Work on refactoring the books view

src/calibre/srv/code.py

@@ -113,6 +113,52 @@ def update_interface_data(ctx, rd):
     return basic_interface_data(ctx, rd)
 
 
+def get_library_init_data(ctx, rd, db, num, sorts, orders):
+    ans = {}
+    with db.safe_read_lock:
+        try:
+            ans['search_result'] = search_result(ctx, rd, db, rd.query.get('search', ''), num, 0, ','.join(sorts), ','.join(orders))
+        except ParseException:
+            ans['search_result'] = search_result(ctx, rd, db, '', num, 0, ','.join(sorts), ','.join(orders))
+        sf = db.field_metadata.ui_sortable_field_keys()
+        sf.pop('ondevice', None)
+        ans['sortable_fields'] = sorted(((
+            sanitize_sort_field_name(db.field_metadata, k), v) for k, v in sf.iteritems()),
+                                        key=lambda (field, name):sort_key(name))
+        ans['field_metadata'] = db.field_metadata.all_metadata()
+        mdata = ans['metadata'] = {}
+        try:
+            extra_books = set(int(x) for x in rd.query.get('extra_books', '').split(','))
+        except Exception:
+            extra_books = ()
+        for coll in (ans['search_result']['book_ids'], extra_books):
+            for book_id in coll:
+                if book_id not in mdata:
+                    data = book_as_json(db, book_id)
+                    if data is not None:
+                        mdata[book_id] = data
+    return ans
+
+
+@endpoint('/interface-data/books-init', postprocess=json)
+def books(ctx, rd):
+    '''
+    Get data to create list of books
+
+    Optional: ?num=50&sort=timestamp.desc&library_id=<default library>
+              &search=''&extra_books=''
+    '''
+    ans = {}
+    try:
+        num = int(rd.query.get('num', DEFAULT_NUMBER_OF_BOOKS))
+    except Exception:
+        raise HTTPNotFound('Invalid number of books: %r' % rd.query.get('num'))
+    library_id, db, sorts, orders = get_basic_query_data(ctx, rd)
+    ans = get_library_init_data(ctx, rd, db, num, sorts, orders)
+    ans['library_id'] = library_id
+    return ans
+
+
 @endpoint('/interface-data/init', postprocess=json)
 def interface_data(ctx, rd):
     '''
@@ -139,29 +185,7 @@ def interface_data(ctx, rd):
         num = int(rd.query.get('num', DEFAULT_NUMBER_OF_BOOKS))
     except Exception:
         raise HTTPNotFound('Invalid number of books: %r' % rd.query.get('num'))
-    with db.safe_read_lock:
-        try:
-            ans['search_result'] = search_result(ctx, rd, db, rd.query.get('search', ''), num, 0, ','.join(sorts), ','.join(orders))
-        except ParseException:
-            ans['search_result'] = search_result(ctx, rd, db, '', num, 0, ','.join(sorts), ','.join(orders))
-        sf = db.field_metadata.ui_sortable_field_keys()
-        sf.pop('ondevice', None)
-        ans['sortable_fields'] = sorted(((
-            sanitize_sort_field_name(db.field_metadata, k), v) for k, v in sf.iteritems()),
-                                        key=lambda (field, name):sort_key(name))
-        ans['field_metadata'] = db.field_metadata.all_metadata()
-        mdata = ans['metadata'] = {}
-        try:
-            extra_books = set(int(x) for x in rd.query.get('extra_books', '').split(','))
-        except Exception:
-            extra_books = ()
-        for coll in (ans['search_result']['book_ids'], extra_books):
-            for book_id in coll:
-                if book_id not in mdata:
-                    data = book_as_json(db, book_id)
-                    if data is not None:
-                        mdata[book_id] = data
-
+    ans.update(get_library_init_data(ctx, rd, db, num, sorts, orders))
     return ans
 
 

src/pyj/book_list/cover_grid.pyj

@@ -11,7 +11,7 @@ THUMBNAIL_MAX_HEIGHT = 400
 BORDER_RADIUS = 10
 
 def cover_grid_css():
-    sel = '#' + this
+    sel = '.' + this
     ans = build_rule(sel, display='flex', flex_wrap='wrap', justify_content='space-around', align_items='flex-end', align_content='flex-start', user_select='none', overflow='hidden')
 
     # Container for an individual cover
@@ -65,4 +65,3 @@ def create_item(book_id, interface_data, onclick):
 def append_item(container, item):
     first_filler = container.lastChild.querySelector('.cover-grid-filler')
     container.lastChild.insertBefore(item, first_filler)
-

src/pyj/book_list/home.pyj

@@ -4,10 +4,12 @@ from __python__ import hash_literals, bound_methods
 
 from dom import ensure_id
 from elementmaker import E
+from session import get_interface_data
+from gettext import gettext as _
 
 from book_list.globals import get_db
 from book_list.top_bar import create_top_bar
-from book_list.ui import set_default_panel_handler
+from book_list.ui import set_default_panel_handler, show_panel
 
 
 def show_recent():
@@ -23,9 +25,27 @@ def show_recent():
 def init(container_id):
     create_top_bar(container_id, run_animation=True)
     container = document.getElementById(container_id)
+    interface_data = get_interface_data()
+
+    # Recent books
     recent = E.div(style='display:none')
     recent_container_id = ensure_id(recent)
     container.appendChild(recent)
     window.setTimeout(show_recent.bind(recent_container_id), 5)
 
+    # Choose library
+    cl = E.div(
+        E.h2(_('Choose the calibre library to browse...'))
+    )
+    container.appendChild(cl)
+    lids = sorted(interface_data.library_map, key=def(x): return interface_data.library_map[x];)
+    for library_id in lids:
+        library_name = interface_data.library_map[library_id]
+        if library_name:
+            cl.appendChild(E.div(E.a(library_name, href='javascript: void(0)', title=library_name, data_lid=library_id, onclick=def(ev):
+                lib_id = ev.currentTarget.dataSet.lid
+                show_panel('book_list', {'library_id': lib_id})
+            )))
+
+
 set_default_panel_handler(init)

src/pyj/book_list/library_data.pyj

@@ -0,0 +1,46 @@
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
+from __python__ import hash_literals, bound_methods
+
+from ajax import ajax
+from session import get_interface_data
+from utils import parse_url_params
+
+
+load_status = {'loading':True, 'ok':False, 'error_html':None, 'current_fetch': None}
+library_data = {}
+current_fetch = None
+
+
+def current_library_id():
+    return parse_url_params().library_id or get_interface_data().library_id
+
+
+def update_library_data(data):
+    load_status.loading = False
+    load_status.ok = True
+    load_status.error_html = None
+    for key in 'search_result sortable_fields field_metadata metadata'.split(' '):
+        library_data[key] = data[key]
+
+
+def on_data_loaded(end_type, xhr, ev):
+    load_status.current_fetch = None
+    if end_type is 'load':
+        data = JSON.parse(xhr.responseText)
+        update_library_data(data)
+    else:
+        load_status.ok = False
+        load_status.loading = False
+        load_status.error_html = xhr.error_html
+
+
+def fetch_init_data():
+    if load_status.current_fetch:
+        load_status.current_fetch.abort()
+    query = {'library_id': current_library_id()}
+    url_query = parse_url_params()
+    for key in url_query:
+        query[key] = url_query[key]
+    load_status.current_fetch = ajax('interface-data/books-init', on_data_loaded, query=query)
+    load_status.current_fetch.send()

src/pyj/book_list/main.pyj

@@ -13,14 +13,16 @@ from popups import install_event_filters
 from utils import parse_url_params
 
 from book_list.constants import book_list_container_id, read_book_container_id
+from book_list.library_data import fetch_init_data
 from book_list.theme import get_color
-from book_list.router import update_window_title, set_default_mode_handler, apply_url, set_mode_handler
+from book_list.router import update_window_title, set_default_mode_handler, apply_url, set_mode_handler, on_pop_state
 from book_list.globals import get_db, set_session_data
 from book_list.ui import apply_url_state as book_list_mode_handler
 from read_book.ui import ReadUI
 
 # Register the various panels
 import book_list.home  # noqa: unused-import
+import book_list.views # noqa: unused-import
 
 
 def remove_initial_progress_bar():
@@ -48,6 +50,10 @@ def init_ui():
     install_event_filters()
     set_default_mode_handler(book_list_mode_handler)
     window.onerror = onerror
+    setTimeout(def():
+            window.onpopstate = on_pop_state
+        , 0)  # We do this after event loop ticks over to avoid catching popstate events that some browsers send on page load
+
     translations = get_translations()
     if translations:
         install(translations)
@@ -65,6 +71,7 @@ def init_ui():
     set_mode_handler('read_book', read_ui.apply_url_state.bind(read_ui))
     apply_url()
 
+
 def on_data_loaded(end_type, xhr, ev):
     remove_initial_progress_bar()
     if end_type is 'load':
@@ -84,11 +91,13 @@ def on_data_loaded(end_type, xhr, ev):
             p.innerHTML = xhr.error_html
         document.body.appendChild(p)
 
+
 def on_data_load_progress(loaded, total):
     p = document.querySelector('#page_load_progress > progress')
     p.max = total
     p.value = loaded
 
+
 def load_interface_data():
     temp = UserSessionData(None, {})  # So that settings for anonymous users are preserved
     query = {}
@@ -102,7 +111,7 @@ def load_interface_data():
     ajax('interface-data/init', on_data_loaded, on_data_load_progress, query=query).send()
 
 
-def on_update_interface_data():
+def do_update_interface_data():
     ajax('interface-data/update', def (end_type, xhr, ev):
         if end_type is 'load':
             data = JSON.parse(xhr.responseText)
@@ -117,5 +126,6 @@ def main():
     else:
         sd = UserSessionData(interface_data.username, interface_data.user_session_data)
         set_session_data(sd)
-        on_update_interface_data()
+        do_update_interface_data()
+        fetch_init_data()
         init_ui()

src/pyj/book_list/router.pyj

@@ -2,6 +2,8 @@
 # License: GPL v3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
 from __python__ import hash_literals, bound_methods
 
+from ajax import encode_query
+
 from book_list.constants import read_book_container_id, book_list_container_id
 from book_list.globals import get_current_query
 from utils import parse_url_params
@@ -26,7 +28,7 @@ def update_window_title(subtitle, title='calibre', sep=' :: '):
 
 
 def is_reading_book():
-    cq = get_current_query
+    cq = get_current_query()
     return cq and cq.mode is read_book_mode
 
 
@@ -36,17 +38,42 @@ def apply_mode(mode):
         div.style.display = 'block' if div.id is divid else 'none'
 
 
-def apply_url():
+def apply_url(ignore_handler):
     data = parse_url_params()
     data.mode = data.mode or 'book_list'
     get_current_query(data)
     apply_mode()
-    handler = mode_handlers[data.mode] or default_mode_handler
-    handler(data)
+    if not ignore_handler:
+        handler = mode_handlers[data.mode] or default_mode_handler
+        handler(data)
 
 
-def push_state(query, replace=False, mode='book_list'):
+history_count = 0
+
+
+def push_state(query, replace=False, mode='book_list', call_handler=True):
+    nonlocal history_count
     query = {k:query[k] for k in query}
     if mode is not 'book_list':
         query.mode = mode
-    # TODO: Implement this (see push_state in boos.pyj)
+    query = encode_query(query) or '?'
+    if replace:
+        window.history.replaceState(None, '', query)
+    else:
+        window.history.pushState(None, '', query)
+        history_count += 1
+    apply_url(not call_handler)
+
+
+def on_pop_state(ev):
+    nonlocal history_count
+    history_count = max(0, history_count - 1)
+    apply_url()
+
+
+def back():
+    nonlocal history_count
+    if history_count > 0:
+        window.back()
+    else:
+        push_state({}, replace=True)

src/pyj/book_list/ui.pyj

@@ -7,6 +7,8 @@ from elementmaker import E
 
 from book_list.constants import book_list_container_id
 from book_list.globals import get_current_query
+from book_list.router import push_state, back as router_back
+from book_list.library_data import current_library_id
 
 
 panel_handlers = {}
@@ -38,13 +40,51 @@ def develop_panel(container):
 set_panel_handler('develop-widgets', develop_panel)
 
 
+def currently_showing_panel():
+    c = document.getElementById(book_list_container_id)
+    return c.dataset.panel
+
+def number_of_subpanels():
+    c = document.getElementById(book_list_container_id)
+    return c.lastChild.childNodes.length
+
+
+def show_panel(panel, query_data, replace=False):
+    if currently_showing_panel() is panel:
+        return
+    query = {k:query_data[k] for k in query}
+    if panel is not 'home':
+        lid = current_library_id()
+        if lid:
+            query.library_id = lid
+    push_state(query, replace=replace)
+
+
+def close_subpanel():
+    c = document.getElementById(book_list_container_id).lastChild
+    panel_to_remove = c.lastChild
+    if panel_to_remove:
+        c.remove(panel_to_remove)
+        if c.lastChild:
+            c.lastChild.style.display = 'block'
+        else:
+            c.style.display = 'none'
+
+
+def back():
+    if number_of_subpanels() > 0:
+        return close_subpanel()
+    router_back()
+
+
 def apply_url_state(state):
     panel = state.panel or 'home'
-    c = document.getElementById(book_list_container_id)
-    if c.dataset.panel is panel:
+    if currently_showing_panel() is panel:
         return
+    c = document.getElementById(book_list_container_id)
     clear(c)
-    c.appendChild(E.div()), c.appendChild(E.div(style='display:none'))
+    c.appendChild(E.div())
+    c.appendChild(E.div(style='display:none'))
     c.dataset.panel = panel
     handler = panel_handlers[panel] or default_panel_handler
     handler(ensure_id(c.firstChild, 'panel'))

src/pyj/book_list/views.pyj

@@ -4,25 +4,31 @@ from __python__ import hash_literals
 
 import traceback
 from ajax import ajax_send
-from dom import set_css, add_extra_css, unique_id
+from dom import set_css, add_extra_css
 from elementmaker import E
 from gettext import gettext as _
 from modals import error_dialog, ajax_progress_dialog
 
-from book_list.globals import get_session_data, get_boss
+from book_list.globals import get_session_data
 from book_list.cover_grid import cover_grid_css, create_item as create_cover_grid_item, init as init_cover_grid, append_item as cover_grid_append_item
+from book_list.top_bar import create_top_bar
+from book_list.ui import back, set_panel_handler
 from widgets import create_button, create_spinner
 
-bv_counter = 0
-
-CLASS_NAME = 'books-main-list'
-COVER_GRID = unique_id('cover-grid')
+COVER_GRID_CLASS = 'book-list-cover-grid'
 
 add_extra_css(def():
-    ans = cover_grid_css.call(COVER_GRID)
+    ans = cover_grid_css.call(COVER_GRID_CLASS)
     return ans
 )
 
+def init(container_id):
+    create_top_bar(container_id, title=_('Books'), action=back, icon='close')
+
+
+set_panel_handler('book_list', init)
+
+
 class BooksView:
 
     def __init__(self, interface_data, book_list_container):

src/pyj/utils.pyj

@@ -25,13 +25,18 @@ def debounce(func, wait, immediate=False):
             func.apply(context, args)
 
 def parse_url_params(url=None, allow_multiple=False):
+    cache = parse_url_params.cache
     url = url or window.location.href
+    if cache[url]:
+        return parse_url_params.cache[url]
     qs = url.indexOf('?')
     ans = {}
     if qs < 0:
+        cache[url] = ans
         return ans
     q = url.slice(qs + 1, ((url.indexOf('#') + 1) or (url.length + 1)))
     if not q:
+        cache[url] = ans
         return ans
     pairs = q.replace(/\+/g, " ").split("&")
     for pair in pairs:
@@ -43,7 +48,9 @@ def parse_url_params(url=None, allow_multiple=False):
             ans[key].append(val)
         else:
             ans[key] = val
+    cache[url] = ans
     return ans
+parse_url_params.cache = {}
 
 _roman = list(zip(
 [1000,900,500,400,100,90,50,40,10,9,5,4,1],