fix:measure方法新增默认width的处理 (#14)

Author: rjh520

harmony/text_size/src/main/ets/Config.ts

@@ -1,26 +1,36 @@
 import measure, { MeasureOptions } from '@ohos.measure';
+import display from '@ohos.display';
 import { text } from "@kit.ArkGraphics2D";
 
 export function config(measureText: MeasureOptions) {
   let textSize = measure.measureTextSize(measureText);
   return textSize;
 };
 
-export function measureTextParagraph(measureOptions: MeasureOptions,width: number){
+function getWidth(width: number | undefined | null) {
+  let densityWidth: number = 0;
+  if (width) {
+    densityWidth = width;
+  } else {
+    densityWidth = Math.floor(display.getDefaultDisplaySync().width / display.getDefaultDisplaySync().densityPixels);
+  }
+  return densityWidth;
+}
+
+export function measureTextParagraph(measureOptions: MeasureOptions, width: number) {
   let myTextStyle: text.TextStyle = {
     fontSize: Number(measureOptions.fontSize),
-    fontStyle:text.FontStyle.NORMAL,
-    letterSpacing: Number(measureOptions.letterSpacing),
+    fontStyle: text.FontStyle.NORMAL,
+    letterSpacing: Number(measureOptions.letterSpacing) || 0,
   };
   let myParagraphStyle: text.ParagraphStyle = {
     textStyle: myTextStyle,
-    align: text.TextAlign.END,
   };
   let ParagraphGraphBuilder = new text.ParagraphBuilder(myParagraphStyle, new text.FontCollection());
   ParagraphGraphBuilder.addText(`${measureOptions.textContent}`);
   // 文字绘制
   let paragraph = ParagraphGraphBuilder.build();
-  paragraph.layoutSync(width);
+  paragraph.layoutSync(getWidth(width));
   // 行数
   let lines = paragraph.getLineCount();
   // 最后一行宽

harmony/text_size/src/main/ets/RNTextSizeTurboModule.ts

@@ -25,7 +25,7 @@
 import { TurboModule } from "@rnoh/react-native-openharmony/ts";
 import font from '@ohos.font'
 import measure, { MeasureOptions } from '@ohos.measure'
-import { config,measureTextParagraph } from './Config';
+import { config, measureTextParagraph } from './Config';
 import display from '@ohos.display';
 
 export class RNTextSizeTurboModule extends TurboModule {
@@ -43,7 +43,7 @@ export class RNTextSizeTurboModule extends TurboModule {
         let textSize = config(measureText);
         let width: number = textSize.width as number;
         let height: number = textSize.height as number;
-        let measureResult = measureTextParagraph(measureText,options.width);
+        let measureResult = measureTextParagraph(measureText, options.width);
 
         let result: TSMeasureResult = {
           width: width,