C++ CPDF_Font::CharCodeFromUnicode方法代码示例

void CTextPage::ProcessObject(CPDF_PageObject* pObject)
{
    if (pObject->m_Type != PDFPAGE_TEXT) {
        return;
    }
    CPDF_TextObject* pText = (CPDF_TextObject*)pObject;
    CPDF_Font* pFont = pText->m_TextState.GetFont();
    int count = pText->CountItems();
    FX_FLOAT* pPosArray = FX_Alloc(FX_FLOAT, count * 2);
    if (pPosArray) {
        pText->CalcCharPos(pPosArray);
    }
    FX_FLOAT fontsize_h = pText->m_TextState.GetFontSizeH();
    FX_FLOAT fontsize_v = pText->m_TextState.GetFontSizeV();
    FX_DWORD space_charcode = pFont->CharCodeFromUnicode(' ');
    FX_FLOAT spacew = 0;
    if (space_charcode != -1) {
        spacew = fontsize_h * pFont->GetCharWidthF(space_charcode) / 1000;
    }
    if (spacew == 0) {
        spacew = fontsize_h / 4;
    }
    if (pText->m_TextState.GetBaselineAngle() != 0) {
        int cc = 0;
        CFX_AffineMatrix matrix;
        pText->GetTextMatrix(&matrix);
        for (int i = 0; i < pText->m_nChars; i ++) {
            FX_DWORD charcode = pText->m_nChars == 1 ? (FX_DWORD)(FX_UINTPTR)pText->m_pCharCodes : pText->m_pCharCodes[i];
            if (charcode == (FX_DWORD) - 1) {
                continue;
            }
            FX_RECT char_box;
            pFont->GetCharBBox(charcode, char_box);
            FX_FLOAT char_left = pPosArray ? pPosArray[cc * 2] : char_box.left * pText->m_TextState.GetFontSize() / 1000;
            FX_FLOAT char_right = pPosArray ? pPosArray[cc * 2 + 1] : char_box.right * pText->m_TextState.GetFontSize() / 1000;
            FX_FLOAT char_top = char_box.top * pText->m_TextState.GetFontSize() / 1000;
            FX_FLOAT char_bottom = char_box.bottom * pText->m_TextState.GetFontSize() / 1000;
            cc ++;
            FX_FLOAT char_origx, char_origy;
            matrix.Transform(char_left, 0, char_origx, char_origy);
            matrix.TransformRect(char_left, char_right, char_top, char_bottom);
            CFX_ByteString str;
            pFont->AppendChar(str, charcode);
            InsertTextBox(NULL, char_origy, char_left, char_right, char_top,
                          char_bottom, spacew, fontsize_v, str, pFont);
        }
        if (pPosArray) {
            FX_Free(pPosArray);
        }
        return;
    }
    FX_FLOAT ratio_h = fontsize_h / pText->m_TextState.GetFontSize();
    for (int ii = 0; ii < count * 2; ii ++) {
        pPosArray[ii] *= ratio_h;
    }
    FX_FLOAT baseline = pText->m_PosY;
    CTextBaseLine* pBaseLine = NULL;
    FX_FLOAT topy = pText->m_Top;
    FX_FLOAT bottomy = pText->m_Bottom;
    FX_FLOAT leftx = pText->m_Left;
    int cc = 0;
    CFX_ByteString segment;
    int space_count = 0;
    FX_FLOAT last_left = 0, last_right = 0, segment_left = 0, segment_right = 0;
    for (int i = 0; i < pText->m_nChars; i ++) {
        FX_DWORD charcode = pText->m_nChars == 1 ? (FX_DWORD)(FX_UINTPTR)pText->m_pCharCodes : pText->m_pCharCodes[i];
        if (charcode == (FX_DWORD) - 1) {
            continue;
        }
        FX_FLOAT char_left = pPosArray[cc * 2];
        FX_FLOAT char_right = pPosArray[cc * 2 + 1];
        cc ++;
        if (char_left < last_left || (char_left - last_right) > spacew / 2) {
            pBaseLine = InsertTextBox(pBaseLine, baseline, leftx + segment_left, leftx + segment_right,
                                      topy, bottomy, spacew, fontsize_v, segment, pFont);
            segment_left = char_left;
            segment = "";
        }
        if (space_count > 1) {
            pBaseLine = InsertTextBox(pBaseLine, baseline, leftx + segment_left, leftx + segment_right,
                                      topy, bottomy, spacew, fontsize_v, segment, pFont);
            segment = "";
        } else if (space_count == 1) {
            pFont->AppendChar(segment, ' ');
        }
        if (segment.GetLength() == 0) {
            segment_left = char_left;
        }
        segment_right = char_right;
        pFont->AppendChar(segment, charcode);
        space_count = 0;
        last_left = char_left;
        last_right = char_right;
    }
    if (segment.GetLength())
        pBaseLine = InsertTextBox(pBaseLine, baseline, leftx + segment_left, leftx + segment_right,
                                  topy, bottomy, spacew, fontsize_v, segment, pFont);
    FX_Free(pPosArray);
}

FX_BOOL CPDF_TextStream::ProcessObject(const CPDF_TextObject* pObj, FX_BOOL bFirstLine)
{
    CPDF_Font* pFont = pObj->GetFont();
    CFX_AffineMatrix matrix;
    pObj->GetTextMatrix(&matrix);
    int item_index = 0;
    if (m_pLastObj) {
        int result = FPDFText_ProcessInterObj(m_pLastObj, pObj);
        if (result == 2) {
            int len = m_Buffer.GetLength();
            if (len && m_bUseLF && m_Buffer.GetBuffer()[len - 1] == L'-') {
                m_Buffer.Delete(len - 1, 1);
                if (m_pObjArray) {
                    m_pObjArray->RemoveAt((len - 1) * 2, 2);
                }
            } else {
                if (bFirstLine) {
                    return TRUE;
                }
                if (m_bUseLF) {
                    m_Buffer.AppendChar(L'\r');
                    m_Buffer.AppendChar(L'\n');
                    if (m_pObjArray) {
                        for (int i = 0; i < 4; i ++) {
                            m_pObjArray->Add(NULL);
                        }
                    }
                } else {
                    m_Buffer.AppendChar(' ');
                    if (m_pObjArray) {
                        m_pObjArray->Add(NULL);
                        m_pObjArray->Add(NULL);
                    }
                }
            }
        } else if (result == 1) {
            m_Buffer.AppendChar(L' ');
            if (m_pObjArray) {
                m_pObjArray->Add(NULL);
                m_pObjArray->Add(NULL);
            }
        } else if (result == -1) {
            m_pLastObj = pObj;
            return FALSE;
        } else if (result == 3) {
            item_index = 1;
        }
    }
    m_pLastObj = pObj;
    int nItems = pObj->CountItems();
    FX_FLOAT Ignorekerning = 0;
    for(int i = 1; i < nItems - 1; i += 2) {
        CPDF_TextObjectItem item;
        pObj->GetItemInfo(i, &item);
        if (item.m_CharCode == (FX_DWORD) - 1) {
            if(i == 1) {
                Ignorekerning = item.m_OriginX;
            } else if(Ignorekerning > item.m_OriginX) {
                Ignorekerning = item.m_OriginX;
            }
        } else {
            Ignorekerning = 0;
            break;
        }
    }
    FX_FLOAT spacing = 0;
    for (; item_index < nItems; item_index ++) {
        CPDF_TextObjectItem item;
        pObj->GetItemInfo(item_index, &item);
        if (item.m_CharCode == (FX_DWORD) - 1) {
            CFX_WideString wstr = m_Buffer.GetWideString();
            if (wstr.IsEmpty() || wstr.GetAt(wstr.GetLength() - 1) == L' ') {
                continue;
            }
            FX_FLOAT fontsize_h = pObj->m_TextState.GetFontSizeH();
            spacing = -fontsize_h * (item.m_OriginX - Ignorekerning) / 1000;
            continue;
        }
        FX_FLOAT charSpace = pObj->m_TextState.GetObject()->m_CharSpace;
        if(nItems > 3 && !spacing) {
            charSpace = 0;
        }
        if((spacing || charSpace) && item_index > 0) {
            int last_width = 0;
            FX_FLOAT fontsize_h = pObj->m_TextState.GetFontSizeH();
            FX_DWORD space_charcode = pFont->CharCodeFromUnicode(' ');
            FX_FLOAT threshold = 0;
            if (space_charcode != -1) {
                threshold = fontsize_h * pFont->GetCharWidthF(space_charcode) / 1000 ;
            }
            if(threshold > fontsize_h / 3) {
                threshold = 0;
            } else {
                threshold /= 2;
            }
            if (threshold == 0) {
                threshold = fontsize_h;
                int this_width = FXSYS_abs(GetCharWidth(item.m_CharCode, pFont));
                threshold = this_width > last_width ? (FX_FLOAT)this_width : (FX_FLOAT)last_width;
                int nDivide = 6;
//.........这里部分代码省略.........