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This commit is contained in:
Syed Daanish
2025-12-13 16:47:07 +00:00
parent d8c281d7d7
commit a59111162c
5 changed files with 85 additions and 43 deletions
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29
src/editor_scroll.cc
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@@ -4,9 +4,13 @@ extern "C" {
}
#include "../include/editor.h"
#include "../include/utils.h"
#include <cmath>
void scroll_up(Editor *editor, uint32_t number) {
number++;
uint32_t numlen =
2 + static_cast<int>(std::log10(editor->root->line_count + 1));
uint32_t render_width = editor->size.col - numlen;
Coord *scroll_queue = (Coord *)malloc(sizeof(Coord) * number);
uint32_t q_head = 0;
uint32_t q_size = 0;
@@ -44,7 +48,7 @@ void scroll_up(Editor *editor, uint32_t number) {
uint32_t inc =
grapheme_next_character_break_utf8(line + offset, line_len - offset);
int width = display_width(line + offset, inc);
if (col + width > editor->size.col) {
if (col + width > render_width) {
if (q_size < number) {
scroll_queue[(q_head + q_size) % number] = {i, offset};
q_size++;
@@ -74,6 +78,9 @@ void scroll_up(Editor *editor, uint32_t number) {
void scroll_down(Editor *editor, uint32_t number) {
if (!editor || number == 0)
return;
uint32_t numlen =
2 + static_cast<int>(std::log10(editor->root->line_count + 1));
uint32_t render_width = editor->size.col - numlen;
uint32_t line_index = editor->scroll.row;
LineIterator *it = begin_l_iter(editor->root, line_index);
if (!it)
@@ -145,12 +152,12 @@ void scroll_down(Editor *editor, uint32_t number) {
uint32_t col = 0;
uint32_t local_render_offset = 0;
uint32_t left = line_len - current_byte_offset;
while (left > 0 && col < editor->size.col) {
while (left > 0 && col < render_width) {
uint32_t cluster_len = grapheme_next_character_break_utf8(
line + current_byte_offset + local_render_offset, left);
int width = display_width(
line + current_byte_offset + local_render_offset, cluster_len);
if (col + width > editor->size.col)
if (col + width > render_width)
break;
local_render_offset += cluster_len;
left -= cluster_len;
@@ -183,6 +190,9 @@ void ensure_cursor(Editor *editor) {
editor->cursor = editor->scroll;
return;
}
uint32_t numlen =
2 + static_cast<int>(std::log10(editor->root->line_count + 1));
uint32_t render_width = editor->size.col - numlen;
uint32_t visual_rows = 0;
uint32_t line_index = editor->scroll.row;
bool first_visual_line = true;
@@ -229,11 +239,11 @@ void ensure_cursor(Editor *editor) {
uint32_t col = 0;
uint32_t advance = 0;
uint32_t left = line_len - offset;
while (left > 0 && col < editor->size.col) {
while (left > 0 && col < render_width) {
uint32_t g =
grapheme_next_character_break_utf8(line + offset + advance, left);
int w = display_width(line + offset + advance, g);
if (col + w > editor->size.col)
if (col + w > render_width)
break;
advance += g;
left -= g;
@@ -262,6 +272,9 @@ void ensure_cursor(Editor *editor) {
void ensure_scroll(Editor *editor) {
std::shared_lock knot_lock(editor->knot_mtx);
uint32_t numlen =
2 + static_cast<int>(std::log10(editor->root->line_count + 1));
uint32_t render_width = editor->size.col - numlen;
if (editor->cursor.row < editor->scroll.row ||
(editor->cursor.row == editor->scroll.row &&
editor->cursor.col < editor->scroll.col)) {
@@ -284,7 +297,7 @@ void ensure_scroll(Editor *editor) {
uint32_t inc =
grapheme_next_character_break_utf8(line + offset, len - offset);
int width = display_width(line + offset, inc);
if (cols + width > editor->size.col) {
if (cols + width > render_width) {
rows++;
cols = 0;
if (editor->cursor.col > old_offset && editor->cursor.col <= offset) {
@@ -363,12 +376,12 @@ void ensure_scroll(Editor *editor) {
uint32_t col = 0;
uint32_t local_render_offset = 0;
uint32_t line_left = line_len - current_byte_offset;
while (line_left > 0 && col < editor->size.col) {
while (line_left > 0 && col < render_width) {
uint32_t cluster_len = grapheme_next_character_break_utf8(
line + current_byte_offset + local_render_offset, line_left);
int width = display_width(
line + current_byte_offset + local_render_offset, cluster_len);
if (col + width > editor->size.col)
if (col + width > render_width)
break;
local_render_offset += cluster_len;
line_left -= cluster_len;