platwx.cpp

非常好用的可移植的多平台C/C++源代码编辑器

// Scintilla source code edit control
// PlatWX.cxx - implementation of platform facilities on wxWidgets
// Copyright 1998-1999 by Neil Hodgson <[e-mail]>
//                        Robin Dunn <[e-mail]>
// The License.txt file describes the conditions under which this software may be distributed.

#include <ctype.h>

#include <wx/wx.h>
#include <wx/encconv.h>
#include <wx/listctrl.h>
#include <wx/mstream.h>
#include <wx/image.h>
#include <wx/imaglist.h>

#include "Platform.h"
#include "PlatWX.h"
#include "wx/wxscintilla.h"


Point Point::FromLong(long lpoint) {
    return Point(lpoint & 0xFFFF, lpoint >> 16);
}

wxRect wxRectFromPRectangle(PRectangle prc) {
    wxRect r(prc.left, prc.top,
             prc.Width(), prc.Height());
    return r;
}
PRectangle PRectangleFromwxRect(wxRect rc) {
    return PRectangle(rc.GetLeft(), rc.GetTop(),
                      rc.GetRight()+1, rc.GetBottom()+1);
}

wxColour wxColourFromCA(const ColourAllocated& ca) {
    ColourDesired cd(ca.AsLong());
    return wxColour((unsigned char)cd.GetRed(),
                    (unsigned char)cd.GetGreen(),
                    (unsigned char)cd.GetBlue());
}

//----------------------------------------------------------------------

Palette::Palette() {
    used = 0;
    allowRealization = false;
}

Palette::~Palette() {
    Release();
}

void Palette::Release() {
    used = 0;
}

// This method either adds a colour to the list of wanted colours (want==true)
// or retrieves the allocated colour back to the ColourPair.
// This is one method to make it easier to keep the code for wanting and retrieving in sync.
void Palette::WantFind(ColourPair &cp, bool want) {
    if (want) {
        for (int i=0; i < used; i++) {
            if (entries[i].desired == cp.desired)
                return;
        }

        if (used < numEntries) {
            entries[used].desired = cp.desired;
            entries[used].allocated.Set(cp.desired.AsLong());
            used++;
        }
    } else {
        for (int i=0; i < used; i++) {
            if (entries[i].desired == cp.desired) {
                cp.allocated = entries[i].allocated;
                return;
            }
        }
        cp.allocated.Set(cp.desired.AsLong());
    }
}

void Palette::Allocate(Window &) {
    if (allowRealization) {
    }
}


//----------------------------------------------------------------------

Font::Font() {
    id = 0;
    ascent = 0;
}

Font::~Font() {
}

void Font::Create (const char *faceName, int characterSet, int size,
                   bool bold, bool italic, bool extraFontFlag) {
    Release();

    // The minus one is done because since Scintilla uses SC_SHARSET_DEFAULT
    // internally and we need to have wxFONENCODING_DEFAULT == SC_SHARSET_DEFAULT
    // so we adjust the encoding before passing it to Scintilla.  See also
    // wxScintilla::StyleSetCharacterSet
    wxFontEncoding encoding = (wxFontEncoding)(characterSet-1);

    wxFontEncodingArray ea = wxEncodingConverter::GetPlatformEquivalents(encoding);
    if (ea.GetCount()) encoding = ea[0];

    wxFont* font = new wxFont (size, wxDEFAULT,
                               italic ? wxITALIC :  wxNORMAL,
                               bold ? wxBOLD : wxNORMAL,
                               false,
                               sci2wx(faceName),
                               encoding);
    font->SetNoAntiAliasing (!extraFontFlag);
    id = font;
}


void Font::Release() {
    if (id)
        delete (wxFont*)id;
    id = 0;
}

//----------------------------------------------------------------------

class SurfaceImpl : public Surface {
private:
    wxDC*       hdc;
    bool        hdcOwned;
    wxBitmap*   bitmap;
    int         x;
    int         y;
    bool        unicodeMode;

public:
    SurfaceImpl();
    ~SurfaceImpl();

    virtual void Init(WindowID wid);
    virtual void Init(SurfaceID sid, WindowID wid);
    virtual void InitPixMap(int width, int height, Surface *surface_, WindowID wid);

    virtual void Release();
    virtual bool Initialised();
    virtual void PenColour(ColourAllocated fore);
    virtual int LogPixelsY();
    virtual int DeviceHeightFont(int points);
    virtual void MoveTo(int x_, int y_);
    virtual void LineTo(int x_, int y_);
    virtual void Polygon(Point *pts, int npts, ColourAllocated fore, ColourAllocated back);
    virtual void RectangleDraw(PRectangle rc, ColourAllocated fore, ColourAllocated back);
    virtual void FillRectangle(PRectangle rc, ColourAllocated back);
    virtual void FillRectangle(PRectangle rc, Surface &surfacePattern);
    virtual void RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back);
    virtual void Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back);
    virtual void Copy(PRectangle rc, Point from, Surface &surfaceSource);

    virtual void DrawTextNoClip(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back);
    virtual void DrawTextClipped(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back);
    virtual void DrawTextTransparent(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore);
    virtual void MeasureWidths(Font &font_, const char *s, int len, int *positions);
    virtual int WidthText(Font &font_, const char *s, int len);
    virtual int WidthChar(Font &font_, char ch);
    virtual int Ascent(Font &font_);
    virtual int Descent(Font &font_);
    virtual int InternalLeading(Font &font_);
    virtual int ExternalLeading(Font &font_);
    virtual int Height(Font &font_);
    virtual int AverageCharWidth(Font &font_);

    virtual int SetPalette(Palette *pal, bool inBackGround);
    virtual void SetClip(PRectangle rc);
    virtual void FlushCachedState();

    virtual void SetUnicodeMode(bool unicodeMode_);
    virtual void SetDBCSMode(int codePage);

    void BrushColour(ColourAllocated back);
    void SetFont(Font &font_);
};



SurfaceImpl::SurfaceImpl() :
    hdc(0), hdcOwned(0), bitmap(0),
    x(0), y(0), unicodeMode(0)
{}

SurfaceImpl::~SurfaceImpl() {
    Release();
}

void SurfaceImpl::Init(WindowID wid) {
#if 0
    Release();
    hdc = new wxMemoryDC();
    hdcOwned = true;
#else
    // On Mac and GTK the DC is not really valid until it has a bitmap
    // selected into it.  So instead of just creating the DC with no bitmap,
    // go ahead and give it one.
    InitPixMap(1,1,NULL,wid);
#endif
}

void SurfaceImpl::Init(SurfaceID hdc_, WindowID) {
    Release();
    hdc = (wxDC*)hdc_;
}

void SurfaceImpl::InitPixMap(int width, int height, Surface *WXUNUSED(surface_), WindowID) {
    Release();
    hdc = new wxMemoryDC();
    hdcOwned = true;
    if (width < 1) width = 1;
    if (height < 1) height = 1;
    bitmap = new wxBitmap(width, height);
    ((wxMemoryDC*)hdc)->SelectObject(*bitmap);
}


void SurfaceImpl::Release() {
    if (bitmap) {
        ((wxMemoryDC*)hdc)->SelectObject(wxNullBitmap);
        delete bitmap;
        bitmap = 0;
    }
    if (hdcOwned) {
        delete hdc;
        hdc = 0;
        hdcOwned = false;
    }
}


bool SurfaceImpl::Initialised() {
    return hdc != 0;
}


void SurfaceImpl::PenColour(ColourAllocated fore) {
    hdc->SetPen(wxPen(wxColourFromCA(fore), 1, wxSOLID));
}

void SurfaceImpl::BrushColour(ColourAllocated back) {
    hdc->SetBrush(wxBrush(wxColourFromCA(back), wxSOLID));
}

void SurfaceImpl::SetFont(Font &font_) {
  if (font_.GetID()) {
      hdc->SetFont(*((wxFont*)font_.GetID()));
    }
}

int SurfaceImpl::LogPixelsY() {
    return hdc->GetPPI().y;
}

int SurfaceImpl::DeviceHeightFont(int points) {
    return points;
}

void SurfaceImpl::MoveTo(int x_, int y_) {
    x = x_;
    y = y_;
}

void SurfaceImpl::LineTo(int x_, int y_) {
    hdc->DrawLine(x,y, x_,y_);
    x = x_;
    y = y_;
}

void SurfaceImpl::Polygon(Point *pts, int npts, ColourAllocated fore, ColourAllocated back) {
    PenColour(fore);
    BrushColour(back);
    hdc->DrawPolygon(npts, (wxPoint*)pts);
}

void SurfaceImpl::RectangleDraw(PRectangle rc, ColourAllocated fore, ColourAllocated back) {
    PenColour(fore);
    BrushColour(back);
    hdc->DrawRectangle(wxRectFromPRectangle(rc));
}

void SurfaceImpl::FillRectangle(PRectangle rc, ColourAllocated back) {
    BrushColour(back);
    hdc->SetPen(*wxTRANSPARENT_PEN);
    hdc->DrawRectangle(wxRectFromPRectangle(rc));
}

void SurfaceImpl::FillRectangle(PRectangle rc, Surface &surfacePattern) {
    wxBrush br;
    if (((SurfaceImpl&)surfacePattern).bitmap)
        br = wxBrush(*((SurfaceImpl&)surfacePattern).bitmap);
    else    // Something is wrong so display in red
        br = wxBrush(*wxRED, wxSOLID);
    hdc->SetPen(*wxTRANSPARENT_PEN);
    hdc->SetBrush(br);
    hdc->DrawRectangle(wxRectFromPRectangle(rc));
}

void SurfaceImpl::RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back) {
    PenColour(fore);
    BrushColour(back);
    hdc->DrawRoundedRectangle(wxRectFromPRectangle(rc), 4);
}

void SurfaceImpl::Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back) {
    PenColour(fore);
    BrushColour(back);
    hdc->DrawEllipse(wxRectFromPRectangle(rc));
}

void SurfaceImpl::Copy(PRectangle rc, Point from, Surface &surfaceSource) {
    wxRect r = wxRectFromPRectangle(rc);
    hdc->Blit(r.x, r.y, r.width, r.height,
              ((SurfaceImpl&)surfaceSource).hdc,
              from.x, from.y, wxCOPY);
}

void SurfaceImpl::DrawTextNoClip(PRectangle rc, Font &font, int ybase,
                                 const char *s, int len,
                                 ColourAllocated fore, ColourAllocated back) {
    SetFont(font);
    hdc->SetTextForeground(wxColourFromCA(fore));
    hdc->SetTextBackground(wxColourFromCA(back));
    FillRectangle(rc, back);

    // ybase is where the baseline should be, but wxWin uses the upper left
    // corner, so I need to calculate the real position for the text...
    hdc->DrawText(sci2wx(s, len), rc.left, ybase - font.ascent);
}

void SurfaceImpl::DrawTextClipped(PRectangle rc, Font &font, int ybase,
                                  const char *s, int len,
                                  ColourAllocated fore, ColourAllocated back) {
    SetFont(font);
    hdc->SetTextForeground(wxColourFromCA(fore));
    hdc->SetTextBackground(wxColourFromCA(back));
    FillRectangle(rc, back);
    hdc->SetClippingRegion(wxRectFromPRectangle(rc));

    // see comments above
    hdc->DrawText(sci2wx(s, len), rc.left, ybase - font.ascent);
    hdc->DestroyClippingRegion();
}


void SurfaceImpl::DrawTextTransparent(PRectangle rc, Font &font, int ybase,
                                      const char *s, int len,
                                      ColourAllocated fore) {

    SetFont(font);
    hdc->SetTextForeground(wxColourFromCA(fore));
    hdc->SetBackgroundMode(wxTRANSPARENT);

    // ybase is where the baseline should be, but wxWin uses the upper left
    // corner, so I need to calculate the real position for the text...
    hdc->DrawText(sci2wx(s, len), rc.left, ybase - font.ascent);

    hdc->SetBackgroundMode(wxSOLID);
}


void SurfaceImpl::MeasureWidths(Font &font, const char *s, int len, int *positions) {

    wxString str = sci2wx(s, len);
    SetFont(font);

#if !wxCHECK_VERSION(2, 5, 0)
#ifndef __WXMAC__
    // Calculate the position of each character based on the widths of
    // the previous characters
    int* tpos = new int[len+1];
    int totalWidth = 0;
    size_t i;
    for (i=0; i<str.Length(); i++) {
        int w, h;
        hdc->GetTextExtent(str[i], &w, &h);
        totalWidth += w;
        tpos[i] = totalWidth;
    }
#else
    // Instead of a running total, remeasure from the begining of the
    // text for each character's position.  This is because with AA fonts
    // on OS X widths can be fractions of pixels wide when more than one
    // are drawn together, so the sum of all character widths is not necessarily
    // (and probably not) the same as the whole string width.
    int* tpos = new int[len+1];
    size_t i;
    for (i=0; i<str.Length(); i++) {
        int w, h;
        hdc->GetTextExtent(str.Left(i+1), &w, &h);
        tpos[i] = w;
    }
#endif
#else
    wxArrayInt tpos;
    hdc->GetPartialTextExtents(str, tpos);
#endif


#if wxUSE_UNICODE
    // Map the widths for UCS-2 characters back to the UTF-8 input string
    // NOTE:  I don't think this is right for when sizeof(wxChar) > 2, ie wxGTK2
    // so figure it out and fix it!
    int j = 0;
    size_t ui = 0;
    while ((int)j < len) {
        unsigned char uch = (unsigned char)s[j];
        positions[j++] = tpos[ui];
        if (uch >= 0x80) {
            if (uch < (0x80 + 0x40 + 0x20)) {
                positions[j++] = tpos[ui];
            } else {
                positions[j++] = tpos[ui];
                positions[j++] = tpos[ui];
            }
        }
        ui++;
    }
#else

    // If not unicode then just use the widths we have
#if !wxCHECK_VERSION(2, 5, 0)
    memcpy(positions, tpos, len * sizeof(*tpos));
#else
#if wxUSE_STL
    std::copy(tpos.begin(), tpos.end(), positions);
#else
    memcpy(positions, tpos.begin(), len * sizeof(int));
#endif
#endif
#endif

#if !wxCHECK_VERSION(2, 5, 0)
    delete [] tpos;
#endif
}


int SurfaceImpl::WidthText(Font &font, const char *s, int len) {
    SetFont(font);
    int w;
    int h;

    hdc->GetTextExtent(sci2wx(s, len), &w, &h);
    return w;
}


int SurfaceImpl::WidthChar(Font &font, char ch) {
    SetFont(font);
    int w;
    int h;
    char s[2] = { ch, 0 };

    hdc->GetTextExtent(sci2wx(s, 1), &w, &h);
    return w;
}

#define EXTENT_TEST wxT(" `~!@#$%^&*()-_=+\\|[]{};:\"\'<,>.?/1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")