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TextLayer.coffee
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TextLayer.coffee
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{Layer, layerProperty, updateShadow} = require "./Layer"
{LayerStyle} = require "./LayerStyle"
{StyledText} = require "./StyledText"
validateFont = (arg) ->
return _.isString(arg) or _.isObject(arg)
fontFamilyFromObject = (font) ->
return if _.isObject(font) then font.fontFamily else font
textProperty = (obj, name, fallback, validator, transformer, set) ->
layerProperty(obj, name, name, fallback, validator, transformer, {}, set, "_elementHTML")
asPadding = (value) ->
return value if _.isNumber(value)
return 0 if not _.isObject(value)
result = {}
isValidObject = false
if value.horizontal?
value.left ?= value.horizontal
value.right ?= value.horizontal
if value.vertical?
value.top ?= value.vertical
value.bottom ?= value.vertical
for key in ["left", "right", "bottom", "top"]
isValidObject ||= _.has(value, key)
result[key] = value[key] ? 0
return if not isValidObject then 0 else result
class exports.TextLayer extends Layer
@_textProperties = [
"text"
"fontFamily"
"fontSize"
"fontWeight"
"fontStyle"
"lineHeight"
"letterSpacing"
"wordSpacing"
"textAlign"
"textTransform"
"textIndent"
"textDecoration"
"textOverflow"
"whiteSpace"
"direction"
"font"
"borderWidth"
"padding"
]
@_textStyleProperties = _.pull(_.clone(TextLayer._textProperties), "text").concat(["color", "shadowX", "shadowY", "shadowBlur", "shadowColor"])
constructor: (options={}) ->
_.defaults options,
shadowType: "text"
clip: true
createHTMLElement: true
if options.styledText?
@styledTextOptions = options.styledText
options.color ?= @_styledText.getStyle("color")
options.fontSize ?= parseFloat(@_styledText.getStyle("fontSize"))
options.lineHeight ?= parseFloat(@_styledText.getStyle("lineHeight"))
else
_.defaults options,
backgroundColor: "transparent"
text: "Hello World"
color: "#888"
fontSize: 40
fontWeight: 400
lineHeight: 1.25
padding: 0
if not options.font? and not options.fontFamily?
options.fontFamily = @defaultFont()
@_styledText.addBlock options.text
super options
@__constructor = true
# Keeps track if the width or height are explicitly set, so we shouldn't update it afterwards
if not options.autoSize? and not options.truncate
if not options.autoWidth?
explicitWidth = options.width? or _.isNumber(options?.size) or options?.size?.width? or options?.frame?.width?
@autoWidth = not explicitWidth
if not options.autoHeight?
explicitHeight = options.height? or _.isNumber(options?.size) or options?.size?.height? or options?.frame?.height?
@autoHeight = not explicitHeight
if not options.styledText?
@font ?= @fontFamily
@_styledText.setElement(@_elementHTML)
delete @__constructor
@renderText()
# Executing function properties like Align.center again
for key, value of options
if _.isFunction(value) and @[key]?
@[key] = value
for property in TextLayer._textStyleProperties
do (property) =>
@on "change:#{property}", (value) =>
return if value is null
# make an exception for fontSize, as it needs to be set on the inner style
if not (property in ["fontSize", "font"])
@_styledText.resetStyle(property)
@renderText()
@on "change:width", @updateAutoWidth
@on "change:height", @updateAutoHeight
@on "change:parent", @renderText
updateAutoWidth: (value) =>
return if @disableAutosizeUpdating
@autoWidth = false
updateAutoHeight: (value) =>
return if @disableAutosizeUpdating
@autoHeight = false
copySingle: ->
props = @props
delete props["width"] if @autoWidth
delete props["height"] if @autoHeight
copy = new @constructor(props)
copy.style = @style
copy
@define "_styledText",
get: ->
if not @__styledText?
@__styledText = new StyledText()
return @__styledText
set: (value) ->
return unless value instanceof StyledText
@__styledText = value
@define "styledTextOptions",
get: -> @_styledText?.getOptions()
set: (value) ->
@_styledText = new StyledText(value)
@_styledText.setElement(@_elementHTML)
#Vekter properties
@define "autoWidth", @proxyProperty("_styledText.autoWidth",
didSet: (layer, value) ->
layer.renderText()
)
@define "autoHeight", @proxyProperty("_styledText.autoHeight",
didSet: (layer, value) ->
layer.renderText()
)
@define "autoSize",
get: -> @autoWidth and @autoHeight
set: (value) ->
@autoWidth = value
@autoHeight = value
@renderText()
@define "fontFamily", textProperty(@, "fontFamily", null, _.isString, fontFamilyFromObject, (layer, value) ->
return if value is null
layer.font = value
)
@define "fontWeight", textProperty(@, "fontWeight")
@define "fontStyle", textProperty(@, "fontStyle", "normal", _.isString)
@define "textDecoration", textProperty(@, "textDecoration", null, _.isString)
@define "fontSize", textProperty(@, "fontSize", null, _.isNumber, null, (layer, value) ->
return if value is null
style = LayerStyle["fontSize"](layer)
layer._styledText.setStyle("fontSize", style)
)
@define "textAlign", textProperty(@, "textAlign")
@define "letterSpacing", textProperty(@, "letterSpacing", null, _.isNumber)
@define "lineHeight", textProperty(@, "lineHeight", null, _.isNumber)
#Custom properties
@define "wordSpacing", textProperty(@, "wordSpacing", null, _.isNumber)
@define "textTransform", textProperty(@, "textTransform", "none", _.isString)
@define "textIndent", textProperty(@, "textIndent", null, _.isNumber)
@define "wordWrap", textProperty(@, "wordWrap", null, _.isString)
@define "textOverflow",
get: -> @_styledText.textOverflow
set: (value) ->
@_styledText.setTextOverflow(value)
@renderText()
@define "truncate",
get: -> @textOverflow is "ellipsis"
set: (truncate) ->
if truncate
@autoSize = false
@textOverflow = "ellipsis"
else
@textOverflow = null
@define "whiteSpace", textProperty(@, "whiteSpace", null, _.isString)
@define "direction", textProperty(@, "direction", null, _.isString)
@define "html",
get: ->
@_elementHTML?.innerHTML or ""
@define "font", layerProperty @, "font", null, null, validateFont, null, {}, (layer, value) ->
return if value is null
if _.isObject(value)
layer.fontFamily = value.fontFamily
layer.fontWeight = value.fontWeight
return
# Check if value contains number. We then assume proper use of font.
# Otherwise, we default to setting the fontFamily.
if /\d/.test(value)
layer._styledText.setStyle("font", value)
else
layer.fontFamily = value
, "_elementHTML"
@define "textDirection",
get: -> @direction
set: (value) -> @direction = value
@define "padding", layerProperty(@, "padding", "padding", 0, null, asPadding)
@define "text",
get: -> @_styledText.getText()
set: (value) ->
@_styledText.setText(value)
@renderText()
@emit("change:text", value)
@define "value", layerProperty(@, "value", null, null, null, null, {exportable: false}, (layer, value) ->
if layer.transform?
value = layer.transform(value)
layer.text = "#{value}"
)
@define "transform", layerProperty(@, "transform", null, null, _.isFunction, null, {exportable: false}, (layer, transform) ->
if layer.transform?
layer.text = layer.transform(layer.value) + ''
)
renderText: =>
return if @__constructor
@_styledText.render()
@_updateHTMLScale()
parentWidth = if @parent? then @parent.width else Screen.width
constrainedWidth = if @autoWidth then parentWidth else @size.width
padding = Utils.rectZero(Utils.parseRect(@padding))
constrainedWidth -= (padding.left + padding.right)
if @autoHeight
constrainedHeight = null
else
constrainedHeight = @size.height - (padding.top + padding.bottom)
constraints =
width: constrainedWidth
height: constrainedHeight
multiplier: @context.pixelMultiplier
calculatedSize = @_styledText.measure constraints
@disableAutosizeUpdating = true
if calculatedSize.width?
@width = calculatedSize.width + padding.left + padding.right
if calculatedSize.height?
@height = calculatedSize.height + padding.top + padding.bottom
@disableAutosizeUpdating = false
defaultFont: ->
return Utils.deviceFont(Framer.Device.platform())
replace: (search, replace) ->
oldText = @text
@_styledText.replace(search, replace)
if @text isnt oldText
@renderText()
@emit("change:text", @text)