mirror of
https://github.com/NativeScript/NativeScript.git
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479 lines
20 KiB
TypeScript
479 lines
20 KiB
TypeScript
// Types
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import { TextDecoration, TextAlignment, TextTransform, layout, getClosestPropertyValue } from "./text-base-common";
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// Requires
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import { Font } from "../styling/font";
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import {
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TextBaseCommon, textProperty, formattedTextProperty, textAlignmentProperty, textDecorationProperty,
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textTransformProperty, letterSpacingProperty, colorProperty, fontInternalProperty, lineHeightProperty,
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FormattedString, Span, Color, resetSymbol
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} from "./text-base-common";
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import { isString } from "../../utils/types";
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import { ios } from "../../utils/utils";
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import { Property } from "../core/properties/properties";
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export * from "./text-base-common";
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const majorVersion = ios.MajorVersion;
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class UILabelClickHandlerImpl extends NSObject {
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private _owner: WeakRef<TextBase>;
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public static initWithOwner(owner: WeakRef<TextBase>): UILabelClickHandlerImpl {
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let handler = <UILabelClickHandlerImpl>UILabelClickHandlerImpl.new();
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handler._owner = owner;
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return handler;
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}
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public linkTap(tapGesture: UITapGestureRecognizer) {
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let owner = this._owner.get();
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if (owner) {
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// https://stackoverflow.com/a/35789589
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let label = <UILabel>owner.nativeTextViewProtected;
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let layoutManager = NSLayoutManager.alloc().init();
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let textContainer = NSTextContainer.alloc().initWithSize(CGSizeZero);
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let textStorage = NSTextStorage.alloc().initWithAttributedString(owner.nativeTextViewProtected["attributedText"]);
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layoutManager.addTextContainer(textContainer);
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textStorage.addLayoutManager(layoutManager);
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textContainer.lineFragmentPadding = 0;
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textContainer.lineBreakMode = label.lineBreakMode;
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textContainer.maximumNumberOfLines = label.numberOfLines;
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let labelSize = label.bounds.size;
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textContainer.size = labelSize;
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let locationOfTouchInLabel = tapGesture.locationInView(label);
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let textBoundingBox = layoutManager.usedRectForTextContainer(textContainer);
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let textContainerOffset = CGPointMake((labelSize.width - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x,
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(labelSize.height - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y);
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let locationOfTouchInTextContainer = CGPointMake(locationOfTouchInLabel.x - textContainerOffset.x,
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locationOfTouchInLabel.y - textContainerOffset.y);
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let indexOfCharacter = layoutManager.characterIndexForPointInTextContainerFractionOfDistanceBetweenInsertionPoints(
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locationOfTouchInTextContainer, textContainer, null);
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let span: Span = null;
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// try to find the corresponding span using the spanRanges
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for (let i = 0; i < owner._spanRanges.length; i++) {
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let range = owner._spanRanges[i];
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if ((range.location <= indexOfCharacter) && (range.location + range.length) > indexOfCharacter) {
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if (owner.formattedText && owner.formattedText.spans.length > i) {
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span = owner.formattedText.spans.getItem(i);
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}
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break;
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}
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}
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if (span && span.tappable) {
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// if the span is found and tappable emit the linkTap event
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span._emit(Span.linkTapEvent);
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}
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}
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}
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public static ObjCExposedMethods = {
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"linkTap": { returns: interop.types.void, params: [interop.types.id] }
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};
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}
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export class TextBase extends TextBaseCommon {
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public nativeViewProtected: UITextField | UITextView | UILabel | UIButton;
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public nativeTextViewProtected: UITextField | UITextView | UILabel | UIButton;
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private _tappable: boolean = false;
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private _tapGestureRecognizer: UITapGestureRecognizer;
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public _spanRanges: NSRange[];
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public initNativeView(): void {
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super.initNativeView();
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this._setTappableState(false);
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}
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_setTappableState(tappable: boolean) {
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if (this._tappable !== tappable) {
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this._tappable = tappable;
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if (this._tappable) {
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const tapHandler = UILabelClickHandlerImpl.initWithOwner(new WeakRef(this));
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// associate handler with menuItem or it will get collected by JSC.
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(<any>this).handler = tapHandler;
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this._tapGestureRecognizer = UITapGestureRecognizer.alloc().initWithTargetAction(tapHandler, "linkTap");
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this.nativeViewProtected.userInteractionEnabled = true;
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this.nativeViewProtected.addGestureRecognizer(this._tapGestureRecognizer);
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}
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else {
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this.nativeViewProtected.userInteractionEnabled = false;
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this.nativeViewProtected.removeGestureRecognizer(this._tapGestureRecognizer);
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}
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}
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}
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[textProperty.getDefault](): number | symbol {
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return resetSymbol;
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}
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[textProperty.setNative](value: string | number | symbol) {
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const reset = value === resetSymbol;
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if (!reset && this.formattedText) {
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return;
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}
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this._setNativeText(reset);
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this._requestLayoutOnTextChanged();
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}
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[formattedTextProperty.setNative](value: FormattedString) {
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this._setNativeText();
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this._setTappableState(isStringTappable(value));
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textProperty.nativeValueChange(this, !value ? "" : value.toString());
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this._requestLayoutOnTextChanged();
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}
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[colorProperty.getDefault](): UIColor {
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let nativeView = this.nativeTextViewProtected;
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if (nativeView instanceof UIButton) {
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return nativeView.titleColorForState(UIControlState.Normal);
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} else {
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return nativeView.textColor;
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}
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}
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[colorProperty.setNative](value: Color | UIColor) {
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const color = value instanceof Color ? value.ios : value;
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const nativeView = this.nativeTextViewProtected;
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if (nativeView instanceof UIButton) {
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nativeView.setTitleColorForState(color, UIControlState.Normal);
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nativeView.titleLabel.textColor = color;
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} else {
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nativeView.textColor = color;
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}
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}
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[fontInternalProperty.getDefault](): UIFont {
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let nativeView = this.nativeTextViewProtected;
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nativeView = nativeView instanceof UIButton ? nativeView.titleLabel : nativeView;
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return nativeView.font;
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}
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[fontInternalProperty.setNative](value: Font | UIFont) {
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if (!(value instanceof Font) || !this.formattedText) {
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let nativeView = this.nativeTextViewProtected;
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nativeView = nativeView instanceof UIButton ? nativeView.titleLabel : nativeView;
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const font = value instanceof Font ? value.getUIFont(nativeView.font) : value;
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nativeView.font = font;
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}
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}
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[textAlignmentProperty.setNative](value: TextAlignment) {
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const nativeView = <UITextField | UITextView | UILabel>this.nativeTextViewProtected;
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switch (value) {
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case "initial":
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case "left":
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nativeView.textAlignment = NSTextAlignment.Left;
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break;
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case "center":
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nativeView.textAlignment = NSTextAlignment.Center;
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break;
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case "right":
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nativeView.textAlignment = NSTextAlignment.Right;
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break;
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}
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}
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[textDecorationProperty.setNative](value: TextDecoration) {
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this._setNativeText();
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}
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[textTransformProperty.setNative](value: TextTransform) {
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this._setNativeText();
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}
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[letterSpacingProperty.setNative](value: number) {
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this._setNativeText();
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}
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[lineHeightProperty.setNative](value: number) {
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this._setNativeText();
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}
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_setNativeText(reset: boolean = false): void {
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if (reset) {
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const nativeView = this.nativeTextViewProtected;
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if (nativeView instanceof UIButton) {
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// Clear attributedText or title won't be affected.
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nativeView.setAttributedTitleForState(null, UIControlState.Normal);
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nativeView.setTitleForState(null, UIControlState.Normal);
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} else {
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// Clear attributedText or text won't be affected.
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nativeView.attributedText = null;
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nativeView.text = null;
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}
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return;
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}
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if (this.formattedText) {
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this.setFormattedTextDecorationAndTransform();
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} else {
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this.setTextDecorationAndTransform();
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}
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}
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setFormattedTextDecorationAndTransform() {
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const attrText = this.createNSMutableAttributedString(this.formattedText);
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// TODO: letterSpacing should be applied per Span.
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if (this.letterSpacing !== 0) {
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attrText.addAttributeValueRange(NSKernAttributeName, this.letterSpacing * this.nativeTextViewProtected.font.pointSize, { location: 0, length: attrText.length });
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}
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if (this.style.lineHeight) {
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const paragraphStyle = NSMutableParagraphStyle.alloc().init();
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paragraphStyle.minimumLineHeight = this.lineHeight;
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// make sure a possible previously set text alignment setting is not lost when line height is specified
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if (this.nativeTextViewProtected instanceof UIButton) {
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paragraphStyle.alignment = (<UIButton>this.nativeTextViewProtected).titleLabel.textAlignment;
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} else {
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paragraphStyle.alignment = (<UITextField | UITextView | UILabel>this.nativeTextViewProtected).textAlignment;
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}
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if (this.nativeTextViewProtected instanceof UILabel) {
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// make sure a possible previously set line break mode is not lost when line height is specified
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paragraphStyle.lineBreakMode = this.nativeTextViewProtected.lineBreakMode;
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}
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attrText.addAttributeValueRange(NSParagraphStyleAttributeName, paragraphStyle, { location: 0, length: attrText.length });
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} else if (this.nativeTextViewProtected instanceof UITextView) {
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const paragraphStyle = NSMutableParagraphStyle.alloc().init();
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paragraphStyle.alignment = (<UITextView>this.nativeTextViewProtected).textAlignment;
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attrText.addAttributeValueRange(NSParagraphStyleAttributeName, paragraphStyle, { location: 0, length: attrText.length });
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}
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if (this.nativeTextViewProtected instanceof UIButton) {
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this.nativeTextViewProtected.setAttributedTitleForState(attrText, UIControlState.Normal);
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}
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else {
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if (majorVersion >= 13 && UIColor.labelColor) {
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this.nativeTextViewProtected.textColor = UIColor.labelColor;
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}
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this.nativeTextViewProtected.attributedText = attrText;
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}
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}
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setTextDecorationAndTransform() {
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const style = this.style;
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const dict = new Map<string, any>();
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switch (style.textDecoration) {
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case "none":
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break;
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case "underline":
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dict.set(NSUnderlineStyleAttributeName, NSUnderlineStyle.Single);
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break;
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case "line-through":
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dict.set(NSStrikethroughStyleAttributeName, NSUnderlineStyle.Single);
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break;
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case "underline line-through":
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dict.set(NSUnderlineStyleAttributeName, NSUnderlineStyle.Single);
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dict.set(NSStrikethroughStyleAttributeName, NSUnderlineStyle.Single);
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break;
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default:
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throw new Error(`Invalid text decoration value: ${style.textDecoration}. Valid values are: 'none', 'underline', 'line-through', 'underline line-through'.`);
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}
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if (style.letterSpacing !== 0 && this.nativeTextViewProtected.font) {
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const kern = style.letterSpacing * this.nativeTextViewProtected.font.pointSize
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dict.set(NSKernAttributeName, kern);
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}
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if (style.color) {
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dict.set(NSForegroundColorAttributeName, style.color.ios);
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} else if (majorVersion >= 13 && UIColor.labelColor) {
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dict.set(NSForegroundColorAttributeName, UIColor.labelColor);
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}
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const isTextView = this.nativeTextViewProtected instanceof UITextView;
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if (style.lineHeight) {
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const paragraphStyle = NSMutableParagraphStyle.alloc().init();
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paragraphStyle.lineSpacing = style.lineHeight;
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// make sure a possible previously set text alignment setting is not lost when line height is specified
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if (this.nativeTextViewProtected instanceof UIButton) {
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paragraphStyle.alignment = (<UIButton>this.nativeTextViewProtected).titleLabel.textAlignment;
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} else {
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paragraphStyle.alignment = (<UITextField | UITextView | UILabel>this.nativeTextViewProtected).textAlignment;
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}
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if (this.nativeTextViewProtected instanceof UILabel) {
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// make sure a possible previously set line break mode is not lost when line height is specified
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paragraphStyle.lineBreakMode = this.nativeTextViewProtected.lineBreakMode;
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}
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dict.set(NSParagraphStyleAttributeName, paragraphStyle);
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} else if (isTextView) {
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const paragraphStyle = NSMutableParagraphStyle.alloc().init();
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paragraphStyle.alignment = (<UITextView>this.nativeTextViewProtected).textAlignment;
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dict.set(NSParagraphStyleAttributeName, paragraphStyle);
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}
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const source = getTransformedText(this.text ? this.text.toString() : "", this.textTransform);
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if (dict.size > 0 || isTextView) {
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if (isTextView && this.nativeTextViewProtected.font) {
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// UITextView's font seems to change inside.
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dict.set(NSFontAttributeName, this.nativeTextViewProtected.font);
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}
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const result = NSMutableAttributedString.alloc().initWithString(source);
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result.setAttributesRange(<any>dict, { location: 0, length: source.length });
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if (this.nativeTextViewProtected instanceof UIButton) {
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this.nativeTextViewProtected.setAttributedTitleForState(result, UIControlState.Normal);
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} else {
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this.nativeTextViewProtected.attributedText = result;
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}
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} else {
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if (this.nativeTextViewProtected instanceof UIButton) {
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// Clear attributedText or title won't be affected.
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this.nativeTextViewProtected.setAttributedTitleForState(null, UIControlState.Normal);
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this.nativeTextViewProtected.setTitleForState(source, UIControlState.Normal);
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} else {
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// Clear attributedText or text won't be affected.
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this.nativeTextViewProtected.attributedText = undefined;
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this.nativeTextViewProtected.text = source;
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}
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}
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}
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createNSMutableAttributedString(formattedString: FormattedString): NSMutableAttributedString {
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let mas = NSMutableAttributedString.alloc().init();
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this._spanRanges = [];
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if (formattedString && formattedString.parent) {
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for (let i = 0, spanStart = 0, length = formattedString.spans.length; i < length; i++) {
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const span = formattedString.spans.getItem(i);
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const text = span.text;
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const textTransform = (<TextBase>formattedString.parent).textTransform;
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let spanText = (text === null || text === undefined) ? "" : text.toString();
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if (textTransform !== "none" && textTransform !== "initial") {
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spanText = getTransformedText(spanText, textTransform);
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}
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const nsAttributedString = this.createMutableStringForSpan(span, spanText);
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mas.insertAttributedStringAtIndex(nsAttributedString, spanStart);
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this._spanRanges.push({location: spanStart, length: spanText.length});
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spanStart += spanText.length;
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}
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}
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return mas;
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}
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getBaselineOffset(font: UIFont, align?: string | number): number {
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if (!align || align === "baseline") {
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return 0;
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}
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if (align === "top") {
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return -this.fontSize - font.descender - font.ascender - font.leading / 2;
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}
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if (align === "bottom") {
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return font.descender + font.leading / 2;
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}
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if (align === "text-top") {
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return -this.fontSize - font.descender - font.ascender;
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}
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if (align === "text-bottom") {
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return font.descender;
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}
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if (align === "middle") {
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return (font.descender - font.ascender) / 2 - font.descender;
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}
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if (align === "super") {
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return -this.fontSize * .4;
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}
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if (align === "sub") {
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return (font.descender - font.ascender) * .4;
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}
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}
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createMutableStringForSpan(span: Span, text: string): NSMutableAttributedString {
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const viewFont = this.nativeTextViewProtected.font;
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const attrDict = <{ key: string, value: any }>{};
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const style = span.style;
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const align = style.verticalAlignment;
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const font = new Font(style.fontFamily, style.fontSize, style.fontStyle, style.fontWeight);
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const iosFont = font.getUIFont(viewFont);
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attrDict[NSFontAttributeName] = iosFont;
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if (span.color) {
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attrDict[NSForegroundColorAttributeName] = span.color.ios;
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}
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// We don't use isSet function here because defaultValue for backgroundColor is null.
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const backgroundColor = <Color>(style.backgroundColor
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|| (<FormattedString>span.parent).backgroundColor
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|| (<TextBase>span.parent.parent).backgroundColor);
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if (backgroundColor) {
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attrDict[NSBackgroundColorAttributeName] = backgroundColor.ios;
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}
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const textDecoration: TextDecoration = getClosestPropertyValue(textDecorationProperty, span);
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if (textDecoration) {
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const underline = textDecoration.indexOf("underline") !== -1;
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if (underline) {
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attrDict[NSUnderlineStyleAttributeName] = underline;
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}
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const strikethrough = textDecoration.indexOf("line-through") !== -1;
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if (strikethrough) {
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attrDict[NSStrikethroughStyleAttributeName] = strikethrough;
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}
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}
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if (align) {
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attrDict[NSBaselineOffsetAttributeName] = this.getBaselineOffset(iosFont, align);
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}
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return NSMutableAttributedString.alloc().initWithStringAttributes(text, <any>attrDict);
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}
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}
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export function getTransformedText(text: string, textTransform: TextTransform): string {
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if (!text || !isString(text)) {
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return "";
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}
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switch (textTransform) {
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case "uppercase":
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return NSStringFromNSAttributedString(text).uppercaseString;
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case "lowercase":
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return NSStringFromNSAttributedString(text).lowercaseString;
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case "capitalize":
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return NSStringFromNSAttributedString(text).capitalizedString;
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default:
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return text;
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}
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}
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function NSStringFromNSAttributedString(source: NSAttributedString | string): NSString {
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return NSString.stringWithString(source instanceof NSAttributedString && source.string || <string>source);
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}
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function isStringTappable(formattedString: FormattedString) {
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if (!formattedString) {
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return false;
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}
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for (let i = 0, length = formattedString.spans.length; i < length; i++) {
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const span = formattedString.spans.getItem(i);
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if (span.tappable) {
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return true;
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}
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}
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return false;
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} |