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/**
* @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
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2009, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#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 <boost/function.hpp>
class LLFontGL;
class LLLineEditorRollback;
class LLButton;
class LLContextMenu;
typedef boost::function<BOOL (const LLWString &wstr)> LLLinePrevalidateFunc;
class LLLineEditor
: public LLUICtrl, public LLEditMenuHandler, protected LLPreeditor
{
public:
struct PrevalidateNamedFuncs
: public LLInitParam::TypeValuesHelper<LLLinePrevalidateFunc, PrevalidateNamedFuncs>
{
static void declareValues();
};
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<LLLinePrevalidateFunc, PrevalidateNamedFuncs> prevalidate_callback;
Optional<LLViewBorder::Params> border;
Optional<LLUIImage*> background_image,
background_image_disabled,
background_image_focused;
Optional<bool> select_on_focus,
handle_edit_keys_directly,
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(); }
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 setHandleEditKeysDirectly( BOOL b ) { mHandleEditKeysDirectly = b; }
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( LLLinePrevalidateFunc func );
static BOOL prevalidateFloat(const LLWString &str );
static BOOL prevalidateInt(const LLWString &str );
static BOOL prevalidatePositiveS32(const LLWString &str);
static BOOL prevalidateNonNegativeS32(const LLWString &str);
static BOOL prevalidateAlphaNum(const LLWString &str );
static BOOL prevalidateAlphaNumSpace(const LLWString &str );
static BOOL prevalidateASCIIPrintableNoPipe(const LLWString &str);
static BOOL prevalidateASCIIPrintableNoSpace(const LLWString &str);
static BOOL prevalidateASCII(const LLWString &str);
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;
void reportBadKeystroke();
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;
LLLinePrevalidateFunc 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 mHandleEditKeysDirectly; // If true, the standard edit keys (Ctrl-X, Delete, etc,) are handled here instead of routed by the menu system
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_
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