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https://github.com/NativeScript/NativeScript.git
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571 lines
21 KiB
TypeScript
571 lines
21 KiB
TypeScript
// Types
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import { TextTransformation, TextDecoration, TextAlignment, TextTransform, WhiteSpace, getClosestPropertyValue } from "./text-base-common";
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// Requires
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import { Font } from "../styling/font";
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import { backgroundColorProperty } from "../styling/style-properties";
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import {
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TextBaseCommon, formattedTextProperty, textAlignmentProperty, textDecorationProperty, fontSizeProperty,
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textProperty, textTransformProperty, letterSpacingProperty, colorProperty, fontInternalProperty,
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paddingLeftProperty, paddingTopProperty, paddingRightProperty, paddingBottomProperty, Length,
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whiteSpaceProperty, lineHeightProperty, FormattedString, layout, Span, Color, isBold, resetSymbol
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} from "./text-base-common";
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import { isString } from "../../utils/types";
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export * from "./text-base-common";
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let TextTransformation: TextTransformation;
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function initializeTextTransformation(): void {
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if (TextTransformation) {
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return;
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}
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@Interfaces([android.text.method.TransformationMethod])
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class TextTransformationImpl extends java.lang.Object implements android.text.method.TransformationMethod {
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constructor(public textBase: TextBase) {
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super();
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return global.__native(this);
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}
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public getTransformation(charSeq: any, view: android.view.View): any {
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// NOTE: Do we need to transform the new text here?
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const formattedText = this.textBase.formattedText;
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if (formattedText) {
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return createSpannableStringBuilder(formattedText, (<android.widget.TextView>view).getTextSize());
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}
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else {
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const text = this.textBase.text;
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const stringValue = (text === null || text === undefined) ? "" : text.toString();
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return getTransformedText(stringValue, this.textBase.textTransform);
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}
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}
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public onFocusChanged(view: android.view.View, sourceText: string, focused: boolean, direction: number, previouslyFocusedRect: android.graphics.Rect): void {
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// Do nothing for now.
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}
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}
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TextTransformation = TextTransformationImpl;
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}
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interface ClickableSpan {
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new (owner: Span): android.text.style.ClickableSpan;
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}
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let ClickableSpan: ClickableSpan;
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function initializeClickableSpan(): void {
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if (ClickableSpan) {
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return;
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}
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class ClickableSpanImpl extends android.text.style.ClickableSpan {
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owner: WeakRef<Span>;
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constructor(owner: Span) {
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super();
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this.owner = new WeakRef(owner);
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return global.__native(this);
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}
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onClick(view: android.view.View): void {
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const owner = this.owner.get();
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if (owner) {
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owner._emit(Span.linkTapEvent);
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}
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view.clearFocus();
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view.invalidate();
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}
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updateDrawState(tp: android.text.TextPaint): void {
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// don't style as link
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}
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}
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ClickableSpan = ClickableSpanImpl;
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}
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export class TextBase extends TextBaseCommon {
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nativeViewProtected: android.widget.TextView;
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nativeTextViewProtected: android.widget.TextView;
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private _defaultTransformationMethod: android.text.method.TransformationMethod;
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private _paintFlags: number;
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private _minHeight: number;
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private _maxHeight: number;
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private _minLines: number;
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private _maxLines: number;
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private _tappable: boolean = false;
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private _defaultMovementMethod: android.text.method.MovementMethod;
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public initNativeView(): void {
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super.initNativeView();
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initializeTextTransformation();
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const nativeView = this.nativeTextViewProtected;
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this._defaultTransformationMethod = nativeView.getTransformationMethod();
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this._defaultMovementMethod = nativeView.getMovementMethod();
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this._minHeight = nativeView.getMinHeight();
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this._maxHeight = nativeView.getMaxHeight();
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this._minLines = nativeView.getMinLines();
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this._maxLines = nativeView.getMaxLines();
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}
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public resetNativeView(): void {
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super.resetNativeView();
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const nativeView = this.nativeTextViewProtected;
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// We reset it here too because this could be changed by multiple properties - whiteSpace, secure, textTransform
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nativeView.setSingleLine(this._isSingleLine);
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nativeView.setTransformationMethod(this._defaultTransformationMethod);
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this._defaultTransformationMethod = null;
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if (this._paintFlags !== undefined) {
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nativeView.setPaintFlags(this._paintFlags);
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this._paintFlags = undefined;
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}
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if (this._minLines !== -1) {
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nativeView.setMinLines(this._minLines);
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} else {
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nativeView.setMinHeight(this._minHeight);
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}
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this._minHeight = this._minLines = undefined;
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if (this._maxLines !== -1) {
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nativeView.setMaxLines(this._maxLines);
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} else {
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nativeView.setMaxHeight(this._maxHeight);
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}
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this._maxHeight = this._maxLines = undefined;
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}
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[textProperty.getDefault](): symbol | number {
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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._setTappableState(false);
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this._setNativeText(reset);
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}
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[formattedTextProperty.setNative](value: FormattedString) {
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const nativeView = this.nativeTextViewProtected;
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if (!value) {
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if (nativeView instanceof android.widget.Button &&
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nativeView.getTransformationMethod() instanceof TextTransformation) {
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nativeView.setTransformationMethod(this._defaultTransformationMethod);
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}
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}
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// Don't change the transformation method if this is secure TextField or we'll lose the hiding characters.
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if ((<any>this).secure) {
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return;
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}
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const spannableStringBuilder = createSpannableStringBuilder(value, this.style.fontSize);
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nativeView.setText(<any>spannableStringBuilder);
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this._setTappableState(isStringTappable(value));
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textProperty.nativeValueChange(this, (value === null || value === undefined) ? "" : value.toString());
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if (spannableStringBuilder && nativeView instanceof android.widget.Button &&
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!(nativeView.getTransformationMethod() instanceof TextTransformation)) {
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// Replace Android Button's default transformation (in case the developer has not already specified a text-transform) method
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// with our transformation method which can handle formatted text.
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// Otherwise, the default tranformation method of the Android Button will overwrite and ignore our spannableStringBuilder.
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nativeView.setTransformationMethod(new TextTransformation(this));
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}
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}
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[textTransformProperty.setNative](value: TextTransform) {
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if (value === "initial") {
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this.nativeTextViewProtected.setTransformationMethod(this._defaultTransformationMethod);
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return;
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}
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// Don't change the transformation method if this is secure TextField or we'll lose the hiding characters.
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if ((<any>this).secure) {
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return;
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}
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this.nativeTextViewProtected.setTransformationMethod(new TextTransformation(this));
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}
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[textAlignmentProperty.getDefault](): TextAlignment {
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return "initial";
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}
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[textAlignmentProperty.setNative](value: TextAlignment) {
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let verticalGravity = this.nativeTextViewProtected.getGravity() & android.view.Gravity.VERTICAL_GRAVITY_MASK;
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switch (value) {
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case "initial":
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case "left":
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this.nativeTextViewProtected.setGravity(android.view.Gravity.START | verticalGravity);
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break;
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case "center":
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this.nativeTextViewProtected.setGravity(android.view.Gravity.CENTER_HORIZONTAL | verticalGravity);
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break;
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case "right":
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this.nativeTextViewProtected.setGravity(android.view.Gravity.END | verticalGravity);
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break;
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}
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}
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// Overridden in TextField because setSingleLine(false) will remove methodTransformation.
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// and we don't want to allow TextField to be multiline
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[whiteSpaceProperty.setNative](value: WhiteSpace) {
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const nativeView = this.nativeTextViewProtected;
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switch (value) {
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case "initial":
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case "normal":
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nativeView.setSingleLine(false);
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nativeView.setEllipsize(null);
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break;
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case "nowrap":
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nativeView.setSingleLine(true);
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nativeView.setEllipsize(android.text.TextUtils.TruncateAt.END);
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break;
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}
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}
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[colorProperty.getDefault](): android.content.res.ColorStateList {
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return this.nativeTextViewProtected.getTextColors();
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}
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[colorProperty.setNative](value: Color | android.content.res.ColorStateList) {
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if (!this.formattedText || !(value instanceof Color)) {
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if (value instanceof Color) {
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this.nativeTextViewProtected.setTextColor(value.android);
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} else {
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this.nativeTextViewProtected.setTextColor(value);
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}
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}
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}
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[fontSizeProperty.getDefault](): { nativeSize: number } {
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return { nativeSize: this.nativeTextViewProtected.getTextSize() };
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}
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[fontSizeProperty.setNative](value: number | { nativeSize: number }) {
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if (!this.formattedText || (typeof value !== "number")) {
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if (typeof value === "number") {
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this.nativeTextViewProtected.setTextSize(value);
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} else {
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this.nativeTextViewProtected.setTextSize(android.util.TypedValue.COMPLEX_UNIT_PX, value.nativeSize);
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}
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}
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}
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[lineHeightProperty.getDefault](): number {
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return this.nativeTextViewProtected.getLineHeight() / layout.getDisplayDensity();
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}
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[lineHeightProperty.setNative](value: number) {
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const fontHeight = this.nativeTextViewProtected.getPaint().getFontMetricsInt(null);
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this.nativeTextViewProtected.setLineSpacing(Math.max(value - fontHeight, 0) * layout.getDisplayDensity(), 1);
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}
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[fontInternalProperty.getDefault](): android.graphics.Typeface {
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return this.nativeTextViewProtected.getTypeface();
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}
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[fontInternalProperty.setNative](value: Font | android.graphics.Typeface) {
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if (!this.formattedText || !(value instanceof Font)) {
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this.nativeTextViewProtected.setTypeface(value instanceof Font ? value.getAndroidTypeface() : value);
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}
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}
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[textDecorationProperty.getDefault](value: number) {
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return this._paintFlags = this.nativeTextViewProtected.getPaintFlags();
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}
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[textDecorationProperty.setNative](value: number | TextDecoration) {
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switch (value) {
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case "none":
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this.nativeTextViewProtected.setPaintFlags(0);
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break;
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case "underline":
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this.nativeTextViewProtected.setPaintFlags(android.graphics.Paint.UNDERLINE_TEXT_FLAG);
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break;
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case "line-through":
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this.nativeTextViewProtected.setPaintFlags(android.graphics.Paint.STRIKE_THRU_TEXT_FLAG);
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break;
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case "underline line-through":
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this.nativeTextViewProtected.setPaintFlags(android.graphics.Paint.UNDERLINE_TEXT_FLAG | android.graphics.Paint.STRIKE_THRU_TEXT_FLAG);
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break;
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default:
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this.nativeTextViewProtected.setPaintFlags(value);
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break;
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}
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}
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[letterSpacingProperty.getDefault](): number {
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return org.nativescript.widgets.ViewHelper.getLetterspacing(this.nativeTextViewProtected);
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}
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[letterSpacingProperty.setNative](value: number) {
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org.nativescript.widgets.ViewHelper.setLetterspacing(this.nativeTextViewProtected, value);
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}
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[paddingTopProperty.getDefault](): Length {
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return { value: this._defaultPaddingTop, unit: "px" };
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}
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[paddingTopProperty.setNative](value: Length) {
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org.nativescript.widgets.ViewHelper.setPaddingTop(this.nativeTextViewProtected, Length.toDevicePixels(value, 0) + Length.toDevicePixels(this.style.borderTopWidth, 0));
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}
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[paddingRightProperty.getDefault](): Length {
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return { value: this._defaultPaddingRight, unit: "px" };
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}
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[paddingRightProperty.setNative](value: Length) {
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org.nativescript.widgets.ViewHelper.setPaddingRight(this.nativeTextViewProtected, Length.toDevicePixels(value, 0) + Length.toDevicePixels(this.style.borderRightWidth, 0));
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}
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[paddingBottomProperty.getDefault](): Length {
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return { value: this._defaultPaddingBottom, unit: "px" };
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}
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[paddingBottomProperty.setNative](value: Length) {
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org.nativescript.widgets.ViewHelper.setPaddingBottom(this.nativeTextViewProtected, Length.toDevicePixels(value, 0) + Length.toDevicePixels(this.style.borderBottomWidth, 0));
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}
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[paddingLeftProperty.getDefault](): Length {
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return { value: this._defaultPaddingLeft, unit: "px" };
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}
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[paddingLeftProperty.setNative](value: Length) {
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org.nativescript.widgets.ViewHelper.setPaddingLeft(this.nativeTextViewProtected, Length.toDevicePixels(value, 0) + Length.toDevicePixels(this.style.borderLeftWidth, 0));
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}
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_setNativeText(reset: boolean = false): void {
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if (reset) {
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this.nativeTextViewProtected.setText(null);
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return;
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}
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let transformedText: any;
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if (this.formattedText) {
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transformedText = createSpannableStringBuilder(this.formattedText, this.style.fontSize);
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} else {
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const text = this.text;
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const stringValue = (text === null || text === undefined) ? "" : text.toString();
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transformedText = getTransformedText(stringValue, this.textTransform);
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}
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this.nativeTextViewProtected.setText(<any>transformedText);
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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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this.nativeViewProtected.setMovementMethod(android.text.method.LinkMovementMethod.getInstance());
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this.nativeViewProtected.setHighlightColor(null);
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}
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else {
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this.nativeViewProtected.setMovementMethod(this._defaultMovementMethod);
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}
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}
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}
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}
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function getCapitalizedString(str: string): string {
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let words = str.split(" ");
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let newWords = [];
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for (let i = 0, length = words.length; i < length; i++) {
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let word = words[i].toLowerCase();
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newWords.push(word.substr(0, 1).toUpperCase() + word.substring(1));
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}
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return newWords.join(" ");
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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 text.toUpperCase();
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case "lowercase":
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return text.toLowerCase();
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case "capitalize":
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return getCapitalizedString(text);
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case "none":
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default:
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return text;
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}
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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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}
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function createSpannableStringBuilder(formattedString: FormattedString, defaultFontSize: number): android.text.SpannableStringBuilder {
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if (!formattedString || !formattedString.parent) {
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return null;
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}
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const ssb = new android.text.SpannableStringBuilder();
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for (let i = 0, spanStart = 0, spanLength = 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 && textTransform !== "none") {
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spanText = getTransformedText(spanText, textTransform);
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}
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spanLength = spanText.length;
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if (spanLength > 0) {
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ssb.insert(spanStart, spanText);
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setSpanModifiers(ssb, span, spanStart, spanStart + spanLength, defaultFontSize);
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spanStart += spanLength;
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}
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}
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return ssb;
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}
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class BaselineAdjustedSpan extends android.text.style.MetricAffectingSpan {
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fontSize: number;
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align: string | number = "baseline";
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constructor(fontSize: number, align?: string | number) {
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super();
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this.align = align;
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this.fontSize = fontSize;
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}
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updateDrawState(paint: android.text.TextPaint) {
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this.updateState(paint);
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}
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updateMeasureState(paint: android.text.TextPaint) {
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this.updateState(paint);
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}
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updateState(paint: android.text.TextPaint) {
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const metrics = paint.getFontMetrics();
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if (!this.align || this.align === "baseline") {
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return;
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}
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if (this.align === "top") {
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return paint.baselineShift = -this.fontSize - metrics.bottom - metrics.top;
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}
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if (this.align === "bottom") {
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return paint.baselineShift = metrics.bottom;
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}
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if (this.align === "text-top") {
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return paint.baselineShift = -this.fontSize - metrics.descent - metrics.ascent;
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}
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if (this.align === "text-bottom") {
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return paint.baselineShift = metrics.bottom - metrics.descent;
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}
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if (this.align === "middle") {
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return paint.baselineShift = (metrics.descent - metrics.ascent) / 2 - metrics.descent;
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}
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if (this.align === "super") {
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return paint.baselineShift = -this.fontSize * .4;
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}
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if (this.align === "sub") {
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return paint.baselineShift = (metrics.descent - metrics.ascent) * .4;
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}
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}
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}
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function setSpanModifiers(ssb: android.text.SpannableStringBuilder, span: Span, start: number, end: number, defaultFontSize: number): void {
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const spanStyle = span.style;
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const bold = isBold(spanStyle.fontWeight);
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const italic = spanStyle.fontStyle === "italic";
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const align = spanStyle.verticalAlignment;
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if (bold && italic) {
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ssb.setSpan(new android.text.style.StyleSpan(android.graphics.Typeface.BOLD_ITALIC), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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else if (bold) {
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ssb.setSpan(new android.text.style.StyleSpan(android.graphics.Typeface.BOLD), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
else if (italic) {
|
|
ssb.setSpan(new android.text.style.StyleSpan(android.graphics.Typeface.ITALIC), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
const fontFamily = span.fontFamily;
|
|
if (fontFamily) {
|
|
const font = new Font(fontFamily, 0, (italic) ? "italic" : "normal", (bold) ? "bold" : "normal");
|
|
const typeface = font.getAndroidTypeface() || android.graphics.Typeface.create(fontFamily, 0);
|
|
const typefaceSpan: android.text.style.TypefaceSpan = new org.nativescript.widgets.CustomTypefaceSpan(fontFamily, typeface);
|
|
ssb.setSpan(typefaceSpan, start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
const realFontSize = span.fontSize;
|
|
if (realFontSize) {
|
|
ssb.setSpan(new android.text.style.AbsoluteSizeSpan(realFontSize * layout.getDisplayDensity()), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
const color = span.color;
|
|
if (color) {
|
|
ssb.setSpan(new android.text.style.ForegroundColorSpan(color.android), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
const backgroundColor: Color = getClosestPropertyValue(backgroundColorProperty, span);
|
|
|
|
if (backgroundColor) {
|
|
ssb.setSpan(new android.text.style.BackgroundColorSpan(backgroundColor.android), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
const textDecoration: TextDecoration = getClosestPropertyValue(textDecorationProperty, span);
|
|
|
|
if (textDecoration) {
|
|
const underline = textDecoration.indexOf("underline") !== -1;
|
|
if (underline) {
|
|
ssb.setSpan(new android.text.style.UnderlineSpan(), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
const strikethrough = textDecoration.indexOf("line-through") !== -1;
|
|
if (strikethrough) {
|
|
ssb.setSpan(new android.text.style.StrikethroughSpan(), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
}
|
|
|
|
if (align) {
|
|
ssb.setSpan(new BaselineAdjustedSpan(defaultFontSize * layout.getDisplayDensity(), align), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
const tappable = span.tappable;
|
|
if (tappable) {
|
|
initializeClickableSpan();
|
|
ssb.setSpan(new ClickableSpan(span), start, end, android.text.Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
}
|
|
|
|
// TODO: Implement letterSpacing for Span here.
|
|
// const letterSpacing = formattedString.parent.style.letterSpacing;
|
|
// if (letterSpacing > 0) {
|
|
// ssb.setSpan(new android.text.style.ScaleXSpan((letterSpacing + 1) / 10), start, end, android.text.Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
|
|
// }
|
|
}
|