summaryrefslogtreecommitdiff
path: root/indra/llui/lltexteditor.h
blob: f3939248c2acf6413ea3241c5009ea0418853359 (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
/**
 * @file lltexteditor.h
 * @brief LLTextEditor base class
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

// Text editor widget to let users enter a a multi-line ASCII document//

#ifndef LL_LLTEXTEDITOR_H
#define LL_LLTEXTEDITOR_H

#include "llrect.h"
#include "llframetimer.h"
#include "llstyle.h"
#include "lleditmenuhandler.h"
#include "llviewborder.h" // for params
#include "lltextbase.h"
#include "lltextvalidate.h"

#include "llpreeditor.h"
#include "llcontrol.h"

class LLFontGL;
class LLScrollbar;
class TextCmd;
class LLUICtrlFactory;
class LLScrollContainer;

class LLTextEditor :
	public LLTextBase,
	protected LLPreeditor
{
public:
	struct Params : public LLInitParam::Block<Params, LLTextBase::Params>
	{
		Optional<std::string>	default_text;
		Optional<LLTextValidate::validate_func_t, LLTextValidate::ValidateTextNamedFuncs>	prevalidate_callback;

		Optional<bool>			embedded_items,
								ignore_tab,
								commit_on_focus_lost,
								show_context_menu,
								enable_tooltip_paste,
								auto_indent;

		//colors
		Optional<LLUIColor>		default_color;

		Params();
	};

	void initFromParams(const Params&);
protected:
	LLTextEditor(const Params&);
	friend class LLUICtrlFactory;
public:
	//
	// Constants
	//
	static const llwchar FIRST_EMBEDDED_CHAR = 0x100000;
	static const llwchar LAST_EMBEDDED_CHAR =  0x10ffff;
	static const S32 MAX_EMBEDDED_ITEMS = LAST_EMBEDDED_CHAR - FIRST_EMBEDDED_CHAR + 1;

	virtual ~LLTextEditor();

	typedef boost::signals2::signal<void (LLTextEditor* caller)> keystroke_signal_t;

	void	setKeystrokeCallback(const keystroke_signal_t::slot_type& callback);

	void	setParseHighlights(BOOL parsing) {mParseHighlights=parsing;}

	static S32		spacesPerTab();

	// mousehandler overrides
	virtual BOOL	handleMouseDown(S32 x, S32 y, MASK mask);
	virtual BOOL	handleMouseUp(S32 x, S32 y, MASK mask);
	virtual BOOL	handleRightMouseDown(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	handleKeyHere(KEY key, MASK mask );
	virtual BOOL	handleUnicodeCharHere(llwchar uni_char);

	virtual void	onMouseCaptureLost();

	// view overrides
	virtual void	draw();
	virtual void	onFocusReceived();
	virtual void	onFocusLost();
	virtual void	onCommit();
	virtual void	setEnabled(BOOL enabled);

	// uictrl overrides
	virtual void	clear();
	virtual void	setFocus( BOOL b );
	virtual BOOL	isDirty() const;

	// LLEditMenuHandler interface
	virtual void	undo();
	virtual BOOL	canUndo() const;
	virtual void	redo();
	virtual BOOL	canRedo() const;

	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;

	void 			selectByCursorPosition(S32 prev_cursor_pos, S32 next_cursor_pos);

	virtual bool	canLoadOrSaveToFile();

	void			selectNext(const std::string& search_text_in, BOOL case_insensitive, BOOL wrap = TRUE);
	BOOL			replaceText(const std::string& search_text, const std::string& replace_text, BOOL case_insensitive, BOOL wrap = TRUE);
	void			replaceTextAll(const std::string& search_text, const std::string& replace_text, BOOL case_insensitive);

	// Undo/redo stack
	void			blockUndo();

	// Text editing
	virtual void	makePristine();
	BOOL			isPristine() const;
	BOOL			allowsEmbeddedItems() const { return mAllowEmbeddedItems; }

	// Autoreplace (formerly part of LLLineEditor)
	typedef boost::function<void(S32&, S32&, LLWString&, S32&, const LLWString&)> autoreplace_callback_t;
	autoreplace_callback_t mAutoreplaceCallback;
	void			setAutoreplaceCallback(autoreplace_callback_t cb) { mAutoreplaceCallback = cb; }

	/*virtual*/ void	onSpellCheckPerformed();

	//
	// Text manipulation
	//

	// inserts text at cursor
	void			insertText(const std::string &text);
	void			insertText(LLWString &text);

	void			appendWidget(const LLInlineViewSegment::Params& params, const std::string& text, bool allow_undo);
	// Non-undoable
	void			setText(const LLStringExplicit &utf8str, const LLStyle::Params& input_params = LLStyle::Params());


	// Removes text from the end of document
	// Does not change highlight or cursor position.
	void 			removeTextFromEnd(S32 num_chars);

	BOOL			tryToRevertToPristineState();

	void			setCursorAndScrollToEnd();

	void			getCurrentLineAndColumn( S32* line, S32* col, BOOL include_wordwrap );

	// Hacky methods to make it into a word-wrapping, potentially scrolling,
	// read-only text box.
	void			setCommitOnFocusLost(BOOL b)			{ mCommitOnFocusLost = b; }

	// Hack to handle Notecards
	virtual BOOL	importBuffer(const char* buffer, S32 length );
	virtual BOOL	exportBuffer(std::string& buffer );

	const LLUUID&	getSourceID() const						{ return mSourceID; }

	const LLTextSegmentPtr	getPreviousSegment() const;
    const LLTextSegmentPtr	getLastSegment() const;
	void			getSelectedSegments(segment_vec_t& segments) const;

	void			setShowContextMenu(bool show) { mShowContextMenu = show; }
	bool			getShowContextMenu() const { return mShowContextMenu; }

	void			setPassDelete(BOOL b) { mPassDelete = b; }

protected:
	void			showContextMenu(S32 x, S32 y);
	void			drawPreeditMarker();

	void 			assignEmbedded(const std::string &s);

	void			removeCharOrTab();

	void			indentSelectedLines( S32 spaces );
	S32				indentLine( S32 pos, S32 spaces );
	void			unindentLineBeforeCloseBrace();

	virtual	BOOL	handleSpecialKey(const KEY key, const MASK mask);
	BOOL			handleNavigationKey(const KEY key, const MASK mask);
	BOOL			handleSelectionKey(const KEY key, const MASK mask);
	BOOL			handleControlKey(const KEY key, const MASK mask);

	BOOL			selectionContainsLineBreaks();
	void			deleteSelection(BOOL transient_operation);

	S32				prevWordPos(S32 cursorPos) const;
	S32				nextWordPos(S32 cursorPos) const;

	void			autoIndent();

	void			findEmbeddedItemSegments(S32 start, S32 end);
	void			getSegmentsInRange(segment_vec_t& segments, S32 start, S32 end, bool include_partial) const;

	virtual llwchar	pasteEmbeddedItem(llwchar ext_char) { return ext_char; }


	// Here's the method that takes and applies text commands.
	S32 			execute(TextCmd* cmd);

	// Undoable operations
	void			addChar(llwchar c); // at mCursorPos
	S32				addChar(S32 pos, llwchar wc);
	void			addLineBreakChar(BOOL group_together = FALSE);
	S32				overwriteChar(S32 pos, llwchar wc);
	void			removeChar();
	S32 			removeChar(S32 pos);
	S32				insert(S32 pos, const LLWString &wstr, bool group_with_next_op, LLTextSegmentPtr segment);
	S32				remove(S32 pos, S32 length, bool group_with_next_op);

	void			focusLostHelper();
	void			updateAllowingLanguageInput();
	BOOL			hasPreeditString() const;

	// Overrides 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 void	getSelectionRange(S32 *position, S32 *length) const;
	virtual BOOL	getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect *bounds, LLRect *control) const;
	virtual S32		getPreeditFontSize() const;
	virtual LLWString getPreeditString() const { return getWText(); }
	//
	// Protected data
	//
	// Probably deserves serious thought to hiding as many of these
	// as possible behind protected accessor methods.
	//

	// Use these to determine if a click on an embedded item is a drag or not.
	S32				mMouseDownX;
	S32				mMouseDownY;

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

protected:
	LLUIColor			mDefaultColor;

	bool				mAutoIndent;
	bool				mParseOnTheFly;

	void				updateLinkSegments();
	void				keepSelectionOnReturn(bool keep) { mKeepSelectionOnReturn = keep; }
	class LLViewBorder*	mBorder;

private:
	//
	// Methods
	//
	void	        pasteHelper(bool is_primary);
	void			cleanStringForPaste(LLWString & clean_string);
	void			pasteTextWithLinebreaks(LLWString & clean_string);

	void			onKeyStroke();

	// Concrete TextCmd sub-classes used by the LLTextEditor base class
	class TextCmdInsert;
	class TextCmdAddChar;
	class TextCmdOverwriteChar;
	class TextCmdRemove;

	BOOL			mBaseDocIsPristine;
	TextCmd*		mPristineCmd;

	TextCmd*		mLastCmd;

	typedef std::deque<TextCmd*> undo_stack_t;
	undo_stack_t	mUndoStack;

	BOOL			mTabsToNextField;		// if true, tab moves focus to next field, else inserts spaces
	BOOL			mCommitOnFocusLost;
	BOOL			mTakesFocus;

	BOOL			mAllowEmbeddedItems;
	bool			mShowContextMenu;
	bool			mEnableTooltipPaste;
	bool			mPassDelete;
	bool			mKeepSelectionOnReturn;	// disabling of removing selected text after pressing of Enter

	LLUUID			mSourceID;

	LLCoordGL		mLastIMEPosition;		// Last position of the IME editor

	keystroke_signal_t mKeystrokeSignal;
	LLTextValidate::validate_func_t mPrevalidateFunc;

	LLHandle<LLContextMenu> mContextMenuHandle;
}; // end class LLTextEditor

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

#endif  // LL_TEXTEDITOR_H