feat: Label maxlen property

label-NAME-maxlen = N
label-NAME-ellipsis = bool

Fixes jaagr/lemonbuddy#49

README.md

@@ -281,7 +281,7 @@ The configuration syntax is based on the `ini` file format.
   ;
   ; The rest of the drawtypes follow the same pattern.
   ;
-  ;   label-NAME[-(foreground|background|(under|over)line|font|padding)] = ?
+  ;   label-NAME[-(foreground|background|(under|over)line|font|padding|maxlen|ellipsis)] = ?
   ;   icon-NAME[-(foreground|background|(under|over)line|font|padding)] = ?
   ;   ramp-NAME-[0-9]+[-(foreground|background|(under|over)line|font|padding)] = ?
   ;   animation-NAME-[0-9]+[-(foreground|background|(under|over)line|font|padding)] = ?
@@ -300,6 +300,10 @@ The configuration syntax is based on the `ini` file format.
   format-offline = <label-offline>
   format-offline-offset = -8
 
+  ; Cap the song label without trailing ellipsis
+  label-song-maxlen = 30
+  label-song-ellipsis = false
+
   ; By only specifying alpha value, it will be applied to the bar's default foreground
   label-time-foreground = #66
 

include/drawtypes/label.hpp

@@ -9,11 +9,13 @@ namespace drawtypes
   {
     std::string text, fg, bg, ul, ol;
     int font = 0, padding = 0, margin = 0;
+    size_t maxlen = 0;
+    bool ellipsis = true;
 
     Label(std::string text, int font)
       : text(text), font(font){}
-    Label(std::string text, std::string fg = "", std::string bg = "", std::string ul = "", std::string ol = "", int font = 0, int padding = 0, int margin = 0)
+    Label(std::string text, std::string fg = "", std::string bg = "", std::string ul = "", std::string ol = "", int font = 0, int padding = 0, int margin = 0, size_t maxlen = 0, bool ellipsis = true)
-      : text(text), fg(fg), bg(bg), ul(ul), ol(ol), font(font), padding(padding), margin(margin){}
+      : text(text), fg(fg), bg(bg), ul(ul), ol(ol), font(font), padding(padding), margin(margin), maxlen(maxlen), ellipsis(ellipsis){}
 
     operator bool() {
       return !this->text.empty();

src/drawtypes/label.cpp

@@ -6,7 +6,7 @@ namespace drawtypes
 {
   std::unique_ptr<Label> Label::clone() {
     return std::unique_ptr<Label> { new Label(
-      this->text, this->fg, this->bg, this->ul, this->ol, this->font, this->padding, this->margin) };
+      this->text, this->fg, this->bg, this->ul, this->ol, this->font, this->padding, this->margin, this->maxlen, this->ellipsis) };
   }
 
   void Label::replace_token(std::string token, std::string replacement) {
@@ -37,7 +37,9 @@ namespace drawtypes
       config::get<std::string>(config_path, label_name +"-overline", ""),
       config::get<int>(config_path, label_name +"-font", 0),
       config::get<int>(config_path, label_name +"-padding", 0),
-      config::get<int>(config_path, label_name +"-margin", 0)) };
+      config::get<int>(config_path, label_name +"-margin", 0),
+      config::get<size_t>(config_path, label_name +"-maxlen", 0),
+      config::get<bool>(config_path, label_name +"-ellipsis", true)) };
   }
 
   std::unique_ptr<Label> get_optional_config_label(std::string config_path, std::string label_name, std::string def) {

src/services/builder.cpp

@@ -211,6 +211,15 @@ void Builder::node(drawtypes::Label *label, bool add_space)
 {
   if (!*label) return;
 
+  auto text = label->text;
+
+  if (label->maxlen > 0) {
+    text.resize(label->maxlen);
+
+    if (label->ellipsis && label->text.length() > label->maxlen)
+      text.append("...");
+  }
+
   if ((label->ol.empty() && this->o > 0) || (this->o > 0 && label->margin > 0))
     this->overline_close(true);
   if ((label->ul.empty() && this->u > 0) || (this->u > 0 && label->margin > 0))
@@ -228,7 +237,7 @@ void Builder::node(drawtypes::Label *label, bool add_space)
     this->color(label->fg);
       if (label->padding > 0)
         this->space(label->padding);
-      this->node(label->text, label->font, add_space);
+      this->node(text, label->font, add_space);
       if (label->padding > 0)
         this->space(label->padding);
     this->color_close(lazy_closing && label->margin > 0);