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#include "row.h"
#include <stdlib.h>
#include <string.h>
#include "syntax.h"
int row_x_to_display_x(struct editor_row* row, int x)
{
int display_x = 0;
int j;
for (j = 0; j < x; j++) {
if (row->chars[j] == '\t')
display_x += (TAB_WIDTH - 1) - (display_x % TAB_WIDTH);
display_x++;
}
return display_x;
}
int row_display_x_to_x(struct editor_row* row, int display_x)
{
int current_display_x = 0;
int result_x;
for (result_x = 0; result_x < row->size; result_x++) {
if (row->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 update_row(struct editor_state* editor, struct editor_row* row)
{
int tabs = 0;
int j;
for (j = 0; j < row->size; j++)
if (row->chars[j] == '\t') tabs++;
free(row->render);
row->render = malloc(row->size + tabs * (TAB_WIDTH - 1) + 1);
int index = 0;
for (j = 0; j < row->size; j++) {
if (row->chars[j] == '\t') {
row->render[index++] = ' ';
while (index % TAB_WIDTH != 0) row->render[index++] = ' ';
} else {
row->render[index++] = row->chars[j];
}
}
row->render[index] = '\0';
row->render_size = index;
editor_update_syntax(editor, row);
}
void insert_row(struct editor_state* editor, int at, char* string, size_t length)
{
if (at < 0 || at > editor->row_count)
return;
editor->rows = realloc(editor->rows, sizeof(struct editor_row) * (editor->row_count + 1));
memmove(&editor->rows[at + 1], &editor->rows[at], sizeof(struct editor_row) * (editor->row_count - at));
for (int j = at + 1; j <= editor->row_count; j++)
editor->rows[at].index++;
editor->rows[at].index = at;
editor->rows[at].size = length;
editor->rows[at].chars = malloc(length + 1);
memcpy(editor->rows[at].chars, string, length);
editor->rows[at].chars[length] = '\0';
editor->rows[at].render_size = 0;
editor->rows[at].render = NULL;
editor->rows[at].highlight = NULL;
editor->rows[at].highlight_open_comment = 0;
update_row(editor, &editor->rows[at]);
editor->row_count++;
editor->dirty = 1;
}
void free_row(struct editor_row* row)
{
free(row->render);
free(row->chars);
free(row->highlight);
}
void delete_row(struct editor_state* editor, int at)
{
if (at < 0 || at >= editor->row_count)
return;
free_row(&editor->rows[at]);
memmove(&editor->rows[at], &editor->rows[at + 1], sizeof(struct editor_row) * (editor->row_count - at - 1));
for (int j = at; j < editor->row_count; j++)
editor->rows[j].index--;
editor->row_count--;
editor->dirty = 1;
}
void row_insert_char(struct editor_state* editor, struct editor_row* row, int at, int c)
{
if (at < 0 || at > row->size)
at = row->size;
row->chars = realloc(row->chars, row->size + 2);
memmove(&row->chars[at + 1], &row->chars[at], row->size - at + 1);
row->size++;
row->chars[at] = c;
update_row(editor, row);
editor->dirty = 1;
}
void row_append_string(struct editor_state* editor, struct editor_row* row, char* string, size_t length)
{
row->chars = realloc(row->chars, row->size + length + 1);
memcpy(&row->chars[row->size], string, length);
row->size += length;
row->chars[row->size] = '\0';
update_row(editor, row);
editor->dirty = 1;
}
void row_delete_char(struct editor_state* editor, struct editor_row* row, int at)
{
if (at < 0 || at >= row->size)
return;
memmove(&row->chars[at], &row->chars[at + 1], row->size - at);
row->size--;
update_row(editor, row);
editor->dirty = 1;
}
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