ec->shape_repr) { // remove old listener
1316         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
1317         Inkscape::GC::release(ec->shape_repr);
1318         ec->shape_repr = 0;
1319     }
1321     SPItem *item = selection->singleItem();
1322     if (item && SP_IS_FLOWTEXT (item) && SP_FLOWTEXT(item)->has_internal_frame()) {
1323         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
1324         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(SP_FLOWTEXT(item)->get_frame(NULL));
1325         if (shape_repr) {
1326             ec->shape_repr = shape_repr;
1327             Inkscape::GC::anchor(shape_repr);
1328             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
1329         }
1330     }
1332     if (tc->text && (item != tc->text)) {
1333         sp_text_context_forget_text(tc);
1334     }
1335     tc->text = NULL;
1337     if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
1338         tc->text = item;
1339         Inkscape::Text::Layout const *layout = te_get_layout(tc->text);
1340         if (layout)
1341             tc->text_sel_start = tc->text_sel_end = layout->end();
1342     } else {
1343         tc->text = NULL;
1344     }
1346     // we update cursor without scrolling, because this position may not be final;
1347     // item_handler moves cusros to the point of click immediately
1348     sp_text_context_update_cursor(tc, false);
1349     sp_text_context_update_text_selection(tc);
1352 static void
1353 sp_text_context_selection_modified(Inkscape::Selection *selection, guint flags, SPTextContext *tc)
1355     sp_text_context_update_cursor(tc);
1356     sp_text_context_update_text_selection(tc);
1359 static bool
1360 sp_text_context_style_set(SPCSSAttr const *css, SPTextContext *tc)
1362     if (tc->text == NULL)
1363         return false;
1364     if (tc->text_sel_start == tc->text_sel_end)
1365         return false;    // will get picked up by the parent and applied to the whole text object
1367     sp_te_apply_style(tc->text, tc->text_sel_start, tc->text_sel_end, css);
1368     sp_document_done(sp_desktop_document(tc->desktop), SP_VERB_CONTEXT_TEXT, 
1369                      _("Set text style"));
1370     sp_text_context_update_cursor(tc);
1371     sp_text_context_update_text_selection(tc);
1373     return true;
1376 static int
1377 sp_text_context_style_query(SPStyle *style, int property, SPTextContext *tc)
1379     if (tc->text == NULL)
1380         return QUERY_STYLE_NOTHING;
1381     const Inkscape::Text::Layout *layout = te_get_layout(tc->text);
1382     if (layout == NULL)
1383         return QUERY_STYLE_NOTHING;
1384     sp_text_context_validate_cursor_iterators(tc);
1386     GSList *styles_list = NULL;
1388     Inkscape::Text::Layout::iterator begin_it, end_it;
1389     if (tc->text_sel_start < tc->text_sel_end) {
1390         begin_it = tc->text_sel_start;
1391         end_it = tc->text_sel_end;
1392     } else {
1393         begin_it = tc->text_sel_end;
1394         end_it = tc->text_sel_start;
1395     }
1396     if (begin_it == end_it)
1397         if (!begin_it.prevCharacter())
1398             end_it.nextCharacter();
1399     for (Inkscape::Text::Layout::iterator it = begin_it ; it < end_it ; it.nextStartOfSpan()) {
1400         SPObject const *pos_obj = 0;
1401         void *rawptr = 0;
1402         layout->getSourceOfCharacter(it, &rawptr);
1403         pos_obj = SP_OBJECT(rawptr);
1404         if (pos_obj == 0) continue;
1405         while (SP_OBJECT_STYLE(pos_obj) == NULL && SP_OBJECT_PARENT(pos_obj))
1406             pos_obj = SP_OBJECT_PARENT(pos_obj);   // SPStrings don't have style
1407         styles_list = g_slist_prepend(styles_list, (gpointer)pos_obj);
1408     }
1410     int result = sp_desktop_query_style_from_list (styles_list, style, property);
1412     g_slist_free(styles_list);
1413     return result;
1416 static void
1417 sp_text_context_validate_cursor_iterators(SPTextContext *tc)
1419     if (tc->text == NULL)
1420         return;
1421     Inkscape::Text::Layout const *layout = te_get_layout(tc->text);
1422     if (layout) {     // undo can change the text length without us knowing it
1423         layout->validateIterator(&tc->text_sel_start);
1424         layout->validateIterator(&tc->text_sel_end);
1425     }
1428 static void
1429 sp_text_context_update_cursor(SPTextContext *tc,  bool scroll_to_see)
1431     GdkRectangle im_cursor = { 0, 0, 1, 1 };
1433     // due to interruptible display, tc may already be destroyed during a display update before
1434     // the cursor update (can't do both atomically, alas)
1435     if (!tc->desktop) return;
1437     if (tc->text) {
1438         NR::Point p0, p1;
1439         sp_te_get_cursor_coords(tc->text, tc->text_sel_end, p0, p1);
1440         NR::Point const d0 = p0 * sp_item_i2d_affine(SP_ITEM(tc->text));
1441         NR::Point const d1 = p1 * sp_item_i2d_affine(SP_ITEM(tc->text));
1443         // scroll to show cursor
1444         if (scroll_to_see) {
1445             NR::Point const dm = (d0 + d1) / 2;
1446             // unlike mouse moves, here we must scroll all the way at first shot, so we override the autoscrollspeed
1447             SP_EVENT_CONTEXT(tc)->desktop->scroll_to_point(&dm, 1.0);
1448         }
1450         sp_canvas_item_show(tc->cursor);
1451         sp_ctrlline_set_coords(SP_CTRLLINE(tc->cursor), d0, d1);
1453         /* fixme: ... need another transformation to get canvas widget coordinate space? */
1454         im_cursor.x = (int) floor(d0[NR::X]);
1455         im_cursor.y = (int) floor(d0[NR::Y]);
1456         im_cursor.width = (int) floor(d1[NR::X]) - im_cursor.x;
1457         im_cursor.height = (int) floor(d1[NR::Y]) - im_cursor.y;
1459         tc->show = TRUE;
1460         tc->phase = 1;
1462         if (SP_IS_FLOWTEXT(tc->text)) {
1463             SPItem *frame = SP_FLOWTEXT(tc->text)->get_frame (NULL); // first frame only
1464             if (frame) {
1465                 sp_canvas_item_show(tc->frame);
1466                 NR::Maybe<NR::Rect> frame_bbox = sp_item_bbox_desktop(frame);
1467                 if (frame_bbox) {
1468                     SP_CTRLRECT(tc->frame)->setRectangle(*frame_bbox);
1469                 }
1470             }
1471             SP_EVENT_CONTEXT(tc)->_message_context->set(Inkscape::NORMAL_MESSAGE, _("Type flowed text; <b>Enter</b> to start new paragraph."));
1472         } else {
1473             SP_EVENT_CONTEXT(tc)->_message_context->set(Inkscape::NORMAL_MESSAGE, _("Type text; <b>Enter</b> to start new line."));
1474         }
1476     } else {
1477         sp_canvas_item_hide(tc->cursor);
1478         sp_canvas_item_hide(tc->frame);
1479         tc->show = FALSE;
1480         if (!tc->nascent_object) {
1481             SP_EVENT_CONTEXT(tc)->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> to select or create text, <b>drag</b> to create flowed text; then type.")); // FIXME: this is a copy of string from tools-switch, do not desync
1482         }
1483     }
1485     if (tc->imc) {
1486         gtk_im_context_set_cursor_location(tc->imc, &im_cursor);
1487     }
1488     SP_EVENT_CONTEXT(tc)->desktop->emitToolSubselectionChanged((gpointer)tc);
1491 static void sp_text_context_update_text_selection(SPTextContext *tc)
1493     // due to interruptible display, tc may already be destroyed during a display update before
1494     // the selection update (can't do both atomically, alas)
1495     if (!tc->desktop) return;
1497     for (std::vector<SPCanvasItem*>::iterator it = tc->text_selection_quads.begin() ; it != tc->text_selection_quads.end() ; it++) {
1498         sp_canvas_item_hide(*it);
1499         gtk_object_destroy(*it);
1500     }
1501     tc->text_selection_quads.clear();
1503     std::vector<NR::Point> quads;
1504     if (tc->text != NULL)
1505         quads = sp_te_create_selection_quads(tc->text, tc->text_sel_start, tc->text_sel_end, sp_item_i2d_affine(tc->text));
1506     for (unsigned i = 0 ; i < quads.size() ; i += 4) {
1507         SPCanvasItem *quad_canvasitem;
1508         quad_canvasitem = sp_canvas_item_new(sp_desktop_controls(tc->desktop), SP_TYPE_CTRLQUADR, NULL);
1509         sp_ctrlquadr_set_rgba32(SP_CTRLQUADR(quad_canvasitem), 0x000000ff);
1510         sp_ctrlquadr_set_coords(SP_CTRLQUADR(quad_canvasitem), quads[i], quads[i+1], quads[i+2], quads[i+3]);
1511         sp_canvas_item_show(quad_canvasitem);
1512         tc->text_selection_quads.push_back(quad_canvasitem);
1513     }
1516 static gint
1517 sp_text_context_timeout(SPTextContext *tc)
1519     if (tc->show) {
1520         if (tc->phase) {
1521             tc->phase = 0;
1522             sp_canvas_item_hide(tc->cursor);
1523         } else {
1524             tc->phase = 1;
1525             sp_canvas_item_show(tc->cursor);
1526         }
1527     }
1529     return TRUE;
1532 static void
1533 sp_text_context_forget_text(SPTextContext *tc)
1535     if (! tc->text) return;
1536     SPItem *ti = tc->text;
1537     /* We have to set it to zero,
1538      * or selection changed signal messes everything up */
1539     tc->text = NULL;
1540     if ((SP_IS_TEXT(ti) || SP_IS_FLOWTEXT(ti)) && sp_te_input_is_empty(ti)) {
1541         Inkscape::XML::Node *text_repr=SP_OBJECT_REPR(ti);
1542         // the repr may already have been unparented
1543         // if we were called e.g. as the result of
1544         // an undo or the element being removed from
1545         // the XML editor
1546         if ( text_repr && sp_repr_parent(text_repr) ) {
1547             sp_repr_unparent(text_repr);
1548         }
1549     }
1552 gint
1553 sptc_focus_in(GtkWidget *widget, GdkEventFocus *event, SPTextContext *tc)
1555     gtk_im_context_focus_in(tc->imc);
1556     return FALSE;
1559 gint
1560 sptc_focus_out(GtkWidget *widget, GdkEventFocus *event, SPTextContext *tc)
1562     gtk_im_context_focus_out(tc->imc);
1563     return FALSE;
1566 static void
1567 sptc_commit(GtkIMContext *imc, gchar *string, SPTextContext *tc)
1569     if (!tc->text) {
1570         sp_text_context_setup_text(tc);
1571         tc->nascent_object = 0; // we don't need it anymore, having created a real <text>
1572     }
1574     tc->text_sel_start = tc->text_sel_end = sp_te_replace(tc->text, tc->text_sel_start, tc->text_sel_end, string);
1575     sp_text_context_update_cursor(tc);
1576     sp_text_context_update_text_selection(tc);
1578     sp_document_done(SP_OBJECT_DOCUMENT(tc->text), SP_VERB_CONTEXT_TEXT, 
1579                      _("Type text"));
1583 /*
1584   Local Variables:
1585   mode:c++
1586   c-file-style:"stroustrup"
1587   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1588   indent-tabs-mode:nil
1589   fill-column:99
1590   End:
1591 */
1592 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :