X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/211dfeddfca5c5992db510bdaa72226bf2013c05..cc9a39576ab6edb139c9bb77d01f4118853e04d2:/src/html/m_tables.cpp?ds=sidebyside diff --git a/src/html/m_tables.cpp b/src/html/m_tables.cpp index 7f2f90ff8b..a1eec08b1e 100644 --- a/src/html/m_tables.cpp +++ b/src/html/m_tables.cpp @@ -4,10 +4,10 @@ // Author: Vaclav Slavik // RCS-ID: $Id$ // Copyright: (c) 1999 Vaclav Slavik -// Licence: wxWindows Licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation #endif @@ -15,21 +15,13 @@ #include "wx/defs.h" #if wxUSE_HTML && wxUSE_STREAMS -#ifdef __BORDLANDC__ +#ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WXPRECOMP #endif - -/* -REMARKS: - 1. This version of m_tables doesn't support auto-layout algorithm. - This means that all columns are of same width unless explicitly specified. -*/ - - #include "wx/html/forcelnk.h" #include "wx/html/m_templ.h" @@ -47,69 +39,87 @@ FORCE_LINK_ME(m_tables) //----------------------------------------------------------------------------- -typedef struct { - int width, units; - // universal - int leftpos, pixwidth, maxrealwidth; - // temporary (depends on width of table) - } colStruct; +struct colStruct +{ + int width, units; + // width of the column either in pixels or percents + // ('width' is the number, 'units' determines its meaning) + int minWidth, maxWidth; + // minimal/maximal column width. This is needed by HTML 4.0 + // layouting algorithm and can be determined by trying to + // layout table cells with width=1 and width=infinity + int leftpos, pixwidth, maxrealwidth; + // temporary (depends on actual width of table) +}; -typedef enum { - cellSpan, - cellUsed, - cellFree - } cellState; +enum cellState +{ + cellSpan, + cellUsed, + cellFree +}; -typedef struct { - wxHtmlContainerCell *cont; - int colspan, rowspan; - int minheight, valign; - cellState flag; - } cellStruct; +struct cellStruct +{ + wxHtmlContainerCell *cont; + int colspan, rowspan; + int minheight, valign; + cellState flag; + bool nowrap; +}; class wxHtmlTableCell : public wxHtmlContainerCell { - protected: - /* These are real attributes: */ - bool m_HasBorders; - // should we draw borders or not? - int m_NumCols, m_NumRows; - // number of columns; rows - colStruct *m_ColsInfo; - // array of column information - cellStruct **m_CellInfo; - // 2D array of all cells in the table : m_CellInfo[row][column] - int m_Spacing; - // spaces between cells - int m_Padding; - // cells internal indentation - - private: - /* ...and these are valid only during parsing of table: */ - int m_ActualCol, m_ActualRow; - // number of actual column (ranging from 0..m_NumCols) - - // default values (for table and row): - wxColour m_tBkg, m_rBkg; - wxString m_tValign, m_rValign; - - double m_PixelScale; - - - public: - wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale = 1.0); - ~wxHtmlTableCell(); - virtual void Layout(int w); - - void AddRow(const wxHtmlTag& tag); - void AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag); - private: - void ReallocCols(int cols); - void ReallocRows(int rows); - // reallocates memory to given number of cols/rows - // and changes m_NumCols/m_NumRows value to reflect this change - // NOTE! You CAN'T change m_NumCols/m_NumRows before calling this!! +protected: + /* These are real attributes: */ + + // should we draw borders or not? + bool m_HasBorders; + // number of columns; rows + int m_NumCols, m_NumRows; + // array of column information + colStruct *m_ColsInfo; + // 2D array of all cells in the table : m_CellInfo[row][column] + cellStruct **m_CellInfo; + // spaces between cells + int m_Spacing; + // cells internal indentation + int m_Padding; + +private: + /* ...and these are valid only when parsing the table: */ + + // number of actual column (ranging from 0..m_NumCols) + int m_ActualCol, m_ActualRow; + + // default values (for table and row): + wxColour m_tBkg, m_rBkg; + wxString m_tValign, m_rValign; + + double m_PixelScale; + + +public: + wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale = 1.0); + ~wxHtmlTableCell(); + virtual void Layout(int w); + + void AddRow(const wxHtmlTag& tag); + void AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag); + +private: + // Reallocates memory to given number of cols/rows + // and changes m_NumCols/m_NumRows value to reflect this change + // NOTE! You CAN'T change m_NumCols/m_NumRows before calling this!! + void ReallocCols(int cols); + void ReallocRows(int rows); + + // Computes minimal and maximal widths of columns. Needs to be called + // only once, before first Layout(). + void ComputeMinMaxWidths(); + + DECLARE_NO_COPY_CLASS(wxHtmlTableCell) }; @@ -118,7 +128,7 @@ wxHtmlTableCell::wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& t : wxHtmlContainerCell(parent) { m_PixelScale = pixel_scale; - m_HasBorders = + m_HasBorders = (tag.HasParam(wxT("BORDER")) && tag.GetParam(wxT("BORDER")) != wxT("0")); m_ColsInfo = NULL; m_NumCols = m_NumRows = 0; @@ -174,6 +184,7 @@ void wxHtmlTableCell::ReallocCols(int cols) { m_ColsInfo[j].width = 0; m_ColsInfo[j].units = wxHTML_UNITS_PERCENT; + m_ColsInfo[j].minWidth = m_ColsInfo[j].maxWidth = -1; } m_NumCols = cols; @@ -275,7 +286,19 @@ void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag) { tag.GetParamAsInt(wxT("COLSPAN"), &m_CellInfo[r][c].colspan); tag.GetParamAsInt(wxT("ROWSPAN"), &m_CellInfo[r][c].rowspan); - if ((m_CellInfo[r][c].colspan != 1) || (m_CellInfo[r][c].rowspan != 1)) + + // VS: the standard says this about col/rowspan: + // "This attribute specifies the number of rows spanned by the + // current cell. The default value of this attribute is one ("1"). + // The value zero ("0") means that the cell spans all rows from the + // current row to the last row of the table." All mainstream + // browsers act as if 0==1, though, and so does wxHTML. + if (m_CellInfo[r][c].colspan < 1) + m_CellInfo[r][c].colspan = 1; + if (m_CellInfo[r][c].rowspan < 1) + m_CellInfo[r][c].rowspan = 1; + + if ((m_CellInfo[r][c].colspan > 1) || (m_CellInfo[r][c].rowspan > 1)) { int i, j; @@ -316,15 +339,71 @@ void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag) else m_CellInfo[r][c].valign = wxHTML_ALIGN_CENTER; } + // nowrap + if (tag.HasParam(wxT("NOWRAP"))) + m_CellInfo[r][c].nowrap = true; + else + m_CellInfo[r][c].nowrap = false; + cell->SetIndent(m_Padding, wxHTML_INDENT_ALL, wxHTML_UNITS_PIXELS); } +void wxHtmlTableCell::ComputeMinMaxWidths() +{ + if (m_NumCols == 0 || m_ColsInfo[0].minWidth != wxDefaultCoord) return; + m_MaxTotalWidth = 0; + int percentage = 0; + for (int c = 0; c < m_NumCols; c++) + { + for (int r = 0; r < m_NumRows; r++) + { + cellStruct& cell = m_CellInfo[r][c]; + if (cell.flag == cellUsed) + { + cell.cont->Layout(2*m_Padding + 1); + int maxWidth = cell.cont->GetMaxTotalWidth(); + int width = cell.nowrap?maxWidth:cell.cont->GetWidth(); + width -= (cell.colspan-1) * m_Spacing; + maxWidth -= (cell.colspan-1) * m_Spacing; + // HTML 4.0 says it is acceptable to distribute min/max + width /= cell.colspan; + maxWidth /= cell.colspan; + for (int j = 0; j < cell.colspan; j++) { + if (width > m_ColsInfo[c+j].minWidth) + m_ColsInfo[c+j].minWidth = width; + if (maxWidth > m_ColsInfo[c+j].maxWidth) + m_ColsInfo[c+j].maxWidth = maxWidth; + } + } + } + // Calculate maximum table width, required for nested tables + if (m_ColsInfo[c].units == wxHTML_UNITS_PIXELS) + m_MaxTotalWidth += wxMax(m_ColsInfo[c].width, m_ColsInfo[c].minWidth); + else if ((m_ColsInfo[c].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[c].width != 0)) + percentage += m_ColsInfo[c].width; + else + m_MaxTotalWidth += m_ColsInfo[c].maxWidth; + } + if (percentage >= 100) + { + // Table would have infinite length + // Make it ridiculous large + m_MaxTotalWidth = 0xFFFFFF; + } + else + m_MaxTotalWidth = m_MaxTotalWidth * 100 / (100 - percentage); + m_MaxTotalWidth += (m_NumCols + 1) * m_Spacing; +} void wxHtmlTableCell::Layout(int w) { + ComputeMinMaxWidths(); + + wxHtmlCell::Layout(w); + /* WIDTH ADJUSTING : @@ -333,8 +412,18 @@ void wxHtmlTableCell::Layout(int w) if (m_WidthFloatUnits == wxHTML_UNITS_PERCENT) { - if (m_WidthFloat < 0) m_Width = (100 + m_WidthFloat) * w / 100; - else m_Width = m_WidthFloat * w / 100; + if (m_WidthFloat < 0) + { + if (m_WidthFloat < -100) + m_WidthFloat = -100; + m_Width = (100 + m_WidthFloat) * w / 100; + } + else + { + if (m_WidthFloat > 100) + m_WidthFloat = 100; + m_Width = m_WidthFloat * w / 100; + } } else { @@ -349,31 +438,121 @@ void wxHtmlTableCell::Layout(int w) */ - /* 1. setup columns widths: */ + /* 1. setup columns widths: + + The algorithm tries to keep the table size less than w if possible. + */ { int wpix = m_Width - (m_NumCols + 1) * m_Spacing; int i, j; - int wtemp = 0; // 1a. setup fixed-width columns: for (i = 0; i < m_NumCols; i++) if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS) - wpix -= (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width); + { + m_ColsInfo[i].pixwidth = wxMax(m_ColsInfo[i].width, + m_ColsInfo[i].minWidth); + wpix -= m_ColsInfo[i].pixwidth; + } + + // 1b. Calculate maximum possible width if line wrapping would be disabled + // Recalculate total width if m_WidthFloat is zero to keep tables as small + // as possible. + int maxWidth = 0; + for (i = 0; i < m_NumCols; i++) + if (m_ColsInfo[i].width == 0) + { + maxWidth += m_ColsInfo[i].maxWidth; + } + + if (!m_WidthFloat) + { + // Recalculate table width since no table width was initially given + int newWidth = m_Width - wpix + maxWidth; + + // Make sure that floating-width columns will have the right size. + // Calculate sum of all floating-width columns + int percentage = 0; + for (i = 0; i < m_NumCols; i++) + if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0)) + percentage += m_ColsInfo[i].width; + + if (percentage >= 100) + newWidth = w; + else + newWidth = newWidth * 100 / (100 - percentage); + + newWidth = wxMin(newWidth, w - (m_NumCols + 1) * m_Spacing); + wpix -= m_Width - newWidth; + m_Width = newWidth; + } + - // 1b. setup floating-width columns: + // 1c. setup floating-width columns: + int wtemp = wpix; for (i = 0; i < m_NumCols; i++) if ((m_ColsInfo[i].units == wxHTML_UNITS_PERCENT) && (m_ColsInfo[i].width != 0)) - wtemp += (m_ColsInfo[i].pixwidth = m_ColsInfo[i].width * wpix / 100); - wpix -= wtemp; + { + m_ColsInfo[i].pixwidth = wxMin(m_ColsInfo[i].width, 100) * wpix / 100; + + // Make sure to leave enough space for the other columns + int minRequired = 0; + for (j = 0; j < m_NumCols; j++) + { + if ((m_ColsInfo[j].units == wxHTML_UNITS_PERCENT && j > i) || + !m_ColsInfo[j].width) + minRequired += m_ColsInfo[j].minWidth; + } + m_ColsInfo[i].pixwidth = wxMax(wxMin(wtemp - minRequired, m_ColsInfo[i].pixwidth), m_ColsInfo[i].minWidth); + + wtemp -= m_ColsInfo[i].pixwidth; + } + wpix = wtemp; + + // 1d. setup default columns (no width specification supplied): + // The algorithm assigns calculates the maximum possible width if line + // wrapping would be disabled and assigns column width as a fraction + // based upon the maximum width of a column + // FIXME: I'm not sure if this algorithm is conform to HTML standard, + // though it seems to be much better than the old one - // 1c. setup defalut columns (no width specification supplied): - // NOTE! This algorithm doesn't conform to HTML standard : it assigns equal widths - // instead of optimal for (i = j = 0; i < m_NumCols; i++) if (m_ColsInfo[i].width == 0) j++; + if (wpix < 0) + wpix = 0; + + // Assign widths for (i = 0; i < m_NumCols; i++) if (m_ColsInfo[i].width == 0) - m_ColsInfo[i].pixwidth = wpix / j; + { + // Assign with, make sure not to drop below minWidth + if (maxWidth) + m_ColsInfo[i].pixwidth = (int)(wpix * (m_ColsInfo[i].maxWidth / (float)maxWidth) + 0.5); + else + m_ColsInfo[i].pixwidth = wpix / j; + + // Make sure to leave enough space for the other columns + int minRequired = 0; + int r; + for (r = i + 1; r < m_NumCols; r++) + { + if (!m_ColsInfo[r].width) + minRequired += m_ColsInfo[r].minWidth; + } + m_ColsInfo[i].pixwidth = wxMax(wxMin(wpix - minRequired, m_ColsInfo[i].pixwidth), m_ColsInfo[i].minWidth); + + if (maxWidth) + { + if (m_ColsInfo[i].pixwidth > (wpix * (m_ColsInfo[i].maxWidth / (float)maxWidth) + 0.5)) + { + int diff = (int)(m_ColsInfo[i].pixwidth - (wpix * m_ColsInfo[i].maxWidth / (float)maxWidth + 0.5)); + maxWidth += diff - m_ColsInfo[i].maxWidth; + } + else + maxWidth -= m_ColsInfo[i].maxWidth; + } + wpix -= m_ColsInfo[i].pixwidth; + } } /* 2. compute positions of columns: */ @@ -439,6 +618,15 @@ void wxHtmlTableCell::Layout(int w) m_Height = ypos[m_NumRows]; delete[] ypos; } + + /* 4. adjust table's width if it was too small: */ + if (m_NumCols > 0) + { + int twidth = m_ColsInfo[m_NumCols-1].leftpos + + m_ColsInfo[m_NumCols-1].pixwidth + m_Spacing; + if (twidth > m_Width) + m_Width = twidth; + } } @@ -456,13 +644,11 @@ TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH") TAG_HANDLER_VARS wxHtmlTableCell* m_Table; wxString m_tAlign, m_rAlign; - int m_OldAlign; TAG_HANDLER_CONSTR(TABLE) { m_Table = NULL; m_tAlign = m_rAlign = wxEmptyString; - m_OldAlign = wxHTML_ALIGN_LEFT; } @@ -475,24 +661,46 @@ TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH") { wxHtmlTableCell *oldt = m_Table; wxHtmlContainerCell *oldcont; - int m_OldAlign; oldcont = c = m_WParser->OpenContainer(); - c->SetWidthFloat(tag, m_WParser->GetPixelScale()); - m_Table = new wxHtmlTableCell(c, tag, m_WParser->GetPixelScale()); - m_OldAlign = m_WParser->GetAlign(); + m_Table = new wxHtmlTableCell(c, tag); + + // width: + { + if (tag.HasParam(wxT("WIDTH"))) + { + wxString wd = tag.GetParam(wxT("WIDTH")); + + if (wd[wd.Length()-1] == wxT('%')) + { + int width = 0; + wxSscanf(wd.c_str(), wxT("%i%%"), &width); + m_Table->SetWidthFloat(width, wxHTML_UNITS_PERCENT); + } + else + { + int width = 0; + wxSscanf(wd.c_str(), wxT("%i"), &width); + m_Table->SetWidthFloat((int)(m_WParser->GetPixelScale() * width), wxHTML_UNITS_PIXELS); + } + } + else + m_Table->SetWidthFloat(0, wxHTML_UNITS_PIXELS); + } + int oldAlign = m_WParser->GetAlign(); m_tAlign = wxEmptyString; if (tag.HasParam(wxT("ALIGN"))) m_tAlign = tag.GetParam(wxT("ALIGN")); ParseInner(tag); - m_WParser->SetAlign(m_OldAlign); + m_WParser->SetAlign(oldAlign); m_WParser->SetContainer(oldcont); m_WParser->CloseContainer(); + m_Table = oldt; - return TRUE; + return true; } @@ -510,33 +718,33 @@ TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH") // new cell else { - m_WParser->SetAlign(m_OldAlign); c = m_WParser->SetContainer(new wxHtmlContainerCell(m_Table)); m_Table->AddCell(c, tag); m_WParser->OpenContainer(); if (tag.GetName() == wxT("TH")) /*header style*/ - { m_WParser->SetAlign(wxHTML_ALIGN_CENTER); - } + else + m_WParser->SetAlign(wxHTML_ALIGN_LEFT); + + wxString als; + + als = m_rAlign; + if (tag.HasParam(wxT("ALIGN"))) + als = tag.GetParam(wxT("ALIGN")); + als.MakeUpper(); + if (als == wxT("RIGHT")) + m_WParser->SetAlign(wxHTML_ALIGN_RIGHT); + else if (als == wxT("LEFT")) + m_WParser->SetAlign(wxHTML_ALIGN_LEFT); + else if (als == wxT("CENTER")) + m_WParser->SetAlign(wxHTML_ALIGN_CENTER); - { - wxString als; - - als = m_rAlign; - if (tag.HasParam(wxT("ALIGN"))) - als = tag.GetParam(wxT("ALIGN")); - als.MakeUpper(); - if (als == wxT("RIGHT")) - m_WParser->SetAlign(wxHTML_ALIGN_RIGHT); - else if (als == wxT("CENTER")) - m_WParser->SetAlign(wxHTML_ALIGN_CENTER); - } m_WParser->OpenContainer(); } } - return FALSE; + return false; } TAG_HANDLER_END(TABLE)