[WIP] store font-map in appState

src/javascript/components/LoadingView.jsx

@@ -1,4 +1,5 @@
 import React from 'react';
+import FaCheck from 'react-icons/lib/fa/check'
 
 import pdfjs from 'pdfjs-dist'; // eslint-disable-line no-unused-vars
 import { Line } from 'rc-progress';
@@ -6,6 +7,7 @@ import { Line } from 'rc-progress';
 import Page from '../models/Page.jsx';
 import TextItem from '../models/TextItem.jsx';
 
+// Parses the PDF pages and displays progress
 export default class LoadingView extends React.Component {
 
     static propTypes = {
@@ -16,42 +18,78 @@ export default class LoadingView extends React.Component {
     constructor(props) {
         super(props);
         this.state = {
-            parsedPages: 0,
+            pages: [],
-            pages: []
+            fontIds: new Set(),
+            fontMap: new Map(),
+            progress: new Progress({
+                stages: [
+                    new ProgressStage('Parsing PDF Pages'),
+                    new ProgressStage('Parsing Fonts')
+                ]
+            }),
         };
     }
 
-    anounceInitialParse(pages) {
+    announceInitialParse(document) {
+        const pageStage = this.state.progress.stages[0];
+        const numPages = document.numPages;
+        pageStage.steps = numPages;
+        pageStage.stepsDone;
+
+        var pages = [];
+        for (var i = 0; i < numPages; i++) {
+            pages.push(new Page({
+                index: i
+            }));
+        }
+
         this.setState({
-            pages: pages
+            document: document,
+            pages: pages,
         });
     }
 
-    anouncePageParsed(index, textItems) {
+    announcePageParsed(index, textItems) {
-        //TODO might make problems.. concat unordered and order at the end ?
+        const pageStage = this.state.progress.stages[0];
+        const fontStage = this.state.progress.stages[1];
+        textItems.forEach(item => {
+            const fontId = item.font;
+            if (!this.state.fontIds.has(fontId)) {
+                const announceFontFunction = this.announceFontParsed.bind(this);
+                this.state.document.transport.commonObjs.get(fontId, function(font) {
+                    announceFontFunction(fontId, font);
+                });
+                this.state.fontIds.add(fontId);
+                fontStage.steps = this.state.fontIds.size;
+            }
+        });
+
+        pageStage.stepsDone = pageStage.stepsDone + 1;
         this.state.pages[index].items = textItems; // eslint-disable-line react/no-direct-mutation-state
         this.setState({
-            parsedPages: this.state.parsedPages + 1
+            progress: this.state.progress
         });
     }
 
+    announceFontParsed(fontId, font) {
+        const fontStage = this.state.progress.stages[1];
+        this.state.fontMap.set(fontId, font); // eslint-disable-line react/no-direct-mutation-state
+        fontStage.stepsDone = fontStage.stepsDone + 1;
+        if (this.state.progress.currentStage == 1) {
+            this.setState({ //force rendering
+                fontMap: this.state.fontMap,
+            });
+        }
+    }
 
     componentWillMount() {
-        const anounceInitialParseFunction = this.anounceInitialParse.bind(this);
+        const announceInitialParseFunction = this.announceInitialParse.bind(this);
-        const anouncePageParsedFunction = this.anouncePageParsed.bind(this);
+        const announcePageParsedFunction = this.announcePageParsed.bind(this);
+
         PDFJS.getDocument(this.props.fileBuffer).then(function(pdfDocument) { // eslint-disable-line no-undef
-            // console.log('Number of pages: ' + pdfDocument.numPages);
             // console.debug(pdfDocument);
-            const numPages = pdfDocument.numPages;
+            announceInitialParseFunction(pdfDocument);
-            // const numPages = 4; // hack
+            for (var j = 1; j <= pdfDocument.numPages; j++) {
-            var pages = [];
-            for (var i = 0; i < numPages; i++) {
-                pages.push(new Page({
-                    index: i
-                }));
-            }
-            anounceInitialParseFunction(pages);
-            for (var j = 1; j <= numPages; j++) {
                 pdfDocument.getPage(j).then(function(page) {
                     var scale = 1.0;
                     var viewport = page.getViewport(scale);
@@ -59,14 +97,8 @@ export default class LoadingView extends React.Component {
                     // pdfDocument.getMetadata().then(function(data) {
                     //     console.debug(data);
                     // });
-                    // page.getOperatorList().then(function(opList) {
-                    //     console.debug(opList);
-                    // // var svgGfx = new svgLib.SVGGraphics(page.commonObjs, page.objs);
-                    // // return svgGfx.getSVG(opList, viewport).then(function (svg) {
-                    // //   container.appendChild(svg);
-                    // // });
-                    // });
                     page.getTextContent().then(function(textContent) {
+                        // console.debug(textContent);
                         const textItems = textContent.items.map(function(item) {
                             const tx = PDFJS.Util.transform( // eslint-disable-line no-undef
                                 viewport.transform,
@@ -75,20 +107,19 @@ export default class LoadingView extends React.Component {
 
                             const fontHeight = Math.sqrt((tx[2] * tx[2]) + (tx[3] * tx[3]));
                             const dividedHeight = item.height / fontHeight;
-
-                            const style = textContent.styles[item.fontName];
                             return new TextItem({
                                 x: Math.round(item.transform[4]),
                                 y: Math.round(item.transform[5]),
                                 width: Math.round(item.width),
                                 height: Math.round(dividedHeight <= 1 ? item.height : dividedHeight),
                                 text: item.str,
-                                font: item.fontName,
+                                font: item.fontName
-                                fontAscent: style.ascent,
-                                fontDescent: style.descent
                             });
                         });
-                        anouncePageParsedFunction(page.pageIndex, textItems);
+                        announcePageParsedFunction(page.pageIndex, textItems);
+                    });
+                    page.getOperatorList().then(function() {
+                        // do nothing... this is only for triggering the font retrieval
                     });
                 });
             }
@@ -96,16 +127,20 @@ export default class LoadingView extends React.Component {
     }
 
     render() {
-        const {parsedPages, pages} = this.state;
+        const {pages, progress} = this.state;
-        var percentDone = 0;
+        const percentDone = getPercentDone(progress);
-        var details = '';
+        if (percentDone == 100) {
-        if (pages.length > 0) {
+            this.props.storePdfPagesFunction(pages, this.state.fontMap);
-            percentDone = parsedPages / pages.length * 100;
-            details = parsedPages + ' / ' + pages.length
-            if (parsedPages == pages.length) {
-                this.props.storePdfPagesFunction(this.state.pages);
-            }
         }
+        const stageItems = progress.stages.filter((elem, i) => i <= progress.currentStage).map((stage, i) => {
+            const progressDetails = stage.steps ? stage.stepsDone + ' / ' + stage.steps : '';
+            const checkmark = stage.isComplete() ? <FaCheck color={ 'green' } /> : '';
+            return <div key={ i }>
+                     { stage.name }
+                     { ' ' + progressDetails + ' ' }
+                     { checkmark }
+                   </div>
+        });
         return (
             <div style={ { textAlign: 'center' } }>
               <br/>
@@ -115,10 +150,64 @@ export default class LoadingView extends React.Component {
               <br/>
               <br/>
               <div>
-                Uploading and parsing PDF...
+                { stageItems }
-                <br/>
-                { ' ' + details }
               </div>
             </div>);
     }
-}
+}
+
+function getPercentDone(progress) {
+    const activeStage = progress.activeStage();
+    const percentDone = activeStage.percentDone();
+
+    if (percentDone == 100) {
+        progress.completeStage();
+        if (!progress.isComplete()) {
+            return getPercentDone(progress, 0);
+        }
+    }
+
+    return percentDone;
+}
+
+class Progress {
+
+    constructor(options) {
+        this.stages = options.stages;
+        this.currentStage = 0;
+    }
+
+    completeStage() {
+        this.currentStage++;
+    }
+
+    isComplete() {
+        return this.currentStage == this.stages.length;
+    }
+
+    activeStage() {
+        return this.stages[this.currentStage];
+    }
+
+}
+
+class ProgressStage {
+
+    constructor(name) {
+        this.name = name;
+        this.stepsDone = 0;
+        this.steps;
+    }
+
+    isComplete() {
+        return this.stepsDone == this.steps;
+    }
+
+    percentDone() {
+        if (!this.steps) {
+            return 0;
+        }
+        return this.stepsDone / this.steps * 100;
+    }
+}
+

src/javascript/components/debug/TextItemTable.jsx

@@ -34,7 +34,6 @@ export default class TextItemTable extends React.Component {
                                 </th>
                                 <th>
                                   Font
-                                  <br/>(asc/desc)
                                 </th>
                               </tr>
                             </thead>
@@ -81,8 +80,6 @@ export default class TextItemTable extends React.Component {
                                                               </td>
                                                               <td>
                                                                 { textItem.font }
-                                                                <br/>
-                                                                { textItem.fontAscent + ' / ' + textItem.fontDescent }
                                                               </td>
                                                             </tr>
         )

src/javascript/models/AppState.jsx

@@ -25,6 +25,7 @@ export default class AppState {
         this.mainView = View.UPLOAD;
         this.fileBuffer;
         this.pages = [];
+        this.fontMap;
         this.transformations = [
             new CalculateGlobalStats(),
             new CompactLines(),
@@ -62,8 +63,9 @@ export default class AppState {
         this.render()
     }
 
-    storePdfPages(pages) {
+    storePdfPages(pages, fontMap) {
         this.pages = pages;
+        this.fontMap = fontMap;
         this.fileBuffer = null;
         this.mainView = View.RESULT;
         this.render();