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mod: code cleanup for readers

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closes #26
This commit is contained in:
Qingping Hou
2012-03-05 09:58:19 +08:00
parent b318ca08e3
commit 50d5604c79
3 changed files with 34 additions and 72 deletions
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60
djvureader.lua
View File

@@ -12,64 +12,8 @@ function DJVUReader:init()
end
-- open a DJVU file and its settings store
-- DJVU does not support password yet
function DJVUReader:open(filename)
self.doc = djvu.openDocument(filename)
if self.doc ~= nil then
self.settings = DocSettings:open(filename)
local gamma = self.settings:readsetting("gamma")
if gamma then
self.globalgamma = gamma
end
return true
end
return false
end
--set viewer state according to zoom state
function DJVUReader:setzoom(page)
local dc = self.newDC()
local pwidth, pheight = page:getSize(self.nulldc)
if self.globalzoommode == self.ZOOM_FIT_TO_PAGE then
self.globalzoom = width / pwidth
self.offset_x = 0
self.offset_y = (height - (self.globalzoom * pheight)) / 2
if height / pheight < self.globalzoom then
self.globalzoom = height / pheight
print(width, (self.globalzoom * pwidth))
self.offset_x = (width - (self.globalzoom * pwidth)) / 2
self.offset_y = 0
end
elseif self.globalzoommode == self.ZOOM_FIT_TO_PAGE_WIDTH then
self.globalzoom = width / pwidth
self.offset_x = 0
self.offset_y = (height - (self.globalzoom * pheight)) / 2
elseif self.globalzoommode == self.ZOOM_FIT_TO_PAGE_HEIGHT then
self.globalzoom = height / pheight
self.offset_x = (width - (self.globalzoom * pwidth)) / 2
self.offset_y = 0
end
dc:setZoom(self.globalzoom)
-- record globalzoom for manual zoom in/out
self.globalzoom_orig = self.globalzoom
dc:setRotate(self.globalrotate);
dc:setOffset(self.offset_x, self.offset_y)
self.fullwidth, self.fullheight = page:getSize(dc)
self.min_offset_x = fb.bb:getWidth() - self.fullwidth
self.min_offset_y = fb.bb:getHeight() - self.fullheight
if(self.min_offset_x > 0) then
self.min_offset_x = 0
end
if(self.min_offset_y > 0) then
self.min_offset_y = 0
end
-- set gamma here, we don't have any other good place for this right now:
if self.globalgamma ~= self.GAMMA_NO_GAMMA then
print("gamma correction: "..self.globalgamma)
dc:setGamma(self.globalgamma)
end
return dc
return self:loadSettings(filename)
end

10
pdfreader.lua
View File

@@ -14,13 +14,5 @@ end
-- open a PDF file and its settings store
function PDFReader:open(filename, password)
self.doc = pdf.openDocument(filename, password or "")
if self.doc ~= nil then
self.settings = DocSettings:open(filename)
local gamma = self.settings:readsetting("gamma")
if gamma then
self.globalgamma = gamma
end
return true
end
return false
return self:loadSettings(filename)
end

36
unireader.lua
View File

@@ -72,10 +72,41 @@ function UniReader:new(o)
return o
end
--[[
For a new specific reader,
you must always overwrite following two methods:
* self:init()
* self:open()
overwrite other methods if needed.
--]]
function UniReader:init()
print("empty initialization method!")
end
-- open a file and its settings store
-- tips: you can use self:loadSettings in open() method.
function UniReader:open(filename, password)
return false
end
--[ following are default methods ]--
function UniReader:loadSettings(filename)
if self.doc ~= nil then
self.settings = DocSettings:open(filename)
local gamma = self.settings:readsetting("gamma")
if gamma then
self.globalgamma = gamma
end
return true
end
return false
end
-- guarantee that we have enough memory in cache
function UniReader:cacheclaim(size)
if(size > self.cache_max_memsize) then
@@ -136,11 +167,6 @@ function UniReader:clearcache()
self.cache_current_memsize = 0
end
-- open a file and its settings store
function UniReader:open(filename, password)
return false
end
-- set viewer state according to zoom state
function UniReader:setzoom(page)
local dc = self.newDC()