From 9850decf24c32dde04f442e95605020add712ab2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Ml=C3=A1dek?= <t@mldk.cz>
Date: Wed, 15 Jul 2020 22:00:19 +0200
Subject: [PATCH] initial commit

---
 src/App.vue                   |  40 ++++---
 src/collages.ts               | 129 +++++++++++++++++++++++
 src/components/Collage.vue    | 190 ++++++++++++++++++++++++++++++++++
 src/components/HelloWorld.vue |  58 -----------
 src/components/Picker.vue     |  90 ++++++++++++++++
 src/types.d.ts                |  11 ++
 src/utils.ts                  |  19 ++++
 7 files changed, 463 insertions(+), 74 deletions(-)
 create mode 100644 src/collages.ts
 create mode 100644 src/components/Collage.vue
 delete mode 100644 src/components/HelloWorld.vue
 create mode 100644 src/components/Picker.vue
 create mode 100644 src/types.d.ts
 create mode 100644 src/utils.ts

diff --git a/src/App.vue b/src/App.vue
index bfc4cad..6712951 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,29 +1,37 @@
 <template>
-  <div id="app">
-    <img alt="Vue logo" src="./assets/logo.png">
-    <HelloWorld msg="Welcome to Your Vue.js + TypeScript App"/>
-  </div>
+<div id="app">
+    <picker @images="images = $event"/>
+    <collage :images="images"/>
+</div>
 </template>
 
 <script lang="ts">
-import { Component, Vue } from 'vue-property-decorator';
-import HelloWorld from './components/HelloWorld.vue';
+import {Component, Vue} from "vue-property-decorator";
+import Picker from "@/components/Picker.vue";
+import Collage from "@/components/Collage.vue";
 
 @Component({
-  components: {
-    HelloWorld,
-  },
+    components: {
+        Picker,
+        Collage
+    },
 })
-export default class App extends Vue {}
+export default class App extends Vue {
+    private images: ImageBitmap[] = [];
+}
 </script>
 
 <style>
+html, body {
+    margin: 0 2em;
+    padding: 0;
+}
+
 #app {
-  font-family: Avenir, Helvetica, Arial, sans-serif;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-  text-align: center;
-  color: #2c3e50;
-  margin-top: 60px;
+    font-family: monospace;
+    display: flex;
+    flex-direction: column;
+    justify-content: space-evenly;
+    min-height: 100vh;
 }
 </style>
diff --git a/src/collages.ts b/src/collages.ts
new file mode 100644
index 0000000..64ad7cc
--- /dev/null
+++ b/src/collages.ts
@@ -0,0 +1,129 @@
+import {CollageMode} from "@/types";
+import {randint, shuffle} from "@/utils";
+
+const collageModeType = ["grid", "row", "irow", "col", "icol"] as const;
+export type CollageModeType = typeof collageModeType[number];
+
+function cleanDraw(ctx: CanvasRenderingContext2D, image: ImageBitmap,
+                   x: number, y: number, w: number, h: number) {
+    const scaleRatio = Math.max(w / image.width, h / image.height);
+    ctx.drawImage(image,
+      image.width / 2 - w / scaleRatio / 2, image.height / 2 - h / scaleRatio / 2,
+      w / scaleRatio, h / scaleRatio,
+      x - w / 2, y - h / 2,
+      w, h);
+}
+
+const modes: { [key in CollageModeType]: CollageMode } = {
+    "grid": {
+        name: "Regular Grid",
+        minImages: 4,
+        forceConfig: {
+            numImages: 4
+        },
+        place: (ctx, images, config) => {
+            const quadrantSize = [ctx.canvas.width / 2, ctx.canvas.height / 2];
+            const selectedImages = shuffle(images).slice(0, 4);
+            shuffle(selectedImages.map((image, idx) => [image, idx] as [ImageBitmap, number]))
+              .forEach(([image, idx]) => {
+                  let x!: number, y!: number;
+                  switch (idx) {
+                      case 0:
+                          x = ctx.canvas.width * .25;
+                          y = ctx.canvas.height * .25;
+                          break;
+                      case 1:
+                          x = ctx.canvas.width * .75;
+                          y = ctx.canvas.height * .25;
+                          break;
+                      case 2:
+                          x = ctx.canvas.width * .25;
+                          y = ctx.canvas.height * .75;
+                          break;
+                      case 3:
+                          x = ctx.canvas.width * .75;
+                          y = ctx.canvas.height * .75;
+                          break;
+                  }
+                  if (config.cleanCrops) {
+                      cleanDraw(ctx, image, x, y, quadrantSize[0], quadrantSize[1]);
+                  } else {
+                      const scaleRatio = Math.max(quadrantSize[0] / image.width, quadrantSize[1] / image.height);
+                      ctx.drawImage(image,
+                        x - (image.width * scaleRatio / 2), y - (image.height * scaleRatio / 2),
+                        image.width * scaleRatio, image.height * scaleRatio);
+                  }
+              });
+        }
+    },
+    "row": {
+        name: "Regular Row",
+        minImages: 2,
+        forceConfig: {
+            cleanCrops: true
+        },
+        place: (ctx, images, config) => {
+            const selectedImages = shuffle(images).slice(0, config.numImages || randint(4) + 2);
+            const quadrantSize = [ctx.canvas.width / selectedImages.length, ctx.canvas.height];
+            selectedImages.forEach((image, idx) => {
+                const x = idx * quadrantSize[0] + quadrantSize[0] / 2;
+                const y = quadrantSize[1] / 2;
+                cleanDraw(ctx, image, x, y, quadrantSize[0], quadrantSize[1]);
+            });
+        }
+    },
+    "irow": {
+        name: "Irregular Row",
+        minImages: 2,
+        forceConfig: {
+            cleanCrops: true
+        },
+        place: (ctx, images, config) => {
+            const selectedImages = shuffle(images).slice(0, config.numImages || randint(4) + 2);
+            const quadrantSize = [ctx.canvas.width / selectedImages.length, ctx.canvas.height];
+            selectedImages.forEach((image, idx) => {
+                const x = idx * quadrantSize[0] + quadrantSize[0] / 2;
+                const y = quadrantSize[1] / 2;
+                const w = Math.min(ctx.canvas.width / 2,
+                  quadrantSize[1] + Math.random() * (quadrantSize[1] - (quadrantSize[1] / image.height) * image.width));
+                cleanDraw(ctx, image, x, y, w, quadrantSize[1]);
+            });
+        }
+    },
+    "col": {
+        name: "Regular Column",
+        minImages: 2,
+        forceConfig: {
+            cleanCrops: true
+        },
+        place: (ctx, images, config) => {
+            const selectedImages = shuffle(images).slice(0, config.numImages || randint(4) + 2);
+            const quadrantSize = [ctx.canvas.width, ctx.canvas.height / selectedImages.length];
+            selectedImages.forEach((image, idx) => {
+                const x = quadrantSize[0] / 2;
+                const y = idx * quadrantSize[1] + quadrantSize[1] / 2;
+                cleanDraw(ctx, image, x, y, quadrantSize[0], quadrantSize[1]);
+            });
+        }
+    },
+    "icol": {
+        name: "Irregular Column",
+        minImages: 2,
+        forceConfig: {
+            cleanCrops: true
+        },
+        place: (ctx, images, config) => {
+            const selectedImages = shuffle(images).slice(0, config.numImages || randint(4) + 2);
+            const quadrantSize = [ctx.canvas.width, ctx.canvas.height / selectedImages.length];
+            selectedImages.forEach((image, idx) => {
+                const x = quadrantSize[0] / 2;
+                const y = idx * quadrantSize[1] + quadrantSize[1] / 2;
+                const h = Math.min(ctx.canvas.height / 2,
+                  quadrantSize[0] + Math.random() * (quadrantSize[0] - (quadrantSize[0] / image.width) * image.height));
+                cleanDraw(ctx, image, x, y, quadrantSize[0], h);
+            });
+        },
+    },
+};
+
+export default modes;
diff --git a/src/components/Collage.vue b/src/components/Collage.vue
new file mode 100644
index 0000000..26bdf98
--- /dev/null
+++ b/src/components/Collage.vue
@@ -0,0 +1,190 @@
+<template>
+<div class="collage">
+    <div class="canvas">
+        <canvas id="canvas" ref="canvas" :width="canvas.width" :height="canvas.height"></canvas>
+        <div class="canvas-size">
+            <label>
+                Width:
+                <input type="number" step="16" min="128" v-model="canvas.width">
+            </label>
+            <label>
+                Height:
+                <input type="number" step="16" min="128" v-model="canvas.height">
+            </label>
+        </div>
+    </div>
+    <div class="controls">
+        <div class="modes">
+            <label v-for="(mode, idx) in modes"
+                   :class="{disabled: images.length < mode.minImages,
+                            selected: idx === currentModeType,
+                            lastActive: idx === lastActiveModeType}">
+                {{mode.name}} ({{mode.minImages}})
+                <input type="radio" :value="idx" v-model="currentModeType">
+            </label>
+        </div>
+        <button :disabled="images.length < currentMode.minImages" @click="renderCollage">REPAINT</button>
+        <hr>
+        <div class="config">
+            <label class="config-numimages">
+                #N of images:
+                <input type="number" :min="currentMode.minImages" :max="images.length"
+                       placeholder="RND"
+                       :disabled="Object.keys(forceConfig).includes('numImages')"
+                       v-model="forceConfig.numImages || collageConfig.numImages">
+            </label>
+            <label>
+                <input type="checkbox"
+                       :disabled="Object.keys(forceConfig).includes('cleanCrops')"
+                       v-model="forceConfig.cleanCrops || collageConfig.cleanCrops">
+                Crop cleanly
+            </label>
+        </div>
+    </div>
+</div>
+</template>
+
+<script lang="ts">
+import {Component, Prop, Vue, Watch} from "vue-property-decorator";
+import collageModes, {CollageModeType} from "../collages";
+import {CollageConfig, CollageMode} from "@/types";
+
+type DisplayCollageModeType = CollageModeType | & "shuffle";
+
+@Component
+export default class Collage extends Vue {
+    @Prop({required: true}) private images!: ImageBitmap[];
+    private context!: CanvasRenderingContext2D;
+    private canvas = {
+        width: 640,
+        height: 640
+    };
+    private collageConfig: CollageConfig = {
+        numImages: undefined,
+        cleanCrops: false
+    };
+    private currentModeType: DisplayCollageModeType = "shuffle";
+    private lastActiveModeType: DisplayCollageModeType | null = null;
+    private modes: { [key in DisplayCollageModeType]: CollageMode } = {
+        ...collageModes,
+        "shuffle": {
+            name: "Shuffle all!",
+            minImages: Math.min(...Object.values(collageModes).map(m => m.minImages)),
+            place: (ctx, images, config) => {
+                const permissibleModeKeys = Object.keys(collageModes)
+                  .filter(k => collageModes[k as CollageModeType].minImages <= images.length) as CollageModeType[];
+                const randomModeType = permissibleModeKeys[Math.floor(Math.random() * permissibleModeKeys.length)];
+                const randomMode = collageModes[randomModeType];
+                this.setLastActiveModeType(randomModeType);
+                randomMode.place(ctx, images, config);
+            }
+        }
+    };
+
+    // wtf vue?
+    private setLastActiveModeType(lastActiveModeType: any) {
+        this.lastActiveModeType = lastActiveModeType;
+    }
+
+    private get currentMode() {
+        return this.modes[this.currentModeType];
+    }
+
+    private get lastMode() {
+        return this.lastActiveModeType ? this.modes[this.lastActiveModeType] : undefined;
+    }
+
+    private get forceConfig() {
+        return this.lastMode ? this.lastMode.forceConfig || {} : {};
+    }
+
+
+    private mounted() {
+        const canvas = (this.$refs.canvas as HTMLCanvasElement);
+        this.context = canvas.getContext("2d") as CanvasRenderingContext2D;
+    }
+
+    @Watch("images")
+    @Watch("currentMode")
+    @Watch("collageConfig", {deep: true})
+    private renderCollage() {
+        if (this.images.length >= this.currentMode.minImages) {
+            this.lastActiveModeType = this.currentModeType;
+            this.currentMode.place(this.context, this.images, this.collageConfig);
+        }
+    }
+}
+</script>
+
+<!-- Add "scoped" attribute to limit CSS to this component only -->
+<style scoped>
+.collage {
+    margin: 2rem;
+    display: flex;
+    justify-content: space-evenly;
+    align-items: center;
+}
+
+.canvas {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+}
+
+#canvas {
+    border: 1px solid black;
+}
+
+.canvas-size {
+    margin: 1rem;
+}
+
+.controls button {
+    width: 100%;
+}
+
+.modes {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+}
+
+.controls label {
+    font-size: 14pt;
+    cursor: pointer;
+    margin: .25rem;
+}
+
+.modes input {
+    display: none;
+}
+
+.controls button, .controls hr, .controls .config {
+    margin-top: 1rem;
+}
+
+.controls .config {
+    user-select: none;
+}
+
+.config label {
+    display: block;
+}
+
+.config-numimages input {
+    width: 4em;
+}
+
+.disabled {
+    color: gray;
+    pointer-events: none;
+}
+
+.selected {
+    font-weight: bold;
+}
+
+.lastActive {
+    text-decoration: underline;
+}
+</style>
diff --git a/src/components/HelloWorld.vue b/src/components/HelloWorld.vue
deleted file mode 100644
index 0cf3cc3..0000000
--- a/src/components/HelloWorld.vue
+++ /dev/null
@@ -1,58 +0,0 @@
-<template>
-  <div class="hello">
-    <h1>{{ msg }}</h1>
-    <p>
-      For a guide and recipes on how to configure / customize this project,<br>
-      check out the
-      <a href="https://cli.vuejs.org" target="_blank" rel="noopener">vue-cli documentation</a>.
-    </p>
-    <h3>Installed CLI Plugins</h3>
-    <ul>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-babel" target="_blank" rel="noopener">babel</a></li>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-typescript" target="_blank" rel="noopener">typescript</a></li>
-    </ul>
-    <h3>Essential Links</h3>
-    <ul>
-      <li><a href="https://vuejs.org" target="_blank" rel="noopener">Core Docs</a></li>
-      <li><a href="https://forum.vuejs.org" target="_blank" rel="noopener">Forum</a></li>
-      <li><a href="https://chat.vuejs.org" target="_blank" rel="noopener">Community Chat</a></li>
-      <li><a href="https://twitter.com/vuejs" target="_blank" rel="noopener">Twitter</a></li>
-      <li><a href="https://news.vuejs.org" target="_blank" rel="noopener">News</a></li>
-    </ul>
-    <h3>Ecosystem</h3>
-    <ul>
-      <li><a href="https://router.vuejs.org" target="_blank" rel="noopener">vue-router</a></li>
-      <li><a href="https://vuex.vuejs.org" target="_blank" rel="noopener">vuex</a></li>
-      <li><a href="https://github.com/vuejs/vue-devtools#vue-devtools" target="_blank" rel="noopener">vue-devtools</a></li>
-      <li><a href="https://vue-loader.vuejs.org" target="_blank" rel="noopener">vue-loader</a></li>
-      <li><a href="https://github.com/vuejs/awesome-vue" target="_blank" rel="noopener">awesome-vue</a></li>
-    </ul>
-  </div>
-</template>
-
-<script lang="ts">
-import { Component, Prop, Vue } from 'vue-property-decorator';
-
-@Component
-export default class HelloWorld extends Vue {
-  @Prop() private msg!: string;
-}
-</script>
-
-<!-- Add "scoped" attribute to limit CSS to this component only -->
-<style scoped>
-h3 {
-  margin: 40px 0 0;
-}
-ul {
-  list-style-type: none;
-  padding: 0;
-}
-li {
-  display: inline-block;
-  margin: 0 10px;
-}
-a {
-  color: #42b983;
-}
-</style>
diff --git a/src/components/Picker.vue b/src/components/Picker.vue
new file mode 100644
index 0000000..4a54527
--- /dev/null
+++ b/src/components/Picker.vue
@@ -0,0 +1,90 @@
+<template>
+<div class="picker">
+    <div class="images">
+        <!--suppress HtmlUnknownTarget -->
+        <img v-for="file in files" :alt="file.name" :src="dataURLs[file.name]" @click="confirmDelete(file)"/>
+    </div>
+    <input class="browse" type="file" accept="image/*" multiple @change="loadImages($event)">
+</div>
+</template>
+
+<script lang="ts">
+import {Component, Vue, Watch} from "vue-property-decorator";
+
+@Component
+export default class Picker extends Vue {
+    private files: File[] = [];
+    private dataURLs: { [key: string]: string } = {};
+    private bitmaps: { [key: string]: ImageBitmap } = {};
+
+    private loadImages(event: Event) {
+        Object.values(this.dataURLs).forEach((url) => {
+            URL.revokeObjectURL(url);
+        });
+        this.dataURLs = {};
+
+        this.files = Array.from((event.target as HTMLInputElement).files || []);
+        this.files.forEach((file: File) => {
+            this.dataURLs[file.name] = URL.createObjectURL(file);
+        });
+
+        const bitmapPromises: Promise<[string, ImageBitmap]>[] =
+          Object.entries(this.dataURLs).map(([filename, url]) => {
+              return new Promise((resolve) => {
+                  const image = new Image();
+                  image.onload = () => {
+                      createImageBitmap(image).then((bitmap) => {
+                          resolve([filename, bitmap]);
+                      });
+                  };
+                  image.src = url;
+              });
+          });
+
+        Promise.all(bitmapPromises).then((bitmaps) => {
+            bitmaps.forEach(([filename, bitmap]) => {
+                this.bitmaps[filename] = bitmap;
+            });
+            this.$emit("images", Object.values(this.bitmaps));
+        });
+    }
+
+    private confirmDelete(file: File) {
+        if (window.confirm(`Remove ${file.name}?`)) {
+            this.files.splice(this.files.indexOf(file), 1);
+            URL.revokeObjectURL(this.dataURLs[file.name]);
+            delete this.dataURLs[file.name];
+            delete this.bitmaps[file.name];
+
+            this.$emit("images", Object.values(this.bitmaps));
+        }
+    }
+}
+</script>
+
+<!-- Add "scoped" attribute to limit CSS to this component only -->
+<style scoped>
+.picker {
+    border: 1px solid black;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+}
+
+.images {
+    min-height: 120px;
+    display: flex;
+    overflow-x: scroll;
+}
+
+.images img {
+    height: 120px;
+    margin: .5rem;
+    cursor: pointer;
+}
+
+.browse {
+    min-width: 16em;
+    margin: 2em;
+}
+</style>
diff --git a/src/types.d.ts b/src/types.d.ts
new file mode 100644
index 0000000..04695d0
--- /dev/null
+++ b/src/types.d.ts
@@ -0,0 +1,11 @@
+export interface CollageMode {
+    name: string;
+    minImages: number;
+    place: (ctx: CanvasRenderingContext2D, images: ImageBitmap[], config: CollageConfig) => void;
+    forceConfig?: CollageConfig;
+}
+
+export interface CollageConfig {
+    numImages?: number;
+    cleanCrops?: boolean;
+}
diff --git a/src/utils.ts b/src/utils.ts
new file mode 100644
index 0000000..b50d3b6
--- /dev/null
+++ b/src/utils.ts
@@ -0,0 +1,19 @@
+/**
+ * Shuffles array in place.
+ * @param {Array} a items An array containing the items.
+ */
+export function shuffle<T>(a: T[]): T[] {
+    let j, x, i;
+    let b = Array.from(a);
+    for (i = b.length - 1; i > 0; i--) {
+        j = Math.floor(Math.random() * (i + 1));
+        x = b[i];
+        b[i] = b[j];
+        b[j] = x;
+    }
+    return b;
+}
+
+export function randint(n: number) {
+    return Math.floor(Math.random() * n);
+}