improve history

assets/translation.json

@@ -151,7 +151,8 @@
     "Sort": "排序",
     "Name": "名称",
     "Date": "日期",
-    "Date Desc": "日期降序"
+    "Date Desc": "日期降序",
+    "Start": "开始"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -305,6 +306,7 @@
     "Sort": "排序",
     "Name": "名稱",
     "Date": "日期",
-    "Date Desc": "日期降序"
+    "Date Desc": "日期降序",
+    "Start": "開始"
   }
 }

lib/pages/comic_page.dart

@@ -42,12 +42,41 @@ class _ComicPageState extends LoadingState<ComicPage, ComicDetails>
 
   bool isDownloaded = false;
 
+  void updateHistory() async {
+    var newHistory = await HistoryManager()
+        .find(widget.id, ComicType(widget.sourceKey.hashCode));
+    if(newHistory?.ep != history?.ep || newHistory?.page != history?.page) {
+      history = newHistory;
+      update();
+    }
+  }
+
+  @override
+  Widget buildLoading() {
+    return Column(
+      children: [
+        const Appbar(title: Text("")),
+        Expanded(
+          child: super.buildLoading(),
+        ),
+      ],
+    );
+  }
+
   @override
   void initState() {
     scrollController.addListener(onScroll);
+    HistoryManager().addListener(updateHistory);
     super.initState();
   }
 
+  @override
+  void dispose() {
+    scrollController.removeListener(onScroll);
+    HistoryManager().removeListener(updateHistory);
+    super.dispose();
+  }
+
   @override
   void update() {
     setState(() {});
@@ -205,6 +234,7 @@ class _ComicPageState extends LoadingState<ComicPage, ComicDetails>
 
   Widget buildActions() {
     bool isMobile = context.width < changePoint;
+    bool hasHistory = history != null && (history!.ep > 1 || history!.page > 1);
     return SliverToBoxAdapter(
       child: Column(
         children: [
@@ -212,17 +242,17 @@ class _ComicPageState extends LoadingState<ComicPage, ComicDetails>
             scrollDirection: Axis.horizontal,
             padding: const EdgeInsets.symmetric(horizontal: 8),
             children: [
-              if (history != null && (history!.ep > 1 || history!.page > 1))
+              if (hasHistory && !isMobile)
                 _ActionButton(
                   icon: const Icon(Icons.menu_book),
                   text: 'Continue'.tl,
                   onPressed: continueRead,
                   iconColor: context.useTextColor(Colors.yellow),
                 ),
-              if (!isMobile)
+              if(!isMobile || hasHistory)
                 _ActionButton(
                   icon: const Icon(Icons.play_circle_outline),
-                  text: 'Read'.tl,
+                  text: 'Start'.tl,
                   onPressed: read,
                   iconColor: context.useTextColor(Colors.orange),
                 ),
@@ -278,7 +308,10 @@ class _ComicPageState extends LoadingState<ComicPage, ComicDetails>
                 ),
                 const SizedBox(width: 16),
                 Expanded(
-                  child: FilledButton(onPressed: read, child: Text("Read".tl)),
+                  child: hasHistory
+                      ? FilledButton(
+                          onPressed: continueRead, child: Text("Continue".tl))
+                      : FilledButton(onPressed: read, child: Text("Read".tl)),
                 )
               ],
             ).paddingHorizontal(16).paddingVertical(8),
@@ -770,6 +803,7 @@ class _ActionButton extends StatelessWidget {
     this.isLoading,
     this.iconColor,
   });
+
   final Widget icon;
 
   final Widget? activeIcon;
@@ -783,6 +817,7 @@ class _ActionButton extends StatelessWidget {
   final bool? isLoading;
 
   final Color? iconColor;
+
   @override
   Widget build(BuildContext context) {
     return Container(