From f386484e1c6c96a21ab5e7d3d141a30baa93a5d5 Mon Sep 17 00:00:00 2001
From: mabdc <747455334@qq.com>
Date: Wed, 3 Mar 2021 15:55:19 +0800
Subject: [PATCH] fix

---
 example/lib/main.dart     | 15 ++++++++++-----
 lib/text_composition.dart | 21 ++++++++++++++++++---
 2 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/example/lib/main.dart b/example/lib/main.dart
index 5c160e4..8dfa1b3 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -7,7 +7,7 @@ import 'package:text_composition/text_composition.dart';
 import 'first_chapter.dart';
 
 ///
-/// 调试时修改161行
+/// 调试时修改`tc.getPageWidget(tc.pages[index], true, true),`
 /// * [useCanvas] 绘图方式（canvas/richText） [debug] 查看详细的布局输出
 /// * 等宽字体 时 `richText`和`canvas`结果一致
 /// * 非等宽字体 使用`canvas`才能两端对齐 [useCanvas] 应设为 [true]
@@ -86,13 +86,18 @@ class _SettingState extends State<Setting> {
                 shouldJustifyHeight: shouldJustifyHeight,
                 linkPattern: "<img",
                 linkText: (s) =>
-                    RegExp('src=".*/([^/]+)"').firstMatch(s)?.group(1) ?? "链接",
-                linkStyle: TextStyle(color: Colors.cyan, fontStyle: FontStyle.italic),
+                    RegExp('(?<=src=".*)[^/\'"]+(?=[\'"])').stringMatch(s) ?? "链接",
+                linkStyle: TextStyle(
+                  color: Colors.cyan,
+                  fontStyle: FontStyle.italic,
+                  fontSize: double.tryParse(size.text),
+                  height: double.tryParse(height.text),
+                ),
                 onLinkTap: (s) => Navigator.of(context).push(MaterialPageRoute(
                     builder: (BuildContext context) => Scaffold(
                           appBar: AppBar(),
                           body: Image.network(
-                              s.substring(s.indexOf("src=\"") + 5, s.lastIndexOf("\""))),
+                              RegExp('(?<=src=")[^\'"]+').stringMatch(s) ?? ""),
                         ))),
               );
               end = DateTime.now();
@@ -158,7 +163,7 @@ class Page extends StatelessWidget {
                 ),
                 Column(
                   children: [
-                    tc.getPageWidget(tc.pages[index], true, false),
+                    tc.getPageWidget(tc.pages[index], true, true),
                     Container(
                       height: 20,
                       width: tc.boxWidth,
diff --git a/lib/text_composition.dart b/lib/text_composition.dart
index 4dd2842..869814e 100644
--- a/lib/text_composition.dart
+++ b/lib/text_composition.dart
@@ -112,6 +112,8 @@ class TextComposition {
 
     for (var p in _paragraphs) {
       if (linkPattern != null && p.startsWith(linkPattern!)) {
+        tp.text = TextSpan(text: p, style: linkStyle);
+        tp.layout();
         pageHeight += tp.height;
         lines.add(TextLine(text: p, link: true));
         newParagraph();
@@ -123,7 +125,10 @@ class TextComposition {
           final textCount = tp.getPositionForOffset(offset).offset;
           if (p.length == textCount) {
             lines.add(TextLine(
-                text: p, width: tp.width, shouldJustifyWidth: tp.width > _boxWidth));
+              text: p,
+              width: tp.width,
+              shouldJustifyWidth: tp.width > _boxWidth,
+            ));
             newParagraph();
             break;
           } else {
@@ -200,12 +205,22 @@ class TextComposition {
 
   /// * [useCanvas] 绘图方式（canvas/richText） [debug] 查看详细的布局输出
   /// * 等宽字体 时 `richText`和`canvas`结果一致
-  /// * 非等宽字体 使用`canvas`才能两端对齐 [useCanvas] 应设为 [true] 
+  /// * 非等宽字体 使用`canvas`才能两端对齐 [useCanvas] 应设为 [true]
   Widget getPageWidget(TextPage page, [bool useCanvas = true, bool debug = false]) {
     print("****** [TextComposition page start] [${DateTime.now()}] ******");
     final ts = TextSpan(style: style, children: getPageSpans(page));
-    
+
     if (debug) {
+      var paragraphJustifyHeight = paragraph.toDouble();
+      var restJustifyHeight = 0;
+      if (shouldJustifyHeight && page.shouldJustifyHeight) {
+        final rest = boxHeight.floor() - page.height.floor();
+        restJustifyHeight = rest % page.paragraphCount;
+        paragraphJustifyHeight += rest ~/ page.paragraphCount;
+      }
+      print(
+          "paragraphJustifyHeight $paragraphJustifyHeight restJustifyHeight $restJustifyHeight");
+
       final tp = TextPainter(text: ts, textDirection: TextDirection.ltr);
       var lastLineHeight = 0;
       print("序号 行高 累计 宽度 内容");