private BoundingBox findPictureBoundaries(Region[] regions, bool pictureGoesOnTheLeft)
{
int minBoundary = (int) (0.2 * this.CardWidth); /* approx to remove lines that are close to border */
BoundingBox picBBox = new BoundingBox();
// yuk, I know
if (pictureGoesOnTheLeft)
{
picBBox.x = 0;
picBBox.y = 0;
picBBox.Width = this.CardWidth;
}
else
{
picBBox.x = 0;
picBBox.y = 0;
picBBox.Width = this.CardWidth;
}
BoundingBox bBox;
// Initially lowest point on card; will be modified in loop
// if ever there is some text under the picture
int bottomBoundary = CardHeight;
foreach (Region reg in regions)
{
foreach (Line line in reg.Lines)
{
bBox = new BoundingBox(line.BoundingBox);
// this makes me sick
if (pictureGoesOnTheLeft)
{
if (bBox.x < minBoundary) /* Assumption: Picture for sure doesn't span this line. Now, is this line over or under picture? */
{
if (bBox.y < (0.5 * this.CardHeight)) /* current line is within top half of card. Thus, lower y. */
{
picBBox.y = bBox.y + bBox.Height;
}
else
{
bottomBoundary = bBox.y; /* assume you're at bottom of where picture goes. */
break;
}
}
else /* This is a good line - i.e. picture spans this line */
{
if (bBox.x < picBBox.Width) /* found a line that reduces possible boundary */
{
picBBox.Width = bBox.x;
}
}
}
else // picture is on the right
{
if ((this.CardWidth - (bBox.x + bBox.Width)) < minBoundary) /* Assumption: Picture for sure doesn't span this line. Now, is this line over or under picture? */
{
if (bBox.y < (0.5 * this.CardHeight)) /* current line is within top half of card. Thus, lower y. */
{
picBBox.y = bBox.y + bBox.Height;
}
else
{
bottomBoundary = bBox.y; /* assume you're at bottom of where picture goes. */
break;
}
}
else /* This is a good line - i.e. picture spans this line */
{
if (bBox.x + bBox.Width > picBBox.x) /* found a line that reduces possible boundary */
{
picBBox.x = bBox.x + bBox.Width;
}
}
}
}
}
// set width & height from what we discovered of x & y
picBBox.Height = bottomBoundary - picBBox.y;
if (!pictureGoesOnTheLeft)
{
picBBox.Width = this.CardWidth - picBBox.x;
}
return picBBox;
}
private bool isRightmostRegion(Region[] regions, int targetIndex)
{
BoundingBox targetBBox = new BoundingBox(regions[targetIndex].BoundingBox);
BoundingBox otherBBox;
for (int i = 0; i < regions.Length; i++)
{
if (i == targetIndex) continue;
otherBBox = new BoundingBox(regions[i].BoundingBox);
if (otherBBox.x + otherBBox.Width > targetBBox.x + targetBBox.Width)
{
return targetBBox.Height > otherBBox.Height; /* If they overlap, take the one that takes the most space */
}
}
return true;
}
private async Task writeIdPicture(Region[] regions)
{
// Calculate area between regions and left & right borders.
// The assumption is that the greater the area, the greater the chance that
// it's the area for the picture.
int leftArea = 0, rightArea = 0;
BoundingBox bBox;
for (int i = 0; i < regions.Length; i++)
{
if (isLeftmostRegion(regions, i))
{
bBox = new BoundingBox(regions[i].BoundingBox);
leftArea += (bBox.x * bBox.Height);
}
if (isRightmostRegion(regions, i))
{
bBox = new BoundingBox(regions[i].BoundingBox);
rightArea += ((this.CardWidth - (bBox.x + bBox.Width)) * bBox.Height);
}
}
bool pictureGoesOnTheLeft = leftArea > rightArea;
// TODO: find minimal box
BoundingBox pictureBox = findPictureBoundaries(regions, pictureGoesOnTheLeft);
string imgWrapperDiv = " <div style=\"position: absolute; " +
"width: " + pictureBox.Width + "px; " +
"height: " + pictureBox.Height + "px; " +
"left: " + pictureBox.x + "px; " +
"top : " + pictureBox.y + "px;\">\n";
// place it. Margins are 15% of width/height
string img = " <img src=\"" + this.ReplacementPicturePath + "\" style=\"position: absolute; " +
"width: " + (0.7 * pictureBox.Width) + "px; " +
"height: " + (0.7 * pictureBox.Height) + "px; " +
"margin-left: " + (0.15 * pictureBox.Width) + "px; " +
"margin-top: " + (0.15 * pictureBox.Height) + "px;\"/>";
await FileIO.AppendTextAsync(this.htmlFile, imgWrapperDiv);
await FileIO.AppendTextAsync(this.htmlFile, img);
await FileIO.AppendTextAsync(this.htmlFile, "</div>\n");
}