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gnuplot-old/term/js/gnuplot_common.js at master · gnuplot/gnuplot-old · GitHub
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gnuplot_common.js
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/*
* $Id: gnuplot_common.js,v 1.10 2012/05/03 20:35:22 sfeam Exp $
*/
// Shared routines for gnuplot's HTML5 canvas terminal driver.
var
gnuplot
=
{
}
;
gnuplot
.
common_version
=
"3 May 2012"
;
gnuplot
.
L
=
function
(
x
,
y
)
{
if
(
gnuplot
.
zoomed
)
{
var
zoom
=
gnuplot
.
zoomXY
(
x
/
10.0
,
y
/
10.0
)
;
ctx
.
lineTo
(
zoom
.
x
,
zoom
.
y
)
;
}
else
ctx
.
lineTo
(
x
/
10.0
,
y
/
10.0
)
;
}
gnuplot
.
M
=
function
(
x
,
y
)
{
if
(
gnuplot
.
zoomed
)
{
var
zoom
=
gnuplot
.
zoomXY
(
x
/
10.0
,
y
/
10.0
)
;
ctx
.
moveTo
(
zoom
.
x
,
zoom
.
y
)
;
}
else
ctx
.
moveTo
(
x
/
10.0
,
y
/
10.0
)
;
}
gnuplot
.
R
=
function
(
x
,
y
,
w
,
h
)
{
if
(
gnuplot
.
zoomed
)
{
var
dx
,
dy
,
dw
,
dh
;
var
zoom
=
gnuplot
.
zoomXY
(
x
/
10.0
,
y
/
10.0
)
;
if
(
zoom
.
x
>=
gnuplot
.
plot_xmax
)
return
;
if
(
zoom
.
y
>=
gnuplot
.
plot_ybot
)
return
;
dx
=
zoom
.
x
;
dy
=
zoom
.
y
;
zoom
=
gnuplot
.
zoomXY
(
(
x
+
w
)
/
10.
,
(
y
+
h
)
/
10.
)
;
if
(
zoom
.
xraw
<=
gnuplot
.
plot_xmin
)
return
;
if
(
zoom
.
yraw
<=
gnuplot
.
plot_ytop
)
return
;
dw
=
zoom
.
x
-
dx
;
dh
=
zoom
.
y
-
dy
;
ctx
.
fillRect
(
dx
,
dy
,
dw
,
dh
)
;
}
else
ctx
.
fillRect
(
x
/
10.0
,
y
/
10.0
,
w
/
10.0
,
h
/
10.0
)
;
}
gnuplot
.
T
=
function
(
x
,
y
,
fontsize
,
justify
,
string
)
{
var
xx
=
x
/
10.0
;
var
yy
=
y
/
10.0
;
if
(
gnuplot
.
zoomed
)
{
var
zoom
=
gnuplot
.
zoomXY
(
xx
,
yy
)
;
if
(
zoom
.
clip
)
return
;
xx
=
zoom
.
x
;
yy
=
zoom
.
y
;
if
(
gnuplot
.
plot_xmin
<
xx
&&
xx
<
gnuplot
.
plot_xmax
&&
gnuplot
.
plot_ybot
>
yy
&&
yy
>
gnuplot
.
plot_ytop
)
if
(
(
typeof
(
gnuplot
.
zoom_text
)
!=
"undefined"
)
&&
(
gnuplot
.
zoom_text
==
true
)
)
fontsize
=
Math
.
sqrt
(
gnuplot
.
zoomW
(
fontsize
)
*
gnuplot
.
zoomH
(
fontsize
)
)
;
}
if
(
justify
==
""
)
ctx
.
drawText
(
"sans"
,
fontsize
,
xx
,
yy
,
string
)
;
else
if
(
justify
==
"Right"
)
ctx
.
drawTextRight
(
"sans"
,
fontsize
,
xx
,
yy
,
string
)
;
else
if
(
justify
==
"Center"
)
ctx
.
drawTextCenter
(
"sans"
,
fontsize
,
xx
,
yy
,
string
)
;
}
gnuplot
.
TR
=
function
(
x
,
y
,
angle
,
fontsize
,
justify
,
string
)
{
var
xx
=
x
/
10.0
;
var
yy
=
y
/
10.0
;
if
(
gnuplot
.
zoomed
)
{
var
zoom
=
gnuplot
.
zoomXY
(
xx
,
yy
)
;
if
(
zoom
.
clip
)
return
;
xx
=
zoom
.
x
;
yy
=
zoom
.
y
;
if
(
gnuplot
.
plot_xmin
<
xx
&&
xx
<
gnuplot
.
plot_xmax
&&
gnuplot
.
plot_ybot
>
yy
&&
yy
>
gnuplot
.
plot_ytop
)
if
(
(
typeof
(
gnuplot
.
zoom_text
)
!=
"undefined"
)
&&
(
gnuplot
.
zoom_text
==
true
)
)
fontsize
=
Math
.
sqrt
(
gnuplot
.
zoomW
(
fontsize
)
*
gnuplot
.
zoomH
(
fontsize
)
)
;
}
ctx
.
save
(
)
;
ctx
.
translate
(
xx
,
yy
)
;
ctx
.
rotate
(
angle
*
Math
.
PI
/
180
)
;
if
(
justify
==
""
)
ctx
.
drawText
(
"sans"
,
fontsize
,
0
,
0
,
string
)
;
else
if
(
justify
==
"Right"
)
ctx
.
drawTextRight
(
"sans"
,
fontsize
,
0
,
0
,
string
)
;
else
if
(
justify
==
"Center"
)
ctx
.
drawTextCenter
(
"sans"
,
fontsize
,
0
,
0
,
string
)
;
ctx
.
restore
(
)
;
}
gnuplot
.
bp
=
function
(
x
,
y
)
// begin polygon
{
ctx
.
beginPath
(
)
;
gnuplot
.
M
(
x
,
y
)
;
}
gnuplot
.
cfp
=
function
(
)
// close and fill polygon
{
ctx
.
closePath
(
)
;
ctx
.
fill
(
)
;
}
gnuplot
.
cfsp
=
function
(
)
// close and fill polygon with stroke color
{
ctx
.
closePath
(
)
;
ctx
.
fillStyle
=
ctx
.
strokeStyle
;
ctx
.
stroke
(
)
;
ctx
.
fill
(
)
;
}
gnuplot
.
Dot
=
function
(
x
,
y
)
{
var
xx
=
x
;
var
yy
=
y
;
if
(
gnuplot
.
zoomed
)
{
zoom
=
gnuplot
.
zoomXY
(
xx
,
yy
)
;
xx
=
zoom
.
x
;
yy
=
zoom
.
y
;
if
(
zoom
.
clip
)
return
;
}
ctx
.
strokeRect
(
xx
,
yy
,
0.5
,
0.5
)
;
}
gnuplot
.
Pt
=
function
(
N
,
x
,
y
,
w
)
{
var
xx
=
x
;
var
yy
=
y
;
if
(
gnuplot
.
zoomed
)
{
var
zoom
=
gnuplot
.
zoomXY
(
xx
,
yy
)
;
xx
=
zoom
.
x
;
yy
=
zoom
.
y
;
if
(
zoom
.
clip
)
return
;
}
if
(
w
==
0
)
return
;
switch
(
N
)
{
case
0
:
ctx
.
beginPath
(
)
;
ctx
.
moveTo
(
xx
-
w
,
yy
)
;
ctx
.
lineTo
(
xx
+
w
,
yy
)
;
ctx
.
moveTo
(
xx
,
yy
-
w
)
;
ctx
.
lineTo
(
xx
,
yy
+
w
)
;
ctx
.
stroke
(
)
;
break
;
case
1
:
var
ww
=
w
*
3
/
4
;
ctx
.
beginPath
(
)
;
ctx
.
moveTo
(
xx
-
ww
,
yy
-
ww
)
;
ctx
.
lineTo
(
xx
+
ww
,
yy
+
ww
)
;
ctx
.
moveTo
(
xx
+
ww
,
yy
-
ww
)
;
ctx
.
lineTo
(
xx
-
ww
,
yy
+
ww
)
;
ctx
.
stroke
(
)
;
break
;
case
2
:
gnuplot
.
Pt
(
0
,
x
,
y
,
w
)
;
gnuplot
.
Pt
(
1
,
x
,
y
,
w
)
;
break
;
case
3
:
ctx
.
strokeRect
(
xx
-
w
/
2
,
yy
-
w
/
2
,
w
,
w
)
;
break
;
case
4
:
ctx
.
save
(
)
;
ctx
.
strokeRect
(
xx
-
w
/
2
,
yy
-
w
/
2
,
w
,
w
)
;
ctx
.
restore
(
)
;
ctx
.
fillRect
(
xx
-
w
/
2
,
yy
-
w
/
2
,
w
,
w
)
;
break
;
case
5
:
ctx
.
beginPath
(
)
;
ctx
.
arc
(
xx
,
yy
,
w
/
2
,
0
,
Math
.
PI
*
2
,
true
)
;
ctx
.
stroke
(
)
;
break
;
default
:
case
6
:
ctx
.
beginPath
(
)
;
ctx
.
arc
(
xx
,
yy
,
w
/
2
,
0
,
Math
.
PI
*
2
,
true
)
;
ctx
.
fill
(
)
;
break
;
case
7
:
ctx
.
beginPath
(
)
;
ctx
.
moveTo
(
xx
,
yy
-
w
)
;
ctx
.
lineTo
(
xx
-
w
,
yy
+
w
/
2
)
;
ctx
.
lineTo
(
xx
+
w
,
yy
+
w
/
2
)
;
ctx
.
closePath
(
)
;
ctx
.
stroke
(
)
;
break
;
case
8
:
ctx
.
beginPath
(
)
;
ctx
.
moveTo
(
xx
,
yy
-
w
)
;
ctx
.
lineTo
(
xx
-
w
,
yy
+
w
/
2
)
;
ctx
.
lineTo
(
xx
+
w
,
yy
+
w
/
2
)
;
ctx
.
closePath
(
)
;
ctx
.
fill
(
)
;
break
;
}
}
// Zoomable image
gnuplot
.
ZI
=
function
(
image
,
m
,
n
,
x1
,
y1
,
x2
,
y2
)
{
if
(
gnuplot
.
zoomed
)
{
var
sx
,
sy
,
sw
,
sh
,
dx
,
dy
,
dw
,
dh
;
var
zoom
=
gnuplot
.
zoomXY
(
x1
/
10.0
,
y1
/
10.0
)
;
if
(
zoom
.
x
>=
gnuplot
.
plot_xmax
)
return
;
if
(
zoom
.
y
>=
gnuplot
.
plot_ybot
)
return
;
x1raw
=
zoom
.
xraw
;
y1raw
=
zoom
.
yraw
;
dx
=
zoom
.
x
;
dy
=
zoom
.
y
;
zoom
=
gnuplot
.
zoomXY
(
(
x2
)
/
10.
,
(
y2
)
/
10.
)
;
if
(
zoom
.
xraw
<=
gnuplot
.
plot_xmin
)
return
;
if
(
zoom
.
yraw
<=
gnuplot
.
plot_ytop
)
return
;
var
x2raw
=
zoom
.
xraw
;
var
y2raw
=
zoom
.
yraw
;
dw
=
zoom
.
x
-
dx
;
dh
=
zoom
.
y
-
dy
;
// FIXME: This is sometimes flaky. Needs integer truncation?
sx
=
0
;
sy
=
0
;
sw
=
m
;
sh
=
n
;
if
(
x1raw
<
dx
)
sx
=
m
*
(
dx
-
x1raw
)
/
(
x2raw
-
x1raw
)
;
if
(
y1raw
<
dy
)
sy
=
n
*
(
dy
-
y1raw
)
/
(
y2raw
-
y1raw
)
;
if
(
x2raw
>
zoom
.
x
)
sw
=
m
*
(
1.
-
(
(
x2raw
-
zoom
.
x
)
/
(
x2raw
-
x1raw
)
)
)
;
if
(
y2raw
>
zoom
.
y
)
sh
=
n
*
(
1.
-
(
(
y2raw
-
zoom
.
y
)
/
(
y2raw
-
y1raw
)
)
)
;
sw
=
sw
-
sx
;
sh
=
sh
-
sy
;
ctx
.
drawImage
(
image
,
sx
,
sy
,
sw
,
sh
,
dx
,
dy
,
dw
,
dh
)
;
}
else
ctx
.
drawImage
(
image
,
x1
/
10.0
,
y1
/
10.0
,
(
x2
-
x1
)
/
10.0
,
(
y2
-
y1
)
/
10.0
)
;
}
// These methods are place holders that are loaded by gnuplot_dashedlines.js
gnuplot
.
dashtype
=
function
(
dt
)
{
}
;
gnuplot
.
dashstart
=
function
(
x
,
y
)
{
gnuplot
.
M
(
x
,
y
)
;
}
;
gnuplot
.
dashstep
=
function
(
x
,
y
)
{
gnuplot
.
L
(
x
,
y
)
;
}
;
gnuplot
.
pattern
=
[
]
;
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