Add trimpot option to resistor symbol

src/symbol/default/common/icons.coffee

@@ -1,5 +1,8 @@
 Icon = require './icon'
 
+#
+# Diode
+#
 class DiodeIcon extends Icon
   constructor: (symbol, element) ->
     @width = 4
@@ -49,12 +52,12 @@ class DiodeIcon extends Icon
         len = f*3
         arrowWidth = 1
 
-        x = Math.max(@width, @height)/2
-        y = -x
-        x1 = x
-        y1 = y - d
-        x2 = x + d
-        y2 = y
+        xa = Math.max(@width, @height)/2
+        ya = -xa
+        x1 = xa
+        y1 = ya - d
+        x2 = xa + d
+        y2 = ya
         @symbol
           .line x1, y1, x1 + len, y1 - len
           .arrow x1 + len/2, y1 - len/2, x1 + len, y1 - len, arrowWidth
@@ -63,6 +66,32 @@ class DiodeIcon extends Icon
 
     @symbol.center 0, 0 # Restore default center point
 
+#
+# Resistor
+#
+class ResistorIcon extends Icon
+  constructor: (symbol, element) ->
+    @width = 10
+    @height = 4
+    super symbol, element
+    if @schematic.trimpot then @space = @height/2
+  draw: (x, y) ->
+    settings = @symbol.settings
+    @symbol
+      .lineWidth @lineWidth
+      .center x, y # Set center to (x, y)
+      .rectangle -@width/2, -@height/2, @width/2, @height/2, settings.fill
+    if @schematic.trimpot
+      d = 1
+      @symbol
+        .line -@height, @height,  @height, -@height
+        .line @height - d, -@height - d,  @height + d, -@height + d
+    @symbol.center 0, 0 # Restore default center point
+
+#
+# Export object
+#
 Icons = {}
 Icons.Diode = DiodeIcon
+Icons.Resistor = ResistorIcon
 module.exports = Icons

src/symbol/default/resistor.coffee

@@ -1,3 +1,5 @@
+Icons = require './common/icons'
+
 module.exports = (symbol, element) ->
   element.refDes = 'R'
   schematic = element.schematic
@@ -6,20 +8,22 @@ module.exports = (symbol, element) ->
   schematic.showPinNames ?= false
   schematic.showPinNumbers ?= false
 
-  width = 10
-  height = 4
+  icon = if styleIcons? then new styleIcons.Resistor(symbol, element) else new Icons.Resistor(symbol, element)
+  width = icon.width
+  height = icon.height
+  space = icon.space ? 0
   pinLength = settings.pinLength ? 2.5
   pinLength = (2*symbol.alignToGrid(width/2 + pinLength, 'ceil') - width) / 2
 
   symbol
     .attribute 'refDes',
       x: 0
-      y: -height/2 - settings.space.attribute
+      y: -height/2 - space - settings.space.attribute
       halign: 'center'
       valign: 'bottom'
     .attribute 'name',
       x: 0
-      y: height/2 + settings.space.attribute
+      y: height/2 + space + settings.space.attribute
       halign: 'center'
       valign: 'top'
     .pin
@@ -38,7 +42,9 @@ module.exports = (symbol, element) ->
       length: pinLength
       orientation: 'left'
       passive: true
-    .lineWidth settings.lineWidth.thick
-    .rectangle -width/2, -height/2, width/2, height/2, settings.fill
+
+  icon.draw 0, 0
+  #  .lineWidth settings.lineWidth.thick
+  #  .rectangle -width/2, -height/2, width/2, height/2, settings.fill
 
   [width, height]

src/symbol/gost/resistor.coffee

@@ -5,7 +5,7 @@ module.exports = (symbol, element) ->
   gap = 1.2
   dx = width / 8
   dy = height/2 - gap
-  if element.keywords?
+  if element.keywords? and (not element.schematic.trimpot)
     keywords = element.keywords.toLowerCase().replace(/\s+/g, '').split(',')
     if keywords.indexOf('1/10w') isnt -1
       space = width / 4