functional md button and icon with ripple effect and classbuilder helper

packages/materialdesign-components/src/Button.svelte

@@ -1,39 +0,0 @@
-<script>
-  import "@material/button/mdc-button.scss";
-  import "@material/button/_mixins.scss";
-
-  //TODO: How does theme color work for this?
-  //TODO: Add action for ripple
-  //TODO: Create class builder class or fn
-
-  /* 
-    ==BLOCK MODIFIERS==
-    raised = via variant prop
-    outlined = via variant prop
-    unelevated = via variant prop
-    touch = needs accessibility wrapper div
-   */
-
-  export let text = "";
-
-  //Either raised,outlined or unelevated
-  export let variant = "raised";
-  export let colour = "primary";
-  export let disabled = false; //added directly to button element (not in class)
-  export let icon = "";
-  export let trailingIcon = false;
-
-  $: renderLeadingIcon = !!icon && !trailingIcon;
-  $: renderTrailingIcon = !!icon && trailingIcon;
-</script>
-
-<button class="mdc-button" {disabled}>
-  <div class="mdc-button__ripple" />
-  {#if renderLeadingIcon}
-    <i class="material-icons mdc-button__icon" aria-hidden="true">{icon}</i>
-  {/if}
-  <span class="mdc-button__label">{text}</span>
-  {#if renderTrailingIcon}
-    <i class="material-icons mdc-button__icon" aria-hidden="true">{icon}</i>
-  {/if}
-</button>

packages/materialdesign-components/src/Button/Button.svelte

@@ -0,0 +1,60 @@
+<script>
+  import { setContext, getContext } from "svelte";
+  import Icon from "../Icon.svelte";
+  import ripple from "../Ripple.js";
+  import ClassBuilder from "../ClassBuilder.js";
+
+  const cb = new ClassBuilder("button", ["primary", "medium"]);
+
+  export let variant = "raised";
+  export let colour = "primary";
+  export let size = "medium";
+
+  export let href = "";
+  export let icon = "";
+  export let trailingIcon = false;
+  export let fullBleed = false;
+
+  export let text = "";
+  export let disabled = false;
+
+  $: if (!!icon) {
+    setContext("BBMD:icon:context", "button");
+  }
+
+  $: renderLeadingIcon = !!icon && !trailingIcon;
+  $: renderTrailingIcon = !!icon && trailingIcon;
+
+  let blockClasses = cb.blocks({
+    modifiers: !href ? [variant] : null,
+    customs: { size, colour }
+  });
+</script>
+
+<style>
+  .fullBleed {
+    width: 100%;
+  }
+</style>
+
+<!-- TODO: Activated colour on primary elevated buttons seems to be rendering weird  -->
+{#if href}
+  <a class={blockClasses} {href} on:click>
+    <span class={cb.elements('label')}>{text}</span>
+  </a>
+{:else}
+  <button
+    use:ripple={{ colour }}
+    class={blockClasses}
+    class:fullBleed
+    {disabled}
+    on:click>
+    {#if renderLeadingIcon}
+      <Icon {icon} />
+    {/if}
+    <span class={cb.elements('label')}>{text}</span>
+    {#if renderTrailingIcon}
+      <Icon {icon} />
+    {/if}
+  </button>
+{/if}

packages/materialdesign-components/src/Button/_index.scss

@@ -0,0 +1,5 @@
+@import "@material/button/mdc-button.scss";
+@import "@material/ripple/mdc-ripple.scss";
+@import "./mixins.scss";
+
+@include bbmd-button-styles();

packages/materialdesign-components/src/Button/_mixins.scss

@@ -0,0 +1,39 @@
+@import "@material/feature-targeting/functions";
+@import "@material/feature-targeting/mixins";
+
+@mixin bbmd-button-styles($query: mdc-feature-all()) {
+  $feat-structure: mdc-feature-create-target($query, structure);
+
+  .bbmd-mdc-button--size-large {
+    @include button-sizing($feat-structure, 21px, 40px, 15px);
+  }
+
+  .bbmd-mdc-button--size-small {
+    @include button-sizing($feat-structure, 9px, 32px, 13px);
+  }
+
+  .bbmd-mdc-button--colour-secondary {
+    //no feature target as relying on theme variable custom property
+    @include mdc-button-ink-color(secondary);
+
+    &.mdc-button--raised,
+    &.mdc-button--unelevated {
+      @include mdc-button-container-fill-color(secondary);
+      @include mdc-button-ink-color(on-secondary);
+    }
+
+    &.mdc-button--outlined {
+      @include mdc-button-outline-color(secondary);
+    }
+  }
+}
+
+@mixin button-sizing($feat, $padding, $height, $fontSize) {
+  @include mdc-feature-targets($feat) {
+    padding: 0px $padding;
+    height: $height;
+  }
+  > .mdc-button__label {
+    font-size: $fontSize;
+  }
+}

packages/materialdesign-components/src/Button/index.js

@@ -0,0 +1,2 @@
+import "./_index.scss";
+export { default as button } from "./Button.svelte";

packages/materialdesign-components/src/ClassBuilder.js

@@ -1,6 +1,38 @@
 export default class ClassBuilder {
-  block = "";
-  constructor(block) {
+  constructor(block, customDefaults) {
     this.block = `mdc-${block}`;
+    this.customDefaults = customDefaults; //will be ignored when building custom classes
+  }
+
+  // classParams: {modifiers:[] (mdc), custom:[] (bbmd), extra:[] (any)}
+  blocks(classParams) {
+    let base = this.block;
+    if (classParams == undefined) return base;
+    return this.buildClass(base, classParams);
+  }
+
+  //elementName: string, classParams: {}
+  elements(elementName, classParams) {
+    let base = `${this.block}__${elementName}`;
+    if (classParams == undefined) return base;
+    return this.buildClass(base, classParams);
+  }
+
+  buildClass(base, classParams) {
+    let cls = base;
+    const { modifiers, customs, extras } = classParams;
+    if (!!modifiers) cls += modifiers.map(m => ` ${base}--${m}`).join(" ");
+    if (!!customs)
+      cls += Object.entries(customs)
+        .map(([property, value]) => {
+          //disregard falsy and values set by customDefaults constructor param
+          if (!!value && !this.customDefaults.includes(value)) {
+            //custom scss name convention = bbmd-[block | element]--[property]-[value]
+            return ` bbmd-${base}--${property}-${value}`;
+          }
+        })
+        .join("");
+    if (!!extras) cls += ` ${extras.join(" ")}`;
+    return cls.trim();
   }
 }

packages/materialdesign-components/src/Icon.svelte

@@ -0,0 +1,13 @@
+<script>
+  import { getContext } from "svelte";
+
+  export let icon = "";
+
+  let iconContext = getContext("BBMD:icon:context");
+  let cls =
+    iconContext == "button"
+      ? "material-icons mdc-button__icon"
+      : "material-icons";
+</script>
+
+<i class={cls}>{icon}</i>

packages/materialdesign-components/src/Ripple.js

@@ -0,0 +1,28 @@
+import { MDCRipple } from "@material/ripple";
+
+export default function ripple(
+  node,
+  props = { colour: "primary", unbounded: false }
+) {
+  node.classList.add("mdc-ripple-surface");
+  const component = new MDCRipple(node);
+  component.unbounded = props.unbounded;
+
+  if (props.colour === "secondary") {
+    node.classList.remove("mdc-ripple-surface--primary");
+    node.classList.add("mdc-ripple-surface--accent");
+  } else {
+    node.classList.add("mdc-ripple-surface--primary");
+    node.classList.remove("mdc-ripple-surface--accent");
+  }
+
+  return {
+    destroy() {
+      component.destroy();
+      node.classList.remove("mdc-ripple-surface");
+      node.classList.remove("mdc-ripple-surface--primary");
+      node.classList.remove("mdc-ripple-surface--accent");
+      component = null;
+    }
+  };
+}

packages/materialdesign-components/src/Test/props.js

@@ -7,6 +7,19 @@ export const props = {
   button: {
     _component: "@budibase/materialdesign-components/button",
     _children: [],
-    variant: "raised"
+    variant: "raised",
+    colour: "secondary",
+    size: "large",
+    href: "",
+    icon: "alarm_on",
+    trailingIcon: true,
+    fullBleed: false,
+    text: "I am button",
+    disabled: false
+  },
+  icon: {
+    _component: "@budibase/materialdesign-components/icon",
+    _children: [],
+    icon: ""
   }
 };

packages/materialdesign-components/src/Test/testComponents.js

@@ -1,4 +1,4 @@
 import h1 from "../H1.svelte";
-import { button } from "@BBMD";
+import { button, icon } from "@BBMD";
 
-export default { h1, button };
+export default { h1, button, icon };

packages/materialdesign-components/src/index.js

@@ -1,3 +1,3 @@
 export { default as h1 } from "./H1.svelte";
-export { default as button } from "./Button.svelte";
-
+export { default as icon } from "./Icon.svelte";
+export { button } from "./Button";