From ffe1ca643ea31415effff83f47ad92df1356561c Mon Sep 17 00:00:00 2001
From: Krzosa Karol <krzosa.karol@gmail.com>
Date: Fri, 28 Jun 2024 10:20:17 +0200
Subject: [PATCH] Fixing bugs, bring back mouse selection

---
 src/text_editor/main.cpp | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/src/text_editor/main.cpp b/src/text_editor/main.cpp
index e6047da..ec94074 100644
--- a/src/text_editor/main.cpp
+++ b/src/text_editor/main.cpp
@@ -468,13 +468,14 @@ int   main() {
             for (int64_t line = line_min_y; line < line_max_y && line >= 0 && line < window.layout.rows.len; line += 1) {
                 LayoutRow &row = window.layout.rows[line];
                 For(row.columns) {
-                    if (CheckCollisionRecs(ToRectangle(it.rect), ToRectangle(window.rect))) {
+                    if (CheckCollisionRecs(ToRectangle(it.rect - window.scroll), ToRectangle(window.rect))) {
                         visible_columns.add(it);
                     }
                 }
             }
 
             // Update the scroll based on first cursor
+            // @todo: needs a rewrite
             if (!AreEqual(window.main_cursor_begin_frame, window.cursors[0])) {
                 Vec2  rect_size                     = GetSize(window.rect);
                 float visible_cells_in_render_units = font_size * (float)visible_lines;
@@ -485,9 +486,9 @@ int   main() {
                 Line    line   = FindLine(window.buffer, front);
 
                 // Scroll Y
-                if (line.number < line_min_y) {
+                if (line.number < (line_min_y + 1)) {
                     window.scroll.y = line.number * font_size;
-                } else if (line.number >= line_max_y) {
+                } else if (line.number >= (line_max_y - 1)) {
                     int64_t diff    = line.number - line_max_y;
                     window.scroll.y = (line_min_y + diff) * font_size + cut_off_in_render_units;
                 }
@@ -514,6 +515,7 @@ int   main() {
 
             // Mouse selection @todo
             {
+                SetMouseCursor(MOUSE_CURSOR_DEFAULT);
                 Vec2 mouse        = GetMousePosition();
                 Vec2 mouse_lookup = Vector2Add(mouse, window.scroll);
 
@@ -522,7 +524,16 @@ int   main() {
                     Rect2     col_rect      = rowcol.b->rect - window.scroll;
                     Rectangle col_rectangle = ToRectangle(col_rect);
                     if (CheckCollisionPointRec(mouse, col_rectangle)) {
-                        DrawRectangleRec(col_rectangle, {0, 0, 255, 40});
+                        // DrawRectangleRec(col_rectangle, {0, 0, 255, 40});
+                        SetMouseCursor(MOUSE_CURSOR_IBEAM);
+
+                        if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
+                            window.cursors.clear();
+                            window.cursors.add({rowcol.b->pos, rowcol.b->pos});
+                        } else if (IsMouseButtonDown(MOUSE_BUTTON_LEFT)) {
+                            Cursor *cursor = window.cursors.last();
+                            cursor[0]      = ChangeBack(*cursor, rowcol.b->pos);
+                        }
                     }
                 }
             }
@@ -553,14 +564,15 @@ int   main() {
                 }
             }
 
-            // Draw cursor stuff @todo: draw selection
+            // Draw cursor stuff
             ForItem(cursor, window.cursors) {
                 auto front = GetRowCol(window, GetFront(cursor));
                 auto back  = GetRowCol(window, GetBack(cursor));
 
                 For(visible_columns) {
                     if (it.pos >= cursor.range.min && it.pos < cursor.range.max) {
-                        DrawRectangleRec(ToRectangle(it.rect), {0, 50, 150, 50});
+                        Rect2 rect = it.rect - window.scroll;
+                        DrawRectangleRec(ToRectangle(rect), {0, 50, 150, 50});
                     }
                 }