137 lines
3 KiB
C++
137 lines
3 KiB
C++
#pragma once
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#include <ncurses.h>
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#include <curses.h>
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#include <fstream>
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#include <iostream>
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#define TAB_SIZE 2
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using std::string;
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typedef unsigned long long count_type;
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// Position
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struct position {
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count_type r, c;
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position operator+(count_type offset) { return {r + offset, c}; }
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};
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//// Treap
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// Treap node representation of a line
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struct line {
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count_type priority, size;
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string text;
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line *left, *right;
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line(count_type _p, string _t) : priority(_p), text(_t), size(1), left(nullptr), right(nullptr) {}
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};
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typedef std::pair<line*, line*> two_lines;
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// Treap data structure
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class Treap {
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line* root;
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count_type get_size(line* l);
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two_lines split(line *l, count_type k);
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line* join(line *a, line *b);
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line* join(two_lines two) { return join(two.first, two.second); }
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line* find(line* l, count_type k);
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public:
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Treap() { srand(120); root = nullptr; }
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line* find(count_type k);
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string get(count_type k) { return find(k)->text; }
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void clear();
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void insert(count_type k, string s);
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void append(string s) { insert(size(), s); }
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void remove(count_type k);
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void pop() { remove(size()); }
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count_type size() { return get_size(root); }
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// Treap access functions
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string get_line(count_type r, bool substitute_tab = 1);
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count_type get_tab_offset(position p);
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void set(position p, char ch);
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void insert(position p, string t);
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void remove(position p, count_type len = 1);
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void split_line(position p);
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};
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//// Selection
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class Selection {
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Treap *file;
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Treap content; // selection
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template <typename F, typename G>
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void apply_on_selection(position p, F func, G func2);
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public:
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Selection() {}
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Selection(Treap *_file) { file = _file; }
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position pos; // selection initial position
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void remove_selection(position p);
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void copy_selection(position p);
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void paste_selection(position p);
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};
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//// Editor
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#define ESC 27
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#define ENTER 10
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#define BS 127
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#define adds(s) addstr(s.c_str())
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enum mode_type { INSERT, NORMAL, SELECT };
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class Editor{
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// Editor state
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mode_type mode;
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position cur;
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count_type file_offset;
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// File
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string filename;
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Treap file;
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// Selection
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string last_find, last_replace;
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Selection selection;
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void save();
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// Printing
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void clear_line(count_type r);
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void print_line(count_type r);
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// User input
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void print_input(string text);
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template <typename F>
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string get_input(string prompt, F func);
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string get_string(string prompt);
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count_type get_number(string prompt);
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// Movement
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void jump_line_end();
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void move(position p) { ::move(p.r, p.c); }
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void move_cursor(char ch);
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void jump(count_type r);
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void jump(position p) { jump(p.r); cur.c = p.c; }
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// Find and replace
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std::pair<bool, position> find(string text);
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void replace(position p, count_type length, string text) { file.remove(p, length); file.insert(p, text); }
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public:
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Editor(string _filename, Treap &_file) {
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mode = NORMAL;
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cur = {0, 0};
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file_offset = 0;
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filename = _filename;
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file = _file;
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selection = Selection(&file);
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}
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void print_file(count_type start = 0);
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// The big function
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bool take_action();
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};
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