DRAGGING: { txt: 'dragging' }
EDITING: { txt: 'editing' }
}
-TYPE_WIDGET = 1
-TYPE_CONTROL = 2
# json (compiled to javascript and minified) is ~8% smaller than the resulting xml
json_to_svg = (json) ->
el.setAttribute k, v
return el
+resizer_nw = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width - dxy.x, h: widget.height - dxy.y
+ widget.move x: widget.x + dxy.x, y: widget.y + dxy.y
+resizer_n = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width, h: widget.height - dxy.y
+ widget.move x: widget.x, y: widget.y + dxy.y
+resizer_ne = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width + dxy.x, h: widget.height - dxy.y
+ widget.move x: widget.x, y: widget.y + dxy.y
+resizer_e = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width + dxy.x, h: widget.height
+resizer_se = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width + dxy.x, h: widget.height + dxy.y
+resizer_s = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width, h: widget.height + dxy.y
+resizer_sw = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width - dxy.x, h: widget.height + dxy.y
+ widget.move x: widget.x + dxy.x, y: widget.y
+resizer_w = (widget) ->
+ return (dxy) ->
+ widget.resize w: widget.width - dxy.x, h: widget.height
+ widget.move x: widget.x + dxy.x, y: widget.y
+resizers = [
+ resizer_nw
+ resizer_n
+ resizer_ne
+ resizer_e
+ resizer_se
+ resizer_s
+ resizer_sw
+ resizer_w
+]
+resizer_shapes = [
+ -> return "M#{@x - 5} #{@y - 5}h6l-2 2 4 4 2 -2v6h-6l2-2-4-4-2 2z"
+ -> return "M #{@x},#{@y - 7} l 4,4 -2.5,0 0,5 2.5,0 -4,4 -4,-4 2.5,0 0,-5 -2.5,0 z"
+ -> return "M#{@x + 5} #{@y - 5}v6l-2-2-4 4 2 2h-6v-6l2 2 4-4-2-2z"
+ -> return "M #{@x - 7},#{@y} l 4,-4 0,2.5 5,0 0,-2.5 4,4 -4,4 0,-2.5 -5,0 0,2.5 z"
+]
+shape_node_move = -> "M#{@x} #{@y - 9}l-2.5 4.5h2v2.404a2.156 2.156 0 0 0-1.596 1.596h-2.404v-2l-4.5 2.5 4.5 2.5v-2h2.404a2.156 2.156 0 0 0 1.596 1.596v2.404h-2l2.5 4.5 2.5-4.5h-2v-2.404a2.156 2.156 0 0 0 1.596-1.596h2.404v2l4.5-2.5-4.5-2.5v2h-2.404a2.156 2.156 0 0 0-1.596-1.596v-2.404h2l-2.5-4.5z"
+
next_widget_id = 0
# public vars: x, y, width, height, el
class Visible
if @hover
css_class += " hover"
@el.setAttribute 'class', css_class
- set_hover: (tf) ->
- if tf != @hover
- @hover = tf
+ set_hover: (bool) ->
+ if bool != @hover
+ @hover = bool
@update_class()
move: (xy) -> # just move
@x = xy.x
class Control extends Visible
constructor: (args) ->
super args
- @type = TYPE_CONTROL
@on_drag = args.drag
@on_destruct = args.done ? null
destruct: ->
dx = xy.x - @x
dy = xy.y - @y
return dx * dx + dy * dy
-
-class ControlPoint extends Control
+class ControlPath extends Control
constructor: (args) ->
super args
@css_class = 'control_point'
- @el = json_to_svg circle:
- cx: @x + 1
- cy: @y + 1
- r: 6
+ @make_path = args.shape
+ @el = json_to_svg path:
+ d: @make_path()
class: 'control_point normal'
@svg.appendChild @el
destruct: ->
@svg.removeChild @el
move: (args) ->
super args
- @el.setAttribute 'cx', @x
- @el.setAttribute 'cy', @y
+ @el.setAttribute 'd', @make_path()
class Widget extends Visible
#sub-classes are expected to implement all of these:
constructor: (args) ->
super args
@controls = []
- @type = TYPE_WIDGET
destruct: ->
@kill_controls()
clone: ->
make_controls: -> # create controls, return them
return []
kill_controls: ->
- console.log 'kill_controls'
for c in @controls
c.destruct()
@controls = []
@svg.removeChild @el
clone: ->
return new RectWidget @
+ as_array: ->
+ return [@x, @y, @width, @height]
+ from_array: (args, a) ->
+ args.x = a[0]
+ args.y = a[1]
+ args.width = a[2]
+ args.height = a[3]
+ return new RectWidget args
set_state: (state) ->
super state
@update_class()
super args
@el.setAttribute 'x', @x + 1
@el.setAttribute 'y', @y + 1
+ @reposition_controls()
proximity: (xy) -> # return the square of the distance to your visible bits
x = xy.x
y = xy.y
new_prox *= new_prox
if new_prox < prox
prox = new_prox
- if in_x and in_y and prox > PROX_MAX
- prox = PROX_MAX - 1
+ # "hit" anything inside
+ #if in_x and in_y and prox > PROX_MAX
+ # prox = PROX_MAX - 1
return prox
resize: (wh) ->
+ dw = wh.w - @width
+ dh = wh.h - @height
@width = wh.w
- @el.setAttribute 'width', @width
+ @el.setAttribute 'width', @width - 2
@height = wh.h
- @el.setAttribute 'height', @height
+ @el.setAttribute 'height', @height - 2
+ @reposition_controls()
+ reposition_controls: ->
if @controls.length > 1
- @controls[1].move x: @x + @width, y: @y + @height
+ positions = @control_positions()
+ for i in [0...positions.length]
+ @controls[i].move x: positions[i].x, y: positions[i].y
+ control_positions: ->
+ gap = 7
+ mgap = 9
+ w2p = Math.floor(@width / 2) + 0.5
+ h2p = Math.floor(@height / 2) + 0.5
+ return [
+ { x: @x - gap, y: @y - gap }
+ { x: @x + w2p, y: @y - mgap }
+ { x: @x + @width + gap, y: @y - gap }
+ { x: @x + @width + mgap, y: @y + h2p }
+ { x: @x + @width + gap, y: @y + @height + gap }
+ { x: @x + w2p, y: @y + @height + mgap }
+ { x: @x - gap, y: @y + @height + gap }
+ { x: @x - mgap, y: @y + h2p }
+ ]
make_controls: (args) -> # create controls, return them
- console.log 'make_controls'
if @controls.length > 0
- console.log "warning: re-adding controls"
+ if console?.log?
+ console.log "warning: re-adding controls"
@kill_controls()
- w = @
- @controls = [
- new ControlPoint svg: @svg, x: @x, y: @y, done: args.done, drag: (dxy) ->
- w.resize w: w.width - dxy.x, h: w.height - dxy.y
- w.move x: w.x + dxy.x, y: w.y + dxy.y
- new ControlPoint svg: @svg, x: @x + @width, y: @y + @height, done: args.done, drag: (dxy) ->
- w.resize w: w.width + dxy.x, h: w.height + dxy.y
- ]
+ positions = @control_positions()
+ for i in [0...positions.length]
+ @controls.push new ControlPath {
+ svg: @svg
+ x: positions[i].x
+ y: positions[i].y
+ done: args.done
+ drag: resizers[i] @
+ shape: resizer_shapes[i % resizer_shapes.length]
+ }
+ return @controls
+
+class PolylineWidget extends Widget
+ constructor: (args) ->
+ super args
+ @css_class = 'polyline'
+ @nodes = []
+ for n in args.nodes
+ @nodes.push x: n.x, y: n.y
+ @el = json_to_svg path:
+ d: @my_path_d()
+ class: 'polyline normal'
+ @svg.appendChild @el
+ destruct: ->
+ super()
+ if @el?
+ @svg.removeChild @el
+ as_array: ->
+ ret = []
+ for n in @nodes
+ ret.push @x + n.x
+ ret.push @y + n.y
+ return ret
+ from_array: (args, a) ->
+ args.x = a[0]
+ args.y = a[1]
+ args.nodes = []
+ while a.length
+ xy = {}
+ xy.x = a.shift() - args.x
+ xy.y = a.shift() - args.y
+ args.nodes.push xy
+ return new PolylineWidget args
+ clone: ->
+ return new PolylineWidget @
+ my_path_d: ->
+ ret = ''
+ for n in @nodes
+ if ret is ''
+ ret += 'M'
+ else
+ ret += 'L'
+ ret += n.x + @x
+ ret += ' '
+ ret += n.y + @y
+ return ret
+ set_state: (state) ->
+ super state
+ @update_class()
+ move: (args) ->
+ super args
+ @el.setAttribute 'd', @my_path_d()
+ @reposition_controls()
+ proximity: (xy) -> # return the square of the distance to your visible bits
+ prox = PROX_TOO_FAR
+ for n, i in @nodes
+ dx = @x + n.x - xy.x
+ dy = @y + n.y - xy.y
+ p = dx * dx + dy * dy
+ if p < prox
+ prox = p
+ if i > 0
+ l1x = @x + @nodes[i-1].x
+ l1y = @y + @nodes[i-1].y
+ l2x = @x + @nodes[i].x
+ l2y = @y + @nodes[i].y
+ ldx = l2x - l1x
+ ldy = l2y - l1y
+ if ldx is 0 # vertical line
+ if (xy.y < l1y) is (xy.y < l2y)
+ continue
+ dx = l1x - xy.x
+ p = dx * dx
+ else if ldy is 0 # horizontal line
+ if (xy.x < l1x) is (xy.x < l2x)
+ continue
+ dy = l1y - xy.y
+ p = dy * dy
+ else # slanty line
+ # https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line
+ a = ldy
+ b = -1 * ldx
+ c = l2x * l1y - l2y * l1x
+ y_on_line = (a * (a * xy.y - b * xy.x) - b * c) / (a * a + b * b)
+ if (y_on_line < l1y) is (y_on_line < l2y)
+ continue
+ p = (a * xy.x + b * xy.y + c) / Math.sqrt(a * a + b * b)
+ p *= p
+
+ if p < prox
+ prox = p
+ return prox
+ resize: (wh) ->
+ # FIXME (apply to more than just 2nd node)
+ @nodes[1].x = wh.w
+ @nodes[1].y = wh.h
+ @width = wh.w
+ @height = wh.h
+ @el.setAttribute 'd', @my_path_d()
+ @reposition_controls()
+ return
+ node_dragger: (i) ->
+ if i is 0
+ return (dxy) =>
+ for j in [1...@nodes.length]
+ @nodes[j].x -= dxy.x
+ @nodes[j].y -= dxy.y
+ @move x: @x + dxy.x, y: @y + dxy.y
+ return (dxy) =>
+ @nodes[i].x += dxy.x
+ @nodes[i].y += dxy.y
+ @el.setAttribute 'd', @my_path_d()
+ @reposition_controls()
+ reposition_controls: ->
+ if @controls.length > 1
+ positions = @control_positions()
+ for i in [0...positions.length]
+ @controls[i].move x: positions[i].x, y: positions[i].y
+ return
+ control_positions: ->
+ ret = []
+ for n in @nodes
+ ret.push x: @x + n.x, y: @y + n.y
+ return ret
+ make_controls: (args) -> # create controls, return them
+ if @controls.length > 0
+ if console?.log?
+ console.log "warning: re-adding line controls"
+ @kill_controls()
+ positions = @control_positions()
+ for i in [0...positions.length]
+ @controls.push new ControlPath {
+ svg: @svg
+ x: positions[i].x
+ y: positions[i].y
+ done: args.done
+ drag: @node_dragger i
+ shape: shape_node_move
+ }
return @controls
+CSS_CLASS_TO_PICKLE_TYPE = {
+ box: '0'
+ polyline: '1'
+}
+PICKLE_TYPE_TO_WIDGET_CLASS = [
+ RectWidget
+ PolylineWidget
+]
# called automatically on domcontentloaded
init = ->
svg_offset = null
]
svg.appendChild json_to_svg style:
type: 'text/css'
- contents: '.box.normal,.box.selected{filter: url(#crayon)}'
+ contents: '.box.normal,.polyline.normal{filter: url(#crayon)}'
# create canvas border
svg.appendChild json_to_svg rect:
class: 'canvas_border'
supply = {}
- for args, i in [
- { width: 40, height: 40 }
- { width: 12, height: 50 }
- { width: 70, height: 12 }
- ]
- widget = new RectWidget {
- width: args.width
- height: args.height
- x: 30 + i * 90 + (70 - args.width) / 2
- y: (supply_height - args.height) / 2
- svg: svg
- }
- supply[widget.id] = widget
+ supply_count = 0
+ supply_add = (type, args) ->
+ args.x ?= 0
+ args.y ?= 0
+ args.x += 30 + supply_count * 90
+ args.y += (supply_height - 50) / 2
+ args.svg = svg
+ w = new type args
+ supply[w.id] = w
+ supply_count += 1
+ supply_add RectWidget, width: 50, height: 50
+ supply_add PolylineWidget, y: 25, nodes: [{x: 0, y: 0}, {x: 50, y: 0}]
+ supply_add PolylineWidget, x: 25, nodes: [{x: 0, y: 0}, {x: 0, y: 50}]
+ supply_add PolylineWidget, x: 10, nodes: [{x: 0, y: 0}, {x: 15, y: 50}, {x: 30, y: 0}]
+ supply_add PolylineWidget, y: 50, nodes: [{x: 0, y: 0}, {x: 17, y: -50}, {x: 33, y: 0}, {x: 50, y: -50}]
# editor state
controls_layer = { all: {}, selected: {} }
drag_from = x: 0, y: 0 # mouse was here at last frame of drag
shift_key_down = false
+ lc = "abcdefghijklmnopqrstuvwxyz"
+ uc = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ cc_lca = lc.charCodeAt 0
+ cc_lcz = lc.charCodeAt 25
+ cc_uca = uc.charCodeAt 0
+ cc_ucz = uc.charCodeAt 25
+ cc_0 = '0'.charCodeAt 0
+ cc_9 = '9'.charCodeAt 0
+ # takes an array of positive integers, and encodes it as a string
+ pickle = (a) ->
+ ret = ''
+ for i in a
+ cs = lc
+ r = ''
+ while i > 0 or r is ''
+ digit = i % cs.length
+ i -= digit
+ i /= cs.length
+ r = cs.charAt(digit) + r
+ cs = uc
+ ret += r
+ return ret
+ pickle_widgets = ->
+ ret = '0' # version of this encoding scheme
+ for id, w of widget_layer.all
+ if CSS_CLASS_TO_PICKLE_TYPE[w.css_class]?
+ ret += CSS_CLASS_TO_PICKLE_TYPE[w.css_class]
+ ret += pickle w.as_array()
+ return ret
+ save = ->
+ window.location.hash = pickle_widgets()
+ load = (str) ->
+ return if str.charAt(1) isnt '0'
+ wtype = null
+ args = []
+ ii = 0
+ load_1 = (next_type) ->
+ unless wtype?
+ if next_type?
+ wtype = next_type
+ return
+ w = PICKLE_TYPE_TO_WIDGET_CLASS[wtype]::from_array svg: svg, args
+ widget_layer.all[w.id] = w
+ wtype = next_type
+ args = []
+ ii = 0
+ for i in [2...str.length]
+ c = str.charCodeAt(i)
+ if cc_0 <= c <= cc_9
+ load_1 c - cc_0
+ else if cc_lca <= c <= cc_lcz
+ ii *= lc.length
+ ii += c - cc_lca
+ args.push ii
+ ii = 0
+ else if cc_uca <= c <= cc_ucz
+ ii *= lc.length
+ ii += c - cc_uca
+ load_1 null
stop_editing = ->
if widget_layer.editing
widget_layer.editing.kill_controls()
dragging = true
drag_layer = hit.layer
drag_from = xy
- console.log hit
else
deselect_all widget_layer
return
mouseup = (e) ->
+ save()
mousemove e
if dragging
selected_count = 0
w.drag x: rel_x, y: rel_y
else
hit = closest_in_layers xy
- return unless hit?
- return if hit.s is hovered
- if hovered
+ if hovered and hovered isnt hit?.s
hovered.set_hover false
+ return unless hit?
hovered = hit.s
hovered.set_hover true
return
return true
#($ document).keydown (e) ->
+ if window.location.hash
+ load window.location.hash
+
$ init
Got questions, comments, patches, etc.? Contact Jason Woofenden