Display history refactor (#691)

* Create DisplayHistory

* Change arguments for _setContentTermsOrKanji

* Set up history-driven content updates

* Use new history only

* Load definitions if missing

* Refactor definitions getting

* Add support for wildcards

* Move definitions setup

* Add events

* Allow state change even if there is no history state

* Update search page to use history

* Fix history overwriting

* Fix search page not seeing state chang events during prepare

* Update state if necessary

* Don't reassign query text if the same

* Remove DisplayContext

* Initialize with real history state

* Track URL

* Update DisplayHistory to support pseudo-history

* Configure history settings on search page

* Fix state

* Use full URL

* Change data format of setContent

* Rename details to content

* Update event arguments

* Fix animation

* Remove old state changes

* Clear content properly

* Remove set/clear content overrides

* Fix setting up event listeners for content clear

* Make clearContent private

* Make focus opt-in

* Validate source

* Add unloaded type

* Generalize content params

* Update how extension unload content is assigned

* Restore query blurring

3 files changed, 12 insertions, 5 deletions

diff --git a/ext/fg/float.html b/ext/fg/float.html
index 9e0e9ff4..f5a85f8e 100644
--- a/ext/fg/float.html
+++ b/ext/fg/float.html
@@ -50,9 +50,9 @@
         <script src="/fg/js/dom-text-scanner.js"></script>
         <script src="/fg/js/source.js"></script>
         <script src="/mixed/js/audio-system.js"></script>
-        <script src="/mixed/js/display-context.js"></script>
         <script src="/mixed/js/display.js"></script>
         <script src="/mixed/js/display-generator.js"></script>
+        <script src="/mixed/js/display-history.js"></script>
         <script src="/mixed/js/dynamic-loader.js"></script>
         <script src="/mixed/js/frame-endpoint.js"></script>
         <script src="/mixed/js/media-loader.js"></script>
diff --git a/ext/fg/js/float.js b/ext/fg/js/float.js
index f23a9b93..513ee178 100644
--- a/ext/fg/js/float.js
+++ b/ext/fg/js/float.js
@@ -50,6 +50,8 @@ class DisplayFloat extends Display {
         ]);
         window.addEventListener('message', this._onWindowMessage.bind(this), false);
 
+        this.initializeState();
+
         this._frameEndpoint.signal();
     }
 
diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index 73cea841..09928cd4 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -429,12 +429,17 @@ class Frontend {
             {
                 focus,
                 history: false,
-                type,
-                source: textSource.text(),
-                definitions,
-                context: {
+                params: {
+                    type,
+                    query: textSource.text(),
+                    wildcards: 'off'
+                },
+                state: {
                     sentence,
                     url
+                },
+                content: {
+                    definitions
                 }
             }
         );