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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_tab_switch(Ted *ted, Node *node, i64 tab) {
assert(node->tabs);
if (tab < arr_len(node->tabs)) {
node_switch_to_tab(ted, node, (u16)tab);
}
}
static void node_free(Node *node) {
arr_free(node->tabs);
memset(node, 0, sizeof *node);
}
static void node_close(Ted *ted, Node *node) {
// @TODO(split)
// delete all associated buffers
arr_foreach_ptr(node->tabs, u16, tab) {
u16 buffer_index = *tab;
ted_delete_buffer(ted, buffer_index);
}
node_free(node);
u16 node_index = (u16)(node - ted->nodes);
assert(node_index < TED_MAX_NODES);
ted->nodes_used[node_index] = false;
if (ted->active_node == node) {
ted->active_node = NULL;
}
}
// close tab, WITHOUT checking for unsaved changes!
// returns true if the node is still open
static bool node_tab_close(Ted *ted, Node *node, u16 index) {
u16 ntabs = (u16)arr_len(node->tabs);
assert(index < ntabs);
if (ntabs == 1) {
// only 1 tab left, just close the node
node_close(ted, node);
return false;
} else {
u16 buffer_index = node->tabs[index];
// remove tab from array
memmove(&node->tabs[index], &node->tabs[index + 1], (size_t)(ntabs - (index + 1)) * sizeof *node->tabs);
arr_remove_last(node->tabs);
ted_delete_buffer(ted, buffer_index);
ntabs = (u16)arr_len(node->tabs); // update ntabs
assert(ntabs);
// fix active_tab
if (index < node->active_tab)
--node->active_tab;
node->active_tab = clamp_u16(node->active_tab, 0, ntabs - 1);
if (ted->active_node == node) {
// fix active buffer if necessary
ted->active_buffer = &ted->buffers[node->tabs[node->active_tab]];
}
return true;
}
}
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;
float const border_thickness = settings->border_thickness;
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;
if (!ted->menu) {
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)) {
// click on tab to switch to it
u16 tab_index = (u16)((click.x - r.pos.x) / tab_width);
ted->active_node = node;
node_switch_to_tab(ted, node, tab_index);
}
}
for (u16 c = 0; c < ted->nmouse_clicks[SDL_BUTTON_MIDDLE]; ++c) {
// middle-click to close tab
v2 click = ted->mouse_clicks[SDL_BUTTON_MIDDLE][c];
if (rect_contains_point(tab_bar_rect, click)) {
u16 tab_index = (u16)((click.x - r.pos.x) / tab_width);
u16 buffer_idx = node->tabs[tab_index];
TextBuffer *buffer = &ted->buffers[buffer_idx];
// close that tab
if (buffer_unsaved_changes(buffer)) {
// make sure unsaved changes dialog is opened
ted_switch_to_buffer(ted, buffer_idx);
command_execute(ted, CMD_TAB_CLOSE, 1);
} else {
if (!node_tab_close(ted, node, tab_index)) {
return; // node closed
}
}
ntabs = (u16)arr_len(node->tabs);
tab_width = r.size.x / ntabs;
}
}
}
TextRenderState text_state = text_render_state_default;
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));
// tab border
gl_geometry_rect_border(tab_rect, border_thickness, colors[COLOR_BORDER]);
// tab title
{
if (buffer_unsaved_changes(buffer))
strbuf_printf(tab_title, "*%s*", filename);
else if (buffer->view_only)
strbuf_printf(tab_title, "VIEW %s", filename);
else
strbuf_printf(tab_title, "%s", filename);
}
text_state.max_x = rect_x2(tab_rect);
rgba_u32_to_floats(colors[COLOR_TEXT], text_state.color);
text_state.x = tab_rect.pos.x;
text_state.y = tab_rect.pos.y;
text_utf8_with_state(font, &text_state, tab_title);
if (i == node->active_tab) {
// highlight active tab
gl_geometry_rect(tab_rect, colors[is_active ? COLOR_ACTIVE_TAB_HL : COLOR_SELECTED_TAB_HL]);
// set window title to active tab's title
strbuf_printf(ted->window_title, "ted %s", tab_title);
}
}
gl_geometry_draw();
text_render(font);
}
u16 buffer_index = node->tabs[node->active_tab];
TextBuffer *buffer = &ted->buffers[buffer_index];
assert(ted->buffers_used[buffer_index]);
Rect buffer_rect = rect_translate(r, V2(0, tab_bar_height));
buffer_rect.size.y -= tab_bar_height;
buffer_render(buffer, buffer_rect);
} else {
// 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->split_vertical) {
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_frame(ted, a, r1);
node_frame(ted, b, r2);
}
}
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