cleanup: expand tab to 4 spaces

frontend/document/djvudocument.lua

@@ -7,113 +7,113 @@ local Configurable = require("ui/reader/configurable")
 local DrawContext = require("ffi/drawcontext")
 
 local DjvuDocument = Document:new{
-	_document = false,
-	-- libdjvulibre manages its own additional cache, default value is hard written in c module.
-	djvulibre_cache_size = nil,
-	dc_null = DrawContext.new(),
-	options = KoptOptions,
-	koptinterface = nil,
+    _document = false,
+    -- libdjvulibre manages its own additional cache, default value is hard written in c module.
+    djvulibre_cache_size = nil,
+    dc_null = DrawContext.new(),
+    options = KoptOptions,
+    koptinterface = nil,
 }
 
 -- check DjVu magic string to validate
 local function validDjvuFile(filename)
-	f = io.open(filename, "r")
-	if not f then return false end
-	local magic = f:read(8)
-	f:close()
-	if not magic or magic ~= "AT&TFORM" then return false end
-	return true
+    f = io.open(filename, "r")
+    if not f then return false end
+    local magic = f:read(8)
+    f:close()
+    if not magic or magic ~= "AT&TFORM" then return false end
+    return true
 end
 
 function DjvuDocument:init()
-	local djvu = require("libs/libkoreader-djvu")
-	self.koptinterface = require("document/koptinterface")
-	self.configurable:loadDefaults(self.options)
-	if not validDjvuFile(self.file) then
-		self.error_message = "Not a valid DjVu file"
-		return
-	end
+    local djvu = require("libs/libkoreader-djvu")
+    self.koptinterface = require("document/koptinterface")
+    self.configurable:loadDefaults(self.options)
+    if not validDjvuFile(self.file) then
+        self.error_message = "Not a valid DjVu file"
+        return
+    end
 
-	local ok
-	ok, self._document = pcall(djvu.openDocument, self.file, self.djvulibre_cache_size)
-	if not ok then
-		self.error_message = self.doc -- will contain error message
-		return
-	end
-	self.is_open = true
-	self.info.has_pages = true
-	self.info.configurable = true
-	self:_readMetadata()
+    local ok
+    ok, self._document = pcall(djvu.openDocument, self.file, self.djvulibre_cache_size)
+    if not ok then
+        self.error_message = self.doc -- will contain error message
+        return
+    end
+    self.is_open = true
+    self.info.has_pages = true
+    self.info.configurable = true
+    self:_readMetadata()
 end
 
 function DjvuDocument:invertTextYAxel(pageno, text_table)
-	local _, height = self.doc:getOriginalPageSize(pageno)
-	for _,text in pairs(text_table) do
-		for _,line in ipairs(text) do
-			line.y0, line.y1 = (height - line.y1), (height - line.y0)
-		end
-	end
-	return text_table
+    local _, height = self.doc:getOriginalPageSize(pageno)
+    for _,text in pairs(text_table) do
+        for _,line in ipairs(text) do
+            line.y0, line.y1 = (height - line.y1), (height - line.y0)
+        end
+    end
+    return text_table
 end
 
 function DjvuDocument:getPageTextBoxes(pageno)
-	return self._document:getPageText(pageno)
+    return self._document:getPageText(pageno)
 end
 
 function DjvuDocument:getWordFromPosition(spos)
-	return self.koptinterface:getWordFromPosition(self, spos)
+    return self.koptinterface:getWordFromPosition(self, spos)
 end
 
 function DjvuDocument:getTextFromPositions(spos0, spos1)
-	return self.koptinterface:getTextFromPositions(self, spos0, spos1)
+    return self.koptinterface:getTextFromPositions(self, spos0, spos1)
 end
 
 function DjvuDocument:getPageBoxesFromPositions(pageno, ppos0, ppos1)
-	return self.koptinterface:getPageBoxesFromPositions(self, pageno, ppos0, ppos1)
+    return self.koptinterface:getPageBoxesFromPositions(self, pageno, ppos0, ppos1)
 end
 
 function DjvuDocument:getOCRWord(pageno, wbox)
-	return self.koptinterface:getOCRWord(self, pageno, wbox)
+    return self.koptinterface:getOCRWord(self, pageno, wbox)
 end
 
 function DjvuDocument:getOCRText(pageno, tboxes)
-	return self.koptinterface:getOCRText(self, pageno, tboxes)
+    return self.koptinterface:getOCRText(self, pageno, tboxes)
 end
 
 function DjvuDocument:getPageRegions(pageno)
-	return self.koptinterface:getPageRegions(self, pageno)
+    return self.koptinterface:getPageRegions(self, pageno)
 end
 
 function DjvuDocument:getUsedBBox(pageno)
-	-- djvu does not support usedbbox, so fake it.
-	local used = {}
-	local native_dim = self:getNativePageDimensions(pageno)
-	used.x0, used.y0, used.x1, used.y1 = 0, 0, native_dim.w, native_dim.h
-	return used
+    -- djvu does not support usedbbox, so fake it.
+    local used = {}
+    local native_dim = self:getNativePageDimensions(pageno)
+    used.x0, used.y0, used.x1, used.y1 = 0, 0, native_dim.w, native_dim.h
+    return used
 end
 
 function DjvuDocument:getPageBBox(pageno)
-	return self.koptinterface:getPageBBox(self, pageno)
+    return self.koptinterface:getPageBBox(self, pageno)
 end
 
 function DjvuDocument:getPageDimensions(pageno, zoom, rotation)
-	return self.koptinterface:getPageDimensions(self, pageno, zoom, rotation)
+    return self.koptinterface:getPageDimensions(self, pageno, zoom, rotation)
 end
 
 function DjvuDocument:renderPage(pageno, rect, zoom, rotation, gamma, render_mode)
-	return self.koptinterface:renderPage(self, pageno, rect, zoom, rotation, gamma, render_mode)
+    return self.koptinterface:renderPage(self, pageno, rect, zoom, rotation, gamma, render_mode)
 end
 
 function DjvuDocument:hintPage(pageno, zoom, rotation, gamma, render_mode)
-	return self.koptinterface:hintPage(self, pageno, zoom, rotation, gamma, render_mode)
+    return self.koptinterface:hintPage(self, pageno, zoom, rotation, gamma, render_mode)
 end
 
 function DjvuDocument:drawPage(target, x, y, rect, pageno, zoom, rotation, gamma, render_mode)
-	return self.koptinterface:drawPage(self, target, x, y, rect, pageno, zoom, rotation, gamma, render_mode)
+    return self.koptinterface:drawPage(self, target, x, y, rect, pageno, zoom, rotation, gamma, render_mode)
 end
 
 function DjvuDocument:register(registry)
-	registry:addProvider("djvu", "application/djvu", self)
+    registry:addProvider("djvu", "application/djvu", self)
 end
 
 return DjvuDocument