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109 lines
2.6 KiB
CoffeeScript
109 lines
2.6 KiB
CoffeeScript
class AsciiIo.Renderer.Canvas extends AsciiIo.Renderer.Base
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tagName: 'canvas'
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className: 'terminal'
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events:
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'click': 'onClick'
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initialize: (options) ->
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super(options)
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@ctx = @el.getContext('2d')
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@cursorOn = true
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@cursorVisible = true
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afterInsertedToDom: ->
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sample = $('<span class="font-sample">M</span>')
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@$el.parent().append(sample)
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@cellWidth = sample.width()
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@cellHeight = sample.height()
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sample.remove()
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@$el.attr('width', @cols * @cellWidth)
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@$el.attr('height', @lines * @cellHeight)
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@setFont()
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setFont: ->
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size = @$el.css('font-size')
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family = @$el.css('font-family')
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@font = "#{size} #{family}"
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@ctx.font = @font
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@prevFont = @font
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@ctx.textBaseline = 'bottom'
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renderLine: (n, fragments, cursorX) ->
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left = 0
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width = @cols * @cellWidth
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top = n * @cellHeight
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cursorText = undefined
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rendered = 0
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for fragment in fragments
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[text, brush] = fragment
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if cursorX isnt undefined and rendered <= cursorX < rendered + text.length
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@cursorBrush = brush
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@cursorText = text[cursorX - rendered]
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@cursorX = cursorX
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@cursorY = n
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@setBackgroundAttributes(brush)
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@ctx.fillRect left, top, text.length * @cellWidth, @cellHeight
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unless text.match(/^\s*$/)
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@setTextAttributes(brush)
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@ctx.fillText text, left, top + @cellHeight
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left += text.length * @cellWidth
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rendered += text.length
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if cursorX
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@renderCursor()
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setBackgroundAttributes: (brush) ->
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@ctx.fillStyle = AsciiIo.colors[brush.bgColor()]
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setTextAttributes: (brush) ->
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@ctx.fillStyle = AsciiIo.colors[brush.fgColor()]
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font = @font
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if brush.bright or brush.italic
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if brush.bright
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font = "bold #{font}"
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if brush.italic
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font = "italic #{font}"
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if font != @prevFont
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@ctx.font = font
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@prevFont = font
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renderCursor: ->
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return unless @cursorOn and @cursorText
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x = @cursorX * @cellWidth
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y = @cursorY * @cellHeight
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if @cursorVisible
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@ctx.fillStyle = AsciiIo.colors[7]
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@ctx.fillRect x, y, @cellWidth, @cellHeight
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@ctx.fillStyle = AsciiIo.colors[0]
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@ctx.fillText @cursorText, x, y + @cellHeight
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else
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@ctx.fillStyle = AsciiIo.colors[@cursorBrush.bgColor()]
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@ctx.fillRect x, y, @cellWidth, @cellHeight
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@ctx.fillStyle = AsciiIo.colors[@cursorBrush.fgColor()]
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@ctx.fillText @cursorText, x, y + @cellHeight
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showCursor: (show) ->
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@cursorOn = show
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blinkCursor: ->
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@cursorVisible = !@cursorVisible
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@renderCursor()
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resetCursorState: ->
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@cursorVisible = true
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@renderCursor()
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