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(svn r20045) -Add: Allow SA_BOTTOM alignment in DrawStringMultiLine().

This commit is contained in:
alberth 2010-07-02 13:55:45 +00:00
parent e3bb01a7c4
commit ddb0f1a614
1 changed files with 50 additions and 15 deletions
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65
src/gfx.cpp
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@ -827,7 +827,7 @@ Dimension GetStringMultiLineBoundingBox(StringID str, const Dimension &suggestio
* @param align The horizontal and vertical alignment of the string.
* @param underline Whether to underline all strings
*
* @return The bottom to where we have written.
* @return If \a align is #SA_BOTTOM, the top to where we have written, else the bottom to where we have written.
*/
int DrawStringMultiLine(int left, int right, int top, int bottom, StringID str, TextColour colour, StringAlignment align, bool underline)
{
@ -847,38 +847,73 @@ int DrawStringMultiLine(int left, int right, int top, int bottom, StringID str,
int mt = GetCharacterHeight((FontSize)GB(tmp, 16, 16));
int total_height = num * mt;
int skip_lines = 0;
if (total_height > maxh) {
/* Check there's room enough for at least one line. */
if (maxh < mt) return top;
num = maxh / mt;
if (maxh < mt) return top; // Not enough room for a single line.
if ((align & SA_VERT_MASK) == SA_BOTTOM) {
skip_lines = num;
num = maxh / mt;
skip_lines -= num;
} else {
num = maxh / mt;
}
total_height = num * mt;
}
int y = ((align & SA_VERT_MASK) == SA_VERT_CENTER) ? RoundDivSU(bottom + top - total_height, 2) : top;
int y;
switch (align & SA_VERT_MASK) {
case SA_TOP:
y = top;
break;
case SA_VERT_CENTER:
y = RoundDivSU(bottom + top - total_height, 2);
break;
case SA_BOTTOM:
y = bottom - total_height;
break;
default: NOT_REACHED();
}
const char *src = buffer;
DrawStringParams params(colour);
int written_top = bottom; // Uppermost position of rendering a line of text
for (;;) {
char buf2[DRAW_STRING_BUFFER];
strecpy(buf2, src, lastof(buf2));
DrawString(left, right, y, buf2, lastof(buf2), params, align, underline, false);
if (skip_lines == 0) {
char buf2[DRAW_STRING_BUFFER];
strecpy(buf2, src, lastof(buf2));
DrawString(left, right, y, buf2, lastof(buf2), params, align, underline, false);
if (written_top > y) written_top = y;
y += mt;
num--;
}
for (;;) {
WChar c = Utf8Consume(&src);
if (c == 0) {
y += mt;
if (--num <= 0) {
return y;
}
break;
} else if (c == SCC_SETX) {
src++;
} else if (c == SCC_SETXY) {
src += 2;
} else if (skip_lines > 0) {
/* Skipped drawing, so do additional processing to update params. */
if (c >= SCC_BLUE && c <= SCC_BLACK) {
params.SetColour((TextColour)(c - SCC_BLUE));
} else if (c == SCC_PREVIOUS_COLOUR) { // Revert to the previous colour.
params.SetPreviousColour();
} else if (c == SCC_TINYFONT) {
params.SetFontSize(FS_SMALL);
} else if (c == SCC_BIGFONT) {
params.SetFontSize(FS_LARGE);
}
}
}
if (skip_lines > 0) skip_lines--;
if (num == 0) return ((align & SA_VERT_MASK) == SA_BOTTOM) ? written_top : y;
}
}