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#include "line.h"
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "syntax.h"
int row_x_to_display_x(line_t *line, int x)
{
int display_x = 0;
int j;
for (j = 0; j < x; j++) {
if (line->chars[j] == '\t')
display_x += (TAB_WIDTH - 1) - (display_x % TAB_WIDTH);
display_x++;
}
return display_x;
}
int row_display_x_to_x(line_t *line, int display_x)
{
int current_display_x = 0;
int result_x;
for (result_x = 0; result_x < line->size; result_x++) {
if (line->chars[result_x] == '\t')
result_x += (TAB_WIDTH - 1) - (current_display_x % TAB_WIDTH);
result_x++;
if (current_display_x > display_x)
return result_x;
}
return result_x;
}
void editor_update_line(struct editor_state *editor, line_t *line)
{
int tabs = 0;
int j;
for (j = 0; j < line->size; j++)
if (line->chars[j] == '\t') tabs++;
free(line->render);
line->render = malloc(line->size + tabs * (TAB_WIDTH - 1) + 1);
int index = 0;
for (j = 0; j < line->size; j++) {
if (line->chars[j] == '\t') {
line->render[index++] = ' ';
while (index % TAB_WIDTH != 0) line->render[index++] = ' ';
} else {
line->render[index++] = line->chars[j];
}
}
line->render[index] = '\0';
line->render_size = index;
editor_update_syntax(editor, line);
}
void editor_insert_line(struct editor_state *editor, int at, char* string, size_t length)
{
if (at < 0 || at > editor->num_lines)
return;
editor->lines = realloc(editor->lines, sizeof(line_t) * (editor->num_lines + 1));
memmove(&editor->lines[at + 1], &editor->lines[at], sizeof(line_t) * (editor->num_lines - at));
for (int j = at + 1; j <= editor->num_lines; j++)
editor->lines[at].index++;
editor->lines[at].index = at;
editor->lines[at].size = length;
editor->lines[at].chars = malloc(length + 1);
memcpy(editor->lines[at].chars, string, length);
editor->lines[at].chars[length] = '\0';
editor->lines[at].render_size = 0;
editor->lines[at].render = NULL;
editor->lines[at].highlight = NULL;
editor->lines[at].highlight_open_comment = 0;
editor_update_line(editor, &editor->lines[at]);
editor->num_lines++;
editor->dirty = 1;
}
void free_line(line_t *line)
{
free(line->render);
free(line->chars);
free(line->highlight);
}
void editor_delete_line(struct editor_state *editor, int at)
{
if (at < 0 || at >= editor->num_lines)
return;
free_line(&editor->lines[at]);
memmove(&editor->lines[at], &editor->lines[at + 1], sizeof(line_t) * (editor->num_lines - at - 1));
for (int j = at; j < editor->num_lines; j++)
editor->lines[j].index--;
editor->num_lines--;
editor->dirty = 1;
}
void line_insert_char(struct editor_state *editor, line_t *line, int at, int c)
{
if (at < 0 || at > line->size)
at = line->size;
line->chars = realloc(line->chars, line->size + 2);
memmove(&line->chars[at + 1], &line->chars[at], line->size - at + 1);
line->size++;
line->chars[at] = c;
editor_update_line(editor, line);
editor->dirty = 1;
}
void line_append_string(struct editor_state *editor, line_t *line, char* string, size_t length)
{
line->chars = realloc(line->chars, line->size + length + 1);
memcpy(&line->chars[line->size], string, length);
line->size += length;
line->chars[line->size] = '\0';
editor_update_line(editor, line);
editor->dirty = 1;
}
void line_delete_char(struct editor_state *editor, line_t *line, int at)
{
if (at < 0 || at >= line->size)
return;
memmove(&line->chars[at], &line->chars[at + 1], line->size - at);
line->size--;
editor_update_line(editor, line);
editor->dirty = 1;
}
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