本站更換主題啦！

故事要從四天前說起...

那天，我像往常一樣刷著網站，偶然發現了DIYgod大佬的博客，看著這精美的主題，再回頭審視一下自己使用的簡陋到爆的next，不禁萌生了更換主題的想法。

根據footer裡的信息，我找到了這個主題Sagiri的托管地址，將其下載了下來，配置好_config.yml文件並hexo s，本以為事情就這樣結束了。然並卵，我發現有很多功能都無法正常使用，正如他本人在這篇文章中寫的一樣：

主題雖然開源了，但是屬於自用性質的項目，很多應該做成可定制化的地方都沒有做，從開源項目的視角來看做得並不好，而我目前又對製作主題並沒有太高的興致，所以使用之前還請慎重考慮

然而這是後話了，當時的我並沒有看到這些，於是頭鐵地開始了主題文件的增刪改查之路（此處省略一萬字）。

四天過去了，通過對文件的深度剖析（指刪除很多本來就有的模塊然後重新添加），我深刻地了解了css、html和javascript，明白了hexo主題的組織形式（並沒有），於是準備記錄一下這個主題部分特性的實現方式：

網頁無刷新跳轉 / 自動滾動到正文

使用pjax實現，主要參考這篇文章。

根據網頁狀態動態修改標題

// cheat.js
var OriginTitle = document.title;
var titleTime;
document.addEventListener('visibilitychange', function () {
    if (document.hidden) {
        $('[rel="icon"]').attr('href', "/images/failure.ico");
        document.title = '╭(°A°`)╮ 頁面崩潰啦 ~';
        clearTimeout(titleTime);
    }
    else {
        $('[rel="icon"]').attr('href', "/images/favicon.ico");
        document.title = '(ฅ>ω<*ฅ) 噫又好了~' + OriginTitle;
        titleTime = setTimeout(function () {
            document.title = OriginTitle;
        }, 2000);
    }
});

隨機的絲帶背景

// evan-you.js
/*<canvas id="evanyou"></canvas>*/
if (document.getElementById('evanyou')) {
  var c = document.getElementById('evanyou'),
    x = c.getContext('2d'),
    pr = window.devicePixelRatio || 1,
    w = window.innerWidth,
    h = window.innerHeight,
    f = 90,
    q,
    m = Math,
    r = 0,
    u = m.PI * 2,
    v = m.cos,
    z = m.random
  c.width = w * pr
  c.height = h * pr
  x.scale(pr, pr)
  x.globalAlpha = 0.6
  function evanyou () {
    x.clearRect(0, 0, w, h)
    q = [{ x: 0, y: h * .7 + f }, { x: 0, y: h * .7 - f }]
    while (q[1].x < w + f) d(q[0], q[1])
  }
  function d (i, j) {
    x.beginPath()
    x.moveTo(i.x, i.y)
    x.lineTo(j.x, j.y)
    var k = j.x + (z() * 2 - 0.25) * f,
      n = y(j.y)
    x.lineTo(k, n)
    x.closePath()
    r -= u / -50
    x.fillStyle = '#' + (v(r) * 127 + 128 << 16 | v(r + u / 3) * 127 + 128 << 8 | v(r + u / 3 * 2) * 127 + 128).toString(16)
    x.fill()
    q[0] = q[1]
    q[1] = { x: k, y: n }
  }
  function y (p) {
    var t = p + (z() * 2 - 1.1) * f
    return (t > h || t < 0) ? y(p) : t
  }
  document.onclick = evanyou
  document.ontouchstart = evanyou
  evanyou()
}

點擊的煙花效果

// fireworks.js
class Circle {
  constructor({ origin, speed, color, angle, context }) {
    this.origin = origin
    this.position = { ...this.origin }
    this.color = color
    this.speed = speed
    this.angle = angle
    this.context = context
    this.renderCount = 0
  }

  draw() {
    this.context.fillStyle = this.color
    this.context.beginPath()
    this.context.arc(this.position.x, this.position.y, 2, 0, Math.PI * 2)
    this.context.fill()
  }

  move() {
    this.position.x = (Math.sin(this.angle) * this.speed) + this.position.x
    this.position.y = (Math.cos(this.angle) * this.speed) + this.position.y + (this.renderCount * 0.3)
    this.renderCount++
  }
}

class Boom {
  constructor ({ origin, context, circleCount = 16, area }) {
    this.origin = origin
    this.context = context
    this.circleCount = circleCount
    this.area = area
    this.stop = false
    this.circles = []
  }

  randomArray(range) {
    const length = range.length
    const randomIndex = Math.floor(length * Math.random())
    return range[randomIndex]
  }

  randomColor() {
    const range = ['8', '9', 'A', 'B', 'C', 'D', 'E', 'F']
    return '#' + this.randomArray(range) + this.randomArray(range) + this.randomArray(range) + this.randomArray(range) + this.randomArray(range) + this.randomArray(range)
  }

  randomRange(start, end) {
    return (end - start) * Math.random() + start
  }

  init() {
    for(let i = 0; i < this.circleCount; i++) {
      const circle = new Circle({
        context: this.context,
        origin: this.origin,
        color: this.randomColor(),
        angle: this.randomRange(Math.PI - 1, Math.PI + 1),
        speed: this.randomRange(1, 6)
      })
      this.circles.push(circle)
    }
  }

  move() {
    this.circles.forEach((circle, index) => {
      if (circle.position.x > this.area.width || circle.position.y > this.area.height) {
        return this.circles.splice(index, 1)
      }
      circle.move()
    })
    if (this.circles.length == 0) {
      this.stop = true
    }
  }

  draw() {
    this.circles.forEach(circle => circle.draw())
  }
}

class CursorSpecialEffects {
  constructor() {
    this.computerCanvas = document.createElement('canvas')
    this.renderCanvas = document.createElement('canvas')

    this.computerContext = this.computerCanvas.getContext('2d')
    this.renderContext = this.renderCanvas.getContext('2d')

    this.globalWidth = window.innerWidth
    this.globalHeight = window.innerHeight

    this.booms = []
    this.running = false
  }

  handleMouseDown(e) {
    const boom = new Boom({
      origin: { x: e.clientX, y: e.clientY },
      context: this.computerContext,
      area: {
        width: this.globalWidth,
        height: this.globalHeight
      }
    })
    boom.init()
    this.booms.push(boom)
    this.running || this.run()
  }

  handlePageHide() {
    this.booms = []
    this.running = false
  }

  init() {
    const style = this.renderCanvas.style
    style.position = 'fixed'
    style.top = style.left = 0
    style.zIndex = '999999999999999999999999999999999999999999'
    style.pointerEvents = 'none'

    style.width = this.renderCanvas.width = this.computerCanvas.width = this.globalWidth
    style.height = this.renderCanvas.height = this.computerCanvas.height = this.globalHeight

    document.body.append(this.renderCanvas)

    window.addEventListener('mousedown', this.handleMouseDown.bind(this))
    window.addEventListener('pagehide', this.handlePageHide.bind(this))
  }

  run() {
    this.running = true
    if (this.booms.length == 0) {
      return this.running = false
    }

    requestAnimationFrame(this.run.bind(this))

    this.computerContext.clearRect(0, 0, this.globalWidth, this.globalHeight)
    this.renderContext.clearRect(0, 0, this.globalWidth, this.globalHeight)

    this.booms.forEach((boom, index) => {
      if (boom.stop) {
        return this.booms.splice(index, 1)
      }
      boom.move()
      boom.draw()
    })
    this.renderContext.drawImage(this.computerCanvas, 0, 0, this.globalWidth, this.globalHeight)
  }
}

const cursorSpecialEffects = new CursorSpecialEffects()
cursorSpecialEffects.init()

側欄的固定

使用affix實現，主要參考這篇文章。
valine評論系統支持pjax

參考這個 issue。

害，換個主題真的太難了，一年之內不打算再換了！

好了，寫完去睡覺啦 XD！

2020.1.30 23:12:33

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