From 838664f2b50ebdbe54ef874d859c2909a58d3b74 Mon Sep 17 00:00:00 2001
From: Patrick Cleaveliln <patrick@spacegirl.nl>
Date: Thu, 10 Jul 2025 00:52:17 +0000
Subject: [PATCH] finally saving files, such wow

---
 src/core/file_buffer.odin | 30 ++++++++++++++++++++++++++++--
 src/input/input.odin      |  7 +++++++
 src/main.odin             |  2 +-
 src/panels/panels.odin    | 16 ++++++++++++++++
 todo.md                   |  2 +-
 5 files changed, 53 insertions(+), 4 deletions(-)

diff --git a/src/core/file_buffer.odin b/src/core/file_buffer.odin
index e6d3a49..0d16138 100644
--- a/src/core/file_buffer.odin
+++ b/src/core/file_buffer.odin
@@ -401,6 +401,8 @@ update_file_buffer_index_from_cursor :: proc(buffer: ^FileBuffer) {
 
 file_buffer_line_length :: proc(buffer: ^FileBuffer, index: FileBufferIndex) -> int {
     line_length := 0;
+    if len(buffer.content_slices) <= 0 do return line_length
+
     first_character := buffer.content_slices[index.slice_index][index.content_index];
 
     left_it := new_file_buffer_iter_with_cursor(buffer, Cursor { index = index });
@@ -717,7 +719,9 @@ new_file_buffer :: proc(allocator: mem.Allocator, file_path: string, base_dir: s
         buffer := FileBuffer {
             allocator = allocator,
             directory = dir,
-            file_path = fi.fullpath[4:],
+            file_path = fi.fullpath,
+            // TODO: fix this windows issue
+            // file_path = fi.fullpath[4:],
             extension = extension,
 
             original_content = slice.clone_to_dynamic(original_content),
@@ -731,7 +735,12 @@ new_file_buffer :: proc(allocator: mem.Allocator, file_path: string, base_dir: s
             input_buffer = make([dynamic]u8, 0, 1024),
         };
 
-        append(&buffer.content_slices, buffer.original_content[:]);
+        if len(buffer.original_content) > 0 {
+            append(&buffer.content_slices, buffer.original_content[:]);
+        } else {
+            append(&buffer.added_content, '\n')
+            append(&buffer.content_slices, buffer.added_content[:])
+        }
 
         return buffer, error();
     } else {
@@ -739,6 +748,23 @@ new_file_buffer :: proc(allocator: mem.Allocator, file_path: string, base_dir: s
     }
 }
 
+save_buffer_to_disk :: proc(state: ^State, buffer: ^FileBuffer) -> (error: os.Error) {
+    fd := os.open(buffer.file_path, flags = os.O_RDWR) or_return;
+    defer os.close(fd);
+
+    offset: i64 = 0
+    for content_slice in buffer.content_slices {
+        os.write_at(fd, content_slice, offset) or_return
+        
+        offset += i64(len(content_slice))
+    }
+    os.flush(fd)
+
+    log.infof("written %v bytes", offset)
+    
+    return
+}
+
 next_buffer :: proc(state: ^State, prev_buffer: ^int) -> int {
     index := prev_buffer^;
 
diff --git a/src/input/input.odin b/src/input/input.odin
index 7686c80..cee2b1c 100644
--- a/src/input/input.odin
+++ b/src/input/input.odin
@@ -73,6 +73,13 @@ register_default_input_actions :: proc(input_map: ^core.InputActions) {
         }, "decrease font size");
     }
 
+    // Save file
+    core.register_ctrl_key_action(input_map, .S, proc(state: ^State) {
+        if err := core.save_buffer_to_disk(state, core.current_buffer(state)); err != nil {
+            log.errorf("failed to save buffer to disk: %v", err)
+        }
+    }, "Save file")
+
     core.register_key_action(input_map, .G, core.new_input_actions(), "Go commands");
     register_default_go_actions(&(&input_map.key_actions[.G]).action.(core.InputActions));
 
diff --git a/src/main.odin b/src/main.odin
index 24c24b9..a162476 100644
--- a/src/main.odin
+++ b/src/main.odin
@@ -336,7 +336,7 @@ main :: proc() {
     defer ttf.Quit();
 
     sdl_window := sdl2.CreateWindow(
-        "odin_editor - [now with more ui]",
+        "odin_editor - [less plugins more speed]",
         sdl2.WINDOWPOS_UNDEFINED,
         sdl2.WINDOWPOS_UNDEFINED,
         640,
diff --git a/src/panels/panels.odin b/src/panels/panels.odin
index ed63a3f..31ec700 100644
--- a/src/panels/panels.odin
+++ b/src/panels/panels.odin
@@ -142,6 +142,22 @@ render_file_buffer :: proc(state: ^core.State, s: ^ui.State, buffer: ^core.FileB
         {
             ui.open_element(s, fmt.tprintf("%s", state.mode), {})
             ui.close_element(s)
+
+            ui.open_element(s, nil, { kind = {ui.Grow{}, ui.Grow{}}})
+            ui.close_element(s)
+
+            ui.open_element(
+                s,
+                fmt.tprintf(
+                    "%v:%v - Slice %v:%v",
+                    buffer.cursor.line + 1,
+                    buffer.cursor.col + 1,
+                    buffer.cursor.index.slice_index,
+                    buffer.cursor.index.content_index
+                ),
+                {}
+            )
+            ui.close_element(s)
         }
         ui.close_element(s)
     }
diff --git a/todo.md b/todo.md
index 251f319..9126d26 100644
--- a/todo.md
+++ b/todo.md
@@ -5,7 +5,7 @@
 
 # Planned Features
 - Save/Load files
-    - [ ] Save
+    - [x] Save
     - [ ] Load when changed on disk
 - [ ] Simple File Search (vim /)
 - [ ] Auto-indent