Fix tooltip truncation; add Stucklaunch assist

Tooltips: text_in() shifted the x position to fit the full string before
truncating, which drew the tooltip text outside its box. Truncate to the
available width first, then clamp inside the clip.

Stucklaunch (Movement):
- opt-in feature (Active off by default) with its own bind;
- holds jump, alternates +use every 2 ticks to regrab a physics prop,
  optionally +attack while the gravity gun is active, and air-strafes;
- engagement uses m_hGroundEntity (client netvar) latched for ~0.5 s so the
  prop stays active while airborne; falls back to running whenever active if
  the netvar is unavailable, with a startup warning to bind it;
- does not spawn or place props; the player supplies the prop and initial
  speed.

Config gets [stucklaunch] active/bind/use_spam/gravspam/autostrafe; Reset
restores those defaults. CONTEXT documents the assist and its limits.

1 files changed, 37 insertions, 10 deletions

diff --git a/src/gui.cpp b/src/gui.cpp
index 0d5b458..dc0e4eb 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -293,6 +293,19 @@ static void build_cards() {
   add_card(0, &g_abh, "ABH", "Accelerate on the jump tick by facing away "
                              "from the velocity.", true);
 
+  int sl = add_card(0, &g_stucklaunch, "Stucklaunch",
+                    "Hop on a physics prop while spamming grab to build "
+                    "speed in a small space.",
+                    true);
+  add_toggle(sl, "Use spam",
+             "Rapidly press +use to keep regrabbing the prop.",
+             &g_stucklaunch_use_spam);
+  add_toggle(sl, "Gravity gun spam",
+             "Rapidly press +attack while holding the gravity gun.",
+             &g_stucklaunch_gravspam);
+  add_toggle(sl, "Auto-strafe", "Air-strafe each hop.",
+             &g_stucklaunch_autostrafe);
+
   int jb = add_card(0, &g_jumpbug, "Jumpbug",
                     "Duck+jump when landing would hurt.", true);
   add_toggle(jb, "Assist timing",
@@ -523,26 +536,40 @@ static void text_in(const Rect &clip, int x, int y, const char *s,
     return;
   if (x >= clip.x + clip.w)
     return;
-  if (x + text_w(s, tall) > clip.x + clip.w)
-    x = clip.x + clip.w - text_w(s, tall);
-  if (max_w > 0 && text_w(s, tall) > max_w) {
-    char buf[256];
+
+  // Available space from x to the clip edge, optionally capped by max_w.
+  // Truncate first, then clamp: shifting before truncating used to draw the
+  // text outside the tooltip/button box.
+  int avail = clip.x + clip.w - x;
+  if (max_w > 0 && max_w < avail)
+    avail = max_w;
+  if (avail <= 0)
+    return;
+
+  char buf[256];
+  const char *draw = s;
+  int w = text_w(s, tall);
+  if (w > avail) {
     snprintf(buf, sizeof(buf), "%s", s);
     int n = (int)strlen(buf);
-    while (n > 3 && text_w(buf, tall) > max_w)
+    int dots = text_w("...", tall);
+    while (n > 0 && text_w(buf, tall) + dots > avail)
       buf[--n] = 0;
-    if (n > 3 && n < (int)sizeof(buf) - 3) {
+    if (n > 0 && n + 3 < (int)sizeof(buf)) {
       buf[n++] = '.';
       buf[n++] = '.';
       buf[n++] = '.';
       buf[n] = 0;
     }
-    s_text_color(c.r, c.g, c.b, c.a);
-    draw_text_raw(x, y, buf, font, tall);
-    return;
+    draw = buf;
+    w = text_w(draw, tall);
   }
+  if (x + w > clip.x + clip.w)
+    x = clip.x + clip.w - w;
+  if (x < clip.x)
+    x = clip.x;
   s_text_color(c.r, c.g, c.b, c.a);
-  draw_text_raw(x, y, s, font, tall);
+  draw_text_raw(x, y, draw, font, tall);
 }
 
 static Rect clip_rect(const Rect &r, const Rect &clip) {