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tui: title bar gracefully degrades on narrow terminals (UX-6)

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When the terminal is too narrow to hold

    username · 在线 N · MODE  [静音]                ? 帮助

the chips and hint would visually collide.  Now the renderer measures
required width against render_width and drops optional segments in
reverse priority until what's left fits:

    1. drop the "? 帮助" hint
    2. drop the "静音" marker (if shown)
    3. drop the mode chip
    4. drop the online-count chip

The bold username is always shown.  A minimum 1-column gap is kept
between left and right halves so they never touch.

Mostly cosmetic on a regular terminal, but matters on phones /
tmux split panes / narrow side windows.
This commit is contained in:
m1ngsama 2026-05-17 13:51:25 +08:00
parent ae1bc2f166
commit 0a013ed40f
1 changed files with 42 additions and 10 deletions
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52
src/tui.c
View file

@ -320,15 +320,16 @@ void tui_render_screen(client_t *client) {
/* Title bar — segmented chips on a single line, no full-line reverse.
*
* Segments (left to right):
* Segments (left to right), each followed by a dim middle-dot:
* • bold username
* • online count
* • mode name (colour matches the mode itself: cyan/yellow/magenta)
* • mute marker, only when active
* • right-aligned hint
*
* `· ` separators are dim grey so the eye groups segments without
* mistaking them for content. */
* When the terminal is narrow, drop the optional segments in
* reverse priority: hint → mute → mode chip → online count, until
* what's left fits. The bold username is always shown. */
struct title_chip { const char *value; const char *value_color; };
struct title_chip chips[3];
int chip_count = 0;
@ -355,11 +356,39 @@ void tui_render_screen(client_t *client) {
chips[chip_count].value_color = mode_color;
chip_count++;
const char *hint = "? 帮助";
int hint_width = utf8_string_width(hint);
int mute_width = client->mute_joins ? 6 : 0; /* " 静音" = 2 + 4 */
/* Decide what fits. Reserve at least 1 col of gap between left and
* right halves so they never visually touch. */
int show_hint = 1;
int show_mute = client->mute_joins ? 1 : 0;
int show_chips = chip_count;
while (show_chips > 1) {
int left_w = 1 /*leading space*/;
for (int i = 0; i < show_chips; i++) {
if (i > 0) left_w += 3; /* " · " */
left_w += utf8_string_width(chips[i].value);
}
if (show_mute) left_w += mute_width;
int right_w = (show_hint ? hint_width + 1 /*trailing space*/ : 0);
int needed = left_w + 1 /*min gap*/ + right_w;
if (needed <= render_width) break;
/* Drop in priority order: hint → mute → mode chip → online count. */
if (show_hint) { show_hint = 0; continue; }
if (show_mute) { show_mute = 0; continue; }
if (show_chips > 1) { show_chips--; continue; }
break;
}
/* Compose left half. */
char left[256];
size_t lpos = 0;
int left_width = 0;
for (int i = 0; i < chip_count; i++) {
for (int i = 0; i < show_chips; i++) {
if (i > 0) {
buffer_appendf(left, sizeof(left), &lpos, "\033[2;37m · \033[0m");
left_width += 3;
@ -368,21 +397,24 @@ void tui_render_screen(client_t *client) {
chips[i].value_color, chips[i].value);
left_width += utf8_string_width(chips[i].value);
}
if (client->mute_joins) {
if (show_mute) {
buffer_appendf(left, sizeof(left), &lpos, " \033[2;37m静音\033[0m");
left_width += 4;
left_width += mute_width;
}
const char *hint = "? 帮助";
int hint_width = utf8_string_width(hint);
int gap = render_width - left_width - hint_width - 2;
int gap = render_width - left_width - (show_hint ? hint_width + 2 : 1);
if (gap < 1) gap = 1;
buffer_appendf(buffer, buf_size, &pos, " %s", left);
for (int i = 0; i < gap; i++) {
buffer_append_bytes(buffer, buf_size, &pos, " ", 1);
}
buffer_appendf(buffer, buf_size, &pos, "\033[2;37m%s\033[0m \033[K\r\n", hint);
if (show_hint) {
buffer_appendf(buffer, buf_size, &pos,
"\033[2;37m%s\033[0m \033[K\r\n", hint);
} else {
buffer_appendf(buffer, buf_size, &pos, "\033[K\r\n");
}
/* Render messages from snapshot. Insert a dim "── YYYY-MM-DD ──" divider
* before the first message of each new day so the eye can land on dates