/* A fix for handling column cases TODO FIXME */
private void UpdateSelectionCol(System.Windows.Point pos, DocPage page)
{
bool new_page = true;
TextLine start_line, end_line;
double x = 0, y, w = 0, h;
bool found_first = false;
bool above_anchor = true;
bool first_line_full = false;
bool last_line_full = false;
for (int kk = 0; kk < m_textSelect.Count; kk++)
if (m_textSelect[kk].pagenum == page.PageNum)
new_page = false;
/* See if we have gone back to a previous page */
if (!new_page && page.PageNum != m_textSelect[m_textSelect.Count - 1].pagenum)
{
DocPage curr_page = m_docPages[m_textSelect[m_textSelect.Count - 1].pagenum];
curr_page.SelHeight = 0;
curr_page.SelWidth = 0;
m_textSelect.RemoveAt(m_textSelect.Count - 1);
m_lineptrs[curr_page.PageNum].Clear();
curr_page.SelectedLines.Clear();
}
if (new_page)
{
/* New page */
page.SelX = pos.X;
page.SelY = pos.Y;
page.SelAnchorX = m_docPages[m_textSelect[m_textSelect.Count - 1].pagenum].SelAnchorX;
if (m_textSelect[m_textSelect.Count - 1].pagenum > page.PageNum)
{
page.SelAnchorY = page.Height;
}
else
{
page.SelAnchorY = 0;
}
page.SelColor = m_regionselect;
textSelectInfo_t info = new textSelectInfo_t();
info.pagenum = page.PageNum;
info.first_line_full = false;
info.last_line_full = false;
m_textSelect.Add(info);
/* Create new holder for lines highlighted */
m_lineptrs[page.PageNum] = new LinesText();
}
if (page.TextBlocks == null || page.TextBlocks.Count == 0)
return;
/* Width changes translate across the pages */
for (int jj = 0; jj < m_textSelect.Count; jj++)
{
DocPage curr_page = m_docPages[m_textSelect[jj].pagenum];
x = Math.Min(pos.X, curr_page.SelAnchorX);
w = Math.Max(pos.X, curr_page.SelAnchorX) - x;
curr_page.SelX = x;
curr_page.SelWidth = w;
}
/* Height is just the current page */
y = Math.Min(pos.Y, page.SelAnchorY);
h = Math.Max(pos.Y, page.SelAnchorY) - y;
/* Determine if we are going up or down */
if (pos.Y > page.SelAnchorY)
above_anchor = false;
page.SelY = y;
page.SelHeight = h;
/* Clear out what we currently have */
m_lineptrs[page.PageNum].Clear();
/* Stuff already selected above us */
if (m_textSelect.Count > 1)
found_first = true;
/* Moving backwards through pages */
if (m_textSelect.Count > 1 && m_textSelect[m_textSelect.Count - 2].pagenum > page.PageNum)
found_first = false;
/* To properly handle the multiple columns we have to find the last
* line and make sure that all blocks between our first and last
* line are included. To do this we do an initial step through the
* blocks looking at our intersections */
int first_block = -1;
int last_block = -1;
for (int jj = 0; jj < page.TextBlocks.Count; jj++ )
{
var intersect_blk = page.TextBlocks[jj].CheckIntersection(x, y, w, h);
if (intersect_blk == Intersection_t.NONE && first_block != -1)
{
last_block = jj; /* NB: this is just past last block */
break;
}
else if (intersect_blk != Intersection_t.NONE && first_block == -1)
first_block = jj; /* NB: this is the first block */
}
if (first_block == -1)
return;
if (last_block == -1)
{
/* Only 1 block */
last_block = first_block + 1;
}
for (int jj = first_block; jj < last_block; jj++)
{
/* Text blocks are already scaled. Lines are not */
var intersect_blk = page.TextBlocks[jj].CheckIntersection(x, y, w, h);
var lines = page.TextBlocks[jj].TextLines;
if (jj == first_block || jj == last_block - 1)
{
/* Partial cases */
if (intersect_blk == Intersection_t.FULL)
{
for (int kk = 0; kk < lines.Count; kk++)
m_lineptrs[page.PageNum].Add(lines[kk]);
if (jj == first_block)
{
first_line_full = true;
found_first = true;
}
if (jj == last_block - 1)
{
last_line_full = true;
}
}
else if (intersect_blk == Intersection_t.PARTIAL)
{
for (int kk = 0; kk < lines.Count; kk++)
{
double scale = m_doczoom / lines[kk].Scale;
var intersect_line = lines[kk].CheckIntersection(x * scale, y * scale, w * scale, h * scale);
if (intersect_line == Intersection_t.FULL)
{
m_lineptrs[page.PageNum].Add(lines[kk]);
found_first = true;
if (jj == 0 && kk == 0)
first_line_full = true;
if (jj == page.TextBlocks.Count - 1 &&
kk == lines.Count - 1)
last_line_full = true;
}
else if (intersect_line == Intersection_t.PARTIAL)
{
double val;
var lett = lines[kk].TextCharacters;
/* Now go through the width. */
if (found_first)
{
if (above_anchor)
val = page.SelAnchorX;
else
val = pos.X;
/* our second partial line */
if (val > lines[kk].X * scale + lines[kk].Width * scale)
m_lineptrs[page.PageNum].Add(lines[kk]);
else
{
/* Use either anchor point or mouse pos */
end_line = new TextLine();
end_line.TextCharacters = new List<TextCharacter>();
end_line.Height = 0;
end_line.Scale = m_doczoom;
for (int mm = 0; mm < lett.Count; mm++)
{
double letscale = m_doczoom / lett[mm].Scale;
if (lett[mm].X * letscale < val)
{
/* Can set to special color for debug */
end_line.Color = m_textselectcolor;
/* special color for debug */
//end_line.Color = "#4000FF00";
end_line.Height = lines[kk].Height * scale;
end_line.Width = lett[mm].X * letscale + lett[mm].Width * letscale - lines[kk].X * scale;
end_line.Y = lines[kk].Y * scale;
end_line.X = lines[kk].X * scale;
end_line.TextCharacters.Add(lett[mm]);
}
else
break;
}
if (end_line.Height != 0)
m_lineptrs[page.PageNum].Add(end_line);
}
}
else
{
if (!above_anchor)
val = page.SelAnchorX;
else
val = pos.X;
/* our first partial line */
found_first = true;
if (val < lines[kk].X * scale)
m_lineptrs[page.PageNum].Add(lines[kk]);
else
{
start_line = new TextLine();
start_line.TextCharacters = new List<TextCharacter>();
start_line.Height = 0;
start_line.Scale = m_doczoom;
/* Use either anchor point or mouse pos */
for (int mm = 0; mm < lett.Count; mm++)
{
double letscale = m_doczoom / lett[mm].Scale;
if (lett[mm].X * letscale + lett[mm].Width * letscale >= val)
{
start_line.Color = m_textselectcolor;
/* special color for debug */
//start_line.Color = "#40FF0000";
start_line.Height = lines[kk].Height * scale;
start_line.Width = lines[kk].X * scale + lines[kk].Width * scale - lett[mm].X * letscale;
start_line.X = lett[mm].X * letscale;
start_line.Y = lines[kk].Y * scale;
start_line.TextCharacters.Add(lett[mm]);
break;
}
}
if (start_line.Height > 0)
m_lineptrs[page.PageNum].Add(start_line);
}
}
}
}
}
}
else
{
/* Add all the lines for the blocks between the first and last */
for (int kk = 0; kk < lines.Count; kk++)
m_lineptrs[page.PageNum].Add(lines[kk]);
}
}
var txtsel = m_textSelect[m_textSelect.Count - 1];
txtsel.first_line_full = first_line_full;
txtsel.last_line_full = last_line_full;
m_textSelect[m_textSelect.Count - 1] = txtsel;
/* Adjust for scale before assigning */
var temp = m_lineptrs[page.PageNum];
for (int kk = 0; kk < temp.Count; kk++)
{
var rect_item = temp[kk];
double factor = m_doczoom / rect_item.Scale;
temp[kk].Height = temp[kk].Height * factor;
temp[kk].Width = temp[kk].Width * factor;
temp[kk].X = temp[kk].X * factor;
temp[kk].Y = temp[kk].Y * factor;
temp[kk].Scale = m_doczoom;
}
page.SelectedLines = m_lineptrs[page.PageNum];
}
private void InitTextSelection(DocPage page)
{
if (m_textSelect != null)
ClearSelections();
else
m_textSelect = new List<textSelectInfo_t>();
m_intxtselect = true;
textSelectInfo_t selinfo = new textSelectInfo_t();
selinfo.pagenum = page.PageNum;
selinfo.first_line_full = false;
selinfo.last_line_full = false;
m_textSelect.Add(selinfo);
}