Implement per-screen scrolling of articles.

App.py

@@ -103,6 +103,8 @@ class RightPane(urwid.ListBox):
         self.body = walker
         self.isList = True
         self.articlePosition = 0
+        self.article = None
+        self.chunkNumber = 0
 
     def fill(self, articles):
         items = [urwid.AttrMap(urwid.Columns([(2, urwid.Text("N")), urwid.Text(article["title"])]),
@@ -116,6 +118,13 @@ class RightPane(urwid.ListBox):
 
     def keypress(self, size, key):
         if key in ("j", "down"):
+            if not self.isList:
+                if self.chunkNumber >= len(self.article.chunks) - 1:
+                    pass
+                else:
+                    self.chunkNumber += 1
+                    walker = urwid.SimpleListWalker([urwid.Text(self.article.chunks[self.chunkNumber])])
+                    self.body = walker
             item_size = len(self.body)
             focus_widget, idx = self.get_focus()
             if idx < item_size - 1:
@@ -123,6 +132,13 @@ class RightPane(urwid.ListBox):
                 self.set_focus(idx)
             return
         elif key in ("k", "up"):
+            if not self.isList:
+                if self.chunkNumber == 0:
+                    pass
+                else:
+                    self.chunkNumber -= 1
+                    walker = urwid.SimpleListWalker([urwid.Text(self.article.chunks[self.chunkNumber])])
+                    self.body = walker
             focus_widget, idx = self.get_focus()
             if idx > 0:
                 idx = idx - 1
@@ -131,14 +147,14 @@ class RightPane(urwid.ListBox):
         elif key in ("l", "right"):
             if self.isList is True:
                 self.isList = False
+                self.chunkNumber = 0
                 focus_widget, idx = self.get_focus()
                 self.articlePosition = idx
                 articleId = focus_widget.attr_map[None]
-                article = Article(self.getArticle(articleId))
-                walker = urwid.SimpleListWalker([urwid.Text(""), urwid.Text(article.text), urwid.Text("")])
+                self.article = Article(self.getArticle(articleId))
+                walker = urwid.SimpleListWalker([urwid.Text(self.article.chunks[self.chunkNumber])])
                 self.body = walker
-                self.set_focus(1)
-                tui.rightBox.set_title(article.title)
+                tui.rightBox.set_title(self.article.title)
             return
         elif key in ("h", "left"):
             if self.isList is False:

Render.py

@@ -1,7 +1,29 @@
 from inscriptis import get_text
+import os
 
 
 class Article:
     def __init__(self, articleObj):
         self.text = get_text(articleObj["summary"]["content"])
         self.title = articleObj["title"]
+        terminal_width, terminal_height = os.get_terminal_size()
+        terminal_width -= 60
+        start_of_chunk = 0
+        end_of_chunk = 0
+        rows_passed = 0
+        self.chunks = []
+        i = 0
+        column_position = 0
+        for s in self.text:
+            i += 1
+            column_position += 1
+            if column_position > terminal_width or s == "\n":
+                rows_passed += 1
+                column_position = 0
+                if rows_passed > terminal_height - 2:
+                    end_of_chunk = i
+                    self.chunks.append(self.text[start_of_chunk:end_of_chunk])
+                    start_of_chunk = end_of_chunk
+                    rows_passed = 0
+        if end_of_chunk <= i:
+            self.chunks.append(self.text[start_of_chunk:i])