Improvements to search UX

Pressing "S" while not focused on an input/textarea will now open the search.
Pressing "F" while not focused on an input/textarea will focus the member filter input.
Pressing Escape while focused on the search/filter will clear the input and close/unfocus it
Search result links are now treated as block elements so you can click anywhere inside the rectangle rather than specifically on the result text.

Author: dylemma

scaladoc-js/resources/scaladoc-searchbar.css

@@ -88,6 +88,14 @@
 
 .scaladoc-searchbar-result a {
     color: #1f2326;
+    /* for some reason, with display:block if there's a wrap between the
+     * search result text and the location span, the dead space to the
+     * left of the location span doesn't get treated as part of the block,
+     * which defeats the purpose of making the <a> a block element.
+     * But inline-block with width:100% works as desired.
+     */
+    display: inline-block;
+    width: 100%;
 }
 
 .scaladoc-searchbar-result .scaladoc-searchbar-location {

scaladoc-js/src/searchbar/SearchbarComponent.scala

@@ -21,7 +21,7 @@ class SearchbarComponent(val callback: (String) => List[PageEntry]):
       location.textContent = p.description
 
       wrapper.appendChild(resultA)
-      wrapper.appendChild(location)
+      resultA.appendChild(location)
       wrapper.addEventListener("mouseover", {
         case e: MouseEvent => handleHover(wrapper)
       })
@@ -59,6 +59,8 @@ class SearchbarComponent(val callback: (String) => List[PageEntry]):
         document.body.appendChild(rootDiv)
         input.focus()
       }
+    // open the search if the user hits the `s` key when not focused on a text input
+    document.body.addEventListener("keydown", (e: KeyboardEvent) => handleGlobalKeyDown(e))
 
     val element = createNestingDiv("search-content")(
       createNestingDiv("search-container")(
@@ -70,7 +72,6 @@ class SearchbarComponent(val callback: (String) => List[PageEntry]):
     document.getElementById("scaladoc-searchBar").appendChild(element)
     element
 
-
   private val input: html.Input =
     val element = document.createElement("input").asInstanceOf[html.Input]
     element.id = "scaladoc-searchbar-input"
@@ -106,6 +107,7 @@ class SearchbarComponent(val callback: (String) => List[PageEntry]):
         if e.keyCode == 40 then handleArrowDown()
         else if e.keyCode == 38 then handleArrowUp()
         else if e.keyCode == 13 then handleEnter()
+        else if e.keyCode == 27 then handleEscape()
     })
     element.id = "scaladoc-searchbar"
     element.appendChild(input)
@@ -146,6 +148,12 @@ class SearchbarComponent(val callback: (String) => List[PageEntry]):
       selectedElement.click()
     }
   }
+  private def handleEscape() = {
+    // clear the search input and close the search
+    input.value = ""
+    handleNewQuery("")
+    document.body.removeChild(rootDiv)
+  }
 
   private def handleHover(elem: html.Element) = {
     val selectedElement = resultsDiv.querySelector("[selected]")
@@ -155,4 +163,18 @@ class SearchbarComponent(val callback: (String) => List[PageEntry]):
     elem.setAttribute("selected","")
   }
 
+  private def handleGlobalKeyDown(e: KeyboardEvent) = {
+    // if the user presses the "S" key while not focused on an input, open the search
+    if (e.key == "s") {
+      val tag = e.target.asInstanceOf[html.Element].tagName
+      if (tag != "INPUT" && tag != "TEXTAREA") {
+        if (!document.body.contains(rootDiv)) {
+          document.body.appendChild(rootDiv)
+          // if we focus during the event handler, the `s` gets typed into the input
+          window.setTimeout(() => input.focus(), 1.0)
+        }
+      }
+    }
+  }
+
   handleNewQuery("")

scaladoc/resources/dotty_res/scripts/components/Input.js

@@ -4,15 +4,27 @@ class Input extends Component {
 
     this.inputRef = findRef(".filterableInput");
     this.onChangeFn = withEvent(this.inputRef, "input", this.onInputChange);
+    this.onKeydownFn = withEvent(this.inputRef, "keydown", this.onKeydown);
   }
 
   onInputChange = ({ currentTarget: { value } }) => {
     this.props.onInputChange(value);
   };
 
+  onKeydown = (e) => {
+    // if the user hits Escape while typing in the filter input,
+    // clear the filter and un-focus the input
+    if (e.keyCode == 27) {
+      this.inputRef.value = '';
+      this.onInputChange(e);
+      setTimeout(() => this.inputRef.blur(), 1);
+    }
+  }
+
   componentWillUnmount() {
     if (this.onChangeFn) {
       this.onChangeFn();
+      this.onKeydownFn();
     }
   }
 }

scaladoc/resources/dotty_res/scripts/ux.js

@@ -54,6 +54,20 @@ window.addEventListener("DOMContentLoaded", () => {
   hljs.registerLanguage("scala", highlightDotty);
   hljs.registerAliases(["dotty", "scala3"], "scala");
   hljs.initHighlighting();
+
+  /* listen for the `F` key to be pressed, to focus on the member filter input (if it's present) */
+  document.body.addEventListener('keydown', e => {
+    if (e.key == "f") {
+      const tag = e.target.tagName;
+      if (tag != "INPUT" && tag != "TEXTAREA") {
+        const filterInput = findRef('.documentableFilter input.filterableInput');
+        if (filterInput != null) {
+          // if we focus during this event handler, the `f` key gets typed into the input
+          setTimeout(() => filterInput.focus(), 1);
+        }
+      }
+    }
+  })
 });
 
 var zoom;