/////////////////////////////////////////////////////////////////////////////
-// 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
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation
-#endif
-
#include "wx/wxprec.h"
-#include "wx/defs.h"
-#if wxUSE_HTML && wxUSE_STREAMS
-#ifdef __BORDLANDC__
-#pragma hdrstop
+#ifdef __BORLANDC__
+ #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"
//-----------------------------------------------------------------------------
-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);
+ virtual ~wxHtmlTableCell();
+
+ virtual void RemoveExtraSpacing(bool top, bool bottom);
+
+ 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)
};
: 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;
}
+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)
{
{
m_ColsInfo[j].width = 0;
m_ColsInfo[j].units = wxHTML_UNITS_PERCENT;
+ m_ColsInfo[j].minWidth = m_ColsInfo[j].maxWidth = -1;
}
m_NumCols = cols;
{
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;
{
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;
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 :
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
{
*/
- /* 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. setup floating-width columns:
+ // 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))
- 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: */
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;
+ }
}
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;
}
{
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;
}
- else if (m_Table && !tag.IsEnding())
+ else if (m_Table)
{
// new row in table
if (tag.GetName() == wxT("TR"))
// 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)
projects / wxWidgets.git / blobdiff