ctrl+pageup/down to switch between tabs

1 files changed, 104 insertions, 0 deletions

diff --git a/node.c b/node.c
new file mode 100644
index 0000000..6681a84
--- /dev/null
+++ b/node.c
@@ -0,0 +1,104 @@
+static void node_switch_to_tab(Ted *ted, Node *node, u16 new_tab_index) {
+	node->active_tab = new_tab_index;
+	if (node == ted->active_node) {
+		// switch active buffer
+		assert(node->tabs);
+		u16 buffer_idx = node->tabs[new_tab_index];
+		ted->active_buffer = &ted->buffers[buffer_idx];
+	}
+}
+
+// move n tabs to the right
+static void node_tab_next(Ted *ted, Node *node, i64 n) {
+	assert(node->tabs);
+	u16 ntabs = (u16)arr_len(node->tabs);
+	u16 tab_idx = (u16)mod_i64(node->active_tab + n, ntabs);
+	node_switch_to_tab(ted, node, tab_idx);
+}
+
+static void node_tab_prev(Ted *ted, Node *node, i64 n) {
+	node_tab_next(ted, node, -n);
+}
+
+static void node_frame(Ted *ted, Node *node, Rect r) {
+	if (node->tabs) {
+		bool is_active = node == ted->active_node;
+		Settings const *settings = &ted->settings;
+		u32 const *colors = settings->colors;
+		Font *font = ted->font;
+		
+		u16 buffer_index = node->tabs[node->active_tab];
+		float tab_bar_height = 20;
+		
+		Rect tab_bar_rect = r;
+		tab_bar_rect.size.y = tab_bar_height;
+
+		{ // tab bar
+			u16 ntabs = (u16)arr_len(node->tabs);
+			float tab_width = r.size.x / ntabs;
+			for (u16 c = 0; c < ted->nmouse_clicks[SDL_BUTTON_LEFT]; ++c) {
+				v2 click = ted->mouse_clicks[SDL_BUTTON_LEFT][c];
+				if (rect_contains_point(tab_bar_rect, click)) {
+					u16 tab_index = (u16)((click.x - r.pos.x) / tab_width);
+					node_switch_to_tab(ted, node, tab_index);
+				}
+			}
+			for (u16 i = 0; i < ntabs; ++i) {
+				TextBuffer *buffer = &ted->buffers[node->tabs[i]];
+				char tab_title[256];
+				char const *path = buffer_get_filename(buffer);
+				char const *filename = path_filename(path);
+				Rect tab_rect = rect(V2(r.pos.x + tab_width * i, r.pos.y), V2(tab_width, tab_bar_height));
+				glBegin(GL_QUADS);
+				gl_color_rgba(colors[COLOR_BORDER]);
+
+				// tab border
+				rect_render_border(tab_rect, 1);
+				if (i == node->active_tab) {
+					// highlight active tab
+					gl_color_rgba(colors[is_active ? COLOR_ACTIVE_TAB_HL : COLOR_HL]);
+					rect_render(tab_rect);
+				}
+				glEnd();
+
+				// tab title
+				{
+					char const *surround = buffer_unsaved_changes(buffer) ? "*" : "";
+					strbuf_printf(tab_title, "%s%s%s", surround, filename, surround);
+				}
+				gl_color_rgba(colors[COLOR_TEXT]);
+				TextRenderState text_state = text_render_state_default;
+				text_state.max_x = rect_x2(tab_rect);
+				text_render_with_state(font, &text_state, tab_title, tab_rect.pos.x, tab_rect.pos.y);
+				
+			}
+		}
+
+		TextBuffer *buffer = &ted->buffers[buffer_index];
+		Rect buffer_rect = rect_translate(r, V2(0, tab_bar_height));
+		buffer_render(buffer, buffer_rect);
+	} else {
+
+#if 0
+	// @TODO: test this
+		// this node is a split
+		Node *a = &ted->nodes[node->split_a];
+		Node *b = &ted->nodes[node->split_b];
+		Rect r1 = r, r2 = r;
+		if (node->vertical_split) {
+			float split_pos = r.size.y * node->split_pos;
+			r1.size.y = split_pos;
+			r2.pos.y += split_pos;
+			r2.size.y = r.size.y - split_pos;
+		} else {
+			float split_pos = r.size.x * node->split_pos;
+			r1.size.x = split_pos;
+			r2.pos.x += split_pos;
+			r2.size.x = r.size.x - split_pos;
+		}
+		node_render(ted, a, r1);
+		node_render(ted, b, r2);
+#endif
+	}
+}
+