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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-tk-lib
* Created on: 4 сент. 2017 г.
*
* lsp-tk-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-tk-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-tk-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_TK_UTIL_TEXTCURSOR_H_
#define LSP_PLUG_IN_TK_UTIL_TEXTCURSOR_H_
#ifndef LSP_PLUG_IN_TK_IMPL
#error "use <lsp-plug.in/tk/tk.h>"
#endif
namespace lsp
{
namespace tk
{
/**
* Helper to handle text cursor position and events and properly draw text cursor
*/
class TextCursor
{
protected:
enum flags_t
{
F_VISIBLE = 1 << 0,
F_REPLACE = 1 << 1,
F_SHINE = 1 << 2
};
protected:
ssize_t nLocation;
size_t nFlags;
size_t nBlinkPeriod;
Timer sTimer;
protected:
static status_t update_blink(ws::timestamp_t sched, ws::timestamp_t ts, void *arg);
virtual ssize_t limit(ssize_t value);
virtual void on_change();
virtual void on_blink();
void set_shining(bool blink = true);
public:
explicit TextCursor(Display *dpy);
virtual ~TextCursor();
public:
inline bool visible() const { return nFlags & F_VISIBLE; };
inline bool inserting() const { return !(nFlags & F_REPLACE); };
inline bool replacing() const { return nFlags & F_REPLACE; };
inline bool shining() const { return nFlags & F_SHINE; };
inline size_t blink_period() const { return nBlinkPeriod; }
inline ssize_t value() const { return nLocation; };
inline ssize_t location() const { return nLocation; };
inline ssize_t position() const { return nLocation; };
public:
void hide();
void show();
void blink(bool blink = true);
void shine(bool shine = true) { blink(shine); };
void set_visibility(bool visible = true);
void set_inserting(bool value = true);
void set_replacing(bool value = true);
void toggle_mode();
void toggle_visibility();
void set_blink_period(size_t value);
ssize_t set(ssize_t location);
ssize_t move(ssize_t distance);
inline ssize_t set_value(ssize_t location) { return set(location); };
inline ssize_t set_location(ssize_t location) { return set(location); };
inline ssize_t set_position(ssize_t location) { return set(location); };
};
} /* namespace tk */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_TK_UTIL_TEXTCURSOR_H_ */
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