From b76ee6f8e5d2c4e8d09fd1b1f3c2ececbec535b6 Mon Sep 17 00:00:00 2001
From: Arthur Milchior <Arthur@Milchior.fr>
Date: Mon, 30 Mar 2020 10:37:38 +0200
Subject: [PATCH] ListCardsPreviewer

---
 qt/aqt/previewer.py | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/qt/aqt/previewer.py b/qt/aqt/previewer.py
index 9168ba7e3..796605f20 100644
--- a/qt/aqt/previewer.py
+++ b/qt/aqt/previewer.py
@@ -2,7 +2,7 @@ import json
 import re
 import time
 from dataclasses import dataclass
-from typing import Any, Optional, Union
+from typing import Any, List, Optional, Union
 
 from anki.cards import Card
 from anki.lang import _
@@ -310,6 +310,44 @@ class BrowserPreviewer(MultipleCardsPreviewer):
         self._updatePreviewButtons()
 
 
+class ListCardsPreviewer(MultipleCardsPreviewer):
+    def __init__(self, cards: List[Card], *args, **kwargs):
+        self.index = 0
+        self.cards = cards
+        super().__init__(*args, **kwargs)
+
+    def card(self):
+        if not self.cards:
+            return None
+        return self.cards[0]
+
+    def _openPreview(self):
+        if not self.cards:
+            return
+        super()._openPreview()
+
+    def _onPreviewPrevCard(self):
+        self.index -= 1
+        self._renderPreview()
+
+    def _onPreviewNextCard(self):
+        self.index += 1
+        self._renderPreview()
+
+    def _should_enable_prev(self):
+        return super()._should_enable_prev() or self.index > 0
+
+    def _should_enable_next(self):
+        return super()._should_enable_next() or self.index < len(self.cards) - 1
+
+    def _on_other_side(self):
+        if self._previewState == "question":
+            self._previewState = "answer"
+        else:
+            self._previewState = "question"
+        self._renderPreview()
+
+
 class SingleCardPreviewer(Previewer):
     def __init__(self, card: Card, *args, **kwargs):
         self._card = card