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wxWidgets/src/html/htmlcell.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: src/html/htmlcell.cpp
// Purpose: wxHtmlCell - basic element of HTML output
// Author: Vaclav Slavik
// Copyright: (c) 1999 Vaclav Slavik
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_HTML && wxUSE_STREAMS
#ifndef WX_PRECOMP
#include "wx/dynarray.h"
#include "wx/brush.h"
#include "wx/colour.h"
#include "wx/dc.h"
#include "wx/settings.h"
#include "wx/module.h"
#include "wx/wxcrtvararg.h"
#endif
#include "wx/html/htmlcell.h"
#include "wx/html/htmlwin.h"
#include <stdlib.h>
//-----------------------------------------------------------------------------
// Helper classes
//-----------------------------------------------------------------------------
void wxHtmlSelection::Set(const wxPoint& fromPos, const wxHtmlCell *fromCell,
const wxPoint& toPos, const wxHtmlCell *toCell)
{
m_fromCell = fromCell;
m_toCell = toCell;
m_fromPos = fromPos;
m_toPos = toPos;
}
void wxHtmlSelection::Set(const wxHtmlCell *fromCell, const wxHtmlCell *toCell)
{
wxPoint p1 = fromCell ? fromCell->GetAbsPos() : wxDefaultPosition;
wxPoint p2 = toCell ? toCell->GetAbsPos() : wxDefaultPosition;
if ( toCell )
{
p2.x += toCell->GetWidth();
p2.y += toCell->GetHeight();
}
Set(p1, fromCell, p2, toCell);
}
wxColour
wxDefaultHtmlRenderingStyle::
GetSelectedTextColour(const wxColour& WXUNUSED(clr))
{
return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
}
wxColour
wxDefaultHtmlRenderingStyle::
GetSelectedTextBgColour(const wxColour& WXUNUSED(clr))
{
return wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
}
//-----------------------------------------------------------------------------
// wxHtmlCell
//-----------------------------------------------------------------------------
wxIMPLEMENT_ABSTRACT_CLASS(wxHtmlCell, wxObject);
wxHtmlCell::wxHtmlCell() : wxObject()
{
m_Next = NULL;
m_Parent = NULL;
m_Width = m_Height = m_Descent = 0;
m_ScriptMode = wxHTML_SCRIPT_NORMAL; // <sub> or <sup> mode
m_ScriptBaseline = 0; // <sub> or <sup> baseline
m_CanLiveOnPagebreak = true;
m_Link = NULL;
}
wxHtmlCell::~wxHtmlCell()
{
delete m_Link;
}
// Update the descent value when whe are in a <sub> or <sup>.
// prevbase is the parent base
void wxHtmlCell::SetScriptMode(wxHtmlScriptMode mode, long previousBase)
{
m_ScriptMode = mode;
if (mode == wxHTML_SCRIPT_SUP)
m_ScriptBaseline = previousBase - (m_Height + 1) / 2;
else if (mode == wxHTML_SCRIPT_SUB)
m_ScriptBaseline = previousBase + (m_Height + 1) / 6;
else
m_ScriptBaseline = 0;
m_Descent += m_ScriptBaseline;
}
bool wxHtmlCell::ProcessMouseClick(wxHtmlWindowInterface *window,
const wxPoint& pos,
const wxMouseEvent& event)
{
wxCHECK_MSG( window, false, wxT("window interface must be provided") );
wxHtmlLinkInfo *lnk = GetLink(pos.x, pos.y);
bool retval = false;
if (lnk)
{
wxHtmlLinkInfo lnk2(*lnk);
lnk2.SetEvent(&event);
lnk2.SetHtmlCell(this);
window->OnHTMLLinkClicked(lnk2);
retval = true;
}
return retval;
}
wxCursor
wxHtmlCell::GetMouseCursor(wxHtmlWindowInterface* WXUNUSED(window)) const
{
// This is never called directly, only from GetMouseCursorAt() and we
// return an invalid cursor by default to let it delegate to the window.
return wxNullCursor;
}
wxCursor
wxHtmlCell::GetMouseCursorAt(wxHtmlWindowInterface *window,
const wxPoint& relPos) const
{
const wxCursor curCell = GetMouseCursor(window);
if ( curCell.IsOk() )
return curCell;
if ( GetLink(relPos.x, relPos.y) )
{
return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Link);
}
else
{
return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Default);
}
}
bool
wxHtmlCell::AdjustPagebreak(int *pagebreak, int pageHeight) const
{
// Notice that we always break the cells bigger than the page height here
// as otherwise we wouldn't be able to break them at all.
if ( m_Height <= pageHeight &&
(!m_CanLiveOnPagebreak &&
m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak) )
{
*pagebreak = m_PosY;
return true;
}
return false;
}
void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
{
wxDELETE(m_Link);
if (!link.GetHref().empty())
m_Link = new wxHtmlLinkInfo(link);
}
void wxHtmlCell::Layout(int WXUNUSED(w))
{
SetPos(0, 0);
}
const wxHtmlCell* wxHtmlCell::Find(int WXUNUSED(condition), const void* WXUNUSED(param)) const
{
return NULL;
}
wxHtmlCell *wxHtmlCell::FindCellByPos(wxCoord x, wxCoord y,
unsigned flags) const
{
if ( x >= 0 && x < m_Width && y >= 0 && y < m_Height )
{
return wxConstCast(this, wxHtmlCell);
}
else
{
if ((flags & wxHTML_FIND_NEAREST_AFTER) &&
(y < 0 || (y < 0+m_Height && x < 0+m_Width)))
return wxConstCast(this, wxHtmlCell);
else if ((flags & wxHTML_FIND_NEAREST_BEFORE) &&
(y >= 0+m_Height || (y >= 0 && x >= 0)))
return wxConstCast(this, wxHtmlCell);
else
return NULL;
}
}
wxPoint wxHtmlCell::GetAbsPos(wxHtmlCell *rootCell) const
{
wxPoint p(m_PosX, m_PosY);
for (wxHtmlCell *parent = m_Parent; parent && parent != rootCell;
parent = parent->m_Parent)
{
p.x += parent->m_PosX;
p.y += parent->m_PosY;
}
return p;
}
wxHtmlCell *wxHtmlCell::GetRootCell() const
{
wxHtmlCell *c = wxConstCast(this, wxHtmlCell);
while ( c->m_Parent )
c = c->m_Parent;
return c;
}
unsigned wxHtmlCell::GetDepth() const
{
unsigned d = 0;
for (wxHtmlCell *p = m_Parent; p; p = p->m_Parent)
d++;
return d;
}
bool wxHtmlCell::IsBefore(wxHtmlCell *cell) const
{
const wxHtmlCell *c1 = this;
const wxHtmlCell *c2 = cell;
unsigned d1 = GetDepth();
unsigned d2 = cell->GetDepth();
if ( d1 > d2 )
for (; d1 != d2; d1-- )
c1 = c1->m_Parent;
else if ( d1 < d2 )
for (; d1 != d2; d2-- )
c2 = c2->m_Parent;
if ( cell == this )
return true;
while ( c1 && c2 )
{
if ( c1->m_Parent == c2->m_Parent )
{
while ( c1 )
{
if ( c1 == c2 )
return true;
c1 = c1->GetNext();
}
return false;
}
else
{
c1 = c1->m_Parent;
c2 = c2->m_Parent;
}
}
wxFAIL_MSG(wxT("Cells are in different trees"));
return false;
}
//-----------------------------------------------------------------------------
// wxHtmlWordCell
//-----------------------------------------------------------------------------
wxIMPLEMENT_ABSTRACT_CLASS(wxHtmlWordCell, wxHtmlCell);
wxHtmlWordCell::wxHtmlWordCell(const wxString& word, const wxDC& dc) : wxHtmlCell()
, m_Word(word)
{
wxCoord w, h, d;
dc.GetTextExtent(m_Word, &w, &h, &d);
m_Width = w;
m_Height = h;
m_Descent = d;
SetCanLiveOnPagebreak(false);
m_allowLinebreak = true;
}
void wxHtmlWordCell::SetPreviousWord(wxHtmlWordCell *cell)
{
if ( cell && m_Parent == cell->m_Parent &&
!wxIsspace(cell->m_Word.Last()) && !wxIsspace(m_Word[0u]) )
{
m_allowLinebreak = false;
}
}
// Splits m_Word into up to three parts according to selection, returns
// substring before, in and after selection and the points (in relative coords)
// where s2 and s3 start:
void wxHtmlWordCell::Split(const wxDC& dc,
const wxPoint& selFrom, const wxPoint& selTo,
unsigned& pos1, unsigned& pos2) const
{
wxPoint pt1 = (selFrom == wxDefaultPosition) ?
wxDefaultPosition : selFrom - GetAbsPos();
wxPoint pt2 = (selTo == wxDefaultPosition) ?
wxPoint(m_Width, wxDefaultCoord) : selTo - GetAbsPos();
// if the selection is entirely within this cell, make sure pt1 < pt2 in
// order to make the rest of this function simpler:
if ( selFrom != wxDefaultPosition && selTo != wxDefaultPosition &&
selFrom.x > selTo.x )
{
wxPoint tmp = pt1;
pt1 = pt2;
pt2 = tmp;
}
unsigned len = m_Word.length();
unsigned i = 0;
pos1 = 0;
// adjust for cases when the start/end position is completely
// outside the cell:
if ( pt1.y < 0 )
pt1.x = 0;
if ( pt2.y >= m_Height )
pt2.x = m_Width;
// before selection:
// (include character under caret only if in first half of width)
wxArrayInt widths ;
dc.GetPartialTextExtents(m_Word,widths) ;
while( i < len && pt1.x >= widths[i] )
i++ ;
if ( i < len )
{
int charW = (i > 0) ? widths[i] - widths[i-1] : widths[i];
if ( widths[i] - pt1.x < charW/2 )
i++;
}
// in selection:
// (include character under caret only if in first half of width)
unsigned j = i;
while( j < len && pt2.x >= widths[j] )
j++ ;
if ( j < len )
{
int charW = (j > 0) ? widths[j] - widths[j-1] : widths[j];
if ( widths[j] - pt2.x < charW/2 )
j++;
}
pos1 = i;
pos2 = j;
wxASSERT( pos2 >= pos1 );
}
void wxHtmlWordCell::SetSelectionPrivPos(const wxDC& dc, wxHtmlSelection *s) const
{
unsigned p1, p2;
Split(dc,
this == s->GetFromCell() ? s->GetFromPos() : wxDefaultPosition,
this == s->GetToCell() ? s->GetToPos() : wxDefaultPosition,
p1, p2);
if ( this == s->GetFromCell() )
s->SetFromCharacterPos (p1); // selection starts here
if ( this == s->GetToCell() )
s->SetToCharacterPos (p2); // selection ends here
}
static void SwitchSelState(wxDC& dc, wxHtmlRenderingInfo& info,
bool toSelection)
{
wxColour fg = info.GetState().GetFgColour();
wxColour bg = info.GetState().GetBgColour();
if ( toSelection )
{
dc.SetBackgroundMode(wxBRUSHSTYLE_SOLID);
dc.SetTextForeground(info.GetStyle().GetSelectedTextColour(fg));
dc.SetTextBackground(info.GetStyle().GetSelectedTextBgColour(bg));
dc.SetBackground(info.GetStyle().GetSelectedTextBgColour(bg));
}
else
{
const int mode = info.GetState().GetBgMode();
dc.SetBackgroundMode(mode);
dc.SetTextForeground(fg);
dc.SetTextBackground(bg);
if ( mode != wxBRUSHSTYLE_TRANSPARENT )
dc.SetBackground(bg);
}
}
void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
int WXUNUSED(view_y1), int WXUNUSED(view_y2),
wxHtmlRenderingInfo& info)
{
#if 0 // useful for debugging
dc.SetPen(*wxBLACK_PEN);
dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width /* VZ: +1? */ ,m_Height);
#endif
bool drawSelectionAfterCell = false;
if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
{
// Selection changing, we must draw the word piecewise:
wxHtmlSelection *s = info.GetSelection();
wxString txt;
int w, h;
int ofs = 0;
// NB: this is quite a hack: in order to compute selection boundaries
// (in word's characters) we must know current font, which is only
// possible inside rendering code. Therefore we update the
// information here and store it in wxHtmlSelection so that
// ConvertToText can use it later:
if ( !s->AreFromToCharacterPosSet () )
{
SetSelectionPrivPos(dc, s);
}
int part1 = s->GetFromCell()==this ? s->GetFromCharacterPos() : 0;
int part2 = s->GetToCell()==this ? s->GetToCharacterPos() : m_Word.Length();
if ( part1 > 0 )
{
txt = m_Word.Mid(0, part1);
dc.DrawText(txt, x + m_PosX, y + m_PosY);
dc.GetTextExtent(txt, &w, &h);
ofs += w;
}
SwitchSelState(dc, info, true);
txt = m_Word.Mid(part1, part2-part1);
dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
if ( (size_t)part2 < m_Word.length() )
{
dc.GetTextExtent(txt, &w, &h);
ofs += w;
SwitchSelState(dc, info, false);
txt = m_Word.Mid(part2);
dc.DrawText(txt, ofs + x + m_PosX, y + m_PosY);
}
else
drawSelectionAfterCell = true;
}
else
{
wxHtmlSelectionState selstate = info.GetState().GetSelectionState();
// Not changing selection state, draw the word in single mode:
SwitchSelState(dc, info, selstate != wxHTML_SEL_OUT);
// This is a quite horrible hack but it fixes a nasty user-visible
// problem: when drawing underlined text, which is common in wxHTML as
// all links are underlined, there is a 1 pixel gap between the
// underlines because we draw separate words in separate DrawText()
// calls. The right thing to do would be to draw all of them appearing
// on the same line at once (this would probably be more efficient as
// well), but this doesn't seem simple to do, so instead we just draw
// an extra space at a negative offset to ensure that the underline
// spans the previous pixel and so overlaps the one from the previous
// word, if any.
const bool prevUnderlined = info.WasPreviousUnderlined();
const bool thisUnderlined = dc.GetFont().GetUnderlined();
if ( prevUnderlined && thisUnderlined )
{
dc.DrawText(wxS(" "), x + m_PosX - 1, y + m_PosY);
}
info.SetCurrentUnderlined(thisUnderlined);
dc.DrawText(m_Word, x + m_PosX, y + m_PosY);
drawSelectionAfterCell = (selstate != wxHTML_SEL_OUT);
}
// NB: If the text is justified then there is usually some free space
// between adjacent cells and drawing the selection only onto cells
// would result in ugly unselected spaces. The code below detects
// this special case and renders the selection *outside* the sell,
// too.
if ( m_Parent->GetAlignHor() == wxHTML_ALIGN_JUSTIFY &&
drawSelectionAfterCell )
{
wxHtmlCell *nextCell = m_Next;
while ( nextCell && nextCell->IsFormattingCell() )
nextCell = nextCell->GetNext();
if ( nextCell )
{
int nextX = nextCell->GetPosX();
if ( m_PosX + m_Width < nextX )
{
dc.SetBrush(dc.GetBackground());
dc.SetPen(*wxTRANSPARENT_PEN);
dc.DrawRectangle(x + m_PosX + m_Width, y + m_PosY,
nextX - m_PosX - m_Width, m_Height);
}
}
}
}
wxCursor wxHtmlWordCell::GetMouseCursor(wxHtmlWindowInterface *window) const
{
if ( !GetLink() )
{
return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Text);
}
else
{
return wxHtmlCell::GetMouseCursor(window);
}
}
wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
{
if ( s && (this == s->GetFromCell() || this == s->GetToCell()) )
{
// VZ: we may be called before we had a chance to re-render ourselves
// and in this case GetFrom/ToPrivPos() is not set yet -- assume
// that this only happens in case of a double/triple click (which
// seems to be the case now) and so it makes sense to select the
// entire contents of the cell in this case
//
// TODO: but this really needs to be fixed in some better way later...
if ( s->AreFromToCharacterPosSet() )
{
const int part1 = s->GetFromCell()==this ? s->GetFromCharacterPos() : 0;
const int part2 = s->GetToCell()==this ? s->GetToCharacterPos() : m_Word.Length();
if ( part1 == part2 )
return wxEmptyString;
return GetPartAsText(part1, part2);
}
//else: return the whole word below
}
return GetAllAsText();
}
wxString wxHtmlWordWithTabsCell::GetAllAsText() const
{
return m_wordOrig;
}
wxString wxHtmlWordWithTabsCell::GetPartAsText(int begin, int end) const
{
// NB: The 'begin' and 'end' positions are in the _displayed_ text
// (stored in m_Word) and not in the text with tabs that should
// be copied to clipboard (m_wordOrig).
//
// NB: Because selection is performed on displayed text, it's possible
// to select e.g. "half of TAB character" -- IOW, 'begin' and 'end'
// may be in the middle of TAB character expansion into ' 's. In this
// case, we copy the TAB character to clipboard once.
wxASSERT( begin < end );
const unsigned SPACES_PER_TAB = 8;
wxString sel;
int pos = 0;
wxString::const_iterator i = m_wordOrig.begin();
// find the beginning of text to copy:
for ( ; pos < begin; ++i )
{
if ( *i == '\t' )
{
pos += 8 - (m_linepos + pos) % SPACES_PER_TAB;
if ( pos >= begin )
{
sel += '\t';
}
}
else
{
++pos;
}
}
// copy the content until we reach 'end':
for ( ; pos < end; ++i )
{
const wxChar c = *i;
sel += c;
if ( c == '\t' )
pos += 8 - (m_linepos + pos) % SPACES_PER_TAB;
else
++pos;
}
return sel;
}
//-----------------------------------------------------------------------------
// wxHtmlContainerCell
//-----------------------------------------------------------------------------
wxIMPLEMENT_ABSTRACT_CLASS(wxHtmlContainerCell, wxHtmlCell);
wxHtmlContainerCell::wxHtmlContainerCell(wxHtmlContainerCell *parent) : wxHtmlCell()
{
m_Cells = m_LastCell = NULL;
m_Parent = parent;
m_MaxTotalWidth = 0;
if (m_Parent) m_Parent->InsertCell(this);
m_AlignHor = wxHTML_ALIGN_LEFT;
m_AlignVer = wxHTML_ALIGN_BOTTOM;
m_IndentLeft = m_IndentRight = m_IndentTop = m_IndentBottom = 0;
m_WidthFloat = 100; m_WidthFloatUnits = wxHTML_UNITS_PERCENT;
m_Border = 0;
m_MinHeight = 0;
m_MinHeightAlign = wxHTML_ALIGN_TOP;
m_LastLayout = -1;
}
wxHtmlContainerCell::~wxHtmlContainerCell()
{
wxHtmlCell *cell = m_Cells;
while ( cell )
{
wxHtmlCell *cellNext = cell->GetNext();
delete cell;
cell = cellNext;
}
}
void wxHtmlContainerCell::SetIndent(int i, int what, int units)
{
int val = (units == wxHTML_UNITS_PIXELS) ? i : -i;
if (what & wxHTML_INDENT_LEFT) m_IndentLeft = val;
if (what & wxHTML_INDENT_RIGHT) m_IndentRight = val;
if (what & wxHTML_INDENT_TOP) m_IndentTop = val;
if (what & wxHTML_INDENT_BOTTOM) m_IndentBottom = val;
m_LastLayout = -1;
}
int wxHtmlContainerCell::GetIndent(int ind) const
{
if (ind & wxHTML_INDENT_LEFT) return m_IndentLeft;
else if (ind & wxHTML_INDENT_RIGHT) return m_IndentRight;
else if (ind & wxHTML_INDENT_TOP) return m_IndentTop;
else if (ind & wxHTML_INDENT_BOTTOM) return m_IndentBottom;
else return -1; /* BUG! Should not be called... */
}
int wxHtmlContainerCell::GetIndentUnits(int ind) const
{
bool p = false;
if (ind & wxHTML_INDENT_LEFT) p = m_IndentLeft < 0;
else if (ind & wxHTML_INDENT_RIGHT) p = m_IndentRight < 0;
else if (ind & wxHTML_INDENT_TOP) p = m_IndentTop < 0;
else if (ind & wxHTML_INDENT_BOTTOM) p = m_IndentBottom < 0;
if (p) return wxHTML_UNITS_PERCENT;
else return wxHTML_UNITS_PIXELS;
}
bool
wxHtmlContainerCell::AdjustPagebreak(int *pagebreak, int pageHeight) const
{
if (!m_CanLiveOnPagebreak)
return wxHtmlCell::AdjustPagebreak(pagebreak, pageHeight);
bool rt = false;
int pbrk = *pagebreak - m_PosY;
for ( wxHtmlCell *c = GetFirstChild(); c; c = c->GetNext() )
{
if (c->AdjustPagebreak(&pbrk, pageHeight))
rt = true;
}
if (rt)
*pagebreak = pbrk + m_PosY;
return rt;
}
void wxHtmlContainerCell::Layout(int w)
{
wxHtmlCell::Layout(w);
if (m_LastLayout == w)
return;
m_LastLayout = w;
// VS: Any attempt to layout with negative or zero width leads to hell,
// but we can't ignore such attempts completely, since it sometimes
// happen (e.g. when trying how small a table can be), so use at least one
// pixel width, this will at least give us the correct height sometimes.
if (w < 1)
w = 1;
wxHtmlCell *nextCell;
long xpos = 0, ypos = m_IndentTop;
int xdelta = 0, ybasicpos = 0, ydiff;
int s_width, nextWordWidth, s_indent;
int ysizeup = 0, ysizedown = 0;
int MaxLineWidth = 0;
int curLineWidth = 0;
m_MaxTotalWidth = 0;
/*
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;
}
else
{
if (m_WidthFloat < 0) m_Width = w + m_WidthFloat;
else m_Width = m_WidthFloat;
}
if (m_Cells)
{
int l = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
int r = (m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight;
for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
cell->Layout(m_Width - (l + r));
}
/*
LAYOUT :
*/
// adjust indentation:
s_indent = (m_IndentLeft < 0) ? (-m_IndentLeft * m_Width / 100) : m_IndentLeft;
s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
// my own layout:
wxHtmlCell *cell = m_Cells,
*line = m_Cells;
while (cell != NULL)
{
switch (m_AlignVer)
{
case wxHTML_ALIGN_TOP : ybasicpos = 0; break;
case wxHTML_ALIGN_BOTTOM : ybasicpos = - cell->GetHeight(); break;
case wxHTML_ALIGN_CENTER : ybasicpos = - cell->GetHeight() / 2; break;
}
ydiff = cell->GetHeight() + ybasicpos;
if (cell->GetDescent() + ydiff > ysizedown) ysizedown = cell->GetDescent() + ydiff;
if (ybasicpos + cell->GetDescent() < -ysizeup) ysizeup = - (ybasicpos + cell->GetDescent());
// layout nonbreakable run of cells:
cell->SetPos(xpos, ybasicpos + cell->GetDescent());
xpos += cell->GetWidth();
if (!cell->IsTerminalCell())
{
// Container cell indicates new line
if (curLineWidth > m_MaxTotalWidth)
m_MaxTotalWidth = curLineWidth;
if (wxMax(cell->GetWidth(), cell->GetMaxTotalWidth()) > m_MaxTotalWidth)
m_MaxTotalWidth = cell->GetMaxTotalWidth();
curLineWidth = 0;
}
else
// Normal cell, add maximum cell width to line width
curLineWidth += cell->GetMaxTotalWidth();
cell = cell->GetNext();
// compute length of the next word that would be added:
nextWordWidth = 0;
if (cell)
{
nextCell = cell;
do
{
nextWordWidth += nextCell->GetWidth();
nextCell = nextCell->GetNext();
} while (nextCell && !nextCell->IsLinebreakAllowed());
}
// force new line if occurred:
if ((cell == NULL) ||
(xpos + nextWordWidth > s_width && cell->IsLinebreakAllowed()))
{
if (xpos > MaxLineWidth) MaxLineWidth = xpos;
if (ysizeup < 0) ysizeup = 0;
if (ysizedown < 0) ysizedown = 0;
switch (m_AlignHor) {
case wxHTML_ALIGN_LEFT :
case wxHTML_ALIGN_JUSTIFY :
xdelta = 0;
break;
case wxHTML_ALIGN_RIGHT :
xdelta = 0 + (s_width - xpos);
break;
case wxHTML_ALIGN_CENTER :
xdelta = 0 + (s_width - xpos) / 2;
break;
}
if (xdelta < 0) xdelta = 0;
xdelta += s_indent;
ypos += ysizeup;
if (m_AlignHor != wxHTML_ALIGN_JUSTIFY || cell == NULL)
{
while (line != cell)
{
line->SetPos(line->GetPosX() + xdelta,
ypos + line->GetPosY());
line = line->GetNext();
}
}
else // align == justify
{
// we have to distribute the extra horz space between the cells
// on this line
// an added complication is that some cells have fixed size and
// shouldn't get any increment (it so happens that these cells
// also don't allow line break on them which provides with an
// easy way to test for this) -- and neither should the cells
// adjacent to them as this could result in a visible space
// between two cells separated by, e.g. font change, cell which
// is wrong
int step = s_width - xpos;
if ( step > 0 )
{
// first count the cells which will get extra space
int total = -1;
const wxHtmlCell *c;
if ( line != cell )
{
for ( c = line; c != cell; c = c->GetNext() )
{
if ( c->IsLinebreakAllowed() )
{
total++;
}
}
}
// and now extra space to those cells which merit it
if ( total )
{
// first visible cell on line is not moved:
while (line !=cell && !line->IsLinebreakAllowed())
{
line->SetPos(line->GetPosX() + s_indent,
line->GetPosY() + ypos);
line = line->GetNext();
}
if (line != cell)
{
line->SetPos(line->GetPosX() + s_indent,
line->GetPosY() + ypos);
line = line->GetNext();
}
for ( int n = 0; line != cell; line = line->GetNext() )
{
if ( line->IsLinebreakAllowed() )
{
// offset the next cell relative to this one
// thus increasing our size
n++;
}
line->SetPos(line->GetPosX() + s_indent +
((n * step) / total),
line->GetPosY() + ypos);
}
}
else
{
// this will cause the code to enter "else branch" below:
step = 0;
}
}
// else branch:
if ( step <= 0 ) // no extra space to distribute
{
// just set the indent properly
while (line != cell)
{
line->SetPos(line->GetPosX() + s_indent,
line->GetPosY() + ypos);
line = line->GetNext();
}
}
}
ypos += ysizedown;
xpos = 0;
ysizeup = ysizedown = 0;
line = cell;
}
}
// setup height & width, depending on container layout:
m_Height = ypos + (ysizedown + ysizeup) + m_IndentBottom;
if (m_Height < m_MinHeight)
{
if (m_MinHeightAlign != wxHTML_ALIGN_TOP)
{
int diff = m_MinHeight - m_Height;
if (m_MinHeightAlign == wxHTML_ALIGN_CENTER) diff /= 2;
cell = m_Cells;
while (cell)
{
cell->SetPos(cell->GetPosX(), cell->GetPosY() + diff);
cell = cell->GetNext();
}
}
m_Height = m_MinHeight;
}
if (curLineWidth > m_MaxTotalWidth)
m_MaxTotalWidth = curLineWidth;
m_MaxTotalWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
}
void wxHtmlContainerCell::UpdateRenderingStatePre(wxHtmlRenderingInfo& info,
wxHtmlCell *cell) const
{
wxHtmlSelection *s = info.GetSelection();
if (!s) return;
if (s->GetFromCell() == cell || s->GetToCell() == cell)
{
info.GetState().SetSelectionState(wxHTML_SEL_CHANGING);
}
}
void wxHtmlContainerCell::UpdateRenderingStatePost(wxHtmlRenderingInfo& info,
wxHtmlCell *cell) const
{
wxHtmlSelection *s = info.GetSelection();
if (!s) return;
if (s->GetToCell() == cell)
info.GetState().SetSelectionState(wxHTML_SEL_OUT);
else if (s->GetFromCell() == cell)
info.GetState().SetSelectionState(wxHTML_SEL_IN);
}
#define mMin(a, b) (((a) < (b)) ? (a) : (b))
#define mMax(a, b) (((a) < (b)) ? (b) : (a))
void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
wxHtmlRenderingInfo& info)
{
#if 0 // useful for debugging
dc.SetPen(*wxRED_PEN);
dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
#endif
int xlocal = x + m_PosX;
int ylocal = y + m_PosY;
if (m_BkColour.IsOk())
{
wxBrush myb = wxBrush(m_BkColour, wxBRUSHSTYLE_SOLID);
int real_y1 = mMax(ylocal, view_y1);
int real_y2 = mMin(ylocal + m_Height - 1, view_y2);
dc.SetBrush(myb);
dc.SetPen(*wxTRANSPARENT_PEN);
dc.DrawRectangle(xlocal, real_y1, m_Width, real_y2 - real_y1 + 1);
}
if (m_Border == 1)
{
// draw thin border using lines
wxPen mypen1(m_BorderColour1, 1, wxPENSTYLE_SOLID);
wxPen mypen2(m_BorderColour2, 1, wxPENSTYLE_SOLID);
dc.SetPen(mypen1);
dc.DrawLine(xlocal, ylocal, xlocal, ylocal + m_Height - 1);
dc.DrawLine(xlocal, ylocal, xlocal + m_Width, ylocal);
dc.SetPen(mypen2);
dc.DrawLine(xlocal + m_Width - 1, ylocal, xlocal + m_Width - 1, ylocal + m_Height - 1);
dc.DrawLine(xlocal, ylocal + m_Height - 1, xlocal + m_Width, ylocal + m_Height - 1);
}
else if (m_Border> 0)
{
wxBrush mybrush1(m_BorderColour1, wxBRUSHSTYLE_SOLID);
wxBrush mybrush2(m_BorderColour2, wxBRUSHSTYLE_SOLID);
// draw upper left corner
// 0---------------5
// | /
// | 3-----------4
// | |
// | 2
// |/
// 1
wxPoint poly[6];
poly[0].x =m_PosX; poly[0].y = m_PosY ;
poly[1].x =m_PosX; poly[1].y = m_PosY + m_Height;
poly[2].x =m_PosX + m_Border; poly[2].y = poly[1].y - m_Border;
poly[3].x =poly[2].x ; poly[3].y = m_PosY + m_Border;
poly[4].x =m_PosX + m_Width - m_Border; poly[4].y = poly[3].y;
poly[5].x =m_PosX + m_Width; poly[5].y = m_PosY;
dc.SetBrush(mybrush1);
dc.SetPen(*wxTRANSPARENT_PEN);
dc.DrawPolygon(6, poly, x, y);
// draw lower right corner reusing point 1,2,4 and 5
// 5
// /|
// 4 |
// | |
// 2-----------3 |
// / |
// 1---------------0
dc.SetBrush(mybrush2);
poly[0].x = poly[5].x; poly[0].y = poly[1].y;
poly[3].x = poly[4].x; poly[3].y = poly[2].y;
dc.DrawPolygon(6, poly, x, y);
// smooth color transition like firefox
wxColour borderMediumColour(
(m_BorderColour1.Red() + m_BorderColour2.Red()) /2 ,
(m_BorderColour1.Green() + m_BorderColour2.Green()) /2 ,
(m_BorderColour1.Blue() + m_BorderColour2.Blue()) /2
);
wxPen mypen3(borderMediumColour, 1, wxPENSTYLE_SOLID);
dc.SetPen(mypen3);
dc.DrawLines(2, &poly[1], x, y - 1); // between 1 and 2
dc.DrawLines(2, &poly[4], x, y - 1); // between 4 and 5
}
if (m_Cells)
{
// draw container's contents:
for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
{
// optimize drawing: don't render off-screen content:
if ((ylocal + cell->GetPosY() <= view_y2) &&
(ylocal + cell->GetPosY() + cell->GetHeight() > view_y1))
{
// the cell is visible, draw it:
UpdateRenderingStatePre(info, cell);
cell->Draw(dc,
xlocal, ylocal, view_y1, view_y2,
info);
UpdateRenderingStatePost(info, cell);
}
else
{
// the cell is off-screen, proceed with font+color+etc.
// changes only:
cell->DrawInvisible(dc, xlocal, ylocal, info);
}
}
}
}
void wxHtmlContainerCell::DrawInvisible(wxDC& dc, int x, int y,
wxHtmlRenderingInfo& info)
{
if (m_Cells)
{
for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
{
UpdateRenderingStatePre(info, cell);
cell->DrawInvisible(dc, x + m_PosX, y + m_PosY, info);
UpdateRenderingStatePost(info, cell);
}
}
}
wxColour wxHtmlContainerCell::GetBackgroundColour()
{
return m_BkColour;
}
wxHtmlLinkInfo *wxHtmlContainerCell::GetLink(int x, int y) const
{
wxHtmlCell *cell = FindCellByPos(x, y);
// VZ: I don't know if we should pass absolute or relative coords to
// wxHtmlCell::GetLink()? As the base class version just ignores them
// anyhow, it hardly matters right now but should still be clarified
return cell ? cell->GetLink(x, y) : NULL;
}
void wxHtmlContainerCell::InsertCell(wxHtmlCell *f)
{
if (!m_Cells) m_Cells = m_LastCell = f;
else
{
m_LastCell->SetNext(f);
m_LastCell = f;
if (m_LastCell) while (m_LastCell->GetNext()) m_LastCell = m_LastCell->GetNext();
}
f->SetParent(this);
m_LastLayout = -1;
}
void wxHtmlContainerCell::Detach(wxHtmlCell *cell)
{
wxHtmlCell* const firstChild = GetFirstChild();
if ( cell == firstChild )
{
m_Cells = cell->GetNext();
if ( m_LastCell == cell )
m_LastCell = NULL;
}
else // Not the first child.
{
for ( wxHtmlCell* prev = firstChild;; )
{
wxHtmlCell* const next = prev->GetNext();
// We can't reach the end of the children list without finding this
// cell, normally.
wxCHECK_RET( next, "Detaching cell which is not our child" );
if ( cell == next )
{
prev->SetNext(cell->GetNext());
if ( m_LastCell == cell )
m_LastCell = prev;
break;
}
prev = next;
}
}
cell->SetParent(NULL);
cell->SetNext(NULL);
}
void wxHtmlContainerCell::SetAlign(const wxHtmlTag& tag)
{
wxString alg;
if (tag.GetParamAsString(wxT("ALIGN"), &alg))
{
alg.MakeUpper();
if (alg == wxT("CENTER"))
SetAlignHor(wxHTML_ALIGN_CENTER);
else if (alg == wxT("LEFT"))
SetAlignHor(wxHTML_ALIGN_LEFT);
else if (alg == wxT("JUSTIFY"))
SetAlignHor(wxHTML_ALIGN_JUSTIFY);
else if (alg == wxT("RIGHT"))
SetAlignHor(wxHTML_ALIGN_RIGHT);
m_LastLayout = -1;
}
}
void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale)
{
int wdi;
bool wpercent;
if (tag.GetParamAsIntOrPercent(wxT("WIDTH"), &wdi, wpercent))
{
if (wpercent)
{
SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
}
else
{
SetWidthFloat((int)(pixel_scale * (double)wdi), wxHTML_UNITS_PIXELS);
}
m_LastLayout = -1;
}
}
const wxHtmlCell* wxHtmlContainerCell::Find(int condition, const void* param) const
{
if (m_Cells)
{
for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
{
const wxHtmlCell *r = cell->Find(condition, param);
if (r) return r;
}
}
return NULL;
}
wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
unsigned flags) const
{
if ( flags & wxHTML_FIND_EXACT )
{
for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
{
int cx = cell->GetPosX(),
cy = cell->GetPosY();
if ( (cx <= x) && (cx + cell->GetWidth() > x) &&
(cy <= y) && (cy + cell->GetHeight() > y) )
{
return cell->FindCellByPos(x - cx, y - cy, flags);
}
}
}
else if ( flags & wxHTML_FIND_NEAREST_AFTER )
{
wxHtmlCell *c;
for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
{
if ( cell->IsFormattingCell() )
continue;
int cellY = cell->GetPosY();
if (!( y < cellY || (y < cellY + cell->GetHeight() &&
x < cell->GetPosX() + cell->GetWidth()) ))
continue;
c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
if (c) return c;
}
}
else if ( flags & wxHTML_FIND_NEAREST_BEFORE )
{
wxHtmlCell *c2, *c = NULL;
for ( const wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext() )
{
if ( cell->IsFormattingCell() )
continue;
int cellY = cell->GetPosY();
if (!( cellY + cell->GetHeight() <= y ||
(y >= cellY && x >= cell->GetPosX()) ))
break;
c2 = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
if (c2)
c = c2;
}
if (c) return c;
}
return NULL;
}
bool wxHtmlContainerCell::ProcessMouseClick(wxHtmlWindowInterface *window,
const wxPoint& pos,
const wxMouseEvent& event)
{
bool retval = false;
wxHtmlCell *cell = FindCellByPos(pos.x, pos.y);
if ( cell )
retval = cell->ProcessMouseClick(window, pos, event);
return retval;
}
wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
{
if ( m_Cells )
{
wxHtmlCell *c2;
for (wxHtmlCell *c = m_Cells; c; c = c->GetNext())
{
c2 = c->GetFirstTerminal();
if ( c2 )
return c2;
}
}
return NULL;
}
wxHtmlCell *wxHtmlContainerCell::GetLastTerminal() const
{
if ( m_Cells )
{
// most common case first:
wxHtmlCell *c = m_LastCell->GetLastTerminal();
if ( c )
return c;
wxHtmlCell *ctmp;
wxHtmlCell *c2 = NULL;
for (c = m_Cells; c; c = c->GetNext())
{
ctmp = c->GetLastTerminal();
if ( ctmp )
c2 = ctmp;
}
return c2;
}
else
return NULL;
}
static bool IsEmptyContainer(wxHtmlContainerCell *cell)
{
for ( wxHtmlCell *c = cell->GetFirstChild(); c; c = c->GetNext() )
{
if ( !c->IsTerminalCell() || !c->IsFormattingCell() )
return false;
}
return true;
}
void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)
{
if ( top )
SetIndent(0, wxHTML_INDENT_TOP);
if ( bottom )
SetIndent(0, wxHTML_INDENT_BOTTOM);
if ( m_Cells )
{
wxHtmlCell *c;
wxHtmlContainerCell *cont;
if ( top )
{
for ( c = m_Cells; c; c = c->GetNext() )
{
if ( c->IsTerminalCell() )
{
if ( !c->IsFormattingCell() )
break;
}
else
{
cont = (wxHtmlContainerCell*)c;
if ( IsEmptyContainer(cont) )
{
cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
}
else
{
cont->RemoveExtraSpacing(true, false);
break;
}
}
}
}
if ( bottom )
{
wxArrayPtrVoid arr;
for ( c = m_Cells; c; c = c->GetNext() )
arr.Add((void*)c);
for ( int i = arr.GetCount() - 1; i >= 0; i--)
{
c = (wxHtmlCell*)arr[i];
if ( c->IsTerminalCell() )
{
if ( !c->IsFormattingCell() )
break;
}
else
{
cont = (wxHtmlContainerCell*)c;
if ( IsEmptyContainer(cont) )
{
cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
}
else
{
cont->RemoveExtraSpacing(false, true);
break;
}
}
}
}
}
}
// --------------------------------------------------------------------------
// wxHtmlColourCell
// --------------------------------------------------------------------------
wxIMPLEMENT_ABSTRACT_CLASS(wxHtmlColourCell, wxHtmlCell);
void wxHtmlColourCell::Draw(wxDC& dc,
int x, int y,
int WXUNUSED(view_y1), int WXUNUSED(view_y2),
wxHtmlRenderingInfo& info)
{
DrawInvisible(dc, x, y, info);
}
void wxHtmlColourCell::DrawInvisible(wxDC& dc,
int WXUNUSED(x), int WXUNUSED(y),
wxHtmlRenderingInfo& info)
{
wxHtmlRenderingState& state = info.GetState();
if (m_Flags & wxHTML_CLR_FOREGROUND)
{
state.SetFgColour(m_Colour);
if (state.GetSelectionState() != wxHTML_SEL_IN)
dc.SetTextForeground(m_Colour);
else
dc.SetTextForeground(
info.GetStyle().GetSelectedTextColour(m_Colour));
}
if (m_Flags & wxHTML_CLR_BACKGROUND)
{
state.SetBgColour(m_Colour);
state.SetBgMode(wxBRUSHSTYLE_SOLID);
const wxColour c = state.GetSelectionState() == wxHTML_SEL_IN
? info.GetStyle().GetSelectedTextBgColour(m_Colour)
: m_Colour;
dc.SetTextBackground(c);
dc.SetBackground(c);
dc.SetBackgroundMode(wxBRUSHSTYLE_SOLID);
}
if (m_Flags & wxHTML_CLR_TRANSPARENT_BACKGROUND)
{
state.SetBgColour(m_Colour);
state.SetBgMode(wxBRUSHSTYLE_TRANSPARENT);
const wxColour c = state.GetSelectionState() == wxHTML_SEL_IN
? info.GetStyle().GetSelectedTextBgColour(m_Colour)
: m_Colour;
dc.SetTextBackground(c);
dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
}
}
// ---------------------------------------------------------------------------
// wxHtmlFontCell
// ---------------------------------------------------------------------------
wxIMPLEMENT_ABSTRACT_CLASS(wxHtmlFontCell, wxHtmlCell);
void wxHtmlFontCell::Draw(wxDC& dc,
int WXUNUSED(x), int WXUNUSED(y),
int WXUNUSED(view_y1), int WXUNUSED(view_y2),
wxHtmlRenderingInfo& WXUNUSED(info))
{
dc.SetFont(m_Font);
}
void wxHtmlFontCell::DrawInvisible(wxDC& dc, int WXUNUSED(x), int WXUNUSED(y),
wxHtmlRenderingInfo& WXUNUSED(info))
{
dc.SetFont(m_Font);
}
// ---------------------------------------------------------------------------
// wxHtmlWidgetCell
// ---------------------------------------------------------------------------
wxIMPLEMENT_ABSTRACT_CLASS(wxHtmlWidgetCell, wxHtmlCell);
wxHtmlWidgetCell::wxHtmlWidgetCell(wxWindow *wnd, int w)
{
int sx, sy;
m_Wnd = wnd;
m_Wnd->GetSize(&sx, &sy);
m_Width = sx, m_Height = sy;
m_WidthFloat = w;
}
void wxHtmlWidgetCell::Draw(wxDC& WXUNUSED(dc),
int WXUNUSED(x), int WXUNUSED(y),
int WXUNUSED(view_y1), int WXUNUSED(view_y2),
wxHtmlRenderingInfo& WXUNUSED(info))
{
int absx = 0, absy = 0, stx, sty;
wxHtmlCell *c = this;
while (c)
{
absx += c->GetPosX();
absy += c->GetPosY();
c = c->GetParent();
}
wxScrolledWindow *scrolwin =
wxDynamicCast(m_Wnd->GetParent(), wxScrolledWindow);
wxCHECK_RET( scrolwin,
wxT("widget cells can only be placed in wxHtmlWindow") );
scrolwin->GetViewStart(&stx, &sty);
m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx,
absy - wxHTML_SCROLL_STEP * sty,
m_Width, m_Height);
}
void wxHtmlWidgetCell::DrawInvisible(wxDC& WXUNUSED(dc),
int WXUNUSED(x), int WXUNUSED(y),
wxHtmlRenderingInfo& WXUNUSED(info))
{
int absx = 0, absy = 0, stx, sty;
wxHtmlCell *c = this;
while (c)
{
absx += c->GetPosX();
absy += c->GetPosY();
c = c->GetParent();
}
((wxScrolledWindow*)(m_Wnd->GetParent()))->GetViewStart(&stx, &sty);
m_Wnd->SetSize(absx - wxHTML_SCROLL_STEP * stx, absy - wxHTML_SCROLL_STEP * sty, m_Width, m_Height);
}
void wxHtmlWidgetCell::Layout(int w)
{
if (m_WidthFloat != 0)
{
m_Width = (w * m_WidthFloat) / 100;
m_Wnd->SetSize(m_Width, m_Height);
}
wxHtmlCell::Layout(w);
}
// ----------------------------------------------------------------------------
// wxHtmlTerminalCellsInterator
// ----------------------------------------------------------------------------
const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
{
if ( !m_pos )
return NULL;
do
{
if ( m_pos == m_to )
{
m_pos = NULL;
return NULL;
}
if ( m_pos->GetNext() )
m_pos = m_pos->GetNext();
else
{
// we must go up the hierarchy until we reach container where this
// is not the last child, and then go down to first terminal cell:
while ( m_pos->GetNext() == NULL )
{
m_pos = m_pos->GetParent();
if ( !m_pos )
return NULL;
}
m_pos = m_pos->GetNext();
}
while ( m_pos->GetFirstChild() != NULL )
m_pos = m_pos->GetFirstChild();
} while ( !m_pos->IsTerminalCell() );
return m_pos;
}
#endif
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