Merge branch 'cursor' into djvu-highlight

blitbuffer.c

@@ -366,6 +366,63 @@ static int paintRect(lua_State *L) {
 	return 0;
 }
 
+static int invertRect(lua_State *L) {
+	BlitBuffer *dst = (BlitBuffer*) luaL_checkudata(L, 1, "blitbuffer");
+	int x = luaL_checkint(L, 2);
+	int y = luaL_checkint(L, 3);
+	int w = luaL_checkint(L, 4);
+	int h = luaL_checkint(L, 5);
+	uint8_t *dstptr;
+
+	int cy, cx;
+	if(w <= 0 || h <= 0 || x >= dst->w || y >= dst->h) {
+		return 0;
+	}
+	if(x + w > dst->w) {
+		w = dst->w - x;
+	}
+	if(y + h > dst->h) {
+		h = dst->h - y;
+	}
+
+	if(x & 1) {
+		/* This will invert the leftmost column
+		 * in the case when x is odd. After this,
+		 * x will become even. */
+		dstptr = (uint8_t*)(dst->data + 
+				y * dst->pitch + 
+				x / 2);
+		for(cy = 0; cy < h; cy++) {
+			*dstptr ^= 0x0F;
+			dstptr += dst->pitch;
+		}
+		x++;
+		w--;
+	}
+	dstptr = (uint8_t*)(dst->data + 
+			y * dst->pitch + 
+			x / 2);
+	for(cy = 0; cy < h; cy++) {
+		for(cx = 0; cx < w/2; cx++) {
+			*(dstptr+cx) ^=  0xFF;
+		}
+		dstptr += dst->pitch;
+	}
+	if(w & 1) {
+		/* This will invert the rightmost column 
+		 * in the case when (w & 1) && !(x & 1) or
+		 * !(w & 1) && (x & 1). */
+		dstptr = (uint8_t*)(dst->data + 
+				y * dst->pitch + 
+				(x + w) / 2);
+		for(cy = 0; cy < h; cy++) {
+			*dstptr ^= 0xF0;
+			dstptr += dst->pitch;
+		}
+	}
+	return 0;
+}
+
 static const struct luaL_reg blitbuffer_func[] = {
 	{"new", newBlitBuffer},
 	{NULL, NULL}
@@ -378,6 +435,7 @@ static const struct luaL_reg blitbuffer_meth[] = {
 	{"addblitFrom", addblitToBuffer},
 	{"blitFullFrom", blitFullToBuffer},
 	{"paintRect", paintRect},
+	{"invertRect", invertRect},
 	{"free", freeBlitBuffer},
 	{"__gc", freeBlitBuffer},
 	{NULL, NULL}

graphics.lua

@@ -6,6 +6,7 @@ blitbuffer.paintBorder = function (bb, x, y, w, h, bw, c)
 	bb:paintRect(x+w-bw, y+bw, bw, h - 2*bw, c)
 end
 
+
 --[[
 Draw a progress bar according to following args:
 
@@ -27,3 +28,83 @@ blitbuffer.progressBar = function (bb, x, y, w, h,
 	fb.bb:paintRect(x+load_m_w, y+load_m_h, 
 					(w-2*load_m_w)*load_percent, (h-2*load_m_h), c)
 end
+
+
+
+------------------------------------------------
+-- Start of Cursor class
+------------------------------------------------
+
+Cursor = {
+	x_pos = 0,
+	y_pos = 0,
+	--color = 15,
+	h = 10,
+	w = nil,
+	line_w = nil,
+}
+
+function Cursor:new(o)
+	o = o or {}
+	o.x_pos = o.x_pos or self.x_pos 
+	o.y_pos = o.y_pos or self.y_pos 
+	o.h = o.h or self.h
+
+	o.w = o.h / 3
+	o.line_w = math.floor(o.h / 10)
+
+	setmetatable(o, self)
+	self.__index = self
+	return o
+end
+
+function Cursor:_draw(x, y)
+	local body_h = self.h - self.line_w
+	-- paint upper horizontal line
+	fb.bb:invertRect(x, y, self.w, self.line_w/2)
+	-- paint middle vertical line
+	fb.bb:invertRect(x+(self.w/2)-(self.line_w/2), y+self.line_w/2, 
+							self.line_w, body_h)
+	-- paint lower horizontal line
+	fb.bb:invertRect(x, y+body_h+self.line_w/2, self.w, self.line_w/2)
+end
+
+function Cursor:draw()
+	self:_draw(self.x_pos, self.y_pos)
+end
+
+function Cursor:clear()
+	self:_draw(self.x_pos, self.y_pos)
+end
+
+function Cursor:move(x_off, y_off)
+	self.x_pos = self.x_pos + x_off
+	self.y_pos = self.y_pos + y_off
+end
+
+function Cursor:moveHorizontal(x_off)
+	self.x_pos = self.x_pos + x_off
+end
+
+function Cursor:moveVertical(x_off)
+	self.y_pos = self.y_pos + y_off
+end
+
+function Cursor:moveAndDraw(x_off, y_off)
+	self:clear()
+	self:move(x_off, y_off)
+	self:draw()
+end
+
+function Cursor:moveHorizontalAndDraw(x_off)
+	self:clear()
+	self:move(x_off, 0)
+	self:draw()
+end
+
+function Cursor:moveVerticalAndDraw(y_off)
+	self:clear()
+	self:move(0, y_off)
+	self:draw()
+end
+

inputbox.lua

@@ -4,6 +4,8 @@ require "graphics"
 
 InputBox = {
 	-- Class vars:
+	h = 100,
+	input_slot_w = nil,
 	input_start_x = 145,
 	input_start_y = nil,
 	input_cur_x = nil, -- points to the start of next input pos
@@ -15,44 +17,75 @@ InputBox = {
 	shiftmode = false,
 	altmode = false,
 
+	cursor = nil,
+
 	-- font for displaying input content
+	-- we have to use mono here for better distance controlling
 	face = freetype.newBuiltinFace("mono", 25),
 	fhash = "m25",
 	fheight = 25,
-	fwidth = 16,
+	fwidth = 15,
 }
 
-function InputBox:setDefaultInput(text)
-	self.input_string = ""
-	self:addString(text)
-	--self.input_cur_x = self.input_start_x + (string.len(text) * self.fwidth)
-	--self.input_string = text
-end
-
-function InputBox:addString(str)
-	for i = 1, #str do
-		self:addChar(str:sub(i,i))
-	end
+function InputBox:refreshText()
+	-- clear previous painted text
+	fb.bb:paintRect(140, self.input_start_y-19, 
+					self.input_slot_w, self.fheight, self.input_bg)
+	-- paint new text
+	renderUtf8Text(fb.bb, self.input_start_x, self.input_start_y,
+					self.face, self.fhash,
+					self.input_string, 0)
 end
 
 function InputBox:addChar(char)
-	renderUtf8Text(fb.bb, self.input_cur_x, self.input_start_y, self.face, self.fhash,
-								char, true)
-	fb:refresh(1, self.input_cur_x, self.input_start_y-19, self.fwidth, self.fheight)
+	self.cursor:clear()
+
+	-- draw new text
+	local cur_index = (self.cursor.x_pos + 3 - self.input_start_x)
+						/ self.fwidth
+	self.input_string = self.input_string:sub(0,cur_index)..char..
+						self.input_string:sub(cur_index+1)
+	self:refreshText()
 	self.input_cur_x = self.input_cur_x + self.fwidth
-	self.input_string = self.input_string .. char
+	-- draw new cursor
+	self.cursor:moveHorizontal(self.fwidth)
+	self.cursor:draw()
+
+	fb:refresh(1, self.input_start_x-5, self.input_start_y-25, 
+				self.input_slot_w, self.h-25)
 end
 
 function InputBox:delChar()
 	if self.input_start_x == self.input_cur_x then
 		return
 	end
+
+	self.cursor:clear()
+
+	-- draw new text
+	local cur_index = (self.cursor.x_pos + 3 - self.input_start_x)
+						/ self.fwidth
+	self.input_string = self.input_string:sub(0,cur_index-1)..
+						self.input_string:sub(cur_index+1, -1)
+	self:refreshText()
 	self.input_cur_x = self.input_cur_x - self.fwidth
-	--fill last character with blank rectangle
-	fb.bb:paintRect(self.input_cur_x, self.input_start_y-19, 
-									self.fwidth, self.fheight, self.input_bg)
-	fb:refresh(1, self.input_cur_x, self.input_start_y-19, self.fwidth, self.fheight)
-	self.input_string = self.input_string:sub(0,-2)
+	-- draw new cursor
+	self.cursor:moveHorizontal(-self.fwidth)
+	self.cursor:draw()
+
+	fb:refresh(1, self.input_start_x-5, self.input_start_y-25, 
+				self.input_slot_w, self.h-25)
+end
+
+function InputBox:clearText()
+	self.cursor:clear()
+	self.input_string = ""
+	self:refreshText()
+	self.cursor.x_pos = self.input_start_x - 3
+	self.cursor:draw()
+
+	fb:refresh(1, self.input_start_x-5, self.input_start_y-25, 
+				self.input_slot_w, self.h-25)
 end
 
 function InputBox:drawBox(ypos, w, h, title)
@@ -66,35 +99,40 @@ function InputBox:drawBox(ypos, w, h, title)
 end
 
 
---[[
-	|| d_text default to nil (used to set default text in input slot)
---]]
+----------------------------------------------------------------------
+-- InputBox:input()
+--
+-- @title: input prompt for the box
+-- @d_text: default to nil (used to set default text in input slot)
+----------------------------------------------------------------------
 function InputBox:input(ypos, height, title, d_text)
-	local pagedirty = true
 	-- do some initilization
+	self.h = height
 	self.input_start_y = ypos + 35
 	self.input_cur_x = self.input_start_x
+	self.input_slot_w = fb.bb:getWidth() - 170
 
-	if d_text then -- if specified default text, draw it
-		w = fb.bb:getWidth() - 40
-		h = height - 45
-		self:drawBox(ypos, w, h, title)
-		self:setDefaultInput(d_text)
-		fb:refresh(1, 20, ypos, w, h)
-		pagedirty = false
-	else -- otherwise, leave the draw task to the main loop
-		self.input_string = ""
+	self.cursor = Cursor:new {
+		x_pos = self.input_start_x - 3,
+		y_pos = ypos + 13,
+		h = 30,
+	}
+
+
+	-- draw box and content
+	w = fb.bb:getWidth() - 40
+	h = height - 45
+	self:drawBox(ypos, w, h, title)
+	if d_text then
+		self.input_string = d_text
+		self.input_cur_x = self.input_cur_x + (self.fwidth * d_text:len())
+		self.cursor.x_pos = self.cursor.x_pos + (self.fwidth * d_text:len())
+		self:refreshText()
 	end
+	self.cursor:draw()
+	fb:refresh(1, 20, ypos, w, h)
 
 	while true do
-		if pagedirty then
-			w = fb.bb:getWidth() - 40
-			h = height - 45
-			self:drawBox(ypos, w, h, title)
-			fb:refresh(1, 20, ypos, w, h)
-			pagedirty = false
-		end
-
 		local ev = input.waitForEvent()
 		ev.code = adjustKeyEvents(ev)
 		if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
@@ -177,14 +215,30 @@ function InputBox:input(ypos, height, title, d_text)
 				self:addChar(" ")
 			elseif ev.code == KEY_PGFWD then
 			elseif ev.code == KEY_PGBCK then
+			elseif ev.code == KEY_FW_LEFT then
+				if (self.cursor.x_pos + 3) > self.input_start_x then
+					self.cursor:moveHorizontalAndDraw(-self.fwidth)
+					fb:refresh(1, self.input_start_x-5, ypos,
+								self.input_slot_w, h)
+				end
+			elseif ev.code == KEY_FW_RIGHT then
+				if (self.cursor.x_pos + 3) < self.input_cur_x then
+					self.cursor:moveHorizontalAndDraw(self.fwidth)
+					fb:refresh(1,self.input_start_x-5, ypos,
+								self.input_slot_w, h)
+				end
 			elseif ev.code == KEY_ENTER or ev.code == KEY_FW_PRESS then
 				if self.input_string == "" then
 					self.input_string = nil
 				end
 				break
 			elseif ev.code == KEY_DEL then
-				self:delChar()
-			elseif ev.code == KEY_BACK then
+				if Keys.shiftmode then
+					self:clearText()
+				else
+					self:delChar()
+				end
+			elseif ev.code == KEY_BACK or ev.code == KEY_HOME then
 				self.input_string = nil
 				break
 			end
@@ -195,5 +249,7 @@ function InputBox:input(ypos, height, title, d_text)
 		end -- if
 	end -- while
 
-	return self.input_string
+	local return_str = self.input_string
+	self.input_string = ""
+	return return_str
 end