From 85fedef7a4968bd6212340fd1ee9b05cd6a0b35b Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Sat, 18 Feb 2012 20:35:03 +0800
Subject: [PATCH] add: filesearcher

---
 filesearcher.lua | 179 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)
 create mode 100644 filesearcher.lua

diff --git a/filesearcher.lua b/filesearcher.lua
new file mode 100644
index 000000000..3f819e941
--- /dev/null
+++ b/filesearcher.lua
@@ -0,0 +1,179 @@
+require "rendertext"
+require "keys"
+require "graphics"
+require "fontchooser"
+require "inputbox"
+
+FileSearcher = {
+	-- Class vars:
+	
+	-- font for displaying file/dir names
+	face = freetype.newBuiltinFace("sans", 25),
+	fhash = "s25",
+	-- font for paging display
+	sface = freetype.newBuiltinFace("sans", 16),
+	sfhash = "s16",
+	-- spacing between lines
+	spacing = 40,
+
+	-- state buffer
+	dirs = nil,
+	files = nil,
+	items = 0,
+	path = "",
+	page = 1,
+	current = 1,
+	oldcurrent = 0,
+}
+
+function FileSearcher:readdir()
+	self.dirs = {}
+	self.files = {}
+	for f in lfs.dir(self.path) do
+		if lfs.attributes(self.path.."/"..f, "mode") == "directory" and f ~= "." and not string.match(f, "^%.[^.]") then
+			table.insert(self.dirs, f)
+		elseif string.match(f, ".+%.[pP][dD][fF]$") then
+			table.insert(self.files, f)
+		end
+	end
+	table.sort(self.dirs)
+	table.sort(self.files)
+end
+
+function FileSearcher:setPath(newPath)
+	self.path = newPath
+	self:readdir()
+	self.items = #self.dirs + #self.files
+	if self.items == 0 then
+		return nil
+	end
+	self.page = 1
+	self.current = 1
+	return true
+end
+
+
+function FileSearcher:choose(ypos, height)
+	local perpage = math.floor(height / self.spacing) - 1
+	local pagedirty = true
+	local markerdirty = false
+
+	local prevItem = function ()
+		if self.current == 1 then
+			if self.page > 1 then
+				self.current = perpage
+				self.page = self.page - 1
+				pagedirty = true
+			end
+		else
+			self.current = self.current - 1
+			markerdirty = true
+		end
+	end
+
+	local nextItem = function ()
+		if self.current == perpage then
+			if self.page < (self.items / perpage) then
+				self.current = 1
+				self.page = self.page + 1
+				pagedirty = true
+			end
+		else
+			if self.page ~= math.floor(self.items / perpage) + 1
+				or self.current + (self.page-1)*perpage < self.items then
+				self.current = self.current + 1
+				markerdirty = true
+			end
+		end
+	end
+
+	while true do
+		if pagedirty then
+			fb.bb:paintRect(0, ypos, fb.bb:getWidth(), height, 0)
+			local c
+			for c = 1, perpage do
+				local i = (self.page - 1) * perpage + c
+				if i <= #self.dirs then
+					-- resembles display in midnight commander: adds "/" prefix for directories
+					renderUtf8Text(fb.bb, 39, ypos + self.spacing*c, self.face, self.fhash, "/", true)
+					renderUtf8Text(fb.bb, 50, ypos + self.spacing*c, self.face, self.fhash, self.dirs[i], true)
+				elseif i <= self.items then
+					renderUtf8Text(fb.bb, 50, ypos + self.spacing*c, self.face, self.fhash, self.files[i-#self.dirs], true)
+				end
+			end
+			renderUtf8Text(fb.bb, 39, ypos + self.spacing * perpage + 32, self.sface, self.sfhash,
+				"Page "..self.page.." of "..(math.floor(self.items / perpage)+1), true)
+			markerdirty = true
+		end
+		if markerdirty then
+			if not pagedirty then
+				if self.oldcurrent > 0 then
+					fb.bb:paintRect(30, ypos + self.spacing*self.oldcurrent + 10, fb.bb:getWidth() - 60, 3, 0)
+						fb:refresh(1, 30, ypos + self.spacing*self.oldcurrent + 10, fb.bb:getWidth() - 60, 3)
+				end
+			end
+			fb.bb:paintRect(30, ypos + self.spacing*self.current + 10, fb.bb:getWidth() - 60, 3, 15)
+			if not pagedirty then
+				fb:refresh(1, 30, ypos + self.spacing*self.current + 10, fb.bb:getWidth() - 60, 3)
+			end
+			self.oldcurrent = self.current
+			markerdirty = false
+		end
+		if pagedirty then
+			fb:refresh(0, 0, ypos, fb.bb:getWidth(), height)
+			pagedirty = false
+		end
+		local ev = input.waitForEvent()
+		if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
+			ev.code = adjustFWKey(ev.code)
+			if ev.code == KEY_FW_UP then
+				prevItem()
+			elseif ev.code == KEY_FW_DOWN then
+				nextItem()
+			elseif ev.code == KEY_F then
+				FontChooser:init()
+				newfont = FontChooser:choose(0, height)
+				if newfont ~= nil then
+					self.face = freetype.newBuiltinFace(newfont, 25)
+					clearglyphcache()
+				end
+				pagedirty = true
+			elseif ev.code == KEY_S then
+				InputBox:input()
+			elseif ev.code == KEY_PGFWD then
+				if self.page < (self.items / perpage) then
+					if self.current + self.page*perpage > self.items then
+						self.current = self.items - self.page*perpage
+					end
+					self.page = self.page + 1
+					pagedirty = true
+				else
+					self.current = self.items - (self.page-1)*perpage
+					markerdirty = true
+				end
+			elseif ev.code == KEY_PGBCK then
+				if self.page > 1 then
+					self.page = self.page - 1
+					pagedirty = true
+				else
+					self.current = 1
+					markerdirty = true
+				end
+			elseif ev.code == KEY_ENTER or ev.code == KEY_FW_PRESS then
+				local newdir = self.dirs[perpage*(self.page-1)+self.current]
+				if newdir == ".." then
+					local path = string.gsub(self.path, "(.*)/[^/]+/?$", "%1")
+					self:setPath(path)
+				elseif newdir then
+					local path = self.path.."/"..newdir
+					self:setPath(path)
+				else
+					return self.path.."/"..self.files[perpage*(self.page-1)+self.current - #self.dirs]
+				end
+				pagedirty = true
+			elseif ev.code == KEY_BACK then
+				return nil
+			end
+		end
+	end
+end