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text.ts
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text.ts
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namespace SpriteKind {
//% isKind
export const Text = SpriteKind.create();
}
//% blockNamespace="textsprite"
//% blockGap=8
class TextSprite extends Sprite {
constructor(
public text: string,
public bg: number,
public fg: number,
public maxFontHeight: number,
public borderWidth: number,
public borderColor: number,
public padding: number,
public outlineWidth: number,
public outlineColor: number,
public icon: Image = null,
) {
super(image.create(0,0));
this.setKind(SpriteKind.Text);
this.setFlag(SpriteFlag.Ghost, true);
this.update()
}
//multilines
charsPerLine:number=0
public update() {
const borderAndPadding = this.borderWidth + this.padding + this.outlineWidth;
const iconWidth = this.icon ? this.icon.width + this.padding + this.outlineWidth : 0;
const iconHeight = this.icon ? this.icon.height : 0;
const font = textsprite.getFontForTextAndHeight(this.text, this.maxFontHeight);
let charsPerLine = this.text.length
let lines=1
//multilines
if (this.charsPerLine>0 && this.text.length>this.charsPerLine){
charsPerLine=this.charsPerLine
lines=Math.ceil(this.text.length/charsPerLine)
}
let width = iconWidth + font.charWidth * charsPerLine + 2 * borderAndPadding;
let height = Math.max(iconHeight, font.charHeight*lines) + 2 * borderAndPadding;
const img = image.create(width, height);
img.fill(this.borderColor);
img.fillRect(this.borderWidth, this.borderWidth, width - this.borderWidth * 2, height - this.borderWidth * 2, this.bg)
const textHeightOffset = (height - font.charHeight*lines) / 2
for(let i=0;i<lines;i++){
img.print(this.text.substr(i*charsPerLine,charsPerLine), iconWidth + borderAndPadding, textHeightOffset+i*font.charHeight, this.fg, font);
}
if (this.outlineWidth > 0)
textsprite.outlineOtherColor(img, this.fg, this.outlineWidth, this.outlineColor)
if (this.icon) {
const iconHeightOffset = (height - iconHeight) / 2
textsprite.renderScaledImage(this.icon, img, borderAndPadding, iconHeightOffset)
}
this.setImage(img)
}
/**
* Set how many characters per line, for multilines mode, set 0 for single line mode.
* @param chars 0 for single line, big then 0 for mutillines
*/
//% block="set $this(textSprite) $chars characters per line"
//% chars.defl=0
//% chars.min=0
//% group="Modify"
//% weight=50
public setCharsPerLine(chars: number) {
this.charsPerLine = chars
this.update();
}
//% block="set $this(textSprite) max font height $height"
//% group="Modify"
//% weight=50
public setMaxFontHeight(height: number) {
this.maxFontHeight = height
this.update();
}
//% block="set $this(textSprite) icon $icon=screen_image_picker"
//% group="Modify"
//% weight=46
public setIcon(icon: Image) {
this.icon = icon
this.update()
}
//% block="set $this(textSprite) text $text"
//% group="Modify"
//% weight=47
public setText(text: string) {
this.text = text || ""
this.update()
}
//% block="set $this(textSprite) border $width $color || and padding $padding"
//% width.defl=1
//% color.defl=6
//% color.shadow="colorindexpicker"
//% group="Modify"
//% weight=48
public setBorder(width: number, color: number, padding: number = 0) {
this.borderWidth = Math.max(width, 0);
this.borderColor = color;
this.padding = Math.max(padding, 0);
this.update()
}
//% block="set $this(textSprite) outline $width $color"
//% width.defl=1
//% color.defl=6
//% color.shadow="colorindexpicker"
//% group="Modify"
//% weight=49
public setOutline(width: number, color: number) {
this.outlineWidth = Math.max(width, 0);
this.outlineColor = color;
this.update();
}
}
//% color=#3e99de
//% icon="\uf031"
//% blockGap=8 block="Text Sprite"
//% groups='["Create", "Modify"]'
namespace textsprite {
// TODO: downscale and upscale icons?
export function renderScaledImage(source: Image, destination: Image, x: number, y: number, downScalePowerOfTwo: number = 0) {
const scale = downScalePowerOfTwo;
const tile = source
for (let i = 0; i < source.width; i += 1 << scale) {
for (let j = 0; j < source.height; j += 1 << scale) {
if (source.getPixel(i, j) != 0) {
destination.setPixel(x + (i >> scale), y + (j >> scale), source.getPixel(i, j))
}
}
}
}
export function getFontForTextAndHeight(text: string, maxHeight: number): image.Font {
const baseFont = image.getFontForText(text)
const hasUnicode = baseFont.charHeight === 12 // this is a hack
const availableFonts: image.Font[] = hasUnicode
? [baseFont]
: [image.font8, image.font5] // 8 and 5 are generally better fonts than 12
const remainders = availableFonts.map(s => maxHeight % s.charHeight)
const fontIdx = remainders.reduce((p, n, i) => remainders[p] <= n ? p : i, 99)
const font = availableFonts[fontIdx]
return image.scaledFont(font, maxHeight / font.charHeight)
}
//% block="text sprite $text || as $fg on $bg"
//% blockId="textsprite_create"
//% blockSetVariable="textSprite"
//% expandableArgumentMode="toggle"
//% bg.defl=0
//% bg.shadow="colorindexpicker"
//% fg.defl=1
//% fg.shadow="colorindexpicker"
//% group="Create"
//% weight=100
export function create(
text: string,
bg: number = 0,
fg: number = 1,
): TextSprite {
const sprite = new TextSprite(text, bg, fg, 8, 0, 0, 0, 0, 0);
game.currentScene().physicsEngine.addSprite(sprite);
return sprite;
}
export function outlineOtherColor(img: Image, targetColor: number, outlineWidth: number, outlineColor: number) {
let toOutlineX: number[] = [];
let toOutlineY: number[] = [];
for (let x = 0; x < img.width; x++) {
for (let y = 0; y < img.height; y++) {
for (let sx = 0; sx <= outlineWidth; sx++) {
for (let sy = 0; sy <= outlineWidth; sy++) {
if (sx + sy === 0)
continue;
if (img.getPixel(x, y) === targetColor)
continue
if (img.getPixel(x + sx, y + sy) === targetColor
|| img.getPixel(x - sx, y + sy) === targetColor
|| img.getPixel(x + sx, y - sy) === targetColor
|| img.getPixel(x - sx, y - sy) === targetColor
) {
img.setPixel(x, y, outlineColor)
// toOutlineX.push(x)
// toOutlineY.push(y)
}
}
}
}
}
// for (let i = 0; i < toOutlineX.length; i++) {
// const x = toOutlineX[i]
// const y = toOutlineY[i]
// img.setPixel(x, y, outlineColor)
// }
}
}