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497 lines
16 KiB
497 lines
16 KiB
const { getColor } = require('./themes')
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const {
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ATTR_FG,
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ATTR_BG,
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ATTR_BOLD,
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ATTR_UNDERLINE,
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ATTR_BLINK,
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ATTR_ITALIC,
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ATTR_STRIKE,
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ATTR_OVERLINE,
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ATTR_FAINT,
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ATTR_FRAKTUR
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} = require('./screen_attr_bits')
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module.exports = function attachDebugger (screen, connection) {
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const debugCanvas = document.createElement('canvas')
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debugCanvas.classList.add('debug-canvas')
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const ctx = debugCanvas.getContext('2d')
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const toolbar = document.createElement('div')
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toolbar.classList.add('debug-toolbar')
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const tooltip = document.createElement('div')
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tooltip.classList.add('debug-tooltip')
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tooltip.classList.add('hidden')
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let updateTooltip
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let updateToolbar
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let selectedCell = null
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let mousePosition = null
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const onMouseMove = (e) => {
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if (e.target !== screen.layout.canvas) {
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selectedCell = null
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return
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}
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selectedCell = screen.layout.screenToGrid(e.offsetX, e.offsetY)
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mousePosition = [e.offsetX, e.offsetY]
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updateTooltip()
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}
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const onMouseOut = (e) => {
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selectedCell = null
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tooltip.classList.add('hidden')
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}
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const updateCanvasSize = function () {
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let { width, height, devicePixelRatio } = screen.layout.window
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let cellSize = screen.layout.getCellSize()
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let padding = Math.round(screen.layout._padding)
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debugCanvas.width = (width * cellSize.width + 2 * padding) * devicePixelRatio
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debugCanvas.height = (height * cellSize.height + 2 * padding) * devicePixelRatio
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debugCanvas.style.width = `${width * cellSize.width + 2 * screen.layout._padding}px`
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debugCanvas.style.height = `${height * cellSize.height + 2 * screen.layout._padding}px`
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}
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let startDrawLoop
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let screenAttached = false
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let eventNode
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const setScreenAttached = function (attached) {
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if (attached && !debugCanvas.parentNode) {
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screen.layout.canvas.parentNode.appendChild(debugCanvas)
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eventNode = debugCanvas.parentNode
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eventNode.addEventListener('mousemove', onMouseMove)
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eventNode.addEventListener('mouseout', onMouseOut)
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screen.layout.on('size-update', updateCanvasSize)
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updateCanvasSize()
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screenAttached = true
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startDrawLoop()
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} else if (!attached && debugCanvas.parentNode) {
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debugCanvas.parentNode.removeChild(debugCanvas)
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eventNode.removeEventListener('mousemove', onMouseMove)
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eventNode.removeEventListener('mouseout', onMouseOut)
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screen.layout.removeListener('size-update', updateCanvasSize)
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screenAttached = false
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}
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}
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const setToolbarAttached = function (attached) {
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if (attached && !toolbar.parentNode) {
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screen.layout.canvas.parentNode.appendChild(toolbar)
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screen.layout.canvas.parentNode.appendChild(tooltip)
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updateToolbar()
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} else if (!attached && toolbar.parentNode) {
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screen.layout.canvas.parentNode.removeChild(toolbar)
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screen.layout.canvas.parentNode.removeChild(tooltip)
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}
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}
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screen.on('update-window:debug', enabled => {
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setToolbarAttached(enabled)
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})
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screen.layout.on('update-window:debug', enabled => {
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setScreenAttached(enabled)
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})
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let drawData = {
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reason: '',
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showUpdates: false,
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startTime: 0,
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endTime: 0,
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clipped: [],
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frames: [],
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cells: new Map(),
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scrollRegion: null
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}
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screen._debug = screen.layout.renderer._debug = {
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drawStart (reason) {
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drawData.reason = reason
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drawData.startTime = window.performance.now()
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},
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drawEnd () {
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drawData.endTime = window.performance.now()
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},
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setCell (cell, flags) {
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drawData.cells.set(cell, [flags, window.performance.now()])
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},
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pushFrame (frame) {
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drawData.frames.push([...frame, window.performance.now()])
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}
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}
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let isDrawing = false
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let drawLoop = function () {
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if (screenAttached) window.requestAnimationFrame(drawLoop)
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else isDrawing = false
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let now = window.performance.now()
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let { width, height, devicePixelRatio } = screen.layout.window
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let padding = Math.round(screen.layout._padding)
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let cellSize = screen.layout.getCellSize()
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ctx.setTransform(devicePixelRatio, 0, 0, devicePixelRatio, 0, 0)
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ctx.clearRect(0, 0, width * cellSize.width + 2 * padding, height * cellSize.height + 2 * padding)
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ctx.translate(padding, padding)
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ctx.lineWidth = 2
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ctx.lineJoin = 'round'
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if (drawData.showUpdates) {
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const cells = drawData.cells
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for (let cell = 0; cell < width * height; cell++) {
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// cell does not exist or has no flags set
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if (!cells.has(cell) || cells.get(cell)[0] === 0) continue
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const [flags, timestamp] = cells.get(cell)
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let elapsedTime = (now - timestamp) / 1000
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if (elapsedTime > 1) {
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cells.delete(cell)
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continue
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}
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ctx.globalAlpha = 0.5 * Math.max(0, 1 - elapsedTime)
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let x = cell % width
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let y = Math.floor(cell / width)
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if (flags & 2) {
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// updated
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ctx.fillStyle = '#0f0'
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} else if (flags & 1) {
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// redrawn
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ctx.fillStyle = '#f0f'
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}
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if (!(flags & 4)) {
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// outside a clipped region
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ctx.fillStyle = '#0ff'
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}
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ctx.fillRect(x * cellSize.width, y * cellSize.height, cellSize.width, cellSize.height)
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if (flags & 8) {
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// wide cell
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ctx.strokeStyle = '#f00'
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ctx.beginPath()
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ctx.moveTo(x * cellSize.width, (y + 1) * cellSize.height)
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ctx.lineTo((x + 1) * cellSize.width, (y + 1) * cellSize.height)
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ctx.stroke()
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}
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}
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let framesToDelete = []
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for (let frame of drawData.frames) {
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let timestamp = frame[4]
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let elapsedTime = (now - timestamp) / 1000
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if (elapsedTime > 1) framesToDelete.push(frame)
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else {
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ctx.globalAlpha = 1 - elapsedTime
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ctx.strokeStyle = '#ff0'
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ctx.strokeRect(frame[0] * cellSize.width, frame[1] * cellSize.height,
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frame[2] * cellSize.width, frame[3] * cellSize.height)
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}
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}
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for (let frame of framesToDelete) {
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drawData.frames.splice(drawData.frames.indexOf(frame), 1)
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}
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}
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if (selectedCell !== null) {
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let [x, y] = selectedCell
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ctx.save()
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ctx.globalAlpha = 0.5
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ctx.lineWidth = 1
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// draw X line
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ctx.beginPath()
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ctx.moveTo(0, y * cellSize.height)
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ctx.lineTo(x * cellSize.width, y * cellSize.height)
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ctx.strokeStyle = '#f00'
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ctx.setLineDash([cellSize.width])
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ctx.stroke()
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// draw Y line
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ctx.beginPath()
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ctx.moveTo(x * cellSize.width, 0)
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ctx.lineTo(x * cellSize.width, y * cellSize.height)
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ctx.strokeStyle = '#0f0'
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ctx.setLineDash([cellSize.height])
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ctx.stroke()
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ctx.globalAlpha = 1
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ctx.lineWidth = 1 + 0.5 * Math.sin((now / 1000) * 10)
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ctx.strokeStyle = '#fff'
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ctx.lineJoin = 'round'
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ctx.setLineDash([2, 2])
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ctx.lineDashOffset = (now / 1000) * 10
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ctx.strokeRect(x * cellSize.width, y * cellSize.height, cellSize.width, cellSize.height)
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ctx.lineDashOffset += 2
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ctx.strokeStyle = '#000'
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ctx.strokeRect(x * cellSize.width, y * cellSize.height, cellSize.width, cellSize.height)
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ctx.restore()
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}
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if (drawData.scrollRegion !== null) {
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let [start, end] = drawData.scrollRegion
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ctx.save()
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ctx.globalAlpha = 1
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ctx.strokeStyle = '#00f'
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ctx.lineWidth = 2
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ctx.setLineDash([2, 2])
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ctx.beginPath()
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ctx.moveTo(0, start * cellSize.height)
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ctx.lineTo(width * cellSize.width, start * cellSize.height)
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ctx.stroke()
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ctx.beginPath()
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ctx.moveTo(0, (end + 1) * cellSize.height)
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ctx.lineTo(width * cellSize.width, (end + 1) * cellSize.height)
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ctx.stroke()
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ctx.restore()
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}
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}
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startDrawLoop = function () {
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if (isDrawing) return
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isDrawing = true
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drawLoop()
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}
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let pad2 = i => ('00' + i.toString()).substr(-2)
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let formatColor = color => color < 256
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? color.toString()
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: '#' + pad2(color >> 16) + pad2((color >> 8) & 0xFF) + pad2(color & 0xFF)
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let makeSpan = (text, styles) => {
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let span = document.createElement('span')
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span.textContent = text
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Object.assign(span.style, styles || {})
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return span
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}
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let formatAttributes = (target, attrs) => {
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if (attrs & ATTR_FG) target.appendChild(makeSpan('HasFG'))
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if (attrs & ATTR_BG) target.appendChild(makeSpan('HasBG'))
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if (attrs & ATTR_BOLD) target.appendChild(makeSpan('Bold', { fontWeight: 'bold' }))
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if (attrs & ATTR_UNDERLINE) target.appendChild(makeSpan('Uline', { textDecoration: 'underline' }))
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if (attrs & ATTR_BLINK) target.appendChild(makeSpan('Blink'))
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if (attrs & ATTR_ITALIC) target.appendChild(makeSpan('Italic', { fontStyle: 'italic' }))
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if (attrs & ATTR_STRIKE) target.appendChild(makeSpan('Strike', { textDecoration: 'line-through' }))
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if (attrs & ATTR_OVERLINE) target.appendChild(makeSpan('Oline', { textDecoration: 'overline' }))
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if (attrs & ATTR_FAINT) target.appendChild(makeSpan('Faint', { opacity: 0.5 }))
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if (attrs & ATTR_FRAKTUR) target.appendChild(makeSpan('Fraktur'))
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}
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// tooltip
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updateTooltip = function () {
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tooltip.classList.remove('hidden')
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tooltip.innerHTML = ''
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let cell = selectedCell[1] * screen.window.width + selectedCell[0]
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if (!screen.screen[cell]) return
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let foreground = document.createElement('span')
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foreground.textContent = formatColor(screen.screenFG[cell])
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let preview = document.createElement('span')
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preview.textContent = ' ●'
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preview.style.color = getColor(screen.screenFG[cell], screen.layout.renderer.palette)
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foreground.appendChild(preview)
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let background = document.createElement('span')
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background.textContent = formatColor(screen.screenBG[cell])
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let bgPreview = document.createElement('span')
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bgPreview.textContent = ' ●'
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bgPreview.style.color = getColor(screen.screenBG[cell], screen.layout.renderer.palette)
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background.appendChild(bgPreview)
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let character = screen.screen[cell]
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let codePoint = character.codePointAt(0)
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let formattedCodePoint = codePoint.toString(16).length <= 4
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? `0000${codePoint.toString(16)}`.substr(-4)
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: codePoint.toString(16)
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let attributes = document.createElement('span')
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attributes.classList.add('attributes')
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formatAttributes(attributes, screen.screenAttrs[cell])
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let data = {
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Cell: `col ${selectedCell[0] + 1}, ln ${selectedCell[1] + 1} (${cell})`,
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Foreground: foreground,
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Background: background,
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Character: `U+${formattedCodePoint}`,
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Attributes: attributes
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}
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let table = document.createElement('table')
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for (let name in data) {
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let row = document.createElement('tr')
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let label = document.createElement('td')
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label.appendChild(new window.Text(name))
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label.classList.add('label')
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let value = document.createElement('td')
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value.appendChild(typeof data[name] === 'string' ? new window.Text(data[name]) : data[name])
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value.classList.add('value')
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row.appendChild(label)
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row.appendChild(value)
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table.appendChild(row)
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}
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tooltip.appendChild(table)
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let cellSize = screen.layout.getCellSize()
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// add 3 to the position because for some reason the corner is off
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let posX = (selectedCell[0] + 1) * cellSize.width + 3
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let posY = (selectedCell[1] + 1) * cellSize.height + 3
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tooltip.style.transform = `translate(${posX}px, ${posY}px)`
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}
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let toolbarData = null
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let toolbarNodes = {}
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const initToolbar = function () {
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if (toolbarData) return
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let showUpdates = document.createElement('input')
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showUpdates.type = 'checkbox'
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showUpdates.addEventListener('change', e => {
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drawData.showUpdates = showUpdates.checked
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})
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let fancyGraphics = document.createElement('input')
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fancyGraphics.type = 'checkbox'
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fancyGraphics.value = !!screen.layout.window.graphics
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fancyGraphics.addEventListener('change', e => {
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screen.layout.window.graphics = +fancyGraphics.checked
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})
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toolbarData = {
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cursor: {
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title: 'Cursor',
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Position: '',
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Style: '',
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Visible: true,
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Hanging: false
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},
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internal: {
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Flags: '',
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'Cursor Attributes': '',
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'Code Page': '',
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Heap: 0,
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Clients: 0
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},
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drawing: {
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title: 'Drawing',
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'Last Update': '',
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'Show Updates': showUpdates,
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'Fancy Graphics': fancyGraphics,
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'Redraw Screen': () => {
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screen.layout.renderer.resetDrawn()
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screen.layout.renderer.draw('debug-redraw')
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}
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}
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}
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for (let i in toolbarData) {
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let group = toolbarData[i]
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let table = document.createElement('table')
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table.classList.add('toolbar-group')
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toolbarNodes[i] = {}
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for (let key in group) {
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let item = document.createElement('tr')
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let name = document.createElement('td')
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name.classList.add('name')
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let value = document.createElement('td')
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value.classList.add('value')
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toolbarNodes[i][key] = { name, value }
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if (key === 'title') {
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name.textContent = group[key]
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name.classList.add('title')
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} else {
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name.textContent = key
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if (group[key] instanceof Function) {
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name.textContent = ''
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let button = document.createElement('button')
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name.classList.add('has-button')
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name.appendChild(button)
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button.textContent = key
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button.addEventListener('click', e => group[key](e))
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} else if (group[key] instanceof window.Node) value.appendChild(group[key])
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else value.textContent = group[key]
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}
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item.appendChild(name)
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item.appendChild(value)
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table.appendChild(item)
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}
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toolbar.appendChild(table)
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}
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let heartbeat = toolbarNodes.heartbeat = document.createElement('div')
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heartbeat.classList.add('heartbeat')
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heartbeat.textContent = '❤'
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toolbar.appendChild(heartbeat)
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}
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connection.on('heartbeat', () => {
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if (screenAttached && toolbarNodes.heartbeat) {
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toolbarNodes.heartbeat.classList.remove('beat')
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window.requestAnimationFrame(() => {
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toolbarNodes.heartbeat.classList.add('beat')
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})
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}
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})
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updateToolbar = function () {
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initToolbar()
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Object.assign(toolbarData.cursor, {
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Position: `col ${screen.cursor.x + 1}, ln ${screen.cursor.y + 1}`,
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Style: screen.cursor.style + (screen.cursor.blinking ? ', blink' : ''),
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Visible: screen.cursor.visible,
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Hanging: screen.cursor.hanging
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})
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let drawTime = Math.round((drawData.endTime - drawData.startTime) * 100) / 100
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toolbarData.drawing['Last Update'] = `${drawData.reason} (${drawTime}ms)`
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toolbarData.drawing['Fancy Graphics'].checked = !!screen.layout.window.graphics
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for (let i in toolbarData) {
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let group = toolbarData[i]
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let nodes = toolbarNodes[i]
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for (let key in group) {
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if (key === 'title') continue
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let value = nodes[key].value
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if (!(group[key] instanceof window.Node) && !(group[key] instanceof Function)) {
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value.textContent = group[key]
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}
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}
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}
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}
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screen.on('update', updateToolbar)
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screen.on('internal', data => {
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if (screenAttached && toolbarData) {
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Object.assign(toolbarData.internal, {
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Flags: data.flags.toString(2),
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'Cursor Attributes': data.cursorAttrs.toString(2),
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'Code Page': `${data.charsetGx} (${data.charsetG0}, ${data.charsetG1})`,
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Heap: data.freeHeap,
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Clients: data.clientCount
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})
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drawData.scrollRegion = [data.regionStart, data.regionEnd]
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updateToolbar()
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}
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})
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}
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