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/**
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* Copyright (c) 2007-2012, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @file view_curses.hh
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*/
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#ifndef __view_curses_hh
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#define __view_curses_hh
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#include "config.h"
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#include <zlib.h>
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#include <math.h>
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#include <stdint.h>
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#include <limits.h>
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#include <signal.h>
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#include <sys/time.h>
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#if defined HAVE_NCURSESW_CURSES_H
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# include <ncursesw/curses.h>
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#elif defined HAVE_NCURSESW_H
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# include <ncursesw.h>
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#elif defined HAVE_NCURSES_CURSES_H
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# include <ncurses/curses.h>
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#elif defined HAVE_NCURSES_H
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# include <ncurses.h>
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#elif defined HAVE_CURSES_H
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# include <curses.h>
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#else
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# error "SysV or X/Open-compatible Curses header file required"
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#endif
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#include <map>
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#include <string>
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#include <vector>
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#include <functional>
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#include <algorithm>
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#include "lnav_log.hh"
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#include "attr_line.hh"
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#define KEY_CTRL_G 7
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#define KEY_CTRL_L 12
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#define KEY_CTRL_P 16
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#define KEY_CTRL_R 18
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#define KEY_CTRL_W 23
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#define KEY_CTRL_RBRACKET 0x1d
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class view_curses;
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/**
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* An RAII class that initializes and deinitializes curses.
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*/
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class screen_curses : public log_crash_recoverer {
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public:
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void log_crash_recover() override {
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endwin();
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};
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screen_curses()
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: sc_main_window(initscr()) {
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};
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virtual ~screen_curses()
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{
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endwin();
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};
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WINDOW *get_window() { return this->sc_main_window; };
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private:
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WINDOW *sc_main_window;
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};
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class ui_periodic_timer {
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public:
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static const struct itimerval INTERVAL;
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static ui_periodic_timer &singleton();
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bool time_to_update(sig_atomic_t &counter) const {
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if (this->upt_counter != counter) {
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counter = this->upt_counter;
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return true;
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}
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return false;
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};
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void start_fade(sig_atomic_t &counter, size_t decay) {
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counter = this->upt_counter + decay;
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};
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int fade_diff(sig_atomic_t &counter) {
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if (this->upt_counter >= counter) {
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return 0;
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}
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return counter - this->upt_counter;
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};
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private:
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ui_periodic_timer();
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static void sigalrm(int sig);
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volatile sig_atomic_t upt_counter;
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};
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class alerter {
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public:
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static alerter &singleton();
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void enabled(bool enable) { this->a_enabled = enable; };
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void chime(void) {
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if (!this->a_enabled) {
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return;
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}
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if (this->a_do_flash) {
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::flash();
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}
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this->a_do_flash = false;
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};
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void new_input(int ch) {
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if (this->a_last_input != ch) {
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this->a_do_flash = true;
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}
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this->a_last_input = ch;
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};
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private:
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alerter() : a_enabled(true), a_do_flash(true), a_last_input(-1) { };
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bool a_enabled;
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bool a_do_flash;
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int a_last_input;
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};
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/**
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* Class that encapsulates a method to execute and the object on which to
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* execute it.
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*
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* @param _Sender The type of object that will be triggering an action.
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*/
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template<class _Sender>
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class view_action {
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public:
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/**
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*
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* @param _Receiver The type of object that will be triggered by an action.
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*/
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template<class _Receiver>
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class mem_functor_t {
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public:
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mem_functor_t(_Receiver &receiver,
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void(_Receiver::*selector)(_Sender *))
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: mf_receiver(receiver),
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mf_selector(selector) { };
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void operator()(_Sender *sender) const
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{
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(this->mf_receiver.*mf_selector)(sender);
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};
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static void invoke(mem_functor_t *self, _Sender *sender)
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{
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(*self)(sender);
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};
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private:
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_Receiver & mf_receiver;
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void (_Receiver::*mf_selector)(_Sender *);
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};
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class broadcaster
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: public std::vector<view_action> {
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public:
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broadcaster()
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: b_functor(*this, &broadcaster::invoke) { };
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virtual ~broadcaster() = default;
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void invoke(_Sender *sender)
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{
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typename std::vector<view_action>::iterator iter;
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for (iter = this->begin(); iter != this->end(); ++iter) {
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(*iter).invoke(sender);
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}
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};
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mem_functor_t<broadcaster> *get_functor()
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{
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return &this->b_functor;
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};
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private:
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mem_functor_t<broadcaster> b_functor;
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};
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/**
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* @param receiver The object to pass as the first argument to the selector
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* function.
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* @param selector The function to execute. The function should take two
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* parameters, the first being the value of the receiver pointer and the
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* second being the sender pointer as passed to invoke().
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*/
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view_action(void(*invoker)(void *, _Sender *) = nullptr)
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: va_functor(nullptr),
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va_invoker(invoker) { };
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template<class _Receiver>
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view_action(mem_functor_t<_Receiver> *mf)
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: va_functor(mf),
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va_invoker((void(*) (void *, _Sender *))
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mem_functor_t<_Receiver>::invoke) { };
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/**
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* Performs a shallow copy of another view_action.
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*
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* @param va The view_action to copy the receiver and selector pointers
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* from.
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*/
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view_action(const view_action &va)
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: va_functor(va.va_functor),
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va_invoker(va.va_invoker) { };
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~view_action() { };
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/**
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* @param rhs The view_action to shallow copy.
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* @return *this
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*/
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view_action &operator=(const view_action &rhs)
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{
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this->va_functor = rhs.va_functor;
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this->va_invoker = rhs.va_invoker;
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return *this;
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};
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/**
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* Invoke the action by calling the selector function, if one is set.
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*
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* @param sender Pointer to the object that called this method.
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*/
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void invoke(_Sender *sender)
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{
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if (this->va_invoker != NULL) {
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this->va_invoker(this->va_functor, sender);
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}
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};
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private:
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/** The object to pass as the first argument to the selector function.*/
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void *va_functor;
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/** The function to call when this action is invoke()'d. */
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void (*va_invoker)(void *functor, _Sender *sender);
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};
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struct rgb_color {
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static bool from_str(const string_fragment &color,
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rgb_color &rgb_out,
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std::string &errmsg);
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explicit rgb_color(short r = -1, short g = -1, short b = -1)
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: rc_r(r), rc_g(g), rc_b(b) {
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}
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bool empty() const {
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return this->rc_r == -1 && this->rc_g == -1 && this->rc_b == -1;
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}
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short rc_r;
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short rc_g;
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short rc_b;
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};
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struct lab_color {
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lab_color() : lc_l(0), lc_a(0), lc_b(0) {
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};
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lab_color(const rgb_color &rgb) {
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double r = rgb.rc_r / 255.0,
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g = rgb.rc_g / 255.0,
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b = rgb.rc_b / 255.0,
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x, y, z;
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r = (r > 0.04045) ? pow((r + 0.055) / 1.055, 2.4) : r / 12.92;
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g = (g > 0.04045) ? pow((g + 0.055) / 1.055, 2.4) : g / 12.92;
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b = (b > 0.04045) ? pow((b + 0.055) / 1.055, 2.4) : b / 12.92;
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x = (r * 0.4124 + g * 0.3576 + b * 0.1805) / 0.95047;
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y = (r * 0.2126 + g * 0.7152 + b * 0.0722) / 1.00000;
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z = (r * 0.0193 + g * 0.1192 + b * 0.9505) / 1.08883;
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x = (x > 0.008856) ? pow(x, 1.0/3.0) : (7.787 * x) + 16.0/116.0;
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y = (y > 0.008856) ? pow(y, 1.0/3.0) : (7.787 * y) + 16.0/116.0;
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z = (z > 0.008856) ? pow(z, 1.0/3.0) : (7.787 * z) + 16.0/116.0;
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this->lc_l = (116.0 * y) - 16;
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this->lc_a = 500.0 * (x - y);
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this->lc_b = 200.0 * (y - z);
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}
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double deltaE(const lab_color &other) const {
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double deltaL = this->lc_l - other.lc_l;
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double deltaA = this->lc_a - other.lc_a;
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double deltaB = this->lc_b - other.lc_b;
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double c1 = sqrt(this->lc_a * this->lc_a + this->lc_b * this->lc_b);
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double c2 = sqrt(other.lc_a * other.lc_a + other.lc_b * other.lc_b);
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double deltaC = c1 - c2;
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double deltaH = deltaA * deltaA + deltaB * deltaB - deltaC * deltaC;
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deltaH = deltaH < 0.0 ? 0.0 : sqrt(deltaH);
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double sc = 1.0 + 0.045 * c1;
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double sh = 1.0 + 0.015 * c1;
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double deltaLKlsl = deltaL / (1.0);
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double deltaCkcsc = deltaC / (sc);
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double deltaHkhsh = deltaH / (sh);
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double i = deltaLKlsl * deltaLKlsl + deltaCkcsc * deltaCkcsc + deltaHkhsh * deltaHkhsh;
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return i < 0.0 ? 0.0 : sqrt(i);
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}
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lab_color& operator=(const lab_color &other) {
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this->lc_l = other.lc_l;
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this->lc_a = other.lc_a;
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this->lc_b = other.lc_b;
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return *this;
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};
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double lc_l;
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double lc_a;
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double lc_b;
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};
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/**
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* Singleton used to manage the colorspace.
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*/
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class view_colors {
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public:
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static const unsigned long BASIC_COLOR_COUNT = 8;
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static const unsigned long HI_COLOR_COUNT = 6 * 3 * 3;
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static attr_t BASIC_HL_PAIRS[BASIC_COLOR_COUNT];
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/** Roles that can be mapped to curses attributes using attrs_for_role() */
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typedef enum {
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VCR_NONE = -1,
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VCR_TEXT, /*< Raw text. */
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VCR_SEARCH, /*< A search hit. */
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VCR_OK,
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VCR_ERROR, /*< An error message. */
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VCR_WARNING, /*< A warning message. */
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VCR_ALT_ROW, /*< Highlight for alternating rows in a list */
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VCR_HIDDEN,
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VCR_ADJUSTED_TIME,
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VCR_SKEWED_TIME,
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VCR_OFFSET_TIME,
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VCR_STATUS, /*< Normal status line text. */
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VCR_WARN_STATUS,
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|
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VCR_ALERT_STATUS, /*< Alert status line text. */
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VCR_ACTIVE_STATUS, /*< */
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VCR_ACTIVE_STATUS2, /*< */
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VCR_BOLD_STATUS,
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VCR_VIEW_STATUS,
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VCR_KEYWORD,
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VCR_STRING,
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VCR_COMMENT,
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VCR_VARIABLE,
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VCR_SYMBOL,
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|
VCR_RE_SPECIAL,
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VCR_RE_REPEAT,
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VCR_FILE,
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VCR_DIFF_DELETE, /*< Deleted line in a diff. */
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VCR_DIFF_ADD, /*< Added line in a diff. */
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|
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VCR_DIFF_SECTION, /*< Section marker in a diff. */
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|
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VCR_LOW_THRESHOLD,
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|
|
VCR_MED_THRESHOLD,
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|
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VCR_HIGH_THRESHOLD,
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|
|
|
|
VCR__MAX
|
|
|
|
} role_t;
|
|
|
|
|
|
|
|
/** @return A reference to the singleton. */
|
|
|
|
static view_colors &singleton();
|
|
|
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|
|
|
/**
|
|
|
|
* Performs curses-specific initialization. The other methods can be
|
|
|
|
* called before this method, but the returned attributes cannot be used
|
|
|
|
* with curses code until this method is called.
|
|
|
|
*/
|
|
|
|
static void init(void);
|
|
|
|
|
|
|
|
void init_roles(int color_pair_base);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @param role The role to retrieve character attributes for.
|
|
|
|
* @return The attributes to use for the given role.
|
|
|
|
*/
|
|
|
|
attr_t attrs_for_role(role_t role) const
|
|
|
|
{
|
|
|
|
require(role >= 0);
|
|
|
|
require(role < VCR__MAX);
|
|
|
|
|
|
|
|
return this->vc_role_colors[role];
|
|
|
|
};
|
|
|
|
|
|
|
|
attr_t reverse_attrs_for_role(role_t role) const
|
|
|
|
{
|
|
|
|
require(role >= 0);
|
|
|
|
require(role < VCR__MAX);
|
|
|
|
|
|
|
|
return this->vc_role_reverse_colors[role];
|
|
|
|
};
|
|
|
|
|
|
|
|
attr_t attrs_for_ident(const char *str, size_t len) const {
|
|
|
|
unsigned long index = crc32(1, (const Bytef*)str, len);
|
|
|
|
attr_t retval;
|
|
|
|
|
|
|
|
if (COLORS >= 256) {
|
|
|
|
unsigned long offset = index % HI_COLOR_COUNT;
|
|
|
|
retval = COLOR_PAIR(VC_ANSI_END + offset);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
retval = BASIC_HL_PAIRS[index % BASIC_COLOR_COUNT];
|
|
|
|
}
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
};
|
|
|
|
|
|
|
|
attr_t attrs_for_ident(const std::string &str) const {
|
|
|
|
return this->attrs_for_ident(str.c_str(), str.length());
|
|
|
|
};
|
|
|
|
|
|
|
|
int ensure_color_pair(const rgb_color &fg, const rgb_color &bg);
|
|
|
|
|
|
|
|
static inline int ansi_color_pair_index(int fg, int bg)
|
|
|
|
{
|
|
|
|
return VC_ANSI_START + ((fg * 8) + bg);
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline attr_t ansi_color_pair(int fg, int bg)
|
|
|
|
{
|
|
|
|
return COLOR_PAIR(ansi_color_pair_index(fg, bg));
|
|
|
|
};
|
|
|
|
|
|
|
|
enum {
|
|
|
|
VC_ANSI_START = 0,
|
|
|
|
VC_ANSI_END = VC_ANSI_START + (8 * 8),
|
|
|
|
};
|
|
|
|
|
|
|
|
private:
|
|
|
|
|
|
|
|
/** Private constructor that initializes the member fields. */
|
|
|
|
view_colors();
|
|
|
|
|
|
|
|
static bool initialized;
|
|
|
|
|
|
|
|
/** Map of role IDs to attribute values. */
|
|
|
|
attr_t vc_role_colors[VCR__MAX];
|
|
|
|
/** Map of role IDs to reverse-video attribute values. */
|
|
|
|
attr_t vc_role_reverse_colors[VCR__MAX];
|
|
|
|
int vc_color_pair_end;
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
enum mouse_button_t {
|
|
|
|
BUTTON_LEFT,
|
|
|
|
BUTTON_MIDDLE,
|
|
|
|
BUTTON_RIGHT,
|
|
|
|
|
|
|
|
BUTTON_SCROLL_UP,
|
|
|
|
BUTTON_SCROLL_DOWN,
|
|
|
|
};
|
|
|
|
|
|
|
|
enum mouse_button_state_t {
|
|
|
|
BUTTON_STATE_PRESSED,
|
|
|
|
BUTTON_STATE_DRAGGED,
|
|
|
|
BUTTON_STATE_RELEASED,
|
|
|
|
};
|
|
|
|
|
|
|
|
struct mouse_event {
|
|
|
|
mouse_event(mouse_button_t button = BUTTON_LEFT,
|
|
|
|
mouse_button_state_t state = BUTTON_STATE_PRESSED,
|
|
|
|
int x = -1,
|
|
|
|
int y = -1)
|
|
|
|
: me_button(button),
|
|
|
|
me_state(state),
|
|
|
|
me_x(x),
|
|
|
|
me_y(y) {
|
|
|
|
memset(&this->me_time, 0, sizeof(this->me_time));
|
|
|
|
};
|
|
|
|
|
|
|
|
mouse_button_t me_button;
|
|
|
|
mouse_button_state_t me_state;
|
|
|
|
struct timeval me_time;
|
|
|
|
int me_x;
|
|
|
|
int me_y;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Interface for "view" classes that will update a curses(3) display.
|
|
|
|
*/
|
|
|
|
class view_curses {
|
|
|
|
public:
|
|
|
|
virtual ~view_curses() { };
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Update the curses display.
|
|
|
|
*/
|
|
|
|
virtual void do_update(void) = 0;
|
|
|
|
|
|
|
|
virtual bool handle_mouse(mouse_event &me) { return false; };
|
|
|
|
|
|
|
|
static string_attr_type VC_STYLE;
|
|
|
|
static string_attr_type VC_GRAPHIC;
|
|
|
|
|
|
|
|
static void mvwattrline(WINDOW *window,
|
|
|
|
int y,
|
|
|
|
int x,
|
|
|
|
attr_line_t &al,
|
|
|
|
const struct line_range &lr,
|
|
|
|
view_colors::role_t base_role =
|
|
|
|
view_colors::VCR_TEXT);
|
|
|
|
};
|
|
|
|
#endif
|