added a window api of sorts, got started on grep style tool

src/core/core.odin

@@ -8,6 +8,36 @@ Mode :: enum {
     Insert,
 }
 
+WindowDrawProc :: proc(win: ^Window, state: ^State);
+WindowFreeProc :: proc(win: ^Window, state: ^State);
+WindowGetBufferProc :: proc(win: ^Window) -> ^FileBuffer;
+Window :: struct {
+    input_map: InputMap,
+    draw: WindowDrawProc,
+    free: WindowFreeProc,
+
+    get_buffer: WindowGetBufferProc,
+
+    // TODO: create hook for when mode changes happen
+}
+request_window_close :: proc(state: ^State) {
+    state.should_close_window = true;
+}
+
+close_window_and_free :: proc(state: ^State) {
+    if state.window != nil {
+        if state.window.free != nil {
+            state.window->free(state);
+        }
+
+        delete_input_map(&state.window.input_map);
+        free(state.window);
+
+        state.window = nil;
+        state.current_input_map = &state.input_map;
+    }
+}
+
 State :: struct {
     mode: Mode,
     should_close: bool,
@@ -22,10 +52,8 @@ State :: struct {
     current_buffer: int,
     buffers: [dynamic]FileBuffer,
 
-    // TODO: replace this with generic pointer to floating window
+    window: ^Window,
-    buffer_list_window_is_visible: bool,
+    should_close_window: bool,
-    buffer_list_window_selected_buffer: int,
-    buffer_list_window_input_map: InputMap, 
 
     input_map: InputMap,
     current_input_map: ^InputMap,
@@ -50,6 +78,10 @@ new_input_map :: proc() -> InputMap {
 
     return input_map;
 }
+delete_input_map :: proc(input_map: ^InputMap) {
+    delete(input_map.key_actions);
+    delete(input_map.ctrl_key_actions);
+}
 
 // NOTE(pcleavelin): might be a bug in the compiler where it can't coerce
 // `EditorAction` to `InputGroup` when given as a proc parameter, that is why there

src/core/file_buffer.odin

@@ -86,8 +86,11 @@ iterate_file_buffer :: proc(it: ^FileBufferIter) -> (character: u8, idx: FileBuf
     } else if it.cursor.index.slice_index < len(it.buffer.content_slices)-1 {
         it.cursor.index.content_index = 0;
         it.cursor.index.slice_index += 1;
-    } else {
+    } else if it.hit_end {
         return character, it.cursor.index, false;
+    } else {
+        it.hit_end = true;
+        return character, it.cursor.index, true;
     }
 
     if character == '\n' {
@@ -531,6 +534,31 @@ move_cursor_backward_end_of_word :: proc(buffer: ^FileBuffer) {
     update_file_buffer_scroll(buffer);
 }
 
+new_virtual_file_buffer :: proc(allocator: mem.Allocator) -> FileBuffer {
+    context.allocator = allocator;
+    width := 256;
+    height := 256;
+
+    buffer := FileBuffer {
+        allocator = allocator,
+        file_path = "virtual_buffer",
+
+        original_content = slice.clone_to_dynamic([]u8{'\n'}),
+        added_content = make([dynamic]u8, 0, 1024*1024),
+        content_slices = make([dynamic][]u8, 0, 1024*1024),
+
+        glyph_buffer_width = width,
+        glyph_buffer_height = height,
+        glyph_buffer = make([dynamic]Glyph, width*height, width*height),
+
+        input_buffer = make([dynamic]u8, 0, 1024),
+    };
+
+    append(&buffer.content_slices, buffer.original_content[:]);
+
+    return buffer;
+}
+
 new_file_buffer :: proc(allocator: mem.Allocator, file_path: string) -> (FileBuffer, Error) {
     context.allocator = allocator;
 
@@ -567,6 +595,14 @@ new_file_buffer :: proc(allocator: mem.Allocator, file_path: string) -> (FileBuf
     }
 }
 
+free_file_buffer :: proc(buffer: ^FileBuffer) {
+    delete(buffer.original_content);
+    delete(buffer.added_content);
+    delete(buffer.content_slices);
+    delete(buffer.glyph_buffer);
+    delete(buffer.input_buffer);
+}
+
 is_keyword :: proc(start: FileBufferIter, end: FileBufferIter) -> (matches: bool) {
     keywords := []string {
         "using",

src/main.odin

@@ -19,8 +19,8 @@ FileBuffer :: core.FileBuffer;
 // TODO: use buffer list in state
 do_normal_mode :: proc(state: ^State, buffer: ^FileBuffer) {
     if state.current_input_map != nil {
-        if raylib.IsKeyDown(.ESCAPE) {
+        if raylib.IsKeyPressed(.ESCAPE) {
-            state.current_input_map = &state.input_map;
+            core.request_window_close(state);
         } else if raylib.IsKeyDown(.LEFT_CONTROL) {
             for key, action in &state.current_input_map.ctrl_key_actions {
                 if raylib.IsKeyPressed(key) {
@@ -87,9 +87,14 @@ switch_to_buffer :: proc(state: ^State, item: ^ui.MenuBarItem) {
 
 register_default_leader_actions :: proc(input_map: ^core.InputMap) {
     core.register_key_action(input_map, .B, proc(state: ^State) {
-        state.buffer_list_window_is_visible = true;
+        state.window = ui.create_buffer_list_window();
-        state.current_input_map = &state.buffer_list_window_input_map;
+        state.current_input_map = &state.window.input_map;
     }, "show list of open buffers");
+    core.register_key_action(input_map, .R, proc(state: ^State) {
+        state.window = ui.create_grep_window();
+        state.current_input_map = &state.window.input_map;
+        state.mode = .Insert;
+    }, "live grep");
     core.register_key_action(input_map, .Q, proc(state: ^State) {
         state.current_input_map = &state.input_map;
     }, "close this help");
@@ -107,6 +112,8 @@ register_default_go_actions :: proc(input_map: ^core.InputMap) {
 }
 
 register_default_input_actions :: proc(input_map: ^core.InputMap) {
+    // Cursor Movement
+    {
         core.register_key_action(input_map, .W, proc(state: ^State) {
             core.move_cursor_forward_start_of_word(&state.buffers[state.current_buffer]);
         }, "move forward one word");
@@ -137,8 +144,10 @@ register_default_input_actions :: proc(input_map: ^core.InputMap) {
         core.register_ctrl_key_action(input_map, .D, proc(state: ^State) {
             core.scroll_file_buffer(&state.buffers[state.current_buffer], .Down);
         }, "scroll buffer up");
+    }
 
     // Scale font size
+    {
         core.register_ctrl_key_action(input_map, .MINUS, proc(state: ^State) {
             if state.source_font_height > 16 {
                 state.source_font_height -= 2;
@@ -155,7 +164,10 @@ register_default_input_actions :: proc(input_map: ^core.InputMap) {
             state.font = raylib.LoadFontEx("/System/Library/Fonts/Supplemental/Andale Mono.ttf", i32(state.source_font_height*2), nil, 0);
             raylib.SetTextureFilter(state.font.texture, .BILINEAR);
         }, "decrease font size");
+    }
 
+    // Inserting Text
+    {
         core.register_key_action(input_map, .I, proc(state: ^State) {
             state.mode = .Insert;
         }, "enter insert mode");
@@ -163,6 +175,7 @@ register_default_input_actions :: proc(input_map: ^core.InputMap) {
             core.move_cursor_right(&state.buffers[state.current_buffer], false);
             state.mode = .Insert;
         }, "enter insert mode after character (append)");
+    }
 
     core.register_key_action(input_map, .SPACE, core.new_input_map(), "leader commands");
     register_default_leader_actions(&(&input_map.key_actions[.SPACE]).action.(core.InputMap));
@@ -171,44 +184,15 @@ register_default_input_actions :: proc(input_map: ^core.InputMap) {
     register_default_go_actions(&(&input_map.key_actions[.G]).action.(core.InputMap));
 }
 
-register_buffer_list_input_actions :: proc(input_map: ^core.InputMap) {
-    core.register_key_action(input_map, .K, proc(state: ^State) {
-        if state.buffer_list_window_selected_buffer > 0 {
-            state.buffer_list_window_selected_buffer -= 1;
-        } else {
-            state.buffer_list_window_selected_buffer = len(state.buffers)-1;
-        }
-    }, "move selection up");
-    core.register_key_action(input_map, .J, proc(state: ^State) {
-        if state.buffer_list_window_selected_buffer >= len(state.buffers)-1 {
-            state.buffer_list_window_selected_buffer = 0;
-        } else {
-            state.buffer_list_window_selected_buffer += 1;
-        }
-    }, "move selection down");
-    core.register_key_action(input_map, .ENTER, proc(state: ^State) {
-        state.current_buffer = state.buffer_list_window_selected_buffer;
-
-        state.buffer_list_window_is_visible = false;
-        state.current_input_map = &state.input_map;
-    }, "switch to file");
-
-    core.register_key_action(input_map, .Q, proc(state: ^State) {
-        state.buffer_list_window_is_visible = false;
-        state.current_input_map = &state.input_map;
-    }, "close window");
-}
-
 main :: proc() {
     state := State {
         source_font_width = 8,
         source_font_height = 16,
         input_map = core.new_input_map(),
-        buffer_list_window_input_map = core.new_input_map(),
+        window = nil,
     };
     state.current_input_map = &state.input_map;
     register_default_input_actions(&state.input_map);
-    register_buffer_list_input_actions(&state.buffer_list_window_input_map);
 
     for arg in os.args[1:] {
         buffer, err := core.new_file_buffer(context.allocator, arg);
@@ -323,8 +307,8 @@ main :: proc() {
                 0,
                 theme.get_palette_raylib_color(.Background1));
 
-            if state.buffer_list_window_is_visible {
+            if state.window != nil && state.window.draw != nil {
-                ui.draw_buffer_list_window(&state);
+                state.window->draw(&state);
             }
 
             if state.current_input_map != &state.input_map {
@@ -377,10 +361,23 @@ main :: proc() {
 
         switch state.mode {
             case .Normal:
+                if state.window != nil && state.window.get_buffer != nil {
+                    do_normal_mode(&state, state.window->get_buffer());
+                } else {
                     do_normal_mode(&state, buffer);
+                }
             case .Insert:
+                if state.window != nil && state.window.get_buffer != nil {
+                    do_insert_mode(&state, state.window->get_buffer());
+                } else {
                     do_insert_mode(&state, buffer);
                 }
+        }
+
+        if state.should_close_window {
+            state.should_close_window = false;
+            core.close_window_and_free(&state);
+        }
 
         ui.test_menu_bar(&state, &menu_bar_state, 0,0, mouse_pos, raylib.IsMouseButtonReleased(.LEFT), state.source_font_height);
     }

src/ui/buffer_list_window.odin

@@ -6,7 +6,60 @@ import "vendor:raylib"
 import "../core"
 import "../theme"
 
-draw_buffer_list_window :: proc(state: ^core.State) {
+BufferListWindow :: struct {
+    using window: core.Window,
+
+    selected_buffer: int,
+}
+
+create_buffer_list_window :: proc() -> ^BufferListWindow {
+    input_map := core.new_input_map();
+
+    core.register_key_action(&input_map, .K, proc(state: ^core.State) {
+        win := cast(^BufferListWindow)(state.window);
+
+        if win.selected_buffer > 0 {
+            win.selected_buffer -= 1;
+        } else {
+            win.selected_buffer = len(state.buffers)-1;
+        }
+
+    }, "move selection up");
+    core.register_key_action(&input_map, .J, proc(state: ^core.State) {
+        win := cast(^BufferListWindow)(state.window);
+
+        if win.selected_buffer >= len(state.buffers)-1 {
+            win.selected_buffer = 0;
+        } else {
+            win.selected_buffer += 1;
+        }
+    }, "move selection down");
+    core.register_key_action(&input_map, .ENTER, proc(state: ^core.State) {
+        win := cast(^BufferListWindow)(state.window);
+
+        state.current_buffer = win.selected_buffer;
+
+        core.request_window_close(state);
+    }, "switch to file");
+
+    core.register_key_action(&input_map, .Q, proc(state: ^core.State) {
+        core.request_window_close(state);
+    }, "close window");
+
+    list_window := new(BufferListWindow);
+    list_window^ = BufferListWindow {
+        window = core.Window {
+            input_map = input_map,
+            draw = draw_buffer_list_window,
+        },
+    };
+
+    return list_window;
+}
+
+draw_buffer_list_window :: proc(win: ^core.Window, state: ^core.State) {
+    win := cast(^BufferListWindow)(win);
+
     win_rec := raylib.Rectangle {
         x = f32(state.screen_width/8),
         y = f32(state.screen_height/8),
@@ -37,7 +90,7 @@ draw_buffer_list_window :: proc(state: ^core.State) {
         text := raylib.TextFormat("%s:%d", buffer.file_path, buffer.cursor.line+1);
         text_width := raylib.MeasureTextEx(state.font, text, f32(state.source_font_height), 0);
 
-        if index == state.buffer_list_window_selected_buffer {
+        if index == win.selected_buffer {
             buffer.glyph_buffer_height = glyph_buffer_height;
             buffer.glyph_buffer_width = glyph_buffer_width;
             core.draw_file_buffer(

src/ui/grep_window.odin

@@ -0,0 +1,97 @@
+package ui;
+
+import "core:math"
+import "vendor:raylib"
+
+import "../core"
+import "../theme"
+
+GrepWindow :: struct {
+    using window: core.Window,
+
+    input_buffer: core.FileBuffer,
+}
+
+create_grep_window :: proc() -> ^GrepWindow {
+    input_map := core.new_input_map();
+
+    core.register_key_action(&input_map, .ENTER, proc(state: ^core.State) {
+        win := cast(^GrepWindow)(state.window);
+
+        core.request_window_close(state);
+    }, "jump to location");
+
+    core.register_key_action(&input_map, .I, proc(state: ^core.State) {
+        state.mode = .Insert;
+    }, "enter insert mode");
+
+    grep_window := new(GrepWindow);
+    grep_window^ = GrepWindow {
+        window = core.Window {
+            input_map = input_map,
+            draw = draw_grep_window,
+            get_buffer = grep_window_get_buffer,
+            free = free_grep_window,
+        },
+
+        input_buffer = core.new_virtual_file_buffer(context.allocator),
+    };
+
+    return grep_window;
+}
+
+free_grep_window :: proc(win: ^core.Window, state: ^core.State) {
+    win := cast(^GrepWindow)(win);
+
+    core.free_file_buffer(&win.input_buffer);
+}
+
+grep_window_get_buffer :: proc(win: ^core.Window) -> ^core.FileBuffer {
+    win := cast(^GrepWindow)(win);
+
+    return &win.input_buffer;
+}
+
+@private
+grep_files :: proc(win: ^core.Window, state: ^core.State) {
+    // TODO: use rip-grep to search through files
+}
+
+draw_grep_window :: proc(win: ^core.Window, state: ^core.State) {
+    win := cast(^GrepWindow)(win);
+
+    win_rec := raylib.Rectangle {
+        x = f32(state.screen_width/8),
+        y = f32(state.screen_height/8),
+        width = f32(state.screen_width - state.screen_width/4),
+        height = f32(state.screen_height - state.screen_height/4),
+    };
+    raylib.DrawRectangleRec(
+        win_rec,
+        theme.get_palette_raylib_color(.Background4));
+
+    win_margin := raylib.Vector2 { f32(state.source_font_width), f32(state.source_font_height) };
+
+    buffer_prev_width := (win_rec.width - win_margin.x*2) / 2;
+    buffer_prev_height := win_rec.height - win_margin.y*2;
+
+    glyph_buffer_width := int(buffer_prev_width) / state.source_font_width - 1;
+    glyph_buffer_height := 1;
+
+    raylib.DrawRectangle(
+        i32(win_rec.x + win_margin.x),
+        i32(win_rec.y + win_rec.height - win_margin.y * 2),
+        i32(buffer_prev_width),
+        i32(state.source_font_height),
+        theme.get_palette_raylib_color(.Background2));
+
+    win.input_buffer.glyph_buffer_height = glyph_buffer_height;
+    win.input_buffer.glyph_buffer_width = glyph_buffer_width;
+    core.draw_file_buffer(
+        state,
+        &win.input_buffer,
+        int(win_rec.x + win_margin.x),
+        int(win_rec.y + win_rec.height - win_margin.y * 2),
+        state.font,
+        show_line_numbers = false);
+}