1 | <template>
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2 | <div class="main-page-root">
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3 | <edit-page v-if="showEditor" class="image-editor" :src="imageUrl" :imageBuffer="imageBuffer"
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4 | @closeAndDiscard="onEditorCloseRequested" @closeAndSave="onEditorSave" />
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5 |
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6 | <div class="paper root-container" :class="{ 'root-container-image-state': imageUrl !== null }">
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7 | <div v-if="imageUrl === null" class="upload-area" @click="uploadFile">
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8 | <span class="heading1">{{ translations.get("Title") }}</span>
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9 | <span class="material-icons mdi-xl">upload_file</span>
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10 | <span>{{ translations.get("MainPage_Upload") }}</span>
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11 | </div>
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12 |
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13 | <div v-if="imageUrl !== null" class="image-area">
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14 | <div class="controls">
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15 | <button class="btn-primary" @click="doOcr" :disabled="ocrInProgress">
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16 | <span class="material-icons">play_arrow</span>
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17 | <span>{{ translations.get("MainPage_PerformOCR") }}</span>
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18 | </button>
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19 |
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20 | <button class="btn-primary" @click="showEditor = true" :disabled="ocrInProgress">
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21 | <span class="material-icons">edit</span>
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22 | <span>{{ translations.get("MainPage_EditImage") }}</span>
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23 | </button>
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24 |
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25 | <button class="btn-primary" @click="reset" :disabled="ocrInProgress">
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26 | <span class="material-icons">restart_alt</span>
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27 | <span>{{ translations.get("MainPage_NewImage") }}</span>
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28 | </button>
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29 |
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30 | <div v-if="ocrInProgress" class="progress-bar-container">
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31 | <div class="progress-bar-value progress-bar-indeterminate" />
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32 | </div>
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33 | </div>
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34 |
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35 | <img class="image-display" :src="imageUrl" />
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36 |
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37 | <div class="text-container">
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38 | <pre>{{ ocrResult }}</pre>
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39 | </div>
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40 | </div>
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41 | </div>
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42 |
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43 | <input ref="fileInput" type="file" @input="onFilesChanged" class="hidden"
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44 | accept="image/png,image/jpeg,image/gif,image/bmp,image/tiff,image/webp,application/pdf" />
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45 | </div>
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46 |
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47 | </template>
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48 |
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49 | <style lang="scss" scoped>
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50 | .main-page-root {
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51 | display: flex;
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52 | align-items: center;
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53 | justify-content: center;
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54 | }
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55 |
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56 | .root-container {
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57 | padding: 1em;
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58 | transition-duration: var(--transition-duration);
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59 | }
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60 |
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61 | .root-container-image-state {
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62 | width: calc(100% - 3em);
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63 | height: calc(100vh - 3em);
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64 | max-height: calc(100vh - 3em);
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65 | }
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66 |
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67 | .upload-area {
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68 | display: grid;
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69 | grid-template-columns: auto auto;
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70 | grid-template-rows: auto 1fr;
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71 | align-items: center;
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72 | justify-items: center;
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73 |
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74 | padding: 2em;
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75 | gap: 1em;
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76 |
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77 | font-size: 2rem;
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78 | cursor: pointer;
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79 | border: 3px dashed var(--bg-color);
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80 | border-radius: var(--border-radius);
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81 |
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82 | .heading1 {
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83 | grid-column-start: span 2;
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84 | color: #666;
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85 | }
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86 | }
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87 |
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88 | .hidden {
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89 | display: none;
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90 | }
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91 |
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92 | .image-editor {
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93 | position: absolute;
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94 | height: 100%;
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95 | width: 100%;
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96 | top: 0;
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97 | left: 0;
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98 | z-index: 9;
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99 | }
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100 |
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101 | .image-area {
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102 | display: grid;
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103 | grid-template-columns: 1fr 1fr;
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104 | grid-template-rows: auto 1fr;
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105 | height: 100%;
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106 |
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107 | gap: 1rem;
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108 | align-items: center;
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109 | justify-items: center;
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110 |
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111 | position: relative;
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112 | overflow: hidden;
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113 |
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114 | .text-container {
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115 | height: 100%;
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116 | width: 100%;
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117 | }
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118 | }
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119 |
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120 | .image-display {
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121 | border: 1px solid #444;
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122 | max-width: 100%;
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123 | max-height: 80vh;
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124 | object-fit: contain;
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125 | }
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126 |
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127 | .controls {
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128 | display: flex;
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129 | gap: 1em;
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130 | grid-column-start: span 2;
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131 | }
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132 |
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133 | .text-container {
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134 | overflow: scroll;
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135 | }
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136 | </style>
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137 |
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138 | <script>
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139 | import { mapState } from "vuex";
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140 | import EditPage from "./EditPage.vue";
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141 | import OcrService, { OcrOptions } from "../js/OcrService"
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142 | import { log } from "../js/Util";
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143 |
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144 | const ocrService = new OcrService();
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145 |
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146 | export default {
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147 | name: "MainPage",
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148 | components: {
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149 | EditPage
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150 | },
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151 | data() {
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152 | return {
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153 | imageType: null,
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154 | /** @type {ArrayBuffer} */
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155 | imageBuffer: null,
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156 | imageUrl: null,
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157 | ocrInProgress: false,
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158 | ocrResult: null,
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159 | showEditor: false
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160 | }
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161 | },
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162 | computed: {
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163 | ...mapState({
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164 | translations: state => state.translations
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165 | })
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166 | },
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167 | watch: {
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168 | imageBuffer(newValue) {
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169 | if (this.imageUrl !== null) {
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170 | URL.revokeObjectURL(this.imageUrl);
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171 | }
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172 |
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173 | if (newValue === null) {
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174 | return;
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175 | }
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176 |
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177 | const arrayView = new Uint8Array(newValue);
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178 | const blob = new Blob([ arrayView ]);
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179 | this.imageUrl = URL.createObjectURL(blob);
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180 | }
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181 | },
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182 | methods: {
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183 | uploadFile() {
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184 | this.$refs.fileInput.click();
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185 | },
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186 | async onFilesChanged() {
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187 | /** @type {File[]} */
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188 | const files = this.$refs.fileInput.files;
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189 | if (files === null || files === undefined || files.length !== 1) {
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190 | return;
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191 | }
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192 |
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193 | this.imageBuffer = await files[0].arrayBuffer();
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194 | this.imageType = files[0].type;
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195 | },
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196 |
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197 | async doOcr() {
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198 | try {
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199 | this.ocrInProgress = true;
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200 |
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201 | const arrayView = new Uint8Array(this.imageBuffer);
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202 | const imageBlob = new Blob([ arrayView ], { type: this.imageType });
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203 |
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204 | const result = await ocrService.run([
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205 | {
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206 | image: imageBlob,
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207 | fileName: "file.png",
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208 | options: new OcrOptions(false)
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209 | }
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210 | ]);
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211 |
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212 | this.ocrResult = result[0].text;
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213 | }
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214 | catch (ex) {
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215 | // TODO: Display error
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216 | log("Failed to perform OCR", "error");
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217 | log(ex, "error");
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218 | }
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219 | finally {
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220 | this.ocrInProgress = false;
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221 | }
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222 | },
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223 |
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224 | onEditorCloseRequested() {
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225 | this.showEditor = false;
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226 | },
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227 | /**
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228 | * Called when the editor is saved in order to update the stored image buffer.
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229 | * @param {Buffer} newBuffer The updated image buffer.
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230 | * @param {String} newType The updated MIME type of the image buffer.
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231 | */
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232 | onEditorSave(newBuffer, newType) {
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233 | this.imageBuffer = newBuffer.buffer;
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234 | this.imageType = newType;
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235 |
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236 | this.onEditorCloseRequested();
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237 | },
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238 |
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239 | reset() {
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240 | URL.revokeObjectURL(this.imageUrl);
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241 | this.imageUrl = null;
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242 | this.ocrInProgress = false;
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243 | this.ocrResult = null;
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244 | this.showEditor = false;
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245 | this.$refs.fileInput.value = "";
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246 | }
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247 | }
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248 | }
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249 | </script>
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