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notebook.cpp
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notebook.cpp
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#include "notebook.h"
#include "notebook_clipboard.hpp"
#include "notebook_highlight.hpp"
#include "imagewidgets.h"
#include <unordered_set>
// #define _DEBUG_MOTION_
#ifdef _DEBUG_MOTION_
#define DMPRINTF(...) printf(__VA_ARGS__);
#else
#define DMPRINTF(...)
#endif
/* list of Gsv syntax highlighting classes that can be rendered as widgets */
/* TODO: this probably would be more elegant as a list of pairs (class,rendering function) */
Glib::ustring CNotebook::renderable_classes[]
= { "checkbox",
"image",
#if defined (HAVE_LASEM) || defined (HAVE_CLATEXMATH)
"latex"
#endif
};
CNotebook::CNotebook()
{
last_device=NULL;
}
/* DIRTY HACK: If the layout changes a lot, sometimes GtkTextView will
* get events without it being valid (event race?). This can lead
* to crashes. Therefore, we'll manually check for layout validity
* at the beginning of events. */
extern "C" bool gtk_text_layout_is_valid(void*);
bool CNotebook::on_event(GdkEvent*)
{
if(!gtk_text_layout_is_valid(*(void**)GTK_TEXT_VIEW(gobj())->priv)) {
//printf("event blocked\n");
return true;
}
return false;
}
/* Initialise notebook widget, loading style files etc. from data_path. */
void CNotebook::Init(std::string data_path, bool use_highlight_proxy)
{
sbuffer = get_source_buffer();
/* load syntax highlighting scheme */
Glib::RefPtr<Gsv::StyleSchemeManager> styleman = Gsv::StyleSchemeManager::create();
styleman->set_search_path({data_path+"/sourceview/"});
Glib::RefPtr<Gsv::StyleScheme> the_scheme;
the_scheme = styleman->get_scheme("notekit");
sbuffer->set_style_scheme(the_scheme);
Glib::RefPtr<Gsv::LanguageManager> langman = Gsv::LanguageManager::create();
/* make our custom markdown definition override the system gtksourceview defaults,
* but retain access to them for other language defs */
std::vector<std::string> paths = langman->get_search_path();
paths.insert(paths.begin(),data_path+"/sourceview/");
if(use_highlight_proxy) paths.insert(paths.begin(),GetHighlightProxyDir());
langman->set_search_path(paths);
sbuffer->set_language(langman->get_language("markdown"));
/* register our serialisation formats */
sbuffer->register_serialize_format("text/notekit-markdown", sigc::bind( sigc::mem_fun(this,&CNotebook::on_serialize), false ));
sbuffer->register_deserialize_format("text/notekit-markdown",sigc::mem_fun(this,&CNotebook::on_deserialize));
sbuffer->register_serialize_format("text/plain", sigc::bind( sigc::mem_fun(this,&CNotebook::on_serialize), true ));
Glib::RefPtr<Gtk::TargetList> l = sbuffer->get_copy_target_list();
/* create drawing overlay */
add_child_in_window(overlay,Gtk::TEXT_WINDOW_WIDGET,0,0);
/* define actions that the toolbar will hook up to */
actions = Gio::SimpleActionGroup::create();
#define ACTION(name,param1,param2) actions->add_action(name, sigc::bind( sigc::mem_fun(this,&CNotebook::on_action), std::string(name), param1, param2 ) )
ACTION("cmode-text",NB_ACTION_CMODE,NB_MODE_TEXT);
ACTION("cmode-draw",NB_ACTION_CMODE,NB_MODE_DRAW);
ACTION("cmode-erase",NB_ACTION_CMODE,NB_MODE_ERASE);
ACTION("cmode-select",NB_ACTION_CMODE,NB_MODE_SELECT);
ACTION("stroke1",NB_ACTION_STROKE,1);
ACTION("stroke2",NB_ACTION_STROKE,2);
ACTION("stroke3",NB_ACTION_STROKE,3);
/* connect signals */
signal_size_allocate().connect(sigc::mem_fun(this,&CNotebook::on_allocate));
overlay.signal_draw().connect(sigc::mem_fun(this,&CNotebook::on_redraw_overlay));
signal_button_press_event().connect(sigc::mem_fun(this,&CNotebook::on_button_press),false);
signal_button_release_event().connect(sigc::mem_fun(this,&CNotebook::on_button_release),false);
signal_motion_notify_event().connect(sigc::mem_fun(this,&CNotebook::on_motion_notify),false);
sbuffer->signal_insert().connect(sigc::mem_fun(this,&CNotebook::on_insert),true);
sbuffer->signal_changed().connect(sigc::mem_fun(this,&CNotebook::on_changed),true);
sbuffer->signal_highlight_updated().connect(sigc::mem_fun(this,&CNotebook::on_highlight_updated),true);
sbuffer->property_cursor_position().signal_changed().connect(sigc::mem_fun(this,&CNotebook::on_move_cursor));
/* overwrite clipboard signals with our custom impls */
GtkTextViewClass *k = GTK_TEXT_VIEW_GET_CLASS(gobj());
k->copy_clipboard = notebook_copy_clipboard;
k->cut_clipboard = notebook_cut_clipboard;
k->paste_clipboard = notebook_paste_clipboard;
/* DIRTY HACK: GtkSourceView's cursor movement methods loop forever in the presence of invisible text sometimes */
GtkWidget *text_view = gtk_text_view_new();
GtkTextViewClass *plain = GTK_TEXT_VIEW_GET_CLASS(text_view);
k->extend_selection = plain->extend_selection;
k->move_cursor = plain->move_cursor;
gtk_widget_destroy(text_view);
//printf("%08lX %08lX",k->extend_selection,GTK_TEXT_VIEW_CLASS(&k->parent_class)->extend_selection);
//k->extend_selection = GTK_TEXT_VIEW_CLASS(&k->parent_class)->extend_selection;
//g_signal_connect(gobj(),"copy-clipboard",G_CALLBACK(notebook_copy_clipboard),NULL);
active_state=NB_STATE_NOTHING;
update_cursor=false;
attention_ewma=0.0;
/* create tags for style aspects that the syntax highlighter doesn't handle */
tag_extra_space = sbuffer->create_tag();
tag_extra_space->property_pixels_below_lines().set_value(8);
tag_extra_space->property_pixels_above_lines().set_value(8);
tag_blockquote = sbuffer->create_tag();
tag_blockquote->property_left_margin().set_value(16);
tag_blockquote->property_indent().set_value(-16);
tag_blockquote->property_accumulative_margin().set_value(true);
Gdk::RGBA fg = get_style_context()->get_color();
fg.set_alpha(0.75);
tag_blockquote->property_foreground_rgba().set_value(fg);
tag_invisible = sbuffer->create_tag();
tag_invisible->property_foreground_rgba().set_value(Gdk::RGBA("rgba(0,0,0,0)"));
tag_hidden = sbuffer->create_tag();
tag_hidden->property_invisible().set_value(true);
tag_mono = sbuffer->create_tag();
tag_mono->property_family().set_value("monospace");
tag_mono->property_scale().set_value(0.8);
tag_is_anchor=sbuffer->create_tag();
/* remember position for proximity widgets */
last_position=sbuffer->create_mark("last_position", sbuffer->begin(),true);
tag_proximity=sbuffer->create_tag();
//use for debug
//tag_proximity->property_background_rgba().set_value(Gdk::RGBA("rgb(255,128,128)"));
set_wrap_mode(Gtk::WRAP_WORD_CHAR);
}
void CNotebook::SetCursor(Glib::RefPtr<Gdk::Cursor> c)
{
if(auto w=get_window(Gtk::TEXT_WINDOW_TEXT)) w->set_cursor(c);
}
void CNotebook::on_action(std::string name,int type,int param)
{
switch(type) {
case NB_ACTION_CMODE:
devicemodes[last_device]=param;
update_cursor=true;
break;
case NB_ACTION_STROKE:
stroke_width=param;
break;
}
}
void CNotebook::on_allocate(Gtk::Allocation &a)
{
//printf("alloc %d %d\n",a.get_width(),a.get_height());
overlay.size_allocate(a);
if(overlay.get_window()) {
/* if we don't do this, some mystery subset of signals gets eaten */
overlay.get_window()->set_pass_through(true);
// size changed; need to recreate Cairo surface
Cairo::RefPtr<Cairo::Surface> newptr = overlay.get_window()->create_similar_surface(Cairo::CONTENT_COLOR_ALPHA,a.get_width(),a.get_height());
overlay_ctx = Cairo::Context::create(newptr);
// copy old surface
if(overlay_image) {
overlay_ctx->save();
overlay_ctx->set_source(overlay_image,0,0);
overlay_ctx->rectangle(0,0,a.get_width(),a.get_height());
overlay_ctx->set_operator(Cairo::OPERATOR_SOURCE);
overlay_ctx->fill();
overlay_ctx->restore();
}
// replace surface
overlay_image = newptr;
}
}
void CStroke::Render(const Cairo::RefPtr<Cairo::Context> &ctx, float basex, float basey, int start_index)
{
ctx->translate(-basex,-basey);
ctx->set_source_rgba(r,g,b,a);
ctx->set_line_cap(Cairo::LINE_CAP_ROUND);
for(unsigned int i=start_index;i<xcoords.size();++i) {
ctx->move_to(xcoords[i-1],ycoords[i-1]);
ctx->line_to(xcoords[i],ycoords[i]);
ctx->set_line_width(pcoords[i-1]);
ctx->stroke();
}
ctx->translate(basex,basey);
}
void CStroke::RenderSelectionGlow(const Cairo::RefPtr<Cairo::Context> &ctx, float basex, float basey)
{
if(!selected.size()) return;
ctx->translate(-basex,-basey);
ctx->set_source_rgba(r,g,b,a);
ctx->set_line_cap(Cairo::LINE_CAP_ROUND);
for(unsigned int i=1;i<xcoords.size();++i) {
if(selected[i]) {
ctx->move_to(xcoords[i-1],ycoords[i-1]);
ctx->line_to(xcoords[i],ycoords[i]);
ctx->set_line_width(pcoords[i-1]+6);
ctx->stroke();
}
}
ctx->translate(basex,basey);
}
#include <gdk/gdkkeysyms.h>
bool CNotebook::on_key_press_event(GdkEventKey *k)
{
modifier_keys = k->state & (GDK_MODIFIER_MASK);
latest_keyval = k->keyval;
return Gsv::View::on_key_press_event(k);
}
void CNotebook::on_changed()
{
last_modified = g_get_real_time();
}
void CNotebook::on_insert(const Gtk::TextBuffer::iterator &iter,const Glib::ustring& str,int len)
{
if(str=="\n") {
if(modifier_keys & GDK_SHIFT_MASK) return;
if(!iter.ends_line()) return;
/* extract previous line's first word and indentation preceding it */
Gtk::TextBuffer::iterator start = iter; start.backward_line();
Gtk::TextBuffer::iterator end = start;
if(end.get_char()==' ' || end.get_char()=='\t') end.forward_find_char([] (char c) { return (c!=' ' && c!='\t') || c=='\n'; });
end.forward_find_char([] (char c) { return c==' ' || c=='\t' || c=='\n'; });
end.forward_char();
Glib::ustring str = sbuffer->get_text(start,end,true);
end.forward_char();
int num=0,pad=0,len=0;
//printf("word: %s\n",str.c_str());
/* count indentation spaces, then eat them */
sscanf(str.c_str()," %n",&pad);
str=str.substr(pad);
//printf("word: %s\n",str.c_str());
/* try to see if we have any valid markdown enumeration we could extend */
sscanf(str.c_str(),"%d.%*1[ \t]%n",&num,&len);
char buf[512];
if(len==str.length() && num>0) {
if(end >= iter) {
sbuffer->erase(start,iter);
return;
}
sprintf(buf,"%*s%d. ",pad,"",num+1);
sbuffer->insert(iter,buf);
} else if(str=="* ") {
if(end >= iter) {
sbuffer->erase(start,iter);
return;
}
sprintf(buf,"%*s* ",pad,"");
sbuffer->insert(iter,buf);
} else if(str=="- ") {
if(end >= iter) {
sbuffer->erase(start,iter);
return;
}
sprintf(buf,"%*s- ",pad,"");
sbuffer->insert(iter,buf);
} else if(str=="> ") {
if(end == iter) {
sbuffer->erase(start,iter);
return;
}
sprintf(buf,"%*s> ",pad,"");
sbuffer->insert(iter,buf);
}
}
/* TODO: we really should fix up the iterator, but this version of gtkmm erroneously sets iter to const */
}
/* redraw cairo overlay: active stroke, special widgets like lines, etc. */
bool CNotebook::on_redraw_overlay(const Cairo::RefPtr<Cairo::Context> &ctx)
{
/* it seems that this can theoretically be called before the first on_allocate;
* since we don't know our document view's size yet, we have no choice but to bail */
if(!overlay_image) {
return true;
}
//active.Render(ctx,bx,by);
ctx->set_source(overlay_image,0,0);
ctx->paint();
//ctx->rectangle(0,0,get_width(),get_height());
//ctx->fill();
/* draw horizontal rules */
Gdk::Rectangle rect;
get_visible_rect(rect);
Gsv::Buffer::iterator i, end;
get_iter_at_location(i,rect.get_x(),rect.get_y());
get_iter_at_location(end,rect.get_x()+rect.get_width(),rect.get_y()+rect.get_height());
do{
if(sbuffer->iter_has_context_class(i, "hline")) {
int y, height;
get_line_yrange(i,y,height);
int linex0,liney0;
buffer_to_window_coords(Gtk::TEXT_WINDOW_WIDGET,0,y+height,linex0,liney0);
ctx->set_line_width(1.0);
ctx->set_source_rgba(.627,.659,.75,1);
ctx->move_to(linex0+margin_x,liney0-height/2);
ctx->line_to(linex0+rect.get_width()-margin_x,liney0-height/2);
ctx->stroke();
}
}while(sbuffer->iter_forward_to_context_class_toggle(i, "hline") && i<end);
/* draw selection rect, if there is any */
if(active_state == NB_MODE_SELECT) {
int bx, by;
window_to_buffer_coords(Gtk::TEXT_WINDOW_WIDGET,0,0,bx,by);
ctx->save();
ctx->set_line_width(2.0);
ctx->set_source_rgba(.627,.659,.75,1);
ctx->rectangle(sel_x0-bx,sel_y0-by,sel_x1-sel_x0,sel_y1-sel_y0);
ctx->set_dash(std::valarray<double>({2.0,2.0}),0.0);
ctx->stroke();
ctx->restore();
}
return true;
}
void CNotebook::on_highlight_updated(Gtk::TextBuffer::iterator &start, Gtk::TextBuffer::iterator &end)
{
//printf("relight %d %d\n",start.get_offset(),end.get_offset());
std::pair<Glib::ustring,Glib::RefPtr<Gtk::TextTag> > extratags[]
= { {"extra-space", tag_extra_space},
{"blockquote-text", tag_blockquote},
{"hline", tag_invisible},
{"mono", tag_mono} };
for(auto &[cclass,ttag] : extratags) {
Gtk::TextBuffer::iterator i = start;
do {
Gtk::TextBuffer::iterator next = i;
if(!sbuffer->iter_forward_to_context_class_toggle(next, cclass)) next=end;
if(sbuffer->iter_has_context_class(i, cclass)) {
sbuffer->apply_tag(ttag, i, next);
} else {
sbuffer->remove_tag(ttag, i, next);
}
i=next;
} while(i<end);
}
/* TODO: this makes some widgets flicker when they shouldn't. */
/* We really shouldn't clean up a span unless it changed,
* but need to solve the *asdf*ghjk* middle * being part of
* both prox tags problem */
/* probably:
* (1) walk the whole region, clear prox tags that no longer
* are overlapped by an exactly matching prox context;
* (2) walk the whole region, instantiate all prox contexts
* that are not already overlapped by an exactly matching
* prox tag.
* This ignores the case that a prox region has been
* EXACTLY replaced by an incompatible one, but whatevs. */
CleanUpSpan(start,end);
Gtk::TextBuffer::iterator i = start;
do {
Gtk::TextBuffer::iterator next = i;
if(!sbuffer->iter_forward_to_context_class_toggle(next, "prox")) next=end;
if(sbuffer->iter_has_context_class(i, "prox")) {
if(!i.has_tag(tag_proximity)) {
/* initialise tag by leaving if necessary */
Gtk::TextIter old_iter = sbuffer->get_iter_at_mark(last_position);
if(old_iter.compare(i)<0 || old_iter.compare(next)>0) {
PushIter(start);
PushIter(end);
on_leave_region(i,next);
end=PopIter();
start=PopIter();
}
}
sbuffer->apply_tag(tag_proximity, i, next);
} else {
/* nothing to do \o/ */
}
i=next;
} while(i<end);
}
Glib::RefPtr<Gtk::TextMark> CNotebook::PushIter(Gtk::TextIter i)
{
iter_stack.push(sbuffer->create_mark(i,true));
return iter_stack.top();
}
Gtk::TextIter CNotebook::PopIter()
{
Glib::RefPtr<Gtk::TextMark> m = iter_stack.top();
iter_stack.pop();
Gtk::TextIter ret = sbuffer->get_iter_at_mark(m);
sbuffer->delete_mark(m);
return ret;
}
void CNotebook::DebugTags(Gtk::TextBuffer::iterator &start, Gtk::TextBuffer::iterator &end)
{
std::map<GtkTextTag*,char> known_tags;
std::map<GtkTextTag*,Glib::ustring> tag_names;
char lastid='A';
for(auto i=start;i<end;++i) {
std::string taglist;
std::vector<Glib::RefPtr<Gtk::TextTag> > tags = i.get_tags();
for(auto &t : tags) {
if(known_tags.count(t->gobj())) {
taglist += known_tags[t->gobj()];
} else {
taglist += lastid;
known_tags[t->gobj()] = lastid++;
tag_names[t->gobj()] = t->property_name().get_value();
}
}
printf("'%lc' %04X %s\n",i.get_char(),i.get_char(),taglist.c_str());
}
}
/* Queue creation of a new child anchor at the position indicated by the mark.
* The deferral may be necessary because insertion invalidates all iterators. */
void CNotebook::QueueChildAnchor(Glib::RefPtr<Gtk::TextMark> mstart)
{
/* once the anchor is created, syntax highlighting will recalculate, eventually
* calling this function again from the start */
auto s = Glib::IdleSource::create();
s->connect(sigc::slot<bool>( [mstart,this]() {
Gtk::TextIter start = sbuffer->get_iter_at_mark(mstart);
if(!start.get_child_anchor()) {
sbuffer->create_child_anchor(start);
}
/* We may have entered the region between the issuance of the original command
* and the IdleSource being processed, which would result in the second pass
* that is supposed to actually attach the widget not happening.
*
* To prevent this resulting in a displayed [X], start with the anchor hidden. */
start = sbuffer->get_iter_at_mark(mstart);
auto j = start; ++j;
sbuffer->apply_tag(tag_hidden,start,j);
sbuffer->apply_tag(tag_is_anchor,start,j);
sbuffer->delete_mark(mstart);
return false;
}));
s->attach();
}
void CNotebook::RenderToWidget(Glib::ustring wtype, Gtk::TextBuffer::iterator &start, Gtk::TextBuffer::iterator &end)
{
// Debug output if necessary
DMPRINTF("rtw %s: %d, %d \n",wtype.c_str(),start.get_line_offset(),end.get_line_offset());
#ifdef _DEBUG_MOTION_
Gtk::TextBuffer::iterator s1=start, e1=end;
s1.backward_line(); s1.forward_line();
e1.forward_line(); e1.backward_char();
DebugTags(s1,e1);
#endif
if(wtype=="checkbox") {
Gtk::TextIter i=start;
++i;
if(i.get_char()=='[') ++i;
bool is_checked = (i.get_char()=='x'||i.get_char()=='X');
/* create a mark to save the control's starting position */
Glib::RefPtr<Gtk::TextMark> mstart = sbuffer->create_mark(start,true);
PushIter(end);
Glib::RefPtr<Gtk::TextBuffer::ChildAnchor> anch;
if(!(anch=start.get_child_anchor())) {
/* we haven't set up a child anchor yet, so we need to queue the creation of one */
QueueChildAnchor(mstart);
} else {
auto j = start; ++j;
sbuffer->remove_tag(tag_hidden,start,j);
// shift baseline for gtk checkbox widget
sbuffer->apply_tag(GetBaselineTag(2),start,j);
Gtk::CheckButton *b = new Gtk::CheckButton();
if(is_checked) b->set_active(true);
b->property_can_focus().set_value(false);
b->property_active().signal_changed().connect(sigc::slot<void>( [b,mstart,this]() {
Gtk::TextIter i = sbuffer->get_iter_at_mark(mstart);
++i; ++i;
if(b->get_active())
i=sbuffer->insert(i,"x");
else
i=sbuffer->insert(i," ");
Gtk::TextIter j=i; ++j;
sbuffer->erase(i,j);
} ));
/* destroy the mark if the widget is unmapped */
b->signal_unmap().connect(sigc::slot<void>( [mstart,this]() {
/* need to defer the destruction due to mysterious interactions with signal chain */
auto s = Glib::IdleSource::create();
s->connect(sigc::slot<bool>( [mstart,this]() {
sbuffer->delete_mark(mstart);
return false;
}));
s->attach();
}));
Gtk::manage(b);
add_child_at_anchor(*b,anch);
b->show();
}
end=PopIter();
start=sbuffer->get_iter_at_mark(mstart);
} else if(wtype=="image") {
Glib::RefPtr<Gtk::TextBuffer::ChildAnchor> anch;
if(!(anch=start.get_child_anchor())) {
/* we haven't set up a child anchor yet, so we need to queue the creation of one */
Glib::RefPtr<Gtk::TextMark> mstart = sbuffer->create_mark(start,true);
QueueChildAnchor(mstart);
} else {
auto j = start; ++j;
sbuffer->remove_tag(tag_hidden,start,j);
/* the worst thing that could happen is that we go to the end and URL becomes empty */
auto urlstart = j;
sbuffer->iter_forward_to_context_class_toggle(urlstart,"url");
auto urlend = urlstart;
sbuffer->iter_forward_to_context_class_toggle(urlend,"url");
Gtk::Image *d = new Gtk::Image(urlstart.get_text(urlend));
Gtk::manage(d);
//sbuffer->apply_tag(GetBaselineTag(d->GetBaseline()),start,j);
add_child_at_anchor(*d,anch);
d->show();
}
}
#if defined (HAVE_LASEM) || defined (HAVE_CLATEXMATH)
else if(wtype=="latex") {
Glib::RefPtr<Gtk::TextBuffer::ChildAnchor> anch;
if(!(anch=start.get_child_anchor())) {
/* we haven't set up a child anchor yet, so we need to queue the creation of one */
Glib::RefPtr<Gtk::TextMark> mstart = sbuffer->create_mark(start,true);
QueueChildAnchor(mstart);
} else {
auto j = start; ++j;
sbuffer->remove_tag(tag_hidden,start,j);
CLatexWidget *d = new CLatexWidget(get_window(Gtk::TEXT_WINDOW_TEXT),sbuffer->get_text(start,end,true),get_style_context()->get_color());
Gtk::manage(d);
sbuffer->apply_tag(GetBaselineTag(d->GetBaseline()),start,j);
add_child_at_anchor(*d,anch);
d->show();
}
}
#endif
}
Glib::RefPtr<Gtk::TextTag> CNotebook::GetBaselineTag(int baseline)
{
if(!baseline_tags.count(baseline)) {
auto t = sbuffer->create_tag();
t->property_rise().set_value(-PANGO_SCALE*baseline);
baseline_tags[baseline]=t;
}
return baseline_tags[baseline];
}
void CNotebook::UnrenderWidgets(Gtk::TextBuffer::iterator &start, Gtk::TextBuffer::iterator &end)
{
if(start.get_child_anchor()) {
auto ws = start.get_child_anchor()->get_widgets();
for(Gtk::Widget *w : ws) {
delete w;
}
auto j = start; ++j;
sbuffer->apply_tag(tag_hidden,start,j);
/*PushIter(end);
Gtk::TextBuffer::iterator start_old = start;
++start;
start=sbuffer->erase(start_old,start);
end=PopIter();*/
}
}
/* Remove widget child anchors and proximity-related tags in span. */
void CNotebook::CleanUpSpan(Gtk::TextBuffer::iterator &start, Gtk::TextBuffer::iterator &end)
{
DMPRINTF("start cleaning %d %d\n",start.get_offset(),end.get_offset());
/* PASS 1: Clean any tag_proximity regions that disappeared. */
PushIter(start);
Gtk::TextBuffer::iterator i = start;
do {
Gtk::TextBuffer::iterator next = i;
if(!next.forward_to_tag_toggle(tag_proximity) || next>end) next=end;
Gtk::TextIter ic=next, nextc=i;
sbuffer->iter_backward_to_context_class_toggle(ic,"prox");
sbuffer->iter_forward_to_context_class_toggle(nextc,"prox");
if(i.has_tag(tag_proximity) && (ic!=i || nextc!=next)) {
DMPRINTF("clean old prox region %d %d\n",i.get_offset(),next.get_offset());
std::pair<Glib::ustring,Glib::RefPtr<Gtk::TextTag> > volatile_tags[]
= { {"invisible", tag_hidden} };
for(auto &[cclass,ttag] : volatile_tags) {
sbuffer->remove_tag(ttag, i, next);
}
sbuffer->remove_tag(tag_proximity,i,next);
if(i.get_child_anchor()) {
PushIter(end);
PushIter(next);
next=i;
++next;
start=sbuffer->erase(i,next);
next=PopIter();
end=PopIter();
}
}
i=next;
} while(i<end);
start=PopIter();
/* PASS 2: Clean any leftover internal child anchors from tag_proximity regions that got merged. */
PushIter(start);
i = start;
do {
Gtk::TextBuffer::iterator next = i;
if(!next.forward_to_tag_toggle(tag_is_anchor) || next>end) next=end;
Gtk::TextIter ic=next;
sbuffer->iter_backward_to_context_class_toggle(ic,"prox");
if(i.has_tag(tag_is_anchor) && (ic!=i)) {
DMPRINTF("clean straggler tag %d %d\n",i.get_offset(),next.get_offset());
if(i.get_child_anchor()) {
PushIter(end);
PushIter(next);
next=i;
++next;
start=sbuffer->erase(i,next);
next=PopIter();
end=PopIter();
}
}
i=next;
} while(i<end);
start=PopIter();
}
void CNotebook::on_enter_region(Gtk::TextBuffer::iterator &start, Gtk::TextBuffer::iterator &end)
{
DMPRINTF("enter region: %d %d\n",start.get_offset(),end.get_offset());
std::pair<Glib::ustring,Glib::RefPtr<Gtk::TextTag> > volatile_tags[]
= { {"invisible", tag_hidden} };
for(auto &[cclass,ttag] : volatile_tags) {
sbuffer->remove_tag(ttag, start, end);
}
for(auto &s : renderable_classes) {
if(sbuffer->iter_has_context_class(start, s)) {
UnrenderWidgets(start,end);
}
}
}
void CNotebook::on_leave_region(Gtk::TextBuffer::iterator &start, Gtk::TextBuffer::iterator &end)
{
DMPRINTF("leave region: %d %d\n",start.get_offset(),end.get_offset());
std::pair<Glib::ustring,Glib::RefPtr<Gtk::TextTag> > volatile_tags[]
= { {"invisible", tag_hidden} };
for(auto &[cclass,ttag] : volatile_tags) {
Gtk::TextBuffer::iterator i = start;
do {
Gtk::TextBuffer::iterator next = i;
if(!sbuffer->iter_forward_to_context_class_toggle(next, cclass)) next=end;
if(sbuffer->iter_has_context_class(i, cclass)) {
sbuffer->apply_tag(ttag, i, next);
} else {
sbuffer->remove_tag(ttag, i, next);
}
i=next;
} while(i<end);
}
for(auto &s : renderable_classes) {
if(sbuffer->iter_has_context_class(start, s)) {
UnrenderWidgets(start,end); // just in case
RenderToWidget(s,start,end);
}
}
}
bool GetTagExtents(Gtk::TextIter t, Glib::RefPtr<Gtk::TextTag> tag, Gtk::TextIter &left, Gtk::TextIter &right)
{
if(t.starts_tag(tag)) {
left=t;
t.forward_to_tag_toggle(tag);
right=t;
return true;
}
if(t.ends_tag(tag)) {
right=t;
t.backward_to_tag_toggle(tag);
left=t;
return true;
}
if(t.has_tag(tag)) {
left=t;
left.backward_to_tag_toggle(tag);
right=t;
right.forward_to_tag_toggle(tag);
return true;
}
return false;
}
void CNotebook::on_move_cursor()
{
/* selecting text is mostly frustrating if the text layout
* changes due to hiding/unhiding while doing it */
if(sbuffer->get_has_selection()) return;
auto s = Glib::IdleSource::create();
s->connect(sigc::slot<bool>( [this]() {
Gtk::TextIter new_iter = sbuffer->get_iter_at_mark(sbuffer->get_insert());
Gtk::TextIter old_iter = sbuffer->get_iter_at_mark(last_position);
//printf("old: %d, new: %d\n", old_iter.get_offset(), new_iter.get_offset());
/*auto v = new_iter.get_marks();
printf("%d marks here: ",v.size());
for(auto &m : v) printf("%s ",m->get_name().c_str());
printf("\n");*/
Gtk::TextIter old_left, old_right, new_left, new_right;
bool old_valid = GetTagExtents(old_iter,tag_proximity,old_left,old_right);
bool new_valid = GetTagExtents(new_iter,tag_proximity,new_left,new_right);
bool from_right = new_valid && new_iter.compare(new_left)>0//old_iter.compare(new_iter)>0
&& (!latest_keyval || latest_keyval == GDK_KEY_Left ||
latest_keyval == GDK_KEY_Up || latest_keyval == GDK_KEY_Down);
Glib::RefPtr<Gtk::TextMark> move_to;
if(old_valid) {
if(new_valid) {
if(new_iter.compare(old_left)<0 || new_iter.compare(old_right)>0) {
if(from_right) {
if(new_iter.has_tag(tag_hidden)) {
new_iter.forward_to_tag_toggle(tag_hidden);
move_to = sbuffer->create_mark(new_iter,false);
}
}
/* moved into a different prox region. signal both. */
PushIter(new_left);
PushIter(new_right);
on_leave_region(old_left,old_right);
new_right=PopIter();
new_left=PopIter();
on_enter_region(new_left,new_right);
} else if(new_iter==old_iter) {
/* we may have deleted right into a prox region's boundary. signal to be safe. */
DMPRINTF("deletion enter\n");
on_enter_region(new_left,new_right);
}
/* otherwise, we stayed in the same one. no signals needed */
} else {
on_leave_region(old_left,old_right);
}
} else if(new_valid) {
if(from_right) {
if(new_iter.has_tag(tag_hidden)) {
new_iter.forward_to_tag_toggle(tag_hidden);
move_to = sbuffer->create_mark(new_iter,false);
}
}
on_enter_region(new_left,new_right);
}
if(move_to) {
//printf("move right: %d\n",latest_keyval);
Gtk::TextIter t = sbuffer->get_iter_at_mark(move_to);
Gtk::TextIter ins = sbuffer->get_iter_at_mark(sbuffer->get_insert());
Gtk::TextIter sb = sbuffer->get_iter_at_mark(sbuffer->get_mark("selection_bound"));
sbuffer->move_mark_by_name("insert",t);
if(sb==ins) sbuffer->move_mark_by_name("selection_bound",t);
sbuffer->delete_mark(move_to);
/*auto s = Glib::IdleSource::create();
s->connect(sigc::slot<bool>( [move_to,this]() {
Gtk::TextIter t = sbuffer->get_iter_at_mark(move_to);
Gtk::TextIter ins = sbuffer->get_iter_at_mark(sbuffer->get_insert());
Gtk::TextIter sb = sbuffer->get_iter_at_mark(sbuffer->get_mark("selection_bound"));
sbuffer->move_mark_by_name("insert",t);
if(sb==ins) sbuffer->move_mark_by_name("selection_bound",t);
sbuffer->delete_mark(move_to);
return false;
}));
s->attach();*/
}
sbuffer->move_mark(last_position, sbuffer->get_iter_at_mark(sbuffer->get_insert()));//new_iter);
return false;
}));
s->attach();
}
void CNotebook::Widget2Doc(double in_x, double in_y, double &out_x, double &out_y)
{
int bx, by;
window_to_buffer_coords(Gtk::TEXT_WINDOW_WIDGET,0,0,bx,by);
out_x = in_x+bx;
out_y = in_y+by;
}
bool CNotebook::on_button_press(GdkEventButton *e)
{
latest_keyval=0;
GdkDevice *d = gdk_event_get_source_device((GdkEvent*)e);
if(!devicemodes.count(d)) {
if(gdk_device_get_n_axes(d)>4) {
// assume it's a pen
devicemodes[d] = NB_MODE_DRAW;
} else {
devicemodes[d] = NB_MODE_TEXT;
}
}
switch(devicemodes[d]) {
case NB_MODE_TEXT:
return false;
case NB_MODE_DRAW: {
double x,y;
Widget2Doc(e->x,e->y,x,y);
//printf("sig: %f %f %f %f\n",e->x, e->y, x,y);
active.Reset();
//active.r=active.g=active.b=0; active.a=1;
active.Append(x,y, stroke_width*ReadPressure((GdkEvent*)e));
active_state = NB_STATE_DRAW;
gdk_window_set_event_compression(e->window,false);
grab_focus();
return true;
}
case NB_MODE_ERASE: {
active_state = NB_STATE_ERASE;
grab_focus();
return true;
}
case NB_MODE_SELECT: {
double x,y;
Widget2Doc(e->x,e->y,x,y);
active_state = NB_STATE_SELECT;
grab_focus();
sel_x0=x;
sel_y0=y;
return true;
}
default: return false;
}
}
bool CNotebook::on_button_release(GdkEventButton *e)
{
gdk_window_set_event_compression(e->window,true);
if(active_state!=NB_STATE_NOTHING) {
if(active_state==NB_STATE_DRAW) {
sbuffer->begin_not_undoable_action();
active.Simplify();
CommitStroke();
sbuffer->end_not_undoable_action();
} else if(active_state==NB_STATE_SELECT) {
double x,y;
Widget2Doc(e->x,e->y,x,y);
if(sel_x0>x) std::swap(sel_x0,x);
if(sel_y0>y) std::swap(sel_y0,y);
SelectBox(sel_x0,x,sel_y0,y);
queue_draw();
}
active_state=NB_STATE_NOTHING;
return true;
}
return false;
}
bool CNotebook::on_motion_notify(GdkEventMotion *e)
{
if(active_state==NB_STATE_DRAW) {
double x,y,p;
Widget2Doc(e->x,e->y,x,y);
p = stroke_width*ReadPressure((GdkEvent*)e);
/* dynamically toggle event compression */
float xprev = 0.0f;
float yprev = 0.0f;
active.GetHead(xprev,yprev);
float curve = abs(active.GetHeadCurvatureWrt(x,y));
float delta = sqrt ( (xprev-x)*(xprev-x)+(yprev-y)*(yprev-y) );
if(delta<0.6) {
/* reject if we are too close to previous head */
gdk_window_set_event_compression(e->window,true);
return false;
}
attention_ewma = sqrt(curve)+(delta>4?0.2:0);
if(attention_ewma<0.32) {
//printf("compression on\n");
//p=1;
gdk_window_set_event_compression(e->window,true);
} else if(attention_ewma>0.32){
//printf("compression off\n");
//%%p=3;
gdk_window_set_event_compression(e->window,false);
}
//p=attention_ewma;
active.Append(x,y,p);
int bx, by;
window_to_buffer_coords(Gtk::TEXT_WINDOW_WIDGET,0,0,bx,by);
active.Render(overlay_ctx,bx,by,active.xcoords.size()-1);
overlay.queue_draw_area(e->x-delta-p,e->y-delta-p,2*delta+4*p,2*delta+4*p);
} else if (active_state==NB_STATE_ERASE) {
double x,y;