DeckBro implementation

app/bro.py

@@ -0,0 +1,146 @@
+# DeckBro: a simple DeckText/HTML browser for T-DeckARD environment
+# Usage: from app.bro import DeckBro
+# Created by Luxferre in 2025-2026, released into public domain
+
+from deck.pager import print_paged
+from deck.input import input, input_multi
+from deck.menu import menu
+from deck.http import http_fetch, http_set_ua
+from deck.text import DeckText
+
+class DeckBro:
+  def __init__(self, start_url=None):
+    self.history = []
+    self.rendered_pages = []
+    self.history_pos = 0 # always refers to the current slot
+    self.url = start_url
+    self.doc = DeckText()
+    if self.url:
+      self.go(self.url)
+
+  def render(self):
+    pagenum = 1
+    pagetotal = len(self.doc.pages)
+    self.rendered_pages = []
+    for page in self.doc.pages:
+      outtext = f'{self.doc.title} ({pagenum}/{pagetotal})\n---\n'
+      outtext += page['content']
+      if len(page['links']) > 0:
+        linknum = 1
+        outtext += '\n--- Links ---\n'
+        for l in page['links']:
+          outtext += f'[{linknum}] {l[1]}: {l[0]}\n'
+          linknum += 1
+      self.rendered_pages.append(outtext)
+      pagenum += 1
+    return len(self.rendered_pages)
+
+  def display(self):
+    curpage = 1
+    totalpages = len(self.rendered_pages)
+    menustring = 'g)o r)ef b)ack f)wd n)ext p)rev l)ink or pg#: '
+    do_new_display = True
+    while True:
+      if do_new_display and curpage > 0 and curpage <= totalpages:
+        print_paged(self.rendered_pages[curpage - 1])
+      print(f'[{self.url}]')
+      user_choice = input(menustring).strip()
+      pgnum = None
+      try: # page number input detection
+        pgnum = int(user_choice)
+      except: pass
+      if pgnum is not None:
+        if pgnum > 0 and pgnum <= totalpages:
+          curpage = pgnum
+          do_new_display = True
+        else:
+          print('Invalid page number!')
+          do_new_display = False
+        continue
+      user_opt = ''
+      try:
+        user_opt = ' '.join(user_choice.split(' ')[1:])
+      except: pass
+      if user_choice == '':
+        user_choice = 'n' # go to the next page by default
+      ch_letter = user_choice[0].lower()
+      if ch_letter == 'q': break
+      elif ch_letter == 'n':
+        do_new_display = True
+        curpage += 1
+        if curpage > totalpages: # wrap around
+          curpage = 1
+      elif ch_letter == 'p':
+        do_new_display = True
+        curpage -= 1
+        if curpage < 1: # wrap around
+          curpage = totalpages
+      elif ch_letter == 'g':
+        self.go(user_opt)
+        break
+      elif ch_letter == 'l':
+        addr = None
+        try:
+          lnum = int(user_opt)
+          addr = self.doc.pages[curpage - 1]['links'][lnum - 1][0]
+        except: pass
+        if addr is None:
+          print('Invalid link number entered!')
+          do_new_display = False
+        else:
+          self.go(addr)
+          break
+      elif ch_letter == 'r':
+        self.refresh()
+        break
+      elif ch_letter == 'b':
+        if self.back() is not None:
+          break
+        else:
+          do_new_display = False
+      elif ch_letter == 'f':
+        if self.forward() is not None:
+          break
+        else:
+          do_new_display = False
+
+  def go(self, url=None, update_history=True):
+    if url:
+      self.url = url.strip()
+      status, pagetext = http_fetch(self.url)
+      if status != 200:
+        if pagetext == '':
+          pagetext = f'Error {status}'
+        else:
+          pagetext = f'Error {status}: \n{pagetext}'
+      self.doc.load(pagetext)
+      if len(self.doc.pages) > 0 and update_history:
+        self.history = self.history[0:self.history_pos+1]
+        self.history.append(self.url)
+        self.history_pos = len(self.history) - 1
+    self.render()
+    self.display()
+
+  def refresh(self):
+    self.go(self.url, update_history=False)
+
+  def back(self):
+    if self.history_pos > 0:
+      self.history_pos -= 1
+      new_url = self.history[self.history_pos]
+      self.go(new_url, update_history=False)
+      return new_url
+    return None
+
+  def forward(self):
+    if self.history_pos < len(self.history) - 1:
+      self.history_pos += 1
+      new_url = self.history[self.history_pos]
+      self.go(new_url, update_history=False)
+      return new_url
+    return None
+
+# create and start a default DeckBro instance
+def bro(url=None):
+  inst = DeckBro()
+  inst.go(url)