feat: add text glow animation for client titles

feat: enhance alt-tab selection with bold font rendering
refactor: simplify title bar color logic to use focused/unfocused states
perf: increase focus animation duration for smoother transitions
refactor: update build dependencies for decorations and workspace modules

build/decorations.d

@@ -1,7 +1,9 @@
 build/decorations.o: src/decorations.c include/decorations.h \
- include/dwn.h include/client.h include/config.h include/util.h
+ include/dwn.h include/client.h include/config.h include/util.h \
+ include/workspace.h
 include/decorations.h:
 include/dwn.h:
 include/client.h:
 include/config.h:
 include/util.h:
+include/workspace.h:

build/workspace.d

@@ -1,6 +1,6 @@
 build/workspace.o: src/workspace.c include/workspace.h include/dwn.h \
  include/client.h include/layout.h include/atoms.h include/util.h \
- include/config.h include/panel.h include/api.h
+ include/config.h include/panel.h include/api.h include/decorations.h
 include/workspace.h:
 include/dwn.h:
 include/client.h:
@@ -10,3 +10,4 @@ include/util.h:
 include/config.h:
 include/panel.h:
 include/api.h:
+include/decorations.h:

include/client.h

@@ -72,6 +72,7 @@ Client *client_get_last(void);
 
 void client_start_focus_animation(Client *client, bool gaining_focus);
 unsigned long client_get_animated_title_color(Client *client);
+unsigned long client_get_glow_text_color(Client *client);
 void client_update_animations(void);
 
 #endif

include/dwn.h

@@ -95,6 +95,13 @@ typedef struct {
     bool active;
 } ColorAnimation;
 
+typedef struct {
+    float phase;
+    float speed;
+    unsigned long base_color;
+    bool active;
+} TextGlowAnimation;
+
 typedef struct Client Client;
 typedef struct Workspace Workspace;
 typedef struct Monitor Monitor;
@@ -116,6 +123,7 @@ struct Client {
     SnapConstraint snap;
     unsigned long taskbar_color;
     ColorAnimation title_anim;
+    TextGlowAnimation text_glow;
     Client *next;
     Client *prev;
     Client *mru_next;

include/util.h

@@ -58,6 +58,7 @@ unsigned long generate_unique_color(void);
 unsigned long adjust_color_for_background(unsigned long color, unsigned long bg);
 unsigned long interpolate_color(unsigned long from, unsigned long to, float progress);
 unsigned long dim_color(unsigned long color, float factor);
+unsigned long glow_color(unsigned long base, float phase);
 
 long get_time_ms(void);
 void sleep_ms(int ms);

src/client.c

@@ -92,6 +92,11 @@ Client *client_create(Window window)
     client_update_class(client);
     client->taskbar_color = generate_unique_color();
 
+    client->text_glow.phase = (float)(rand() % 628) / 100.0f;
+    client->text_glow.speed = 0.8f + (float)(rand() % 40) / 100.0f;
+    client->text_glow.base_color = client->taskbar_color;
+    client->text_glow.active = true;
+
     return client;
 }
 
@@ -1289,7 +1294,7 @@ Client *client_get_last(void)
 }
 
 
-#define FOCUS_ANIMATION_DURATION_MS 200
+#define FOCUS_ANIMATION_DURATION_MS 400
 
 void client_start_focus_animation(Client *client, bool gaining_focus)
 {
@@ -1298,7 +1303,7 @@ void client_start_focus_animation(Client *client, bool gaining_focus)
     }
 
     unsigned long full_color = client->taskbar_color;
-    unsigned long dimmed_color = dim_color(client->taskbar_color, 0.6f);
+    unsigned long dimmed_color = dim_color(client->taskbar_color, 0.35f);
 
     if (gaining_focus) {
         client->title_anim.from_color = dimmed_color;
@@ -1322,17 +1327,16 @@ unsigned long client_get_animated_title_color(Client *client)
     Workspace *ws = workspace_get(client->workspace);
     bool is_focused = (ws != NULL && ws->focused == client);
 
-    if (client->title_anim.active) {
-        return interpolate_color(client->title_anim.from_color,
-                                 client->title_anim.to_color,
-                                 client->title_anim.progress);
-    }
+    const ColorScheme *colors = config_get_colors();
+    return is_focused ? colors->title_focused_bg : colors->title_unfocused_bg;
+}
 
-    if (is_focused) {
-        return client->taskbar_color;
+unsigned long client_get_glow_text_color(Client *client)
+{
+    if (client == NULL || !client->text_glow.active) {
+        return 0xFFFFFF;
     }
-
-    return dim_color(client->taskbar_color, 0.6f);
+    return glow_color(client->text_glow.base_color, client->text_glow.phase);
 }
 
 void client_update_animations(void)
@@ -1345,23 +1349,31 @@ void client_update_animations(void)
     bool needs_redraw = false;
 
     for (Client *c = dwn->client_list; c != NULL; c = c->next) {
-        if (!c->title_anim.active) {
-            continue;
+        if (c->title_anim.active) {
+            long elapsed = now - c->title_anim.start_time;
+            c->title_anim.progress = (float)elapsed / (float)FOCUS_ANIMATION_DURATION_MS;
+
+            if (c->title_anim.progress >= 1.0f) {
+                c->title_anim.progress = 1.0f;
+                c->title_anim.active = false;
+            }
+            needs_redraw = true;
         }
 
-        long elapsed = now - c->title_anim.start_time;
-        c->title_anim.progress = (float)elapsed / (float)FOCUS_ANIMATION_DURATION_MS;
-
-        if (c->title_anim.progress >= 1.0f) {
-            c->title_anim.progress = 1.0f;
-            c->title_anim.active = false;
+        if (c->text_glow.active && c->workspace == (unsigned int)dwn->current_workspace) {
+            c->text_glow.phase += 0.01f * c->text_glow.speed;
+            if (c->text_glow.phase > 6.283f) {
+                c->text_glow.phase -= 6.283f;
+            }
+            needs_redraw = true;
         }
 
         if (c->frame != None && c->workspace == (unsigned int)dwn->current_workspace) {
-            Workspace *ws = workspace_get(c->workspace);
-            bool focused = (ws != NULL && ws->focused == c);
-            decorations_render(c, focused);
-            needs_redraw = true;
+            if (!(c->flags & CLIENT_MINIMIZED)) {
+                Workspace *ws = workspace_get(c->workspace);
+                bool focused = (ws != NULL && ws->focused == c);
+                decorations_render(c, focused);
+            }
         }
     }
 

src/decorations.c

@@ -8,6 +8,7 @@
 #include "client.h"
 #include "config.h"
 #include "util.h"
+#include "workspace.h"
 
 #include <string.h>
 #include <stdbool.h>
@@ -57,20 +58,27 @@ void decorations_render_title_bar(Client *client, bool focused)
     }
 
     Display *dpy = dwn->display;
-    const ColorScheme *colors = config_get_colors();
     int title_height = config_get_title_height();
     int border = client->border_width;
+    const ColorScheme *colors = config_get_colors();
 
-    unsigned long bg_color = client_get_animated_title_color(client);
-    unsigned long fg_color = adjust_color_for_background(colors->title_focused_fg, bg_color);
+    Workspace *ws = workspace_get(client->workspace);
+    bool is_focused = (ws != NULL && ws->focused == client);
+    unsigned long bg_color = is_focused ? colors->title_focused_bg : colors->title_unfocused_bg;
+    unsigned long fg_color = client->taskbar_color;
+    fg_color = adjust_color_for_background(fg_color, bg_color);
 
     XSetForeground(dpy, dwn->gc, bg_color);
     XFillRectangle(dpy, client->frame, dwn->gc,
                    border, border,
                    client->width, title_height);
 
-    if (client->title[0] != '\0' && dwn->xft_font != NULL) {
-        int text_y = border + (title_height + dwn->xft_font->ascent) / 2;
+    bool is_alt_tab_selection = (dwn->is_alt_tabbing && dwn->alt_tab_client == client);
+    XftFont *title_font = (is_alt_tab_selection && dwn->xft_font_bold != NULL) ?
+                          dwn->xft_font_bold : dwn->xft_font;
+
+    if (client->title[0] != '\0' && title_font != NULL) {
+        int text_y = border + (title_height + title_font->ascent) / 2;
         int text_x = border + BUTTON_PADDING;
 
         int max_width = client->width - 3 * (BUTTON_SIZE + BUTTON_PADDING) - 2 * BUTTON_PADDING;
@@ -82,7 +90,7 @@ void decorations_render_title_bar(Client *client, bool focused)
         display_title[sizeof(display_title) - 4] = '\0';
 
         XGlyphInfo extents;
-        XftTextExtentsUtf8(dpy, dwn->xft_font,
+        XftTextExtentsUtf8(dpy, title_font,
                            (const FcChar8 *)display_title, strlen(display_title), &extents);
         int text_width = extents.xOff;
 
@@ -100,7 +108,7 @@ void decorations_render_title_bar(Client *client, bool focused)
             display_title[cut] = '\0';
             title_truncated = true;
 
-            XftTextExtentsUtf8(dpy, dwn->xft_font,
+            XftTextExtentsUtf8(dpy, title_font,
                                (const FcChar8 *)display_title, strlen(display_title), &extents);
             text_width = extents.xOff;
         }
@@ -122,7 +130,7 @@ void decorations_render_title_bar(Client *client, bool focused)
             XftColorAllocValue(dpy, DefaultVisual(dpy, dwn->screen),
                                dwn->colormap, &render_color, &xft_color);
 
-            XftDrawStringUtf8(xft_draw, &xft_color, dwn->xft_font,
+            XftDrawStringUtf8(xft_draw, &xft_color, title_font,
                               text_x, text_y,
                               (const FcChar8 *)display_title, strlen(display_title));
 
@@ -162,7 +170,10 @@ void decorations_render_buttons(Client *client, bool focused)
         return;
     }
 
-    unsigned long bg_color = client_get_animated_title_color(client);
+    const ColorScheme *colors = config_get_colors();
+    Workspace *ws = workspace_get(client->workspace);
+    bool is_focused = (ws != NULL && ws->focused == client);
+    unsigned long bg_color = is_focused ? colors->title_focused_bg : colors->title_unfocused_bg;
 
     XSetForeground(dpy, dwn->gc, bg_color);
     XFillRectangle(dpy, client->frame, dwn->gc, close_x, button_y, BUTTON_SIZE, BUTTON_SIZE);

src/panel.c

@@ -456,7 +456,7 @@ void panel_render_taskbar(Panel *panel, int x, int *width)
         if (minimized) {
             fg = colors->panel_fg;
         } else {
-            fg = c->taskbar_color;
+            fg = client_get_glow_text_color(c);
         }
 
         if (focused && !minimized) {

src/util.c

@@ -795,3 +795,26 @@ unsigned long dim_color(unsigned long color, float factor)
 
     return rgb_to_pixel(r, g, b);
 }
+
+unsigned long glow_color(unsigned long base, float phase)
+{
+    int r, g, b;
+    color_to_rgb(base, &r, &g, &b);
+
+    float mod_r = 0.25f * sinf(phase);
+    float mod_g = 0.25f * sinf(phase + 2.094f);
+    float mod_b = 0.25f * sinf(phase + 4.189f);
+
+    r = r + (int)(r * mod_r);
+    g = g + (int)(g * mod_g);
+    b = b + (int)(b * mod_b);
+
+    if (r > 255) r = 255;
+    if (r < 0) r = 0;
+    if (g > 255) g = 255;
+    if (g < 0) g = 0;
+    if (b > 255) b = 255;
+    if (b < 0) b = 0;
+
+    return rgb_to_pixel(r, g, b);
+}

src/workspace.c

@@ -12,6 +12,7 @@
 #include "config.h"
 #include "panel.h"
 #include "api.h"
+#include "decorations.h"
 
 #include <string.h>
 #include <stdio.h>
@@ -551,10 +552,11 @@ void workspace_alt_tab_next(void)
     if (!dwn->is_alt_tabbing) {
         dwn->is_alt_tabbing = true;
         dwn->alt_tab_client = ws->focused;
-        XGrabKeyboard(dwn->display, dwn->root, True, 
+        XGrabKeyboard(dwn->display, dwn->root, True,
                       GrabModeAsync, GrabModeAsync, CurrentTime);
     }
 
+    Client *previous_selection = dwn->alt_tab_client;
     Client *current = dwn->alt_tab_client;
     if (current == NULL) {
         current = ws->mru_head;
@@ -566,8 +568,15 @@ void workspace_alt_tab_next(void)
         dwn->alt_tab_client = ws->mru_head;
     }
 
+    if (previous_selection != NULL && previous_selection->frame != None) {
+        decorations_render(previous_selection, false);
+    }
+
     if (dwn->alt_tab_client != NULL) {
         client_focus(dwn->alt_tab_client, false);
+        if (dwn->alt_tab_client->frame != None) {
+            decorations_render(dwn->alt_tab_client, true);
+        }
     }
 }
 
@@ -581,21 +590,28 @@ void workspace_alt_tab_prev(void)
     if (!dwn->is_alt_tabbing) {
         dwn->is_alt_tabbing = true;
         dwn->alt_tab_client = ws->focused;
-        XGrabKeyboard(dwn->display, dwn->root, True, 
+        XGrabKeyboard(dwn->display, dwn->root, True,
                       GrabModeAsync, GrabModeAsync, CurrentTime);
     }
 
+    Client *previous_selection = dwn->alt_tab_client;
     Client *current = dwn->alt_tab_client;
 
-    
     if (current != NULL && current->mru_prev != NULL) {
         dwn->alt_tab_client = current->mru_prev;
     } else {
         dwn->alt_tab_client = ws->mru_tail;
     }
 
+    if (previous_selection != NULL && previous_selection->frame != None) {
+        decorations_render(previous_selection, false);
+    }
+
     if (dwn->alt_tab_client != NULL) {
         client_focus(dwn->alt_tab_client, false);
+        if (dwn->alt_tab_client->frame != None) {
+            decorations_render(dwn->alt_tab_client, true);
+        }
     }
 }