78 lines
No EOL
4 KiB
JavaScript
78 lines
No EOL
4 KiB
JavaScript
import { getContext2dOrThrow } from '../dom/getContext2dOrThrow';
|
|
import { resolveInput } from '../dom/resolveInput';
|
|
export var AnchorPosition;
|
|
(function (AnchorPosition) {
|
|
AnchorPosition["TOP_LEFT"] = "TOP_LEFT";
|
|
AnchorPosition["TOP_RIGHT"] = "TOP_RIGHT";
|
|
AnchorPosition["BOTTOM_LEFT"] = "BOTTOM_LEFT";
|
|
AnchorPosition["BOTTOM_RIGHT"] = "BOTTOM_RIGHT";
|
|
})(AnchorPosition || (AnchorPosition = {}));
|
|
var DrawTextFieldOptions = /** @class */ (function () {
|
|
function DrawTextFieldOptions(options) {
|
|
if (options === void 0) { options = {}; }
|
|
var anchorPosition = options.anchorPosition, backgroundColor = options.backgroundColor, fontColor = options.fontColor, fontSize = options.fontSize, fontStyle = options.fontStyle, padding = options.padding;
|
|
this.anchorPosition = anchorPosition || AnchorPosition.TOP_LEFT;
|
|
this.backgroundColor = backgroundColor || 'rgba(0, 0, 0, 0.5)';
|
|
this.fontColor = fontColor || 'rgba(255, 255, 255, 1)';
|
|
this.fontSize = fontSize || 14;
|
|
this.fontStyle = fontStyle || 'Georgia';
|
|
this.padding = padding || 4;
|
|
}
|
|
return DrawTextFieldOptions;
|
|
}());
|
|
export { DrawTextFieldOptions };
|
|
var DrawTextField = /** @class */ (function () {
|
|
function DrawTextField(text, anchor, options) {
|
|
if (options === void 0) { options = {}; }
|
|
this.text = typeof text === 'string'
|
|
? [text]
|
|
: (text instanceof DrawTextField ? text.text : text);
|
|
this.anchor = anchor;
|
|
this.options = new DrawTextFieldOptions(options);
|
|
}
|
|
DrawTextField.prototype.measureWidth = function (ctx) {
|
|
var padding = this.options.padding;
|
|
return this.text.map(function (l) { return ctx.measureText(l).width; }).reduce(function (w0, w1) { return w0 < w1 ? w1 : w0; }, 0) + (2 * padding);
|
|
};
|
|
DrawTextField.prototype.measureHeight = function () {
|
|
var _a = this.options, fontSize = _a.fontSize, padding = _a.padding;
|
|
return this.text.length * fontSize + (2 * padding);
|
|
};
|
|
DrawTextField.prototype.getUpperLeft = function (ctx, canvasDims) {
|
|
var anchorPosition = this.options.anchorPosition;
|
|
var isShiftLeft = anchorPosition === AnchorPosition.BOTTOM_RIGHT || anchorPosition === AnchorPosition.TOP_RIGHT;
|
|
var isShiftTop = anchorPosition === AnchorPosition.BOTTOM_LEFT || anchorPosition === AnchorPosition.BOTTOM_RIGHT;
|
|
var textFieldWidth = this.measureWidth(ctx);
|
|
var textFieldHeight = this.measureHeight();
|
|
var x = (isShiftLeft ? this.anchor.x - textFieldWidth : this.anchor.x);
|
|
var y = isShiftTop ? this.anchor.y - textFieldHeight : this.anchor.y;
|
|
// adjust anchor if text box exceeds canvas borders
|
|
if (canvasDims) {
|
|
var width = canvasDims.width, height = canvasDims.height;
|
|
var newX = Math.max(Math.min(x, width - textFieldWidth), 0);
|
|
var newY = Math.max(Math.min(y, height - textFieldHeight), 0);
|
|
return { x: newX, y: newY };
|
|
}
|
|
return { x: x, y: y };
|
|
};
|
|
DrawTextField.prototype.draw = function (canvasArg) {
|
|
var canvas = resolveInput(canvasArg);
|
|
var ctx = getContext2dOrThrow(canvas);
|
|
var _a = this.options, backgroundColor = _a.backgroundColor, fontColor = _a.fontColor, fontSize = _a.fontSize, fontStyle = _a.fontStyle, padding = _a.padding;
|
|
ctx.font = fontSize + "px " + fontStyle;
|
|
var maxTextWidth = this.measureWidth(ctx);
|
|
var textHeight = this.measureHeight();
|
|
ctx.fillStyle = backgroundColor;
|
|
var upperLeft = this.getUpperLeft(ctx, canvas);
|
|
ctx.fillRect(upperLeft.x, upperLeft.y, maxTextWidth, textHeight);
|
|
ctx.fillStyle = fontColor;
|
|
this.text.forEach(function (textLine, i) {
|
|
var x = padding + upperLeft.x;
|
|
var y = padding + upperLeft.y + ((i + 1) * fontSize);
|
|
ctx.fillText(textLine, x, y);
|
|
});
|
|
};
|
|
return DrawTextField;
|
|
}());
|
|
export { DrawTextField };
|
|
//# sourceMappingURL=DrawTextField.js.map
|