完成分页组件的迁移;优化button组件

Readme.md

@@ -42,7 +42,7 @@
 - [x] `wc-markd`markdown 组件
 - [ ] `wc-meditor`md 文本编辑器
 - [ ] `wc-neditor`富文本编辑器
-- [ ] `wc-pager`分页组件
+- [x] `wc-pager`分页组件
 - [x] `wc-color`颜色选择器
 - [ ] `wc-datepicker`日期选择器
 - [ ] `wc-timepicker`时间选择器

src/form/button.js

@@ -4,7 +4,7 @@
  * @date 2023/03/06 15:17:25
  */
 
-import { css, html, Component, nextTick } from '@bd/core'
+import { css, html, Component, nextTick, styleMap } from '@bd/core'
 import '../icon/index.js'
 
 class Button extends Component {
@@ -62,7 +62,7 @@ class Button extends Component {
           outline: none;
           color: inherit;
           cursor: inherit;
-          transition: background 0.15s linear;
+          transition: background 0.15s linear, color 0.15s linear;
 
           &::-moz-focus-inner {
             border: none;
@@ -70,8 +70,7 @@ class Button extends Component {
         }
 
         .icon {
-          --size: var(--icon-size, 18px);
+          --size: var(--icon-size, 14px);
-          margin-right: 4px;
         }
       }
       :host(:focus-within) {
@@ -121,7 +120,7 @@ class Button extends Component {
           font-size: map.get($v, 'f');
 
           .icon {
-            --size: #{map.get($v, 'f')};
+            --size: var(--icon-size, #{map.get($v, 'f')});
           }
         }
         :host([size='#{$s}'][circle]) {
@@ -161,18 +160,19 @@ class Button extends Component {
         warning: 'orange',
         danger: 'red',
         secondary: 'dark',
-        help: 'grey'
+        help: 'grey',
+        plain: 'plain'
       );
 
       @loop $t, $c in $colors {
         :host([type='#{$t}']) {
           button {
             color: var(--color-#{$c}-2);
-            border-color: var(--color-#{$c}-2);
+            border-color: var(--color-#{$c}-1);
 
             &:hover {
               color: var(--color-#{$c}-1);
-              border-color: var(--color-#{$c}-1);
+              border-color: var(--color-#{$c}-2);
             }
             &:active {
               color: var(--color-#{$c}-3);
@@ -184,7 +184,11 @@ class Button extends Component {
 
           &:host([solid]) button {
             border: 0;
-            color: #fff;
+            @if $t == 'plain' {
+              color: var(--color-dark-1);
+            } @else {
+              color: #fff;
+            }
             background: var(--color-#{$c}-2);
 
             &:hover {
@@ -215,6 +219,13 @@ class Button extends Component {
     `
   ]
 
+  #empty = true
+
+  fixStyle() {
+    this.#empty = this.$refs.cont?.assignedNodes().length === 0
+    this.$requestUpdate()
+  }
+
   created() {
     this.stamp = 0
 
@@ -241,13 +252,15 @@ class Button extends Component {
     if (this.autofocus) {
       nextTick(_ => this.$refs.btn.focus())
     }
+    nextTick(_ => this.fixStyle())
   }
 
   render() {
+    let style = styleMap({ 'margin-right': this.#empty ? 0 : '4px' })
     return html`
       <button ref="btn" disabled=${this.disabled}>
-        <wc-icon class="icon" name=${this.icon}></wc-icon>
+        <wc-icon class="icon" name=${this.icon} style=${style}></wc-icon>
-        <slot></slot>
+        <slot ref="cont"></slot>
       </button>
     `
   }

src/pager/index.js

@@ -0,0 +1,316 @@
+/**
+ * {}
+ * @author yutent<yutent.io@gmail.com>
+ * @date 2023/04/18 09:38:01
+ */
+
+import { css, html, Component, bind, styleMap } from '@bd/core'
+import '../form/button.js'
+
+const LAYOUT_DICT = {
+  home: e =>
+    html`<wc-button
+      solid
+      type="plain"
+      data-act="1"
+      disabled=${e}
+      class="item"
+      icon="dbl-left"
+    ></wc-button>`,
+  end: e =>
+    html`<wc-button
+      solid
+      type="plain"
+      data-act="end"
+      disabled=${e}
+      class="item"
+      icon="dbl-right"
+    ></wc-button>`,
+  prev: e =>
+    html`<wc-button
+      solid
+      type="plain"
+      data-act="prev"
+      disabled=${e}
+      class="item"
+      icon="left"
+    ></wc-button>`,
+  next: e =>
+    html`<wc-button
+      solid
+      type="plain"
+      data-act="next"
+      disabled=${e}
+      class="item"
+      icon="right"
+    ></wc-button>`,
+  curr: n => html`<span class="curr item">${n}</span>`,
+  info: (t, p) => html`<span class="item">共 ${t}条, ${p}页</span>`,
+  jump(n) {
+    return html`<section class="item jump">
+      <span>Go to</span>
+      <input ref="input" @keydown=${this.gotoPage} maxlength="6" value=${n} />
+    </section>`
+  }
+}
+
+// 计算页码
+function calculate(curr, total) {
+  var arr = []
+  var fixed = 0
+  var half = curr < 3 ? 6 - curr : 2 // 中间页码
+
+  // 总页码小于2
+  if (total < 2) {
+    arr.push({ to: curr, txt: curr })
+    return arr
+  }
+
+  // 当前页面比半数多时, 前面的用省略号代替
+  if (curr - half > 1 && total > 5) {
+    var to = curr - 2 * half
+    to = to < 1 ? 1 : to
+    arr.push({ to, txt: '...' })
+  }
+
+  if (total - curr < half) {
+    fixed = half - total + curr
+  }
+
+  // 把页码拆成2部分来
+  for (var i = curr - half - fixed; i < curr + half + 1 && i <= total; i++) {
+    if (i > 0) {
+      arr.push({ to: i, txt: i })
+    }
+  }
+
+  // 总页码太多时, 以省略号代替
+  if (curr + half < total) {
+    var to = curr + 2 * half
+    to = to > total ? total : to
+    arr.push({ to, txt: '...' })
+  }
+
+  return arr
+}
+
+class Pager extends Component {
+  static props = {
+    layout: {
+      type: String,
+      default: 'home, prev, pages, next, end',
+      attribute: false
+    },
+    total: {
+      type: Number,
+      default: 0,
+      attribute: false,
+      observer(v) {
+        if (this.#mounted) {
+          this.totalpage = Math.ceil(v / this.pagesize)
+        }
+      }
+    },
+    totalpage: {
+      type: Number,
+      default: 1,
+      attribute: false,
+      observer(v) {
+        if (this.page > v) {
+          this.page = v
+        }
+      }
+    },
+    page: {
+      type: Number,
+      default: 1,
+      attribute: false,
+      observer(v) {
+        if (v > this.totalpage) {
+          this.page = this.totalpage
+        } else if (v < 1) {
+          this.page = 1
+        }
+      }
+    },
+    pagesize: {
+      type: Number,
+      default: 20,
+      attribute: false,
+      observer(v) {
+        if (this.total > 0) {
+          this.totalpage = Math.ceil(this.total / v)
+        }
+      }
+    }
+  }
+
+  static styles = [
+    css`
+      :host {
+        display: block;
+        line-height: 1;
+        font-size: 14px;
+        user-select: none;
+        -moz-user-select: none;
+        color: var(--color-dark-1);
+
+        .layout {
+          display: flex;
+          justify-content: center;
+          align-items: center;
+          margin: 10px auto;
+        }
+
+        .item {
+          min-width: 32px;
+          width: auto;
+          --padding: 0;
+          margin: 0 5px;
+          --icon-size: 12px;
+          border-radius: 4px;
+
+          &.curr {
+            display: inline-flex;
+            align-items: center;
+            justify-content: center;
+            height: 32px;
+            background: var(--color-teal-1);
+            color: #fff;
+          }
+
+          &.jump {
+            display: flex;
+            align-items: center;
+          }
+
+          &[size='l'] {
+            --icon-size: 12px;
+          }
+        }
+
+        input {
+          width: 48px;
+          height: 24px;
+          padding: 0 4px;
+          margin-left: 4px;
+          border: 1px solid var(--color-grey-2);
+          border-radius: 3px;
+          text-align: center;
+          outline: none;
+          transition: box-shadow 0.15s linear;
+
+          &:focus {
+            box-shadow: 0 0 0 2px var(--color-plain-a);
+          }
+        }
+      }
+    `,
+
+    css``
+  ]
+
+  #mounted = false
+
+  handleBtnClick(ev) {
+    let elem = ev.target
+    if (elem.tagName === 'WC-BUTTON') {
+      let { page, totalpage } = this
+      let num = elem.dataset.act
+
+      if (elem.disabled) {
+        return
+      }
+
+      switch (num) {
+        case 'prev':
+          num = page - 1
+          break
+
+        case 'next':
+          console.log(num, page)
+          num = page + 1
+          break
+
+        case 'end':
+          num = totalpage
+          break
+      }
+
+      if (+num === page) {
+        return
+      }
+
+      this.page = num
+
+      this.$emit('page-changed', { data: num })
+    }
+  }
+
+  gotoPage(ev) {
+    if (ev.keyCode === 13) {
+      let n = +ev.target.value
+      if (n === n) {
+        this.page = n
+        this.$emit('page-changed', { data: this.page })
+      }
+      ev.target.value = this.page
+    }
+  }
+
+  mounted() {
+    this.#mounted = true
+  }
+
+  render() {
+    let layout = this.layout.split(',').map(s => s.trim())
+    let { page, total, totalpage } = this
+
+    return html`
+      <div class="layout" @click=${this.handleBtnClick}>
+        ${layout.map(n => {
+          switch (n) {
+            case 'pages':
+              return calculate(page, totalpage).map(it =>
+                page === it.to
+                  ? LAYOUT_DICT.curr(page)
+                  : html`<wc-button
+                      type="plain"
+                      solid
+                      class="item"
+                      data-act="${it.to}"
+                      >${it.txt}</wc-button
+                    >`
+              )
+
+            case 'home':
+              return LAYOUT_DICT.home(page === 1)
+
+            case 'prev':
+              return LAYOUT_DICT.prev(page === 1)
+
+            case 'next':
+              return LAYOUT_DICT.next(page >= totalpage)
+
+            case 'end':
+              return LAYOUT_DICT.end(page >= totalpage)
+
+            case 'curr':
+              return LAYOUT_DICT.curr(page)
+
+            case 'info':
+              return LAYOUT_DICT.info(total, totalpage)
+
+            case 'jump':
+              return LAYOUT_DICT.jump.call(this, page)
+
+            default:
+              return ''
+          }
+        })}
+      </div>
+    `
+  }
+}
+
+Pager.reg('pager')