1 files changed, 130 insertions, 0 deletions
diff --git a/examples/dte/screen-window.c b/examples/dte/screen-window.c
new file mode 100644
index 0000000..aa3a96f
--- /dev/null
+++ b/examples/dte/screen-window.c
@@ -0,0 +1,130 @@
+#include "screen.h"
+
+static void print_separator(Window *window, void *ud)
+{
+    Terminal *term = ud;
+    TermOutputBuffer *obuf = &term->obuf;
+    if (window->x + window->w == term->width) {
+        return;
+    }
+    for (int y = 0, h = window->h; y < h; y++) {
+        term_move_cursor(obuf, window->x + window->w, window->y + y);
+        term_add_byte(obuf, '|');
+    }
+}
+
+static void update_separators(Terminal *term, const ColorScheme *colors, const Frame *frame)
+{
+    set_builtin_color(term, colors, BC_STATUSLINE);
+    frame_for_each_window(frame, print_separator, term);
+}
+
+static void update_line_numbers(Terminal *term, const ColorScheme *colors, Window *window, bool force)
+{
+    const View *view = window->view;
+    size_t lines = view->buffer->nl;
+    int x = window->x;
+
+    calculate_line_numbers(window);
+    long first = view->vy + 1;
+    long last = MIN(view->vy + window->edit_h, lines);
+
+    if (
+        !force
+        && window->line_numbers.first == first
+        && window->line_numbers.last == last
+    ) {
+        return;
+    }
+
+    window->line_numbers.first = first;
+    window->line_numbers.last = last;
+
+    TermOutputBuffer *obuf = &term->obuf;
+    char buf[DECIMAL_STR_MAX(unsigned long) + 1];
+    size_t width = window->line_numbers.width;
+    BUG_ON(width > sizeof(buf));
+    BUG_ON(width < LINE_NUMBERS_MIN_WIDTH);
+    term_output_reset(term, window->x, window->w, 0);
+    set_builtin_color(term, colors, BC_LINENUMBER);
+
+    for (int y = 0, h = window->edit_h, edit_y = window->edit_y; y < h; y++) {
+        unsigned long line = view->vy + y + 1;
+        memset(buf, ' ', width);
+        if (line <= lines) {
+            size_t i = width - 2;
+            do {
+                buf[i--] = (line % 10) + '0';
+            } while (line /= 10);
+        }
+        term_move_cursor(obuf, x, edit_y + y);
+        term_add_bytes(obuf, buf, width);
+    }
+}
+
+static void update_window_full(Window *window, void* UNUSED_ARG(data))
+{
+    EditorState *e = window->editor;
+    View *view = window->view;
+    view_update_cursor_x(view);
+    view_update_cursor_y(view);
+    view_update(view, e->options.scroll_margin);
+    if (e->options.tab_bar) {
+        print_tabbar(&e->terminal, &e->colors, window);
+    }
+    if (e->options.show_line_numbers) {
+        update_line_numbers(&e->terminal, &e->colors, window, true);
+    }
+    update_range(e, view, view->vy, view->vy + window->edit_h);
+    update_status_line(window);
+}
+
+void update_all_windows(EditorState *e)
+{
+    update_window_sizes(&e->terminal, e->root_frame);
+    frame_for_each_window(e->root_frame, update_window_full, NULL);
+    update_separators(&e->terminal, &e->colors, e->root_frame);
+}
+
+static void update_window(EditorState *e, Window *window)
+{
+    if (e->options.tab_bar && window->update_tabbar) {
+        print_tabbar(&e->terminal, &e->colors, window);
+    }
+
+    const View *view = window->view;
+    if (e->options.show_line_numbers) {
+        // Force updating lines numbers if all lines changed
+        bool force = (view->buffer->changed_line_max == LONG_MAX);
+        update_line_numbers(&e->terminal, &e->colors, window, force);
+    }
+
+    long y1 = MAX(view->buffer->changed_line_min, view->vy);
+    long y2 = MIN(view->buffer->changed_line_max, view->vy + window->edit_h - 1);
+    update_range(e, view, y1, y2 + 1);
+    update_status_line(window);
+}
+
+// Update all visible views containing this buffer
+void update_buffer_windows(EditorState *e, const Buffer *buffer)
+{
+    const View *current_view = e->view;
+    for (size_t i = 0, n = buffer->views.count; i < n; i++) {
+        View *view = buffer->views.ptrs[i];
+        if (view != view->window->view) {
+            // Not visible
+            continue;
+        }
+        if (view != current_view) {
+            // Restore cursor
+            view->cursor.blk = BLOCK(view->buffer->blocks.next);
+            block_iter_goto_offset(&view->cursor, view->saved_cursor_offset);
+
+            // These have already been updated for current view
+            view_update_cursor_x(view);
+            view_update_cursor_y(view);
+            view_update(view, e->options.scroll_margin);
+        }
+        update_window(e, view->window);
+    }
+}