display document metadata (#2307)

display document metadata in file manager and history menu

frontend/apps/filemanager/filemanager.lua

@@ -23,7 +23,9 @@ local util = require("ffi/util")
 local Font = require("ui/font")
 local DEBUG = require("dbg")
 local _ = require("gettext")
-
+local KeyValuePage = require("ui/widget/keyvaluepage")
+local ReaderUI = require("apps/reader/readerui")
+local InfoMessage = require("ui/widget/infomessage")
 
 local function getDefaultDir()
     if Device:isKindle() then
@@ -112,7 +114,6 @@ function FileManager:init()
 
     function file_chooser:onFileSelect(file)  -- luacheck: ignore
         FileManager.instance:onClose()
-        local ReaderUI = require("apps/reader/readerui")
         ReaderUI:showReader(file)
         return true
     end
@@ -197,6 +198,26 @@ function FileManager:init()
                     end,
                 }
             },
+            {
+                {
+                    text = _("Book information"),
+                    enabled = lfs.attributes(file, "mode") == "file" and true or false,
+                    callback = function()
+                        local book_info_metadata = FileManager:bookInformation(file)
+                        if  book_info_metadata then
+                            UIManager:show(KeyValuePage:new{
+                                title = _("Book information"),
+                                kv_pairs = book_info_metadata,
+                            })
+                        else
+                            UIManager:show(InfoMessage:new{
+                                text = _("Cannot fetch information for a selected book"),
+                            })
+                        end
+                        UIManager:close(self.file_dialog)
+                    end,
+                },
+            },
         }
         if lfs.attributes(file, "mode") == "directory" then
             local realpath = util.realpath(file)
@@ -248,6 +269,23 @@ function FileManager:init()
     self:handleEvent(Event:new("SetDimensions", self.dimen))
 end
 
+function FileManager:bookInformation(file)
+    local file_mode = lfs.attributes(file, "mode")
+    if file_mode ~= "file" then return false end
+    local book_stats = DocSettings:open(file):readSetting('stats')
+    if book_stats ~= nil then
+        return FileManagerHistory:buildBookInformationTable(book_stats)
+    end
+    local document = DocumentRegistry:openDocument(file)
+    if document.loadDocument then
+        document:loadDocument()
+        document:render()
+    end
+    book_stats = document:getProps()
+    book_stats.pages = document:getPageCount()
+    return FileManagerHistory:buildBookInformationTable(book_stats)
+end
+
 function FileManager:reinit(path)
     self.dimen = Screen:getSize()
     -- backup the root path and path items
@@ -318,7 +356,6 @@ end
 
 function FileManager:deleteFile(file)
     local ok, err
-    local InfoMessage = require("ui/widget/infomessage")
     local file_abs_path = util.realpath(file)
     if file_abs_path == nil then
         UIManager:show(InfoMessage:new{
@@ -345,7 +382,6 @@ function FileManager:deleteFile(file)
 end
 
 function FileManager:renameFile(file)
-    local InfoMessage = require("ui/widget/infomessage")
     if util.basename(file) ~= self.rename_dialog:getInputText() then
         local dest = util.joinPath(util.dirname(file), self.rename_dialog:getInputText())
         if self:moveFile(file, dest) then

frontend/apps/filemanager/filemanagerhistory.lua

@@ -6,6 +6,11 @@ local Menu = require("ui/widget/menu")
 local Screen = require("device").screen
 local util = require("ffi/util")
 local _ = require("gettext")
+local KeyValuePage = require("ui/widget/keyvaluepage")
+local DocSettings = require("docsettings")
+local InfoMessage = require("ui/widget/infomessage")
+local T = require("ffi/util").template
+
 
 local FileManagerHistory = InputContainer:extend{
     hist_menu_title = _("History"),
@@ -34,6 +39,48 @@ function FileManagerHistory:onSetDimensions(dimen)
     self.dimen = dimen
 end
 
+function FileManagerHistory:buildBookInformationTable(book_props)
+    if book_props == nil then
+        return false
+    end
+
+    if book_props.authors == "" or book_props.authors == nil then
+        book_props.authors = _("N/A")
+    end
+
+    if book_props.title == "" or book_props.title == nil then
+        book_props.title = _("N/A")
+    end
+
+    if book_props.series == "" or book_props.series == nil then
+        book_props.series = _("N/A")
+    end
+
+    if book_props.pages == "" or book_props.pages == nil then
+        book_props.pages = _("N/A")
+    end
+
+    if book_props.language == "" or book_props.language == nil then
+        book_props.language = _("N/A")
+    end
+
+    return {
+        { T(_("Title: %1"), book_props.title), "" },
+        { T(_("Authors: %1"), book_props.authors), "" },
+        { T(_("Series: %1"), book_props.series), "" },
+        { T(_("Pages: %1"), book_props.pages), "" },
+        { T(_("Language: %1"), string.upper(book_props.language)), "" },
+    }
+end
+
+function FileManagerHistory:bookInformation(file)
+    local file_mode = lfs.attributes(file, "mode")
+    if file_mode ~= "file" then return false end
+    local book_stats = DocSettings:open(file):readSetting('stats')
+    if book_stats == nil then return false end
+    return self:buildBookInformationTable(book_stats)
+end
+
 function FileManagerHistory:onMenuHold(item)
     self.histfile_dialog = ButtonDialog:new{
         buttons = {
@@ -48,6 +95,25 @@ function FileManagerHistory:onMenuHold(item)
                     end,
                 },
             },
+            {
+                {
+                    text = _("Book information"),
+                    callback = function()
+                        local book_info_metadata = FileManagerHistory:bookInformation(item.file)
+                        if  book_info_metadata then
+                            UIManager:show(KeyValuePage:new{
+                                title = _("Book information"),
+                                kv_pairs = book_info_metadata,
+                            })
+                        else
+                            UIManager:show(InfoMessage:new{
+                                text = _("Cannot fetch information for a selected book"),
+                            })
+                        end
+                        UIManager:close(self.histfile_dialog)
+                    end,
+                 },
+            },
         },
     }
     UIManager:show(self.histfile_dialog)