1 package android.inputmethodservice; 2 3 import android.content.Context; 4 import android.util.AttributeSet; 5 import android.view.inputmethod.ExtractedText; 6 import android.widget.EditText; 7 8 /*** 9 * Specialization of {@link EditText} for showing and interacting with the 10 * extracted text in a full-screen input method. 11 */ 12 public class ExtractEditText extends EditText { 13 private InputMethodService mIME; 14 private int mSettingExtractedText; 15 ExtractEditText(Context context)16 public ExtractEditText(Context context) { 17 super(context, null); 18 } 19 ExtractEditText(Context context, AttributeSet attrs)20 public ExtractEditText(Context context, AttributeSet attrs) { 21 super(context, attrs, com.android.internal.R.attr.editTextStyle); 22 } 23 ExtractEditText(Context context, AttributeSet attrs, int defStyle)24 public ExtractEditText(Context context, AttributeSet attrs, int defStyle) { 25 super(context, attrs, defStyle); 26 } 27 setIME(InputMethodService ime)28 void setIME(InputMethodService ime) { 29 mIME = ime; 30 } 31 32 /** 33 * Start making changes that will not be reported to the client. That 34 * is, {@link #onSelectionChanged(int, int)} will not result in sending 35 * the new selection to the client 36 */ startInternalChanges()37 public void startInternalChanges() { 38 mSettingExtractedText += 1; 39 } 40 41 /** 42 * Finish making changes that will not be reported to the client. That 43 * is, {@link #onSelectionChanged(int, int)} will not result in sending 44 * the new selection to the client 45 */ finishInternalChanges()46 public void finishInternalChanges() { 47 mSettingExtractedText -= 1; 48 } 49 50 /** 51 * Implement just to keep track of when we are setting text from the 52 * client (vs. seeing changes in ourself from the user). 53 */ setExtractedText(ExtractedText text)54 @Override public void setExtractedText(ExtractedText text) { 55 try { 56 mSettingExtractedText++; 57 super.setExtractedText(text); 58 } finally { 59 mSettingExtractedText--; 60 } 61 } 62 63 /** 64 * Report to the underlying text editor about selection changes. 65 */ onSelectionChanged(int selStart, int selEnd)66 @Override protected void onSelectionChanged(int selStart, int selEnd) { 67 if (mSettingExtractedText == 0 && mIME != null && selStart >= 0 && selEnd >= 0) { 68 mIME.onExtractedSelectionChanged(selStart, selEnd); 69 } 70 } 71 72 /** 73 * Redirect clicks to the IME for handling there. First allows any 74 * on click handler to run, though. 75 */ performClick()76 @Override public boolean performClick() { 77 if (!super.performClick() && mIME != null) { 78 mIME.onExtractedTextClicked(); 79 return true; 80 } 81 return false; 82 } 83 onTextContextMenuItem(int id)84 @Override public boolean onTextContextMenuItem(int id) { 85 if (mIME != null) { 86 if (mIME.onExtractTextContextMenuItem(id)) { 87 return true; 88 } 89 } 90 return super.onTextContextMenuItem(id); 91 } 92 93 /** 94 * We are always considered to be an input method target. 95 */ isInputMethodTarget()96 public boolean isInputMethodTarget() { 97 return true; 98 } 99 100 /** 101 * Return true if the edit text is currently showing a scroll bar. 102 */ hasVerticalScrollBar()103 public boolean hasVerticalScrollBar() { 104 return computeVerticalScrollRange() > computeVerticalScrollExtent(); 105 } 106 107 /** 108 * Pretend like the window this view is in always has focus, so its 109 * highlight and cursor will be displayed. 110 */ hasWindowFocus()111 @Override public boolean hasWindowFocus() { 112 return this.isEnabled() ? true : false; 113 } 114 115 /** 116 * Pretend like this view always has focus, so its 117 * highlight and cursor will be displayed. 118 */ isFocused()119 @Override public boolean isFocused() { 120 return this.isEnabled() ? true : false; 121 } 122 123 /** 124 * Pretend like this view always has focus, so its 125 * highlight and cursor will be displayed. 126 */ hasFocus()127 @Override public boolean hasFocus() { 128 return this.isEnabled() ? true : false; 129 } 130 } 131