feat(editor): auto indent

app/build.gradle

@@ -8,8 +8,8 @@ android {
         applicationId "com.stardust.scriptdroid"
         minSdkVersion 17
         targetSdkVersion 23
-        versionCode 253
-        versionName "3.1.0 Alpha3"
+        versionCode 254
+        versionName "3.1.0 Alpha4"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         multiDexEnabled true
         ndk {

app/src/main/assets/js/beautify.js

@@ -2828,7 +2828,7 @@ if (typeof define === "function" && define.amd) {
 
 function beautify(source){
     return js_beautify(source, {
-           'indent_size': 2,
+           'indent_size': 4,
            'e4x': true
     });
 }

app/src/main/java/com/stardust/scriptdroid/ui/edit/editor/AutoIndent.java

@@ -0,0 +1,101 @@
+package com.stardust.scriptdroid.ui.edit.editor;
+
+import android.text.Editable;
+import android.text.TextWatcher;
+
+/**
+ * Created by Stardust on 2018/2/25.
+ */
+
+public class AutoIndent implements TextWatcher {
+
+    private String mIndent = "    ";
+    private CodeEditText mEditText;
+    private boolean mInsertingIndent = false;
+    private boolean mExtraIndent = false;
+    private boolean mAutoIndent = false;
+    private int mCursor;
+
+    public AutoIndent(CodeEditText editText) {
+        mEditText = editText;
+    }
+
+    @Override
+    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+    }
+
+    /**
+     * 判断是否是在光标处插入一个换行符的情况，是的话在下一个afterTextChanged回调中将调整缩进
+     */
+    @Override
+    public void onTextChanged(CharSequence s, int start, int before, int count) {
+        if (mInsertingIndent)
+            return;
+        //不是插入一个字符的情况
+        if (count != 1 || before != 0) {
+            return;
+        }
+        //边界检查，虽然可能并非必要
+        if (start - 1 < 0 || start >= s.length()) {
+            return;
+        }
+        char charInserted = s.charAt(start);
+        //不是插入换行符的情况
+        if (charInserted != '\n') {
+            return;
+        }
+        mCursor = mEditText.getSelectionStart();
+        //不是在光标处插入字符的情况
+        if (mCursor != mEditText.getSelectionEnd() || mCursor != start + 1) {
+            return;
+        }
+        //到这里已经可以判断为当前的字符变化为"在光标处插入一个换行符"的情况
+        mAutoIndent = true;
+        //我们再做一点额外判断。判断换行符之前的字符是否是括号，是的话下行将额外增加空格用于缩进
+        char charBefore = s.charAt(start - 1);
+        if (charBefore == '{' || charBefore == '(') {
+            mExtraIndent = true;
+        }
+
+    }
+
+    @Override
+    public void afterTextChanged(Editable s) {
+        if (mInsertingIndent || !mAutoIndent) {
+            return;
+        }
+        CharSequence indent = getLastLineIndent();
+        if (mExtraIndent) {
+            indent = mIndent + indent;
+        }
+        mInsertingIndent = true;
+        s.insert(mCursor, indent);
+        mInsertingIndent = false;
+        mExtraIndent = mAutoIndent = false;
+        mCursor = -1;
+    }
+
+    private CharSequence getLastLineIndent() {
+        if (mCursor < 0 || mCursor > mEditText.length()) {
+            return "";
+        }
+        int line = LayoutHelper.getLineOfChar(mEditText.getLayout(), mCursor);
+        if (line == 0) {
+            return "";
+        }
+        int lastLineStart = mEditText.getLayout().getLineStart(line - 1);
+        int lastLineEnd = mEditText.getLayout().getLineEnd(line);
+        for (int i = lastLineStart; i < lastLineEnd; i++) {
+            if (mEditText.getText().charAt(i) != ' ') {
+                if (i == lastLineStart) {
+                    return "";
+                } else {
+                    return mEditText.getText().subSequence(lastLineStart, i);
+                }
+            }
+        }
+        return mEditText.getText().subSequence(lastLineStart, lastLineEnd);
+    }
+
+
+}

app/src/main/java/com/stardust/scriptdroid/ui/edit/editor/CodeEditText.java

@@ -22,6 +22,7 @@ import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Typeface;
+import android.speech.tts.TextToSpeech;
 import android.support.v7.widget.AppCompatEditText;
 import android.text.Layout;
 import android.util.AttributeSet;

app/src/main/java/com/stardust/scriptdroid/ui/edit/editor/CodeEditor.java

@@ -68,6 +68,7 @@ public class CodeEditor extends HVScrollView {
         //setFillViewport(true);
         inflate(getContext(), R.layout.code_editor, this);
         mCodeEditText = (CodeEditText) findViewById(R.id.code_edit_text);
+        mCodeEditText.addTextChangedListener(new AutoIndent(mCodeEditText));
         mTextViewRedoUndo = new TextViewRedoUndo(mCodeEditText);
         mJavaScriptHighlighter = new JavaScriptHighlighter(mTheme, mCodeEditText);
         setTheme(Theme.getDefault(getContext()));

common/src/main/java/com/stardust/util/DeveloperUtils.java

@@ -167,10 +167,10 @@ public class DeveloperUtils {
                     a.finish();
                     return;
                 }
-                long[] crc = readCrc(a.getString(crcRes));
-                if (!checkDexFile(a, crc)) {
-                    a.finish();
-                }
+                //long[] crc = readCrc(a.getString(crcRes));
+                //if (!checkDexFile(a, crc)) {
+                //  a.finish();
+                //}
 
             }
         });