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ReadHistory: nil guard a Document instance access

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We're now more careful about this, so, I suppose weird timings may mean
we might be trying to access a nil here.

Fix #7706

Guard a few other similar constructs
This commit is contained in:
NiLuJe
2021-05-18 18:20:34 +02:00
parent 6dc1c1efca
commit 90c38e2d0d
3 changed files with 6 additions and 6 deletions
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2
frontend/apps/filemanager/filemanagerhistory.lua
View File

@@ -44,7 +44,7 @@ end
function FileManagerHistory:onMenuHold(item)
local readerui_instance = require("apps/reader/readerui"):_getRunningInstance()
local currently_opened_file = readerui_instance and readerui_instance.document.file
local currently_opened_file = readerui_instance and readerui_instance.document and readerui_instance.document.file
self.histfile_dialog = nil
local buttons = {
{

2
frontend/readhistory.lua
View File

@@ -30,7 +30,7 @@ local function buildEntry(input_time, input_file)
-- mandatory = file_exists and util.getFriendlySize(lfs.attributes(input_file, "size") or 0),
mandatory_func = function() -- Show the last read time (rather than file size)
local readerui_instance = require("apps/reader/readerui"):_getRunningInstance()
local currently_opened_file = readerui_instance and readerui_instance.document.file
local currently_opened_file = readerui_instance and readerui_instance.document and readerui_instance.document.file
local last_read_ts
if file_path == currently_opened_file then
-- Don't use the sidecar file date which is updated regularly while

8
frontend/ui/screensaver.lua
View File

@@ -118,7 +118,7 @@ local function expandSpecial(message, fallback)
local ReaderUI = require("apps/reader/readerui")
local ui = ReaderUI:_getRunningInstance()
if ui then
if ui and ui.document then
-- If we have a ReaderUI instance, use it.
local doc = ui.document
currentpage = ui.view.state.page or currentpage
@@ -303,7 +303,7 @@ end
function Screensaver:isExcluded()
local ReaderUI = require("apps/reader/readerui")
local ui = ReaderUI:_getRunningInstance()
if ui then
if ui and ui.doc_settings then
local doc_settings = ui.doc_settings
return doc_settings:isTrue("exclude_screensaver")
else
@@ -415,7 +415,7 @@ function Screensaver:setup(event, fallback_message)
local excluded
if DocSettings:hasSidecarFile(self.lastfile) then
local doc_settings
if ui then
if ui and ui.doc_settings then
doc_settings = ui.doc_settings
else
doc_settings = DocSettings:open(self.lastfile)
@@ -427,7 +427,7 @@ function Screensaver:setup(event, fallback_message)
end
if not excluded then
if self.lastfile and lfs.attributes(self.lastfile, "mode") == "file" then
if ui then
if ui and ui.document then
local doc = ui.document
self.image = doc:getCoverPageImage()
else