479 lines
18 KiB
C++
479 lines
18 KiB
C++
/**
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* @file lltextbase.h
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* @author Martin Reddy
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* @brief The base class of text box/editor, providing Url handling support
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*
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* $LicenseInfo:firstyear=2009&license=viewergpl$
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*
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* Copyright (c) 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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#ifndef LL_LLTEXTBASE_H
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#define LL_LLTEXTBASE_H
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#include "v4color.h"
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#include "lleditmenuhandler.h"
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#include "llstyle.h"
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#include "llkeywords.h"
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#include "llpanel.h"
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#include <string>
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#include <set>
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#include <boost/signals2.hpp>
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class LLContextMenu;
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class LLTextSegment;
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typedef LLPointer<LLTextSegment> LLTextSegmentPtr;
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///
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/// The LLTextBase class provides a base class for all text fields, such
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/// as LLTextEditor and LLTextBox. It implements shared functionality
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/// such as Url highlighting and opening.
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///
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class LLTextBase
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: public LLUICtrl,
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protected LLEditMenuHandler
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{
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public:
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struct LineSpacingParams : public LLInitParam::Choice<LineSpacingParams>
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{
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Alternative<F32> multiple;
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Alternative<S32> pixels;
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LineSpacingParams();
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};
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struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
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{
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Optional<LLUIColor> cursor_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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Optional<bool> bg_visible,
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border_visible,
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track_end,
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read_only,
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allow_scroll,
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wrap,
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use_ellipses,
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allow_html,
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parse_highlights;
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Optional<S32> v_pad,
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h_pad;
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Optional<LineSpacingParams>
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line_spacing;
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Optional<S32> max_text_length;
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Optional<LLFontGL::ShadowType> font_shadow;
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Params();
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};
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// LLMouseHandler interface
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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 handleMiddleMouseDown(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleMiddleMouseUp(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleRightMouseUp(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 handleHover(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleScrollWheel(S32 x, S32 y, S32 clicks);
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/*virtual*/ BOOL handleToolTip(S32 x, S32 y, MASK mask);
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// LLView interface
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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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// LLUICtrl interface
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/*virtual*/ BOOL acceptsTextInput() const { return !mReadOnly; }
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/*virtual*/ void setColor( const LLColor4& c );
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/*virtual*/ void setValue(const LLSD& value );
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/*virtual*/ LLTextViewModel* getViewModel() const;
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// LLEditMenuHandler interface
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/*virtual*/ void deselect();
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// used by LLTextSegment layout code
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bool getWordWrap() { return mWordWrap; }
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bool getUseEllipses() { return mUseEllipses; }
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bool truncate(); // returns true of truncation occurred
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// TODO: move into LLTextSegment?
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void createUrlContextMenu(S32 x, S32 y, const std::string &url); // create a popup context menu for the given Url
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// Text accessors
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// TODO: add optional style parameter
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virtual void setText(const LLStringExplicit &utf8str); // uses default style
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virtual std::string getText() const;
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// wide-char versions
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void setWText(const LLWString& text);
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LLWString getWText() const;
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void appendText(const std::string &new_text, bool prepend_newline, const LLStyle::Params& input_params = LLStyle::Params());
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S32 getLength() const { return getWText().length(); }
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S32 getLineCount() const { return mLineInfoList.size(); }
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void addDocumentChild(LLView* view);
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void removeDocumentChild(LLView* view);
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const LLView* getDocumentView() const { return mDocumentView; }
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LLRect getTextRect() { return mTextRect; }
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LLRect getContentsRect();
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LLRect getVisibleDocumentRect() const;
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S32 getDocIndexFromLocalCoord( S32 local_x, S32 local_y, BOOL round ) const;
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LLRect getLocalRectFromDocIndex(S32 pos) const;
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void setReadOnly(bool read_only) { mReadOnly = read_only; }
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bool getReadOnly() { return mReadOnly; }
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// cursor manipulation
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bool setCursor(S32 row, S32 column);
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bool setCursorPos(S32 cursor_pos, bool keep_cursor_offset = false);
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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 changePage( S32 delta );
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void changeLine( S32 delta );
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const LLFontGL* getDefaultFont() const { return mDefaultFont; }
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public:
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// Fired when a URL link is clicked
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commit_signal_t mURLClickSignal;
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protected:
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// helper structs
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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<LLTextSegmentPtr> segment_vec_t;
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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 TextCmd
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{
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public:
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TextCmd( 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 ~TextCmd() {}
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virtual BOOL execute(LLTextBase* editor, S32* delta) = 0;
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virtual S32 undo(LLTextBase* editor) = 0;
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virtual S32 redo(LLTextBase* 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( LLTextBase* 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(LLTextBase* editor, S32 pos, const LLWString &wstr) { return editor->insertStringNoUndo( pos, wstr, &mSegments ); }
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S32 remove(LLTextBase* editor, S32 pos, S32 length) { return editor->removeStringNoUndo( pos, length ); }
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S32 overwrite(LLTextBase* 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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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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typedef std::multiset<LLTextSegmentPtr, compare_segment_end> segment_set_t;
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// protected member variables
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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, LLRect rect, S32 line_num);
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S32 mDocIndexStart;
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S32 mDocIndexEnd;
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LLRect mRect;
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S32 mLineNum; // actual line count (ignoring soft newlines due to word wrap)
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};
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typedef std::vector<line_info> line_list_t;
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// member functions
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LLTextBase(const Params &p);
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virtual ~LLTextBase();
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void initFromParams(const Params& p);
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LLStyle::Params getDefaultStyle();
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virtual void onValueChange(S32 start, S32 end);
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// draw methods
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void drawSelectionBackground(); // draws the black box behind the selected text
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void drawCursor();
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void drawText();
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// modify contents
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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 appendAndHighlightText(const std::string &new_text, bool prepend_newline, S32 highlight_part, const LLStyle::Params& stylep);
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// manage segments
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void getSegmentAndOffset( S32 startpos, segment_set_t::const_iterator* seg_iter, S32* offsetp ) const;
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void getSegmentAndOffset( S32 startpos, segment_set_t::iterator* seg_iter, S32* offsetp );
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LLTextSegmentPtr getSegmentAtLocalPos( S32 x, S32 y );
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segment_set_t::iterator getSegIterContaining(S32 index);
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segment_set_t::const_iterator getSegIterContaining(S32 index) const;
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void clearSegments();
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void createDefaultSegment();
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virtual void updateSegments();
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void insertSegment(LLTextSegmentPtr segment_to_insert);
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// manage lines
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S32 getLineStart( S32 line ) const;
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S32 getLineEnd( S32 line ) const;
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S32 getLineNumFromDocIndex( S32 doc_index, bool include_wordwrap = true) const;
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S32 getLineOffsetFromDocIndex( S32 doc_index, bool include_wordwrap = true) const;
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S32 getFirstVisibleLine() const;
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std::pair<S32, S32> getVisibleLines(bool fully_visible = false);
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S32 getLeftOffset(S32 width);
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void reflow(S32 start_index = 0);
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// cursor
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void updateCursorXPos();
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void setCursorAtLocalPos( S32 local_x, S32 local_y, bool round, bool keep_cursor_offset=false );
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S32 getEditableIndex(S32 index, bool increasing_direction); // constraint cursor to editable segments of document
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void resetCursorBlink() { mCursorBlinkTimer.reset(); }
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void updateScrollFromCursor();
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// text selection
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bool hasSelection() const { return (mSelectionStart !=mSelectionEnd); }
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void startSelection();
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void endSelection();
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// misc
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void updateTextRect();
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void needsReflow() { mReflowNeeded = TRUE; }
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void needsScroll() { mScrollNeeded = TRUE; }
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void replaceUrlLabel(const std::string &url, const std::string &label);
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protected:
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// text segmentation and flow
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segment_set_t mSegments;
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line_list_t mLineInfoList;
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LLRect mTextRect; // The rect in which text is drawn. Excludes borders.
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LLRect mContentsRect;
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// colors
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LLUIColor mCursorColor;
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LLUIColor mFgColor;
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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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// cursor
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S32 mCursorPos; // I-beam is just after the mCursorPos-th character.
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S32 mDesiredXPixel; // X pixel position where the user wants the cursor to be
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LLFrameTimer mCursorBlinkTimer; // timer that controls cursor blinking
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// selection
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S32 mSelectionStart;
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S32 mSelectionEnd;
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BOOL mIsSelecting; // Are we in the middle of a drag-select?
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// configuration
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S32 mHPad; // padding on left of text
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S32 mVPad; // padding above text
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LLFontGL::HAlign mHAlign;
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F32 mLineSpacingMult; // multiple of line height used as space for a single line of text (e.g. 1.5 to get 50% padding)
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S32 mLineSpacingPixels; // padding between lines
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const LLFontGL* mDefaultFont; // font that is used when none specified
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LLFontGL::ShadowType mFontShadow;
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bool mBorderVisible;
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bool mParseHTML; // make URLs interactive
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bool mParseHighlights; // highlight user-defined keywords
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bool mWordWrap;
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bool mUseEllipses;
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bool mTrackEnd; // if true, keeps scroll position at end of document during resize
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bool mReadOnly;
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bool mBGVisible; // render background?
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S32 mMaxTextByteLength; // Maximum length mText is allowed to be in bytes
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// support widgets
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LLContextMenu* mPopupMenu;
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LLView* mDocumentView;
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class LLScrollContainer* mScroller;
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// transient state
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bool mReflowNeeded; // need to reflow text because of change to text contents or display region
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bool mScrollNeeded; // need to change scroll region because of change to cursor position
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S32 mScrollIndex; // index of first character to keep visible in scroll region
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};
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///
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/// A text segment is used to specify a subsection of a text string
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/// that should be formatted differently, such as a hyperlink. It
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/// includes a start/end offset from the start of the string, a
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/// style to render with, an optional tooltip, etc.
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///
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class LLTextSegment : public LLRefCount, public LLMouseHandler
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{
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public:
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LLTextSegment(S32 start, S32 end) : mStart(start), mEnd(end){};
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virtual ~LLTextSegment();
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virtual S32 getWidth(S32 first_char, S32 num_chars) const;
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virtual S32 getOffset(S32 segment_local_x_coord, S32 start_offset, S32 num_chars, bool round) 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;
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virtual void unlinkFromDocument(class LLTextBase* editor);
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virtual void linkToDocument(class LLTextBase* editor);
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virtual const LLColor4& getColor() const;
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virtual void setColor(const LLColor4 &color);
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virtual const LLStyleSP getStyle() const;
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virtual void setStyle(const LLStyleSP &style);
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virtual void setToken( LLKeywordToken* token );
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virtual LLKeywordToken* getToken() const;
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virtual void setToolTip(const std::string& tooltip);
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virtual void dump() const;
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// LLMouseHandler interface
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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 handleMiddleMouseDown(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleMiddleMouseUp(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleRightMouseUp(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 handleHover(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleScrollWheel(S32 x, S32 y, S32 clicks);
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/*virtual*/ BOOL handleToolTip(S32 x, S32 y, MASK mask);
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/*virtual*/ std::string getName() const;
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/*virtual*/ void onMouseCaptureLost();
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/*virtual*/ void screenPointToLocal(S32 screen_x, S32 screen_y, S32* local_x, S32* local_y) const;
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/*virtual*/ void localPointToScreen(S32 local_x, S32 local_y, S32* screen_x, S32* screen_y) const;
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/*virtual*/ BOOL hasMouseCapture();
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S32 getStart() const { return mStart; }
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void setStart(S32 start) { mStart = start; }
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S32 getEnd() const { return mEnd; }
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void setEnd( S32 end ) { mEnd = end; }
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protected:
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S32 mStart;
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S32 mEnd;
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};
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class LLNormalTextSegment : public LLTextSegment
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{
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public:
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LLNormalTextSegment( const LLStyleSP& style, S32 start, S32 end, LLTextBase& editor );
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LLNormalTextSegment( const LLColor4& color, S32 start, S32 end, LLTextBase& editor, BOOL is_visible = TRUE);
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/*virtual*/ S32 getWidth(S32 first_char, S32 num_chars) const;
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/*virtual*/ S32 getOffset(S32 segment_local_x_coord, S32 start_offset, S32 num_chars, bool round) 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*/ 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 true; }
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/*virtual*/ const LLColor4& getColor() const { return mStyle->getColor(); }
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/*virtual*/ void setColor(const LLColor4 &color) { mStyle->setColor(color); }
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/*virtual*/ const LLStyleSP getStyle() const { return mStyle; }
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/*virtual*/ void setStyle(const LLStyleSP &style) { mStyle = style; }
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/*virtual*/ void setToken( LLKeywordToken* token ) { mToken = token; }
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/*virtual*/ LLKeywordToken* getToken() const { return mToken; }
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/*virtual*/ BOOL getToolTip( std::string& msg ) const;
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/*virtual*/ void setToolTip(const std::string& tooltip);
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/*virtual*/ void dump() const;
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/*virtual*/ BOOL handleHover(S32 x, S32 y, MASK mask);
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/*virtual*/ BOOL handleRightMouseDown(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 handleToolTip(S32 x, S32 y, MASK mask);
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protected:
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F32 drawClippedSegment(S32 seg_start, S32 seg_end, S32 selection_start, S32 selection_end, LLRect rect);
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protected:
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class LLTextBase& mEditor;
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LLStyleSP mStyle;
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S32 mMaxHeight;
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LLKeywordToken* mToken;
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std::string mTooltip;
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};
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class LLIndexSegment : public LLTextSegment
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{
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public:
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LLIndexSegment(S32 pos) : LLTextSegment(pos, pos) {}
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};
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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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#endif
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