From 1a416a917d74d956469e6e80cf4bb519e9474c91 Mon Sep 17 00:00:00 2001
From: cflip <cflip@cflip.net>
Date: Tue, 17 Jan 2023 10:39:21 -0700
Subject: Rename 'rows' to 'lines' everywhere

For whatever reason lines were called rows in the code, so this refactor
changes that name everywhere. The name 'row' is still used in some
places to refer to the unit of height in the screen.
---
 line.c | 150 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 line.c

(limited to 'line.c')

diff --git a/line.c b/line.c
new file mode 100644
index 0000000..27b8915
--- /dev/null
+++ b/line.c
@@ -0,0 +1,150 @@
+#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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