add current bbox in page rendering hash

So that changing bbox could take effect on current page.

frontend/document/koptinterface.lua

@@ -178,7 +178,7 @@ KoptOptions = {
 KoptInterface = {}
 
 -- get reflow context
-function KoptInterface:getKOPTContext(doc, pageno)
+function KoptInterface:getKOPTContext(doc, pageno, bbox)
 	local kc = KOPTContext.new()
 	kc:setTrim(doc.configurable.trim_page)
 	kc:setWrap(doc.configurable.text_wrap)
@@ -196,7 +196,6 @@ function KoptInterface:getKOPTContext(doc, pageno)
 	kc:setDefectSize(doc.configurable.defect_size)
 	kc:setLineSpacing(doc.configurable.line_spacing)
 	kc:setWordSpacing(doc.configurable.word_spacing)
-	local bbox = doc:getPageBBox(pageno)
 	kc:setBBox(bbox.x0, bbox.y0, bbox.x1, bbox.y1)
 	return kc
 end
@@ -204,10 +203,11 @@ end
 -- calculates page dimensions
 function KoptInterface:getPageDimensions(doc, pageno, zoom, rotation)
 	-- check cached page size
-	local hash = "kctx|"..doc.file.."|"..pageno.."|"..doc.configurable:hash('|')
+	self.cur_bbox = doc:getPageBBox(pageno)
+	local hash = "kctx|"..doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..tostring(self.cur_bbox)
 	local cached = Cache:check(hash)
 	if not cached then
-		local kc = self:getKOPTContext(doc, pageno)
+		local kc = self:getKOPTContext(doc, pageno, self.cur_bbox)
 		local page = doc._document:openPage(pageno)
 		-- reflow page
 		page:reflow(kc, 0)
@@ -227,7 +227,8 @@ end
 
 function KoptInterface:renderPage(doc, pageno, rect, zoom, rotation, render_mode)
 	doc.render_mode = render_mode
-	local hash = "renderpg|"..doc.file.."|"..pageno.."|"..doc.configurable:hash('|')
+	self.cur_bbox = doc:getPageBBox(pageno)
+	local hash = "renderpg|"..doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..tostring(self.cur_bbox)
 	local page_size = self:getPageDimensions(doc, pageno, zoom, rotation)
 	-- this will be the size we actually render
 	local size = page_size
@@ -242,7 +243,7 @@ function KoptInterface:renderPage(doc, pageno, rect, zoom, rotation, render_mode
 			return
 		end
 		-- only render required part
-		hash = "renderpg|"..doc.file.."|"..pageno.."|"..doc.configurable:hash('|').."|"..tostring(rect)
+		hash = "renderpg|"..doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..tostring(rect)
 		size = rect
 	end
 	
@@ -258,7 +259,7 @@ function KoptInterface:renderPage(doc, pageno, rect, zoom, rotation, render_mode
 	}
 
 	-- draw to blitbuffer
-	local kc_hash = "kctx|"..doc.file.."|"..pageno.."|"..doc.configurable:hash('|')
+	local kc_hash = "kctx|"..doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..tostring(self.cur_bbox)
 	local page = doc._document:openPage(pageno)
 	local cached = Cache:check(kc_hash)
 	if cached then