simplify rerouteHotkeys to avoid enabling it twice

edit/codemirror-factory.js

@@ -21,19 +21,7 @@
 
     create(place, options) {
       const cm = CodeMirror(place, options);
-      const {wrapper} = cm.display;
       cm.lastActive = 0;
-      cm.on('blur', () => {
-        rerouteHotkeys(true);
-        setTimeout(() => {
-          wrapper.classList.toggle('CodeMirror-active', wrapper.contains(document.activeElement));
-        });
-      });
-      cm.on('focus', () => {
-        rerouteHotkeys(false);
-        wrapper.classList.add('CodeMirror-active');
-        cm.lastActive = Date.now();
-      });
       cms.add(cm);
       return cm;
     },
@@ -52,6 +40,23 @@
     },
   };
 
+  const onCmFocus = cm => {
+    rerouteHotkeys.toggle(false);
+    cm.display.wrapper.classList.add('CodeMirror-active');
+    cm.lastActive = Date.now();
+  };
+  const onCmBlur = cm => {
+    rerouteHotkeys.toggle(true);
+    setTimeout(() => {
+      const {wrapper} = cm.display;
+      wrapper.classList.toggle('CodeMirror-active', wrapper.contains(document.activeElement));
+    });
+  };
+  CodeMirror.defineInitHook(cm => {
+    cm.on('focus', onCmFocus);
+    cm.on('blur', onCmBlur);
+  });
+
   const handledPrefs = {
     'editor.colorpicker'() {}, // handled in colorpicker-helper.js
     async 'editor.theme'(key, value) {

edit/linter-dialogs.js

@@ -1,7 +1,7 @@
 /* global $ $create $createLink messageBoxProxy */// dom.js
 /* global chromeSync */// storage-util.js
 /* global editor */
-/* global helpPopup rerouteHotkeys showCodeMirrorPopup */// util.js
+/* global helpPopup showCodeMirrorPopup */// util.js
 /* global linterMan */
 /* global t */// localization.js
 /* global tryJSONparse */// toolbox.js
@@ -62,7 +62,6 @@
     cm.focus();
     cm.on('changes', updateConfigButtons);
     updateConfigButtons();
-    rerouteHotkeys(false);
     window.on('closeHelp', onConfigClose, {once: true});
   };
 
@@ -160,7 +159,6 @@
   }
 
   function onConfigClose() {
-    rerouteHotkeys(true);
     cm = null;
   }
 

edit/sections-editor.js

@@ -23,6 +23,7 @@ function SectionsEditor() {
   let headerOffset; // in compact mode the header is at the top so it reduces the available height
 
   updateHeader();
+  rerouteHotkeys.toggle(true); // enabled initially because we don't always focus a CodeMirror
   editor.livePreview.init(null, style.id);
   container.classList.add('section-editor');
   $('#to-mozilla').on('click', showMozillaFormat);
@@ -53,7 +54,8 @@ function SectionsEditor() {
     },
 
     getSearchableInputs(cm) {
-      return sections.find(s => s.cm === cm).appliesTo.map(a => a.valueEl).filter(Boolean);
+      const sec = sections.find(s => s.cm === cm);
+      return sec ? sec.appliesTo.map(a => a.valueEl).filter(Boolean) : [];
     },
 
     jumpToEditor(i) {
@@ -488,7 +490,6 @@ function SectionsEditor() {
       scrollTo(0, si.scrollY);
       // only restore focus if it's the first CM to avoid derpy quirks
       focusOn = si.cms[0].focus && 0;
-      rerouteHotkeys(true);
     } else {
       si = null;
     }

edit/util.js

@@ -1,6 +1,5 @@
 /* global $ $create getEventKeyName messageBoxProxy moveFocus */// dom.js
 /* global CodeMirror */
-/* global debounce */// toolbox.js
 /* global editor */
 /* global prefs */
 /* global t */// localization.js
@@ -59,7 +58,7 @@ const helpPopup = {
 };
 
 // reroute handling to nearest editor when keypress resolves to one of these commands
-Object.assign(rerouteHotkeys, {
+const rerouteHotkeys = {
   commands: [
     'beautify',
     'colorpicker',
@@ -97,7 +96,7 @@ Object.assign(rerouteHotkeys, {
       event.stopPropagation();
     }
   },
-});
+};
 
 function clipString(str, limit = 100) {
   return str.length <= limit ? str : str.substr(0, limit) + '...';
@@ -149,14 +148,6 @@ function createHotkeyInput(prefId, onDone = () => {}) {
   });
 }
 
-function rerouteHotkeys(enable, immediately) {
-  if (immediately) {
-    rerouteHotkeys.toggle(enable);
-  } else {
-    debounce(rerouteHotkeys.toggle, 0, enable);
-  }
-}
-
 /* exported showCodeMirrorPopup */
 function showCodeMirrorPopup(title, html, options) {
   const popup = helpPopup.show(title, html);
@@ -174,7 +165,6 @@ function showCodeMirrorPopup(title, html, options) {
     keyMap: prefs.get('editor.keyMap'),
   }, options));
   cm.focus();
-  rerouteHotkeys(false);
 
   document.documentElement.style.pointerEvents = 'none';
   popup.style.pointerEvents = 'auto';
@@ -192,7 +182,6 @@ function showCodeMirrorPopup(title, html, options) {
   window.on('closeHelp', () => {
     window.off('keydown', onKeyDown, true);
     document.documentElement.style.removeProperty('pointer-events');
-    rerouteHotkeys(true);
     cm = popup.codebox = null;
   }, {once: true});