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Text is hyphenated and also wraps around line in posts #268

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2b32fef
text-wrap now works
LunarFang416 May 25, 2022
f38985f
code clean-up
LunarFang416 May 26, 2022
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170 changes: 111 additions & 59 deletions src/app/components/fabric-post/fabric-post.component.ts
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Original file line number Diff line number Diff line change
@@ -1,117 +1,157 @@
import { Component, Inject } from '@angular/core';
import { fabric } from 'fabric';
import { POST_DEFAULT_BORDER, POST_DEFAULT_BORDER_THICKNESS } from 'src/app/utils/constants';
import {
POST_DEFAULT_BORDER,
POST_DEFAULT_BORDER_THICKNESS,
} from 'src/app/utils/constants';
import { FabricUtils } from 'src/app/utils/FabricUtils';

const AUTHOR_OFFSET = 65
const DESC_OFFSET = 80
const CONTENT_EXTRA_HEIGHT = 55
const AUTHOR_OFFSET = 65;
const DESC_OFFSET = 80;
const CONTENT_EXTRA_HEIGHT = 55;

@Component({
selector: 'app-fabric-post',
templateUrl: './fabric-post.component.html',
styleUrls: ['./fabric-post.component.scss']
styleUrls: ['./fabric-post.component.scss'],
})
export class FabricPostComponent extends fabric.Group {
constructor(
@Inject(Object) options: any,
) {
var fabricUtils: FabricUtils = new FabricUtils();
var title = new fabric.Textbox(
fabricUtils.wrapCanvasText(options.title, 140, 0),
{
name: 'title',
width: 280,
left: 18,
top: 60,
fontSize: 18,
fontWeight: 'bold',
fontFamily: 'Helvetica',
fill: '#000000',
splitByGrapheme: true,
}
);

constructor(@Inject(Object) options:any) {
var title = new fabric.Textbox(options.title, {
name: 'title',
width: 280,
left: 18,
top: 60,
fontSize: 18,
fontWeight: 'bold',
fontFamily: 'Helvetica',
fill: '#000000',
splitByGrapheme: true
});

var author = new fabric.Textbox(options.author, {
name: 'author',
width: 300,
left: 18,
top: title.getScaledHeight() + AUTHOR_OFFSET,
fontSize: 13,
fontFamily: 'Helvetica',
fill: '#555555',
splitByGrapheme: true,
});
var author = new fabric.Textbox(
fabricUtils.wrapCanvasText(options.author, 200, 0),
{
name: 'author',
width: 300,
left: 18,
top: title.getScaledHeight() + AUTHOR_OFFSET,
fontSize: 13,
fontFamily: 'Helvetica',
fill: '#555555',
splitByGrapheme: true,
}
);

var desc = new fabric.Textbox(options.desc.length > 200 ? options.desc.substr(0, 200) + '...' : options.desc, {
name: 'desc',
width: 300,
left: 18,
top: author.getScaledHeight() + title.getScaledHeight() + DESC_OFFSET,
fontSize: 15,
fontFamily: 'Helvetica',
fill: '#000000',
splitByGrapheme: true
});
var desc = new fabric.Textbox(
fabricUtils.wrapCanvasText(
options.desc.length > 200
? options.desc.substr(0, 200) + '...'
: options.desc,
200,
0
),
{
name: 'desc',
width: 300,
left: 18,
top: author.getScaledHeight() + title.getScaledHeight() + DESC_OFFSET,
fontSize: 15,
fontFamily: 'Helvetica',
fill: '#000000',
splitByGrapheme: true,
}
);

var commentButton = new fabric.Textbox('💬', {
name: 'comment',
width: 55,
top: title.getScaledHeight() + author.getScaledHeight() + desc.getScaledHeight() + 90,
left: 170 ,
top:
title.getScaledHeight() +
author.getScaledHeight() +
desc.getScaledHeight() +
90,
left: 170,
fontSize: 20,
fontFamily: 'Helvetica',
fill: '#000000',
splitByGrapheme: true,
opacity:0
opacity: 0,
});

var commentCount = new fabric.Textbox('0', {
name: 'commentCount',
width: 55,
top: title.getScaledHeight() + author.getScaledHeight() + desc.getScaledHeight() + 90,
top:
title.getScaledHeight() +
author.getScaledHeight() +
desc.getScaledHeight() +
90,
left: (commentButton.left ?? 0) + 28,
fontSize: 20,
fontFamily: 'Helvetica',
fill: '#555555',
splitByGrapheme: true,
opacity:0
opacity: 0,
});

var likeButton = new fabric.Textbox('👍🏼', {
name: 'like',
width: 55,
top: title.getScaledHeight() + author.getScaledHeight() + desc.getScaledHeight() + 90,
left: (commentCount.left??0) +45,
top:
title.getScaledHeight() +
author.getScaledHeight() +
desc.getScaledHeight() +
90,
left: (commentCount.left ?? 0) + 45,
fontSize: 20,
fontFamily: 'Helvetica',
fill: '#000000',
splitByGrapheme: true
splitByGrapheme: true,
});

var likeCount = new fabric.Textbox('0', {
name: 'likeCount',
width: 55,
top: title.getScaledHeight() + author.getScaledHeight() + desc.getScaledHeight() + 90,
top:
title.getScaledHeight() +
author.getScaledHeight() +
desc.getScaledHeight() +
90,
left: (likeButton.left ?? 0) + 28,
fontSize: 20,
fontFamily: 'Helvetica',
fill: '#555555',
splitByGrapheme: true
splitByGrapheme: true,
});



var content = new fabric.Rect({
name: 'content',
top: 40,
width: 330,
height: title.getScaledHeight() + author.getScaledHeight() + desc.getScaledHeight() + commentButton.getScaledHeight() + CONTENT_EXTRA_HEIGHT,
height:
title.getScaledHeight() +
author.getScaledHeight() +
desc.getScaledHeight() +
commentButton.getScaledHeight() +
CONTENT_EXTRA_HEIGHT,
fill: options.color,
rx: 20,
rx: 20,
ry: 20,
strokeWidth: options.strokeWidth ?? POST_DEFAULT_BORDER_THICKNESS,
stroke: options.stroke ?? POST_DEFAULT_BORDER,
});

const groupOptions = {
name: 'post',
left: options.left - (330 / 2),
top: options.top - ((content.height ?? 0) / 2),
left: options.left - 330 / 2,
top: options.top - (content.height ?? 0) / 2,
hasControls: false,
transparentCorners: false,
cornerSize: 7,
Expand All @@ -123,8 +163,20 @@ export class FabricPostComponent extends fabric.Group {
tags: options.tags,
subTargetCheck: true,
authorID: options.authorID,
}
};

super([content, title, author, desc, likeButton, likeCount, commentButton, commentCount], groupOptions);
};
}
super(
[
content,
title,
author,
desc,
likeButton,
likeCount,
commentButton,
commentCount,
],
groupOptions
);
}
}
56 changes: 56 additions & 0 deletions src/app/utils/FabricUtils.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,62 @@ export class FabricUtils {
this._canvas = surface;
}

wrapCanvasText(t, maxW, maxH) {
this._canvas = new fabric.Canvas('c');
if (typeof maxH === 'undefined') {
maxH = 0;
}
var words = t.split(' ');
var formatted = '';
var context = this._canvas?.getContext();
context.font = t.fontSize + 'px ' + t.fontFamily;
var currentLine = '';

for (var n = 0; n < words.length; n++) {
var isNewLine = currentLine == '';
var testOverlap = currentLine + ' ' + words[n];

// are we over width?
var w = context.measureText(testOverlap).width;

if (w < maxW) {
// if not, keep adding words
currentLine += words[n] + ' ';
formatted += words[n] += ' ';
} else {
// if this hits, we got a word that need to be hypenated
if (isNewLine) {
var wordOverlap = '';

// test word length until its over maxW
for (var i = 0; i < words[n].length; ++i) {
wordOverlap += words[n].charAt(i);
var withHypeh = wordOverlap + '-';

if (context.measureText(withHypeh).width >= maxW) {
// add hyphen when splitting a word
withHypeh = wordOverlap.substr(0, wordOverlap.length - 2) + '-';
// update current word with remainder
words[n] = words[n].substr(
wordOverlap.length - 1,
words[n].length
);
formatted += withHypeh; // add hypenated word
break;
}
}
}
n--; // restart cycle
formatted += '\n';
currentLine = '';
}
}

formatted = formatted.substr(0, formatted.length - 1);
console.log(formatted);
return formatted;
}

setField(obj, key, value) {
obj.set(key, value);
fabric.util.object.extend(obj, { [key]: value });
Expand Down