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// Scintilla source code edit control
/** @file CallTip.h
** Interface to the call tip control.
**/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#ifndef CALLTIP_H
#define CALLTIP_H
namespace Scintilla {
struct Chunk {
size_t start;
size_t end;
constexpr Chunk(size_t start_=0, size_t end_=0) noexcept : start(start_), end(end_) {
assert(start <= end);
}
size_t Length() const noexcept;
};
/**
*/
class CallTip {
Chunk highlight; // character offset to start and end of highlighted text
std::string val;
std::shared_ptr<Font> font;
PRectangle rectUp; // rectangle of last up angle in the tip
PRectangle rectDown; // rectangle of last down arrow in the tip
int lineHeight; // vertical line spacing
int offsetMain; // The alignment point of the call tip
int tabSize; // Tab size in pixels, <=0 no TAB expand
bool useStyleCallTip; // if true, STYLE_CALLTIP should be used
bool above; // if true, display calltip above text
int DrawChunk(Surface *surface, int x, std::string_view sv,
int ytext, PRectangle rcClient, bool asHighlight, bool draw);
int PaintContents(Surface *surfaceWindow, bool draw);
bool IsTabCharacter(char ch) const noexcept;
int NextTabPos(int x) const noexcept;
public:
Window wCallTip;
Window wDraw;
bool inCallTipMode;
Sci::Position posStartCallTip;
ColourAlpha colourBG;
ColourAlpha colourUnSel;
ColourAlpha colourSel;
ColourAlpha colourShade;
ColourAlpha colourLight;
int codePage;
int clickPlace;
int insetX; // text inset in x from calltip border
int widthArrow;
int borderHeight;
int verticalOffset; // pixel offset up or down of the calltip with respect to the line
CallTip() noexcept;
// Deleted so CallTip objects can not be copied.
CallTip(const CallTip &) = delete;
CallTip(CallTip &&) = delete;
CallTip &operator=(const CallTip &) = delete;
CallTip &operator=(CallTip &&) = delete;
~CallTip();
void PaintCT(Surface *surfaceWindow);
void MouseClick(Point pt) noexcept;
/// Setup the calltip and return a rectangle of the area required.
PRectangle CallTipStart(Sci::Position pos, Point pt, int textHeight, const char *defn,
const char *faceName, int size, int codePage_,
int characterSet, int technology, const char *localeName,
const Window &wParent);
void CallTipCancel();
/// Set a range of characters to be displayed in a highlight style.
/// Commonly used to highlight the current parameter.
void SetHighlight(size_t start, size_t end);
/// Set the tab size in pixels for the call tip. 0 or -ve means no tab expand.
void SetTabSize(int tabSz) noexcept;
/// Set calltip position.
void SetPosition(bool aboveText) noexcept;
/// Used to determine which STYLE_xxxx to use for call tip information
bool UseStyleCallTip() const noexcept;
// Modify foreground and background colours
void SetForeBack(const ColourAlpha &fore, const ColourAlpha &back) noexcept;
};
}
#endif
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