summaryrefslogtreecommitdiff
path: root/indra/llui/lllineeditor.h
blob: 76d018771281041ccf959857d674e7158373cf6c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
/** 
 * @file lllineeditor.h
 * @brief Text editor widget to let users enter/edit a single line.
 *
 * Features: 
 *		Text entry of a single line (text, delete, left and right arrow, insert, return).
 *		Callbacks either on every keystroke or just on the return key.
 *		Focus (allow multiple text entry widgets)
 *		Clipboard (cut, copy, and paste)
 *		Horizontal scrolling to allow strings longer than widget size allows 
 *		Pre-validation (limit which keys can be used)
 *		Optional line history so previous entries can be recalled by CTRL UP/DOWN
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLLINEEDITOR_H
#define LL_LLLINEEDITOR_H

#include "v4color.h"
#include "llframetimer.h"

#include "lleditmenuhandler.h"
#include "lluictrl.h"
#include "lluistring.h"
#include "llviewborder.h"

#include "llpreeditor.h"
#include "lltextvalidate.h"

class LLFontGL;
class LLLineEditorRollback;
class LLButton;
class LLContextMenu;

class LLLineEditor
: public LLUICtrl, public LLEditMenuHandler, protected LLPreeditor
{
public:

	typedef boost::function<void (LLLineEditor* caller)> keystroke_callback_t;
	
	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
	{
		Optional<std::string>			default_text;
		Optional<S32>					max_length_bytes;

		Optional<keystroke_callback_t>	keystroke_callback;

		Optional<LLTextValidate::validate_func_t, LLTextValidate::ValidateTextNamedFuncs>	prevalidate_callback;
		
		Optional<LLViewBorder::Params>	border;

		Optional<LLUIImage*>			background_image,
										background_image_disabled,
										background_image_focused;

		Optional<bool>					select_on_focus,
										revert_on_esc,
										commit_on_focus_lost,
										ignore_tab;

		// colors
		Optional<LLUIColor>				cursor_color,
										text_color,
										text_readonly_color,
										text_tentative_color,
										highlight_color,
										preedit_bg_color;
		
		Optional<S32>					text_pad_left,
										text_pad_right;

		Ignored							bg_visible;
		
		Params();
	};
protected:
	LLLineEditor(const Params&);
	friend class LLUICtrlFactory;
	friend class LLFloaterEditUI;
	void showContextMenu(S32 x, S32 y);
public:
	virtual ~LLLineEditor();

	// mousehandler overrides
	/*virtual*/ BOOL	handleMouseDown(S32 x, S32 y, MASK mask);
	/*virtual*/ BOOL	handleMouseUp(S32 x, S32 y, MASK mask);
	/*virtual*/ BOOL	handleHover(S32 x, S32 y, MASK mask);
	/*virtual*/ BOOL	handleDoubleClick(S32 x,S32 y,MASK mask);
	/*virtual*/ BOOL	handleMiddleMouseDown(S32 x,S32 y,MASK mask);
	/*virtual*/ BOOL	handleRightMouseDown(S32 x, S32 y, MASK mask);
	/*virtual*/ BOOL	handleKeyHere(KEY key, MASK mask );
	/*virtual*/ BOOL	handleUnicodeCharHere(llwchar uni_char);
	/*virtual*/ void	onMouseCaptureLost();

	// LLEditMenuHandler overrides
	virtual void	cut();
	virtual BOOL	canCut() const;
	virtual void	copy();
	virtual BOOL	canCopy() const;
	virtual void	paste();
	virtual BOOL	canPaste() const;

	virtual void	updatePrimary();
	virtual void	copyPrimary();
 	virtual void	pastePrimary();
	virtual BOOL	canPastePrimary() const;

	virtual void	doDelete();
	virtual BOOL	canDoDelete() const;

	virtual void	selectAll();
	virtual BOOL	canSelectAll() const;

	virtual void	deselect();
	virtual BOOL	canDeselect() const;

	// view overrides
	virtual void	draw();
	virtual void	reshape(S32 width,S32 height,BOOL called_from_parent=TRUE);
	virtual void	onFocusReceived();
	virtual void	onFocusLost();
	virtual void	setEnabled(BOOL enabled);

	// UI control overrides
	virtual void	clear();
	virtual void	onTabInto();
	virtual void	setFocus( BOOL b );
	virtual void 	setRect(const LLRect& rect);
	virtual BOOL	acceptsTextInput() const;
	virtual void	onCommit();
	virtual BOOL	isDirty() const;	// Returns TRUE if user changed value at all
	virtual void	resetDirty();		// Clear dirty state

	// assumes UTF8 text
	virtual void	setValue(const LLSD& value );
	virtual LLSD	getValue() const;
	virtual BOOL	setTextArg( const std::string& key, const LLStringExplicit& text );
	virtual BOOL	setLabelArg( const std::string& key, const LLStringExplicit& text );

	void			setLabel(const LLStringExplicit &new_label) { mLabel = new_label; }
	const std::string& 	getLabel()	{ return mLabel.getString(); }

	void			setText(const LLStringExplicit &new_text);

	const std::string& getText() const		{ return mText.getString(); }
	LLWString       getWText() const	{ return mText.getWString(); }
	LLWString getConvertedText() const; // trimmed text with paragraphs converted to newlines

	S32				getLength() const	{ return mText.length(); }

	S32				getCursor()	const	{ return mCursorPos; }
	void			setCursor( S32 pos );
	void			setCursorToEnd();

	// Selects characters 'start' to 'end'.
	void			setSelection(S32 start, S32 end);
	virtual void	getSelectionRange(S32 *position, S32 *length) const;
	
	void			setCommitOnFocusLost( BOOL b )	{ mCommitOnFocusLost = b; }
	void			setRevertOnEsc( BOOL b )		{ mRevertOnEsc = b; }

	void setCursorColor(const LLColor4& c)			{ mCursorColor = c; }
	const LLColor4& getCursorColor() const			{ return mCursorColor.get(); }

	void setFgColor( const LLColor4& c )			{ mFgColor = c; }
	void setReadOnlyFgColor( const LLColor4& c )	{ mReadOnlyFgColor = c; }
	void setTentativeFgColor(const LLColor4& c)		{ mTentativeFgColor = c; }

	const LLColor4& getFgColor() const			{ return mFgColor.get(); }
	const LLColor4& getReadOnlyFgColor() const	{ return mReadOnlyFgColor.get(); }
	const LLColor4& getTentativeFgColor() const { return mTentativeFgColor.get(); }

	const LLFontGL* getFont() const { return mGLFont; }

	void			setIgnoreArrowKeys(BOOL b)		{ mIgnoreArrowKeys = b; }
	void			setIgnoreTab(BOOL b)			{ mIgnoreTab = b; }
	void			setPassDelete(BOOL b)			{ mPassDelete = b; }
	void			setDrawAsterixes(BOOL b);

	// get the cursor position of the beginning/end of the prev/next word in the text
	S32				prevWordPos(S32 cursorPos) const;
	S32				nextWordPos(S32 cursorPos) const;

	BOOL			hasSelection() const { return (mSelectionStart != mSelectionEnd); }
	void			startSelection();
	void			endSelection();
	void			extendSelection(S32 new_cursor_pos);
	void			deleteSelection();

	void			setSelectAllonFocusReceived(BOOL b);
	
	typedef boost::function<void (LLLineEditor* caller, void* user_data)> callback_t;
	void			setKeystrokeCallback(callback_t callback, void* user_data);

	void			setMaxTextLength(S32 max_text_length);
	// Manipulate left and right padding for text
	void getTextPadding(S32 *left, S32 *right);
	void setTextPadding(S32 left, S32 right);

	// Prevalidation controls which keystrokes can affect the editor
	void			setPrevalidate( LLTextValidate::validate_func_t func );
	static BOOL		postvalidateFloat(const std::string &str);

	// line history support:
	void			setEnableLineHistory( BOOL enabled ) { mHaveHistory = enabled; } // switches line history on or off 
	void			updateHistory(); // stores current line in history

	void			setReplaceNewlinesWithSpaces(BOOL replace);

	void			setContextMenu(LLContextMenu* new_context_menu);

private:
	// private helper methods

	void                    pasteHelper(bool is_primary);

	void			removeChar();
	void			addChar(const llwchar c);
	void			setCursorAtLocalPos(S32 local_mouse_x);
	S32				findPixelNearestPos(S32 cursor_offset = 0) const;
	BOOL			handleSpecialKey(KEY key, MASK mask);
	BOOL			handleSelectionKey(KEY key, MASK mask);
	BOOL			handleControlKey(KEY key, MASK mask);
	S32				handleCommitKey(KEY key, MASK mask);
	void			updateTextPadding();
	
	// Draw the background image depending on enabled/focused state.
	void			drawBackground();

	//
	// private data members
	//
	void			updateAllowingLanguageInput();
	BOOL			hasPreeditString() const;
	// Implementation (overrides) of LLPreeditor
	virtual void	resetPreedit();
	virtual void	updatePreedit(const LLWString &preedit_string,
						const segment_lengths_t &preedit_segment_lengths, const standouts_t &preedit_standouts, S32 caret_position);
	virtual void	markAsPreedit(S32 position, S32 length);
	virtual void	getPreeditRange(S32 *position, S32 *length) const;
	virtual BOOL	getPreeditLocation(S32 query_position, LLCoordGL *coord, LLRect *bounds, LLRect *control) const;
	virtual S32		getPreeditFontSize() const;
	virtual LLWString getPreeditString() const { return getWText(); }

protected:
	LLUIString		mText;					// The string being edited.
	std::string		mPrevText;				// Saved string for 'ESC' revert
	LLUIString		mLabel;					// text label that is visible when no user text provided

	// line history support:
	BOOL		mHaveHistory;				// flag for enabled line history
	typedef std::vector<std::string>	line_history_t;
	line_history_t	mLineHistory;			// line history storage
	line_history_t::iterator	mCurrentHistoryLine;	// currently browsed history line

	LLViewBorder* mBorder;
	const LLFontGL*	mGLFont;
	S32			mMaxLengthBytes;			// Max length of the UTF8 string in bytes
	S32			mCursorPos;					// I-beam is just after the mCursorPos-th character.
	S32			mScrollHPos;				// Horizontal offset from the start of mText.  Used for scrolling.
	LLFrameTimer mScrollTimer;
	S32			mTextPadLeft;				// Used to reserve space before the beginning of the text for children.
	S32			mTextPadRight;				// Used to reserve space after the end of the text for children.
	S32			mTextLeftEdge;				// Pixels, cached left edge of text based on left padding and width
	S32			mTextRightEdge;				// Pixels, cached right edge of text based on right padding and width

	BOOL		mCommitOnFocusLost;
	BOOL		mRevertOnEsc;

	keystroke_callback_t mKeystrokeCallback;

	BOOL		mIsSelecting;				// Selection for clipboard operations
	S32			mSelectionStart;
	S32			mSelectionEnd;
	S32			mLastSelectionX;
	S32			mLastSelectionY;
	S32			mLastSelectionStart;
	S32			mLastSelectionEnd;

	LLTextValidate::validate_func_t mPrevalidateFunc;

	LLFrameTimer mKeystrokeTimer;
	LLTimer		mTripleClickTimer;

	LLUIColor	mCursorColor;
	LLUIColor	mFgColor;
	LLUIColor	mReadOnlyFgColor;
	LLUIColor	mTentativeFgColor;
	LLUIColor	mHighlightColor;		// background for selected text
	LLUIColor	mPreeditBgColor;		// preedit marker background color

	S32			mBorderThickness;

	BOOL		mIgnoreArrowKeys;
	BOOL		mIgnoreTab;
	BOOL		mDrawAsterixes;

	BOOL		mSelectAllonFocusReceived;
	BOOL		mPassDelete;

	BOOL		mReadOnly;

	LLWString	mPreeditWString;
	LLWString	mPreeditOverwrittenWString;
	std::vector<S32> mPreeditPositions;
	LLPreeditor::standouts_t mPreeditStandouts;

	LLHandle<LLView> mContextMenuHandle;

private:
	// Instances that by default point to the statics but can be overidden in XML.
	LLPointer<LLUIImage> mBgImage;
	LLPointer<LLUIImage> mBgImageDisabled;
	LLPointer<LLUIImage> mBgImageFocused;

	BOOL        mReplaceNewlinesWithSpaces; // if false, will replace pasted newlines with paragraph symbol.

	// private helper class
	class LLLineEditorRollback
	{
	public:
		LLLineEditorRollback( LLLineEditor* ed )
			:
			mCursorPos( ed->mCursorPos ),
			mScrollHPos( ed->mScrollHPos ),
			mIsSelecting( ed->mIsSelecting ),
			mSelectionStart( ed->mSelectionStart ),
			mSelectionEnd( ed->mSelectionEnd )
		{
			mText = ed->getText();
		}

		void doRollback( LLLineEditor* ed )
		{
			ed->mCursorPos = mCursorPos;
			ed->mScrollHPos = mScrollHPos;
			ed->mIsSelecting = mIsSelecting;
			ed->mSelectionStart = mSelectionStart;
			ed->mSelectionEnd = mSelectionEnd;
			ed->mText = mText;
			ed->mPrevText = mText;
		}

		std::string getText()   { return mText; }

	private:
		std::string mText;
		S32		mCursorPos;
		S32		mScrollHPos;
		BOOL	mIsSelecting;
		S32		mSelectionStart;
		S32		mSelectionEnd;
	}; // end class LLLineEditorRollback

}; // end class LLLineEditor

// Build time optimization, generate once in .cpp file
#ifndef LLLINEEDITOR_CPP
extern template class LLLineEditor* LLView::getChild<class LLLineEditor>(
	const std::string& name, BOOL recurse) const;
#endif

#endif  // LL_LINEEDITOR_