583 lines
18 KiB
C++
583 lines
18 KiB
C++
/**
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* @file lltexteditor.h
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* @brief LLTextEditor base class
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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// Text editor widget to let users enter a a multi-line ASCII document//
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#ifndef LL_LLTEXTEDITOR_H
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#define LL_LLTEXTEDITOR_H
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#include "llrect.h"
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#include "llkeywords.h"
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#include "lluictrl.h"
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#include "llframetimer.h"
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#include "lldarray.h"
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#include "llstyle.h"
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#include "lleditmenuhandler.h"
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#include "lldarray.h"
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#include "llviewborder.h" // for params
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#include "lltextbase.h"
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#include "llpreeditor.h"
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#include "llcontrol.h"
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class LLFontGL;
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class LLScrollbar;
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class LLKeywordToken;
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class LLTextCmd;
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class LLUICtrlFactory;
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class LLScrollContainer;
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class LLInlineViewSegment : public LLTextSegment
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{
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public:
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LLInlineViewSegment(LLView* widget, S32 start, S32 end);
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~LLInlineViewSegment();
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/*virtual*/ S32 getWidth(S32 first_char, S32 num_chars) const;
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/*virtual*/ S32 getNumChars(S32 num_pixels, S32 segment_offset, S32 line_offset, S32 max_chars) const;
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/*virtual*/ void updateLayout(const class LLTextBase& editor);
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/*virtual*/ F32 draw(S32 start, S32 end, S32 selection_start, S32 selection_end, const LLRect& draw_rect);
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/*virtuaL*/ S32 getMaxHeight() const;
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/*virtual*/ bool canEdit() const { return false; }
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/*virtual*/ void unlinkFromDocument(class LLTextBase* editor);
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/*virtual*/ void linkToDocument(class LLTextBase* editor);
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private:
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LLView* mView;
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};
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class LLTextEditor :
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public LLTextBase,
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public LLUICtrl,
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private LLEditMenuHandler,
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protected LLPreeditor
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{
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public:
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struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
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{
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Optional<std::string> default_text;
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Optional<S32> max_text_length;
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Optional<bool> read_only,
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embedded_items,
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word_wrap,
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ignore_tab,
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hide_border,
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track_bottom,
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handle_edit_keys_directly,
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show_line_numbers,
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commit_on_focus_lost;
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//colors
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Optional<LLUIColor> cursor_color,
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default_color,
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text_color,
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text_readonly_color,
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bg_readonly_color,
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bg_writeable_color,
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bg_focus_color,
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link_color;
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Optional<LLViewBorder::Params> border;
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Ignored type,
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length,
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is_unicode,
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hide_scrollbar;
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Params();
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};
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void initFromParams(const Params&);
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protected:
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LLTextEditor(const Params&);
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friend class LLUICtrlFactory;
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public:
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//
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// Constants
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//
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static const llwchar FIRST_EMBEDDED_CHAR = 0x100000;
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static const llwchar LAST_EMBEDDED_CHAR = 0x10ffff;
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static const S32 MAX_EMBEDDED_ITEMS = LAST_EMBEDDED_CHAR - FIRST_EMBEDDED_CHAR + 1;
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struct compare_segment_end
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{
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bool operator()(const LLTextSegmentPtr& a, const LLTextSegmentPtr& b) const
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{
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return a->getEnd() < b->getEnd();
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}
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};
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virtual ~LLTextEditor();
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typedef boost::signals2::signal<void (LLTextEditor* caller)> keystroke_signal_t;
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void setKeystrokeCallback(const keystroke_signal_t::slot_type& callback);
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void setParseHighlights(BOOL parsing) {mParseHighlights=parsing;}
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// mousehandler overrides
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virtual BOOL handleMouseDown(S32 x, S32 y, MASK mask);
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virtual BOOL handleMouseUp(S32 x, S32 y, MASK mask);
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virtual BOOL handleHover(S32 x, S32 y, MASK mask);
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virtual BOOL handleDoubleClick(S32 x, S32 y, MASK mask );
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virtual BOOL handleMiddleMouseDown(S32 x,S32 y,MASK mask);
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virtual BOOL handleKeyHere(KEY key, MASK mask );
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virtual BOOL handleUnicodeCharHere(llwchar uni_char);
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virtual BOOL handleToolTip(S32 x, S32 y, std::string& msg, LLRect& sticky_rect);
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virtual BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
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EDragAndDropType cargo_type, void *cargo_data,
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EAcceptance *accept, std::string& tooltip_msg);
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virtual void onMouseCaptureLost();
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// view overrides
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virtual void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
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virtual void draw();
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virtual void onFocusReceived();
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virtual void onFocusLost();
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virtual void onCommit();
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virtual void setEnabled(BOOL enabled);
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// uictrl overrides
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virtual void clear();
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virtual void setFocus( BOOL b );
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virtual BOOL acceptsTextInput() const;
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virtual BOOL isDirty() const;
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virtual void setValue(const LLSD& value);
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// LLEditMenuHandler interface
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virtual void undo();
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virtual BOOL canUndo() const;
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virtual void redo();
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virtual BOOL canRedo() const;
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virtual void cut();
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virtual BOOL canCut() const;
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virtual void copy();
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virtual BOOL canCopy() const;
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virtual void paste();
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virtual BOOL canPaste() const;
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virtual void updatePrimary();
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virtual void copyPrimary();
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virtual void pastePrimary();
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virtual BOOL canPastePrimary() const;
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virtual void doDelete();
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virtual BOOL canDoDelete() const;
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virtual void selectAll();
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virtual BOOL canSelectAll() const;
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virtual void deselect();
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virtual BOOL canDeselect() const;
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virtual void onValueChange(S32 start, S32 end);
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void selectNext(const std::string& search_text_in, BOOL case_insensitive, BOOL wrap = TRUE);
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BOOL replaceText(const std::string& search_text, const std::string& replace_text, BOOL case_insensitive, BOOL wrap = TRUE);
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void replaceTextAll(const std::string& search_text, const std::string& replace_text, BOOL case_insensitive);
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BOOL hasSelection() const { return (mSelectionStart !=mSelectionEnd); }
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void replaceUrlLabel(const std::string &url, const std::string &label);
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// Undo/redo stack
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void blockUndo();
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// Text editing
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virtual void makePristine();
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BOOL isPristine() const;
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BOOL allowsEmbeddedItems() const { return mAllowEmbeddedItems; }
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S32 getLength() const { return getWText().length(); }
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void setReadOnly(bool read_only) { mReadOnly = read_only; }
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bool getReadOnly() { return mReadOnly; }
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//
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// Text manipulation
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//
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// inserts text at cursor
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void insertText(const std::string &text);
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// appends text at end
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void appendText(const std::string &wtext, bool allow_undo, bool prepend_newline,
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const LLStyle::Params& style = LLStyle::Params());
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void appendColoredText(const std::string &wtext, bool allow_undo,
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bool prepend_newline,
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const LLColor4 &color,
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const std::string& font_name = LLStringUtil::null);
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// if styled text starts a line, you need to prepend a newline.
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void appendStyledText(const std::string &new_text, bool allow_undo,
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bool prepend_newline,
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const LLStyle::Params& style);
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void appendHighlightedText(const std::string &new_text, bool allow_undo,
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bool prepend_newline, S32 highlight_part,
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const LLStyle::Params& style);
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void appendWidget(LLView* widget, const std::string &widget_text, bool allow_undo, bool prepend_newline);
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// Non-undoable
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void setText(const LLStringExplicit &utf8str);
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void setWText(const LLWString &wtext);
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// Removes text from the end of document
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// Does not change highlight or cursor position.
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void removeTextFromEnd(S32 num_chars);
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BOOL tryToRevertToPristineState();
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bool setCursor(S32 row, S32 column);
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bool setCursorPos(S32 offset, bool keep_cursor_offset = false);
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void setCursorAndScrollToEnd();
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void getLineAndColumnForPosition( S32 position, S32* line, S32* col, BOOL include_wordwrap );
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void getCurrentLineAndColumn( S32* line, S32* col, BOOL include_wordwrap );
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S32 getLineForPosition(S32 position);
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S32 getCurrentLine();
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void loadKeywords(const std::string& filename,
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const std::vector<std::string>& funcs,
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const std::vector<std::string>& tooltips,
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const LLColor3& func_color);
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LLKeywords::keyword_iterator_t keywordsBegin() { return mKeywords.begin(); }
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LLKeywords::keyword_iterator_t keywordsEnd() { return mKeywords.end(); }
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// Hacky methods to make it into a word-wrapping, potentially scrolling,
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// read-only text box.
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void setCommitOnFocusLost(BOOL b) { mCommitOnFocusLost = b; }
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// Hack to handle Notecards
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virtual BOOL importBuffer(const char* buffer, S32 length );
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virtual BOOL exportBuffer(std::string& buffer );
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const class DocumentPanel* getDocumentPanel() const { return mDocumentPanel; }
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const LLUUID& getSourceID() const { return mSourceID; }
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// Callbacks
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std::string getText() const;
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// Callback for when a Url has been resolved by the server
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void onUrlLabelUpdated(const std::string &url, const std::string &label);
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// Getters
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LLWString getWText() const;
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llwchar getWChar(S32 pos) const { return getWText()[pos]; }
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LLWString getWSubString(S32 pos, S32 len) const { return getWText().substr(pos, len); }
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typedef std::vector<LLTextSegmentPtr> segment_vec_t;
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const LLTextSegmentPtr getPreviousSegment() const;
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void getSelectedSegments(segment_vec_t& segments) const;
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void getSegmentsInRange(segment_vec_t& segments, S32 start, S32 end, bool include_partial) const;
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LLRect getLocalRectFromDocIndex(S32 index) const;
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void addDocumentChild(LLView* view);
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void removeDocumentChild(LLView* view);
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protected:
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// Change cursor
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void startOfLine();
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void endOfLine();
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void startOfDoc();
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void endOfDoc();
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void drawPreeditMarker();
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void needsReflow() { mReflowNeeded = TRUE; }
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void needsScroll() { mScrollNeeded = TRUE; }
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void updateCursorXPos();
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void updateScrollFromCursor();
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void updateTextRect();
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const LLRect& getTextRect() const { return mTextRect; }
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void assignEmbedded(const std::string &s);
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BOOL truncate(); // Returns true if truncation occurs
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void removeCharOrTab();
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void setCursorAtLocalPos(S32 x, S32 y, bool round, bool keep_cursor_offset = false);
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/*virtual*/ S32 getDocIndexFromLocalCoord( S32 local_x, S32 local_y, BOOL round ) const;
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void indentSelectedLines( S32 spaces );
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S32 indentLine( S32 pos, S32 spaces );
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void unindentLineBeforeCloseBrace();
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void reportBadKeystroke() { make_ui_sound("UISndBadKeystroke"); }
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BOOL handleNavigationKey(const KEY key, const MASK mask);
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BOOL handleSpecialKey(const KEY key, const MASK mask, BOOL* return_key_hit);
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BOOL handleSelectionKey(const KEY key, const MASK mask);
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BOOL handleControlKey(const KEY key, const MASK mask);
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BOOL handleEditKey(const KEY key, const MASK mask);
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BOOL selectionContainsLineBreaks();
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void startSelection();
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void endSelection();
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void deleteSelection(BOOL transient_operation);
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S32 prevWordPos(S32 cursorPos) const;
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S32 nextWordPos(S32 cursorPos) const;
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S32 getLineCount() const { return mLineInfoList.size(); }
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S32 getLineStart( S32 line ) const;
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S32 getLineHeight( S32 line ) const;
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void getLineAndOffset(S32 pos, S32* linep, S32* offsetp, bool include_wordwrap = true) const;
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S32 getPos(S32 line, S32 offset);
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void changePage(S32 delta);
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void changeLine(S32 delta);
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void autoIndent();
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void findEmbeddedItemSegments(S32 start, S32 end);
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void insertSegment(LLTextSegmentPtr segment_to_insert);
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virtual llwchar pasteEmbeddedItem(llwchar ext_char) { return ext_char; }
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// Abstract inner base class representing an undoable editor command.
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// Concrete sub-classes can be defined for operations such as insert, remove, etc.
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// Used as arguments to the execute() method below.
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class LLTextCmd
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{
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public:
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LLTextCmd( S32 pos, BOOL group_with_next, LLTextSegmentPtr segment = LLTextSegmentPtr() )
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: mPos(pos),
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mGroupWithNext(group_with_next)
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{
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if (segment.notNull())
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{
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mSegments.push_back(segment);
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}
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}
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virtual ~LLTextCmd() {}
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virtual BOOL execute(LLTextEditor* editor, S32* delta) = 0;
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virtual S32 undo(LLTextEditor* editor) = 0;
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virtual S32 redo(LLTextEditor* editor) = 0;
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virtual BOOL canExtend(S32 pos) const { return FALSE; }
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virtual void blockExtensions() {}
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virtual BOOL extendAndExecute( LLTextEditor* editor, S32 pos, llwchar c, S32* delta ) { llassert(0); return 0; }
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virtual BOOL hasExtCharValue( llwchar value ) const { return FALSE; }
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// Defined here so they can access protected LLTextEditor editing methods
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S32 insert(LLTextEditor* editor, S32 pos, const LLWString &wstr) { return editor->insertStringNoUndo( pos, wstr, &mSegments ); }
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S32 remove(LLTextEditor* editor, S32 pos, S32 length) { return editor->removeStringNoUndo( pos, length ); }
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S32 overwrite(LLTextEditor* editor, S32 pos, llwchar wc) { return editor->overwriteCharNoUndo(pos, wc); }
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S32 getPosition() const { return mPos; }
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BOOL groupWithNext() const { return mGroupWithNext; }
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protected:
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const S32 mPos;
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BOOL mGroupWithNext;
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segment_vec_t mSegments;
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};
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// Here's the method that takes and applies text commands.
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S32 execute(LLTextCmd* cmd);
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// Undoable operations
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void addChar(llwchar c); // at mCursorPos
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S32 addChar(S32 pos, llwchar wc);
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S32 overwriteChar(S32 pos, llwchar wc);
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void removeChar();
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S32 removeChar(S32 pos);
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S32 insert(S32 pos, const LLWString &wstr, bool group_with_next_op, LLTextSegmentPtr segment);
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S32 remove(S32 pos, S32 length, bool group_with_next_op);
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S32 append(const LLWString &wstr, bool group_with_next_op, LLTextSegmentPtr segment);
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// Direct operations
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S32 insertStringNoUndo(S32 pos, const LLWString &wstr, segment_vec_t* segments = NULL); // returns num of chars actually inserted
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S32 removeStringNoUndo(S32 pos, S32 length);
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S32 overwriteCharNoUndo(S32 pos, llwchar wc);
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void resetKeystrokeTimer() { mKeystrokeTimer.reset(); }
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void updateAllowingLanguageInput();
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BOOL hasPreeditString() const;
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// Overrides LLPreeditor
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virtual void resetPreedit();
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virtual void updatePreedit(const LLWString &preedit_string,
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const segment_lengths_t &preedit_segment_lengths, const standouts_t &preedit_standouts, S32 caret_position);
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virtual void markAsPreedit(S32 position, S32 length);
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virtual void getPreeditRange(S32 *position, S32 *length) const;
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virtual void getSelectionRange(S32 *position, S32 *length) const;
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virtual BOOL getPreeditLocation(S32 query_offset, LLCoordGL *coord, LLRect *bounds, LLRect *control) const;
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virtual S32 getPreeditFontSize() const;
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//
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// Protected data
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//
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// Probably deserves serious thought to hiding as many of these
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// as possible behind protected accessor methods.
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//
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// I-beam is just after the mCursorPos-th character.
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S32 mCursorPos;
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// Use these to determine if a click on an embedded item is a drag or not.
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S32 mMouseDownX;
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S32 mMouseDownY;
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// Are we in the middle of a drag-select? To figure out if there is a current
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// selection, call hasSelection().
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BOOL mIsSelecting;
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S32 mSelectionStart;
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S32 mSelectionEnd;
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S32 mLastSelectionX;
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S32 mLastSelectionY;
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BOOL mParseHighlights;
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// Scrollbar data
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class DocumentPanel* mDocumentPanel;
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LLScrollContainer* mScroller;
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void *mOnScrollEndData;
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LLWString mPreeditWString;
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LLWString mPreeditOverwrittenWString;
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std::vector<S32> mPreeditPositions;
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std::vector<BOOL> mPreeditStandouts;
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S32 mScrollIndex; // index into document that controls default scroll position
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protected:
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LLUIColor mCursorColor;
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LLUIColor mFgColor;
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LLUIColor mDefaultColor;
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LLUIColor mReadOnlyFgColor;
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LLUIColor mWriteableBgColor;
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LLUIColor mReadOnlyBgColor;
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LLUIColor mFocusBgColor;
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LLUIColor mLinkColor;
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BOOL mReadOnly;
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BOOL mShowLineNumbers;
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void updateSegments();
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void updateLinkSegments();
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private:
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//
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// Methods
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//
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void pasteHelper(bool is_primary);
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virtual LLTextViewModel* getViewModel() const;
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void reflow(S32 startpos = 0);
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void createDefaultSegment();
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LLStyleSP getDefaultStyle();
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S32 getEditableIndex(S32 index, bool increasing_direction);
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void drawBackground();
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void drawSelectionBackground();
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void drawCursor();
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void drawText();
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void drawLineNumbers();
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S32 getFirstVisibleLine() const;
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void onKeyStroke();
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//
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// Data
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//
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LLKeywords mKeywords;
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// Concrete LLTextCmd sub-classes used by the LLTextEditor base class
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class LLTextCmdInsert;
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class LLTextCmdAddChar;
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class LLTextCmdOverwriteChar;
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class LLTextCmdRemove;
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S32 mMaxTextByteLength; // Maximum length mText is allowed to be in bytes
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class LLViewBorder* mBorder;
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BOOL mBaseDocIsPristine;
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LLTextCmd* mPristineCmd;
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LLTextCmd* mLastCmd;
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typedef std::deque<LLTextCmd*> undo_stack_t;
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undo_stack_t mUndoStack;
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S32 mDesiredXPixel; // X pixel position where the user wants the cursor to be
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LLRect mTextRect; // The rect in which text is drawn. Excludes borders.
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// List of offsets and segment index of the start of each line. Always has at least one node (0).
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|
struct line_info
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{
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line_info(S32 index_start, S32 index_end, S32 top, S32 bottom, S32 line_num)
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: mDocIndexStart(index_start),
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mDocIndexEnd(index_end),
|
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mTop(top),
|
|
mBottom(bottom),
|
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mLineNum(line_num)
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{}
|
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S32 mDocIndexStart;
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S32 mDocIndexEnd;
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S32 mTop;
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S32 mBottom;
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S32 mLineNum; // actual line count (ignoring soft newlines due to word wrap)
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};
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struct compare_bottom;
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struct compare_top;
|
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struct line_end_compare;
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typedef std::vector<line_info> line_list_t;
|
|
line_list_t mLineInfoList;
|
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BOOL mReflowNeeded;
|
|
BOOL mScrollNeeded;
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LLFrameTimer mKeystrokeTimer;
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BOOL mTabsToNextField; // if true, tab moves focus to next field, else inserts spaces
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BOOL mCommitOnFocusLost;
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BOOL mTakesFocus;
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|
BOOL mTrackBottom; // if true, keeps scroll position at bottom during resize
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|
BOOL mAllowEmbeddedItems;
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LLUUID mSourceID;
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// If true, the standard edit keys (Ctrl-X, Delete, etc,) are handled here
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|
//instead of routed by the menu system
|
|
BOOL mHandleEditKeysDirectly;
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|
LLCoordGL mLastIMEPosition; // Last position of the IME editor
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|
keystroke_signal_t mKeystrokeSignal;
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|
}; // end class LLTextEditor
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#endif // LL_TEXTEDITOR_
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