2 files changed, 63 insertions(+), 15 deletions(-)

M src/pages.py
M src/utils.py

@@ 16,6 16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 import datetime
 import html
+from dataclasses import dataclass
 
 from dateutil.tz import UTC
 


@@ 34,7 35,7 @@ from .widgets import VBox
 
 from . import models
 from .utils import convert_markdown_links, clean_markup, margin
-
+from .utils import InterruptibleTimeout
 
 @Gtk.Template(resource_path="/net/kirgroup/confy/pages/info.ui")
 class PageInfo(Gtk.Box):


@@ 210,6 211,17 @@ class PageList(Gtk.Box):
         self.emit("row-activated")
 
 
+@dataclass
+class ListBuilderCtx:
+    lastobj = None
+    listbox = None
+    data = []
+    guard = None
+
+    def __repr__(self):
+        return f"<ListBuilderCtx lastobj={self.lastobj}, listbox={self.listbox}>"
+
+
 @Gtk.Template(resource_path="/net/kirgroup/confy/pages/events.ui")
 class PageEvents(Gtk.Box):
     __gtype_name__ = "CPageEvents"


@@ 225,6 237,8 @@ class PageEvents(Gtk.Box):
     search_button = Gtk.Template.Child()
     searchbar = Gtk.Template.Child()
 
+    timeout = InterruptibleTimeout()
+
     def get_value(self):
         return self._value
 


@@ 333,30 347,38 @@ class PageEvents(Gtk.Box):
     def update(self, *args):
         data = self.get_objects()
 
+        self.timeout.stop()
+
         # empty box
         w = self.pagebox.get_last_child()
         while w:
             self.pagebox.remove(w)
             w = self.pagebox.get_last_child()
 
-        lastobj = None
-        listbox = None
-        for idx, obj in enumerate(data):
-            header = self.build_header(obj, lastobj)
+        ctx = ListBuilderCtx()
+        ctx.data = data
+        ctx.guard = self.timeout = InterruptibleTimeout(50, self.build_list, ctx)
+
+    def build_list(self, ctx):
+        for idx, obj in enumerate(ctx.data):
+            if ctx.guard.must_stop():
+                return False
+
+            header = self.build_header(obj, ctx.lastobj)
             if header:
-                if listbox:
-                    self.pagebox.append(listbox)
-                    listbox = None
+                ctx.listbox = None
                 self.pagebox.append(header)
 
             row = self.build_row(obj)
-            if listbox is None:
-                listbox = self.build_listbox()
-            listbox.append(row)
-            lastobj = obj
-
-        if listbox:
-            self.pagebox.append(listbox)
+            if ctx.listbox is None:
+                ctx.listbox = self.build_listbox()
+                self.pagebox.append(ctx.listbox)
+            ctx.listbox.append(row)
+            ctx.lastobj = obj
+            if idx >  10:
+                return True
+
+        return False
 
     def build_listbox(self):
         lb = Gtk.ListBox(margin_bottom=20)

@@ 1,6 1,8 @@
 import re
 import html
 
+from gi.repository import GLib
+
 def convert_markdown_links(text):
     """converts markdown links to html hyperlinks"""
     return re.sub("\[([^]]+?)\]\(([^)\s]+?)(?:\s.*?)?\)", r'<a href="\2">\1</a>', text)


@@ 27,3 29,27 @@ def clean_markup(text):
 def margin(val):
     return dict(margin_end=val, margin_start=val, margin_top=val, margin_bottom=val)
 
+
+class InterruptibleTimeout:
+    def __init__(self, intervall=0, callback=None, data=None):
+        self._running = False
+        self._requested_stop = True
+        self._callback = callback
+        if callback:
+            self._running = True
+            self._requested_stop = False
+            GLib.timeout_add(intervall, self._on_timeout, data)
+
+    def _on_timeout(self, data):
+        if self._requested_stop:
+            res = False
+        else:
+            res = self._callback(data)
+        self._running = res
+        return res
+
+    def stop(self):
+        self._requested_stop = True
+
+    def must_stop(self):
+        return self._requested_stop