allow looking up terms from within terms

resolves #167, resolves #139, resolves #75, resolves #151

ext/fg/float.html

@@ -36,6 +36,8 @@
 
         <script src="/fg/js/api.js"></script>
         <script src="/fg/js/util.js"></script>
+        <script src="/fg/js/document.js"></script>
+        <script src="/fg/js/source.js"></script>
         <script src="/mixed/js/display.js"></script>
 
         <script src="/fg/js/float.js"></script>

ext/fg/js/float.js

@@ -123,6 +123,41 @@ class DisplayFloat extends Display {
             parent.appendChild(this.styleNode);
         }
     }
+
+    async onTermLookup(e) {
+        try {
+            e.preventDefault();
+
+            const clickedElement = $(e.target);
+            const textSource = docRangeFromPoint({x: e.clientX, y: e.clientY});
+            textSource.setEndOffset(this.options.scanning.length);
+
+            const {definitions, length} = await apiTermsFind(textSource.text());
+            if (definitions.length === 0) {
+                return false;
+            }
+
+            textSource.setEndOffset(length);
+
+            const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt);
+
+            const context = {
+                source: {
+                    definitions: this.definitions,
+                    index: Display.entryIndexFind(clickedElement)
+                }
+            };
+
+            if (this.context) {
+                context.sentence = sentence;
+                context.url = this.context.url;
+            }
+
+            this.termsShow(definitions, this.options, context);
+        } catch (e) {
+            this.onError(e);
+        }
+    }
 }
 
 window.yomichan_display = new DisplayFloat();

ext/mixed/js/display.js

@@ -265,6 +265,7 @@ class Display {
             $('.action-view-note').click(this.onNoteView.bind(this));
             $('.action-play-audio').click(this.onAudioPlay.bind(this));
             $('.kanji-link').click(this.onKanjiLookup.bind(this));
+            $('.glossary li').click(this.onTermLookup.bind(this));
 
             await this.adderButtonUpdate(['term-kanji', 'term-kana'], sequence);
         } catch (e) {