// accessors
//-------------------------------------------------
// line::xoffset
//-------------------------------------------------
public float xoffset()
{
float result;
switch (justify())
{
case text_justify.LEFT:
default:
result = 0;
break;
case text_justify.CENTER:
result = (m_layout.width() - width()) / 2;
break;
case text_justify.RIGHT:
result = m_layout.width() - width();
break;
}
return(result);
}
// accessors
public float xoffset(text_layout layout)
{
return((layout.width() * m_anchor_target) - (m_width * m_anchor_pos));
}
public void align_text(text_layout layout)
{
assert(m_right_justify_start >= m_center_justify_start);
if (m_characters.empty() || m_center_justify_start != 0)
{
// at least some of the text is left-justified - anchor to left
m_anchor_pos = 0.0f;
m_anchor_target = 0.0f;
if ((layout.width() > m_width) && (m_characters.size() > m_center_justify_start))
{
// at least some text is not left-justified
if (m_right_justify_start == m_center_justify_start)
{
// all text that isn't left-justified is right-justified
float right_offset = layout.width() - m_width;
for (size_t i = m_right_justify_start; m_characters.size() > i; ++i)
{
m_characters[i] = new positioned_char()
{
character = m_characters[i].character, style = m_characters[i].style, source = m_characters[i].source, xoffset = m_characters[i].xoffset + right_offset, xwidth = m_characters[i].xwidth
}
}
; //m_characters[i].xoffset += right_offset;
m_width = layout.width();
}
else if (m_characters.size() <= m_right_justify_start)
{
// all text that isn't left-justified is center-justified
float center_width = m_width - m_characters[m_center_justify_start].xoffset;
float center_offset = ((layout.width() - center_width) * 0.5f) - m_characters[m_center_justify_start].xoffset;
if (0.0f < center_offset)
{
for (size_t i = m_center_justify_start; m_characters.size() > i; ++i)
{
m_characters[i] = new positioned_char()
{
character = m_characters[i].character, style = m_characters[i].style, source = m_characters[i].source, xoffset = m_characters[i].xoffset + center_offset, xwidth = m_characters[i].xwidth
}
}
; //m_characters[i].xoffset += center_offset;
m_width += center_offset;
}
}
else
{
// left, right and center-justified parts
float center_width = m_characters[m_right_justify_start].xoffset - m_characters[m_center_justify_start].xoffset;
float center_offset = ((layout.width() - center_width) * 0.5f) - m_characters[m_center_justify_start].xoffset;
float right_offset = layout.width() - m_width;
if (center_offset > right_offset)
{
// right-justified text pushes centre-justified text to the left
for (size_t i = m_center_justify_start; m_right_justify_start > i; ++i)
{
m_characters[i] = new positioned_char()
{
character = m_characters[i].character, style = m_characters[i].style, source = m_characters[i].source, xoffset = m_characters[i].xoffset + right_offset, xwidth = m_characters[i].xwidth
}
}
; //m_characters[i].xoffset += right_offset;
}
else if (0.0f < center_offset)
{
// left-justified text doesn't push centre-justified text to the right
for (size_t i = m_center_justify_start; m_right_justify_start > i; ++i)
{
m_characters[i] = new positioned_char()
{
character = m_characters[i].character, style = m_characters[i].style, source = m_characters[i].source, xoffset = m_characters[i].xoffset + center_offset, xwidth = m_characters[i].xwidth
}
}
; //m_characters[i].xoffset += center_offset;
}
for (size_t i = m_right_justify_start; m_characters.size() > i; ++i)
{
m_characters[i] = new positioned_char()
{
character = m_characters[i].character, style = m_characters[i].style, source = m_characters[i].source, xoffset = m_characters[i].xoffset + right_offset, xwidth = m_characters[i].xwidth
}
}
; //m_characters[i].xoffset += right_offset;
m_width = layout.width();
}
}
}
else if (m_characters.size() <= m_right_justify_start)
{
// all text is center-justified - anchor to center
m_anchor_pos = 0.5f;
m_anchor_target = 0.5f;
}
else
{
// at least some text is right-justified - anchor to right
m_anchor_pos = 1.0f;
m_anchor_target = 1.0f;
if ((layout.width() > m_width) && (m_right_justify_start > m_center_justify_start))
{
// mixed center-justified and right-justified text
float center_width = m_characters[m_right_justify_start].xoffset;
float center_offset = (layout.width() - m_width + (center_width * 0.5f)) - (layout.width() * 0.5f);
if (0.0f < center_offset)
{
for (size_t i = m_right_justify_start; m_characters.size() > i; ++i)
{
m_characters[i] = new positioned_char()
{
character = m_characters[i].character, style = m_characters[i].style, source = m_characters[i].source, xoffset = m_characters[i].xoffset + center_offset, xwidth = m_characters[i].xwidth
}
}
; //m_characters[i].xoffset += center_offset;
m_width += center_offset;
}
}
}
}