Forgot management.cpp

src/text_editor/management.cpp

@@ -0,0 +1,184 @@
+inline Window *GetWindow(WindowID id) {
+    For(Windows) if (it.id.id == id.id) return ⁢
+    return &Windows[0];
+}
+
+inline Buffer *GetBuffer(BufferID id) {
+    For(Buffers) if (it.id.id == id.id) return ⁢
+    return &Buffers[0];
+}
+
+inline Buffer *GetBuffer(String name) {
+    For(Buffers) if (it.name == name) return ⁢
+    return &Buffers[0];
+}
+
+inline View *GetView(ViewID id) {
+    For(Views) if (it.id.id == id.id) return ⁢
+    return &Views[0];
+}
+
+inline bool IsNull(Buffer *buffer) { return buffer->id.id == NullBufferID.id; }
+
+void           SetActiveWindow(WindowID window);
+inline bool    IsActive(Window *window) { return window->id.id == ActiveWindow.id; }
+inline bool    IsActive(Window *window, View *view) { return window->active_view.id == view->id.id; }
+inline Window *GetActiveWindow() { return GetWindow(ActiveWindow); }
+inline View   *GetActiveView(Window *window) {
+    if (window->active_view.id == 0) return GetView(window->views[0]);
+    else return GetView(window->active_view);
+}
+
+Window *CreateWindow() {
+    Window *w            = Alloc(&Windows);
+    w->visible           = true;
+    w->draw_scrollbar    = true;
+    w->draw_line_numbers = true;
+    w->id                = AllocWindowID();
+    return w;
+}
+
+void AddView(Window *w, ViewID view) {
+    if (w->active_view.id == 0) w->active_view = view;
+    For(w->views) if (it.id == view.id) return;
+    Add(&w->views, view);
+}
+
+View *CreateView(BufferID buffer_id) {
+    View *w      = Alloc(&Views);
+    w->id        = AllocViewID();
+    w->buffer_id = buffer_id;
+    Add(&w->carets, {0, 0});
+    return w;
+}
+
+void SetActiveWindow(WindowID window) {
+    if (LastFrameIDWhenSwitchedActiveWindow != FrameID) {
+        if (ActiveWindow.id != CommandWindowID.id) {
+            LastActiveWindow = ActiveWindow;
+        }
+        ActiveWindow                        = window;
+        LastFrameIDWhenSwitchedActiveWindow = FrameID;
+    }
+}
+
+Window *FindParentWindow(ViewID view_id) {
+    ForItem(window, Windows) {
+        if (window.active_view.id == view_id.id) {
+            return &window;
+        } else {
+            ForItem(child_view, window.views) {
+                if (child_view.id == view_id.id) {
+                    return &window;
+                }
+            }
+        }
+    }
+    return NULL;
+}
+
+View *FindViewWithBufferName(String name) {
+    For(Views) {
+        Buffer *buffer = GetBuffer(it.buffer_id);
+        if (buffer->name == name) {
+            return ⁢
+        }
+    }
+    return NULL;
+}
+
+Buffer *BufferOpenFile(String path) {
+    Scratch scratch;
+    String  abs_path = GetAbsolutePath(scratch, path);
+
+    Buffer *possible_buffer = GetBuffer(abs_path);
+    if (!IsNull(possible_buffer)) return possible_buffer;
+
+    Allocator sys_allocator = GetSystemAllocator();
+    if (!FileExists(path)) {
+        String dir = ChopLastSlash(abs_path);
+        if (!IsDir(dir)) {
+            return GetBuffer(NullBufferID);
+        } else {
+            path           = Copy(sys_allocator, abs_path);
+            Buffer *buffer = CreateBuffer(sys_allocator, path);
+            return buffer;
+        }
+    } else {
+        path           = Copy(sys_allocator, abs_path);
+        String  string = ReadFile(scratch, path);
+        Buffer *buffer = CreateBuffer(sys_allocator, path, string.len * 4);
+
+        for (Int i = 0; i < string.len;) {
+            if (string.data[i] == '\r') {
+                i += 1;
+                continue;
+            }
+            if (string.data[i] == '\t') {
+                // @WARNING: DONT INCREASE THE SIZE CARELESSLY, WE NEED TO ADJUST BUFFER SIZE
+                for (Int i = 0; i < 4; i += 1) buffer->data[buffer->len++] = L' ';
+                i += 1;
+                continue;
+            }
+
+            uint32_t    u32    = '?';
+            UTF32Result decode = UTF8ToUTF32(string.data + i, (int64_t)(string.len - i));
+            if (!decode.error) {
+                i += decode.advance;
+                u32 = decode.out_str;
+            } else {
+                i += 1;
+            }
+
+            UTF16Result encode = UTF32ToUTF16(decode.out_str);
+            if (!encode.error) {
+                for (int64_t encode_i = 0; encode_i < encode.len; encode_i += 1) {
+                    buffer->data[buffer->len++] = encode.out_str[encode_i];
+                    Assert(buffer->len < buffer->cap);
+                }
+            } else {
+                buffer->data[buffer->len++] = L'?';
+            }
+        }
+        UpdateLines(buffer, {}, String16{(wchar_t *)buffer->data, buffer->len});
+        return buffer;
+    }
+}
+
+View *ViewOpenFile(String name) {
+    // if there is no view for this file, create one
+    View *view = FindViewWithBufferName(name);
+    if (!view) {
+        Buffer *buffer = BufferOpenFile(name);
+        if (IsNull(buffer)) Assert(0); // @todo
+        view = CreateView(buffer->id);
+        return view;
+    }
+
+    // If there is a buffer and view for this file then figure out
+    // if we need another view or can we reuse
+    Window *window = FindParentWindow(view->id);
+    if (!window) {
+        Buffer *buffer = BufferOpenFile(name);
+        if (IsNull(buffer)) Assert(0); // @todo
+        view = CreateView(buffer->id);
+        return view;
+    }
+
+    // Create new view, 2 view into same buffer at the same time
+    if (window->active_view.id == view->id.id) {
+        Buffer *buffer = BufferOpenFile(name);
+        if (IsNull(buffer)) Assert(0); // @todo
+        view = CreateView(buffer->id);
+        return view;
+    }
+
+    // Unlink and reuse
+    For(window->views) {
+        if (it.id == view->id.id) {
+            UnorderedRemove(&window->views, it);
+            break;
+        }
+    }
+    return view;
+}