X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/14f355c2b5c71fc7c3d680aea366582d2ac60f7b..b9d880d6382e24156cdce4ae0390c843cc6208d9:/src/html/m_tables.cpp diff --git a/src/html/m_tables.cpp b/src/html/m_tables.cpp index d1abf09252..7f965d7e0c 100644 --- a/src/html/m_tables.cpp +++ b/src/html/m_tables.cpp @@ -1,35 +1,23 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: m_tables.cpp +// Name: src/html/m_tables.cpp // Purpose: wxHtml module for tables // Author: Vaclav Slavik // RCS-ID: $Id$ // Copyright: (c) 1999 Vaclav Slavik -// Licence: wxWindows Licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma implementation -#endif - #include "wx/wxprec.h" -#include "wx/defs.h" -#if wxUSE_HTML && wxUSE_STREAMS #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif +#if wxUSE_HTML && wxUSE_STREAMS + #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" @@ -73,6 +61,7 @@ struct cellStruct int colspan, rowspan; int minheight, valign; cellState flag; + bool nowrap; }; @@ -109,7 +98,10 @@ private: public: wxHtmlTableCell(wxHtmlContainerCell *parent, const wxHtmlTag& tag, double pixel_scale = 1.0); - ~wxHtmlTableCell(); + virtual ~wxHtmlTableCell(); + + virtual void RemoveExtraSpacing(bool top, bool bottom); + virtual void Layout(int w); void AddRow(const wxHtmlTag& tag); @@ -123,7 +115,7 @@ private: void ReallocRows(int rows); // Computes minimal and maximal widths of columns. Needs to be called - // only once, before first Layout(). + // only once, before first Layout(). void ComputeMinMaxWidths(); DECLARE_NO_COPY_CLASS(wxHtmlTableCell) @@ -135,7 +127,7 @@ 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 +166,15 @@ wxHtmlTableCell::~wxHtmlTableCell() } +void wxHtmlTableCell::RemoveExtraSpacing(bool WXUNUSED(top), + bool WXUNUSED(bottom)) +{ + // Don't remove any spacing in the table -- it's always desirable, + // because it's part of table's definition. + // (If wxHtmlContainerCell::RemoveExtraSpacing() was applied to tables, + // then upper left cell of a table would be positioned above other cells + // if the table was the first element on the page.) +} void wxHtmlTableCell::ReallocCols(int cols) { @@ -274,7 +275,7 @@ void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag) { wxString wd = tag.GetParam(wxT("WIDTH")); - if (wd[wd.Length()-1] == wxT('%')) + if (wd[wd.length()-1] == wxT('%')) { wxSscanf(wd.c_str(), wxT("%i%%"), &m_ColsInfo[c].width); m_ColsInfo[c].units = wxHTML_UNITS_PERCENT; @@ -295,14 +296,14 @@ void wxHtmlTableCell::AddCell(wxHtmlContainerCell *cell, const wxHtmlTag& tag) tag.GetParamAsInt(wxT("ROWSPAN"), &m_CellInfo[r][c].rowspan); // 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 + // "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) + if (m_CellInfo[r][c].colspan < 1) m_CellInfo[r][c].colspan = 1; - if (m_CellInfo[r][c].rowspan < 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)) @@ -346,13 +347,21 @@ 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 != -1) return; - + 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++) @@ -361,26 +370,46 @@ void wxHtmlTableCell::ComputeMinMaxWidths() if (cell.flag == cellUsed) { cell.cont->Layout(2*m_Padding + 1); - int width = cell.cont->GetWidth(); + 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; - for (int j = 0; j < cell.colspan; j++) + 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; } - - // FIXME -- compute maxWidth as well. Not needed yet, so there's no - // point in computing it. -} + 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); /* @@ -391,8 +420,18 @@ 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 { @@ -407,7 +446,10 @@ 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; @@ -416,34 +458,108 @@ void wxHtmlTableCell::Layout(int w) for (i = 0; i < m_NumCols; i++) if (m_ColsInfo[i].units == wxHTML_UNITS_PIXELS) { - m_ColsInfo[i].pixwidth = wxMax(m_ColsInfo[i].width, + m_ColsInfo[i].pixwidth = wxMax(m_ColsInfo[i].width, m_ColsInfo[i].minWidth); wpix -= m_ColsInfo[i].pixwidth; } - // 1b. setup floating-width columns: - int wtemp = 0; + // 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; + } + + + // 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)) { - m_ColsInfo[i].pixwidth = wxMax(m_ColsInfo[i].width * wpix / 100, - m_ColsInfo[i].minWidth); - wtemp += m_ColsInfo[i].pixwidth; + 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; + 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): - // FIXME: 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) { - // FIXME: this is not optimal, because if we allocate more than - // wpix/j pixels to one column, we should try to allocate - // smaller place to other columns - m_ColsInfo[i].pixwidth = wxMax(wpix/j, m_ColsInfo[i].minWidth); + // 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; } } @@ -514,7 +630,7 @@ void wxHtmlTableCell::Layout(int w) /* 4. adjust table's width if it was too small: */ if (m_NumCols > 0) { - int twidth = m_ColsInfo[m_NumCols-1].leftpos + + int twidth = m_ColsInfo[m_NumCols-1].leftpos + m_ColsInfo[m_NumCols-1].pixwidth + m_Spacing; if (twidth > m_Width) m_Width = twidth; @@ -556,8 +672,30 @@ TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH") oldcont = c = m_WParser->OpenContainer(); - c->SetWidthFloat(tag, m_WParser->GetPixelScale()); - m_Table = new wxHtmlTableCell(c, tag, m_WParser->GetPixelScale()); + 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"))) @@ -568,9 +706,9 @@ TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH") m_WParser->SetAlign(oldAlign); m_WParser->SetContainer(oldcont); m_WParser->CloseContainer(); - + m_Table = oldt; - return TRUE; + return true; } @@ -614,7 +752,7 @@ TAG_HANDLER_BEGIN(TABLE, "TABLE,TR,TD,TH") m_WParser->OpenContainer(); } } - return FALSE; + return false; } TAG_HANDLER_END(TABLE)