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72 lines
2.3 KiB
Lua
72 lines
2.3 KiB
Lua
require "unireader"
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DJVUReader = UniReader:new{}
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-- open a DJVU file and its settings store
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-- DJVU does not support password yet
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function DJVUReader:open(filename)
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local ok
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ok, self.doc = pcall(djvu.openDocument, filename, self.cache_document_size)
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if not ok then
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return ok, self.doc -- this will be the error message instead
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end
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return ok
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end
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function DJVUReader:init()
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self:addAllCommands()
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self:adjustDjvuReaderCommand()
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end
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function DJVUReader:adjustDjvuReaderCommand()
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self.commands:del(KEY_J, MOD_SHIFT, "J")
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self.commands:del(KEY_K, MOD_SHIFT, "K")
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self.commands:add(KEY_R, nil, "R",
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"select djvu page rendering mode",
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function(self)
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self:select_render_mode()
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end)
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end
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-- select the rendering mode from those supported by djvulibre.
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-- Note that if the values in the definition of ddjvu_render_mode_t in djvulibre/libdjvu/ddjvuapi.h change,
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-- then we should update our values here also. This is a bit risky, but these values never change, so it should be ok :)
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function DJVUReader:select_render_mode()
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local mode_menu = SelectMenu:new{
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menu_title = "Select DjVu page rendering mode",
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item_array = {
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"COLOUR (works for both colour and b&w pages)", -- 0 (colour page or stencil)
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"BLACK & WHITE (for b&w pages only, much faster)", -- 1 (stencil or colour page)
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"COLOUR ONLY (slightly faster than COLOUR)", -- 2 (colour page or fail)
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"MASK ONLY (for b&w pages only)", -- 3 (stencil or fail)
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"COLOUR BACKGROUND (show only background)", -- 4 (colour background layer)
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"COLOUR FOREGROUND (show only foreground)" -- 5 (colour foreground layer)
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},
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current_entry = self.render_mode,
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}
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local mode = mode_menu:choose(0, fb.bb:getHeight())
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if mode then
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self.render_mode = mode - 1
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self:clearCache()
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end
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self:redrawCurrentPage()
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end
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----------------------------------------------------
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-- highlight support
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----------------------------------------------------
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function DJVUReader:getText(pageno)
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return self.doc:getPageText(pageno)
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end
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-- for incompatible API fixing
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function DJVUReader:invertTextYAxel(pageno, text_table)
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local _, height = self.doc:getOriginalPageSize(pageno)
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for _,text in pairs(text_table) do
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for _,line in ipairs(text) do
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line.y0, line.y1 = (height - line.y1), (height - line.y0)
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end
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end
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return text_table
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end
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