mash/view.h

view.h

#pragma once

#define THUMB_WIDTH 14#define THUMB_FRAC 0.15625

#define JUMP_FLAG_TOP 1#define JUMP_FLAG_AFFECT_COLUMN 2

template <typename T>struct Vector { static constexpr int INLINE_SIZE = 16;

int cap; int size; T *data; T stack[INLINE_SIZE];

Vector() { cap = INLINE_SIZE; size = INLINE_SIZE; data = &stack[0]; stack = {0}; } ~Vector() { if (data && data != &stack[0]) delete[] data; }

void resize(int sz) { int new_cap = cap; while (sz > new_cap) new_cap *= 2;

if (new_cap <= cap) { size = sz; return; }

T *new_data = new T[new_cap](); if (size > 0) memcpy(new_data, data, size * sizeof(T)); if (data != &stack[0]) delete[] data;

data = new_data; cap = new_cap; size = sz; }};

struct File { char os_handle[16];

char *data; int64_t total_size;

int open(const char *name); void close();};

struct Syntax_Mode { char accepted_min[8]; // eg. "0Aa_" char accepted_max[8]; // eg. "9Zz_" int fore_color_idx; int back_color_idx; int glyphset; // 0 = regular, 1 = bold, 2 = italic, 3 = bold italic int modifier; // 0 = normal, 1 = strikethrough, 2 = underline};

struct Syntax_Token { char *str; int len; char required_mode_min[4]; // eg. 0, 2 char required_mode_max[4]; // eg. 0, -1 int mode_of; int mode_switch;

int matches; // modified by update_highlighter()};

struct Formatter { static constexpr int N_MODES = 32; Syntax_Mode modes[N_MODES];

static constexpr int N_COLORS = 32; uint32_t colors[N_COLORS];

uint32_t active_thumb_color; uint32_t hovered_thumb_color; uint32_t inactive_thumb_color;

int cur_mode;

void get_current_attrs(uint32_t& fore, uint32_t& back, uint32_t& glyph_off, uint32_t& modifier) { Syntax_Mode& mode = modes[cur_mode]; fore = colors[mode.fore_color_idx]; back = colors[mode.back_color_idx]; glyph_off = mode.glyphset * 0x60; modifier = mode.modifier; }

void update_highlighter(File *file, int64_t offset, char c);};

struct Input_State { int left_flags; int right_flags; int column; int row; int x, y; int mod_flags; int thumb_inner_pos; int thumb_flags;

void advance() { left_flags &= 1; left_flags |= left_flags << 1; right_flags &= 1; right_flags |= right_flags << 1; }};

struct Cell { uint32_t glyph; uint32_t modifier; uint32_t foreground; uint32_t background;};

struct Grid { int rows; int cols; int64_t row_offset; int64_t col_offset; int64_t primary_cursor; int64_t secondary_cursor;

int rel_caret_col; int rel_caret_row; int target_column;

int last_line_num_gap; bool text_held;

int mode_at_current_line;

int spaces_per_tab;

int64_t grid_offset; int64_t end_grid_offset; // Vector<int64_t> line_offsets;

void render_into(File *file, Cell *cells, Formatter *formatter, Input_State& mouse, int wnd_width, int wnd_height); void move_cursor_vertically(File *file, int dir, int target_col); void adjust_offsets(File *file, int64_t move_down, int64_t move_right); int64_t jump_to_offset(File *file, int64_t offset, int flags);};

struct View { Grid *grid; File *file; Formatter *formatter; int font_render_idx;};