gcstringprinter.java

java 文件下载器。可自定义

					if (posWordStart < 0 || posLastWordStart >= lineInfo.originalLine.length())
						break;
					String word = lineInfo.originalLine.substring(posLastWordStart, posWordStart);
					if (word.length() == 0)
					{
						excessPos = -1;
						outputLine.append(' ');
					}
					for (int i = 0; i < word.length(); i += 4000)
					{
						int endPos = i + 4000;
						String subWord;
						if (endPos > word.length())
							subWord = word.substring(i);
						else
							subWord = word.substring(i, endPos);
						excessPos = processWord(gc, lineInfo.originalLine, subWord, printArea, wrap, lineInfo, outputLine, space);
						if (excessPos >= 0)
						{
							excessPos += curPos;
							break;
						}
						if (endPos <= word.length())
							space.setLength(0);
						curPos += subWord.length() + 1;
					}

					if (excessPos >= 0)
						break;
					posLastWordStart = posWordStart + 1;
					posWordStart = lineInfo.originalLine.indexOf(' ', posLastWordStart);
					if (posWordStart < 0)
						posWordStart = lineInfo.originalLine.length();
				} while (true);
			}
		} else
		{
			outputLine.append(lineInfo.originalLine);
		}
		if (!wrap && hasMoreElements && excessPos >= 0)
		{
			int len = outputLine.length();
			if (len > 2)
				len -= 2;
			outputLine.setLength(len);
			outputLine.append("…");
			cutoff = true;
		}
		lineInfo.excessPos = excessPos;
		lineInfo.lineOutputed = outputLine.toString();
		return lineInfo;
	}

	private int processWord(GC gc, String sLine, String word, Rectangle printArea, boolean wrap, LineInfo lineInfo, StringBuffer outputLine, 
			StringBuffer space)
	{
		if (word.length() == 0)
		{
			space.append(' ');
			return -1;
		}
		if (images != null && word.length() >= 2 && word.charAt(0) == '%')
		{
			int imgIdx = word.charAt(1) - 48;
			if (images.length > imgIdx && imgIdx >= 0 && images[imgIdx] != null)
			{
				Image img = images[imgIdx];
				Rectangle bounds = img.getBounds();
				if (imageScales != null && imageScales.length > imgIdx)
				{
					bounds.width = (int)((float)bounds.width * imageScales[imgIdx]);
					bounds.height = (int)((float)bounds.height * imageScales[imgIdx]);
				}
				Point spaceExtent = gc.stringExtent(space.toString());
				int newWidth = lineInfo.width + bounds.width + spaceExtent.x;
				if (newWidth > printArea.width && (bounds.width + spaceExtent.x < printArea.width || lineInfo.width > 0))
					return 0;
				if (lineInfo.imageIndexes == null)
					lineInfo.imageIndexes = (new int[] {
						imgIdx
					});
				int targetWidth = lineInfo.width + newWidth;
				lineInfo.width = newWidth;
				lineInfo.height = Math.max(bounds.height, lineInfo.height);
				Point ptWordSize = gc.stringExtent((new StringBuilder()).append(word.substring(2)).append(" ").toString());
				if (lineInfo.width + ptWordSize.x > printArea.width)
				{
					outputLine.append(space);
					outputLine.append(word.substring(0, 2));
					return 2;
				}
				outputLine.append(space);
				space.setLength(0);
				outputLine.append(word.substring(0, 2));
				word = word.substring(2);
			}
		}
		Point ptWordSize = gc.stringExtent((new StringBuilder()).append(word).append(" ").toString());
		boolean bWordLargerThanWidth = ptWordSize.x > printArea.width;
		if (bWordLargerThanWidth && lineInfo.width > 0)
			return 0;
		int targetWidth = lineInfo.width + ptWordSize.x;
		if (targetWidth > printArea.width)
		{
			int endIndex = word.length();
			long diff = endIndex;
			do
			{
				if (targetWidth == printArea.width)
					break;
				diff = (diff >> 1) + diff % 2L;
				if (diff <= 0L)
					diff = 1L;
				if (targetWidth > printArea.width)
				{
					endIndex = (int)((long)endIndex - diff);
					if (endIndex < 1)
						endIndex = 1;
				} else
				{
					endIndex = (int)((long)endIndex + diff);
					if (endIndex > word.length())
						endIndex = word.length();
				}
				ptWordSize = gc.stringExtent((new StringBuilder()).append(word.substring(0, endIndex)).append(" ").toString());
				targetWidth = lineInfo.width + ptWordSize.x;
			} while (diff > 1L);
			if (endIndex == 0)
				endIndex = 1;
			if (targetWidth > printArea.width && endIndex > 1)
			{
				endIndex--;
				ptWordSize = gc.stringExtent((new StringBuilder()).append(word.substring(0, endIndex)).append(" ").toString());
			}
			if (endIndex > 0 && outputLine.length() > 0)
				outputLine.append(space);
			if (endIndex == 0 && outputLine.length() == 0)
				endIndex = 1;
			if (wrap && ptWordSize.x < printArea.width && !bWordLargerThanWidth)
				return 0;
			outputLine.append(word.substring(0, endIndex));
			if (!wrap)
			{
				int len = outputLine.length();
				if (len == 0)
				{
					if (word.length() > 0)
						outputLine.append(word.charAt(0));
					else
					if (sLine.length() > 0)
						outputLine.append(sLine.charAt(0));
				} else
				{
					if (len > 2)
						len -= 2;
					outputLine.setLength(len);
					outputLine.append("…");
					cutoff = true;
				}
			}
			return endIndex;
		}
		lineInfo.width += ptWordSize.x;
		if (lineInfo.width > printArea.width)
		{
			if (space.length() > 0)
				space.delete(0, space.length());
			if (!wrap)
			{
				int len = outputLine.length();
				if (len == 0)
				{
					if (word.length() > 0)
						outputLine.append(word.charAt(0));
					else
					if (sLine.length() > 0)
						outputLine.append(sLine.charAt(0));
				} else
				{
					if (len > 2)
						len -= 2;
					outputLine.setLength(len);
					outputLine.append("…");
					cutoff = true;
				}
				return -1;
			} else
			{
				return 0;
			}
		}
		if (outputLine.length() > 0)
			outputLine.append(space);
		outputLine.append(word);
		if (space.length() > 0)
			space.delete(0, space.length());
		space.append(' ');
		return -1;
	}

	private void drawLine(GC gc, LineInfo lineInfo, int swtFlags, Rectangle printArea, boolean noDraw)
	{
		String text = lineInfo.lineOutputed;
		if (lineInfo.width == 0 || lineInfo.height == 0)
		{
			Point gcExtent = gc.stringExtent(text);
			if (lineInfo.width == 0)
				lineInfo.width = gcExtent.x;
			if (lineInfo.height == 0)
				lineInfo.height = gcExtent.y;
		}
		Point drawSize = new Point(lineInfo.width, lineInfo.height);
		int x0;
		if ((swtFlags & 0x20000) > 0)
			x0 = (printArea.x + printArea.width) - drawSize.x;
		else
		if ((swtFlags & 0x1000000) > 0)
			x0 = printArea.x + (printArea.width - drawSize.x) / 2;
		else
			x0 = printArea.x;
		int y0 = printArea.y;
		int lineInfoRelEndPos = lineInfo.relStartPos + lineInfo.lineOutputed.length();
		int relStartPos = lineInfo.relStartPos;
		int lineStartPos = 0;
		URLInfo urlInfo = null;
		boolean drawURL = hasHitUrl();
		if (drawURL)
		{
			URLInfo hitUrlInfo[] = getHitUrlInfo();
			int nextHitUrlInfoPos = 0;
			while (drawURL) 
			{
				drawURL = false;
				int i = nextHitUrlInfoPos;
				do
				{
					if (i >= hitUrlInfo.length)
						break;
					urlInfo = hitUrlInfo[i];
					drawURL = urlInfo.relStartPos < lineInfoRelEndPos && urlInfo.relStartPos + urlInfo.titleLength > relStartPos && relStartPos >= lineInfo.relStartPos && relStartPos < lineInfoRelEndPos;
					if (drawURL)
					{
						nextHitUrlInfoPos = i + 1;
						break;
					}
					i++;
				} while (true);
				if (!drawURL)
					break;
				i = (lineStartPos + urlInfo.relStartPos) - relStartPos;
				if (i > 0 && i > lineStartPos && i <= text.length())
				{
					String s = text.substring(lineStartPos, i);
					x0 += drawText(gc, s, x0, y0, lineInfo.height, null, noDraw).x;
					relStartPos += i - lineStartPos;
					lineStartPos += i - lineStartPos;
				}
				int end = i + urlInfo.titleLength;
				if (i < 0)
					i = 0;
				if (end > text.length())
					end = text.length();
				String s = text.substring(i, end);
				relStartPos += end - i;
				lineStartPos += end - i;
				Point pt = null;
				Color fgColor = null;
				if (!noDraw)
				{
					fgColor = gc.getForeground();
					if (urlInfo.dropShadowColor != null)
					{
						gc.setForeground(urlInfo.dropShadowColor);
						drawText(gc, s, x0 + 1, y0 + 1, lineInfo.height, null, noDraw);
					}
					if (urlInfo.urlColor != null)
						gc.setForeground(urlInfo.urlColor);
					else
					if (urlColor != null)
						gc.setForeground(urlColor);
				}
				if (urlInfo.hitAreas == null)
					urlInfo.hitAreas = new ArrayList(1);
				pt = drawText(gc, s, x0, y0, lineInfo.height, urlInfo.hitAreas, noDraw);
				if (!noDraw)
				{
					if (urlInfo.urlUnderline)
						gc.drawLine(x0, (y0 + pt.y) - 1, (x0 + pt.x) - 1, (y0 + pt.y) - 1);
					gc.setForeground(fgColor);
				}
				if (urlInfo.hitAreas == null)
					urlInfo.hitAreas = new ArrayList(1);
				x0 += pt.x;
			}
		}
		if (lineStartPos < text.length())
		{
			String s = text.substring(lineStartPos);
			if (!noDraw)
				drawText(gc, s, x0, y0, lineInfo.height, null, noDraw);
		}
		printArea.y += drawSize.y;
	}

	private Point drawText(GC gc, String s, int x, int y, int height, List hitAreas, boolean nodraw)
	{
		Point textExtent;
		if (images != null)
		{
			int pctPos = s.indexOf('%');
			int lastPos = 0;
			int w = 0;
			int h = 0;
			do
			{
				if (pctPos < 0)
					break;
				if (pctPos >= 0 && s.length() > pctPos + 1)
				{
					int imgIdx = s.charAt(pctPos + 1) - 48;
					String sStart;
					int centerY;
					if (imgIdx >= images.length || imgIdx < 0 || images[imgIdx] == null)
					{
						sStart = s.substring(lastPos, pctPos + 1);
						textExtent = gc.textExtent(sStart);
						centerY = y + (height / 2 - textExtent.y / 2);
						if (hitAreas != null)
							hitAreas.add(new Rectangle(x, centerY, textExtent.x, textExtent.y));
						if (!nodraw)
							gc.drawText(sStart, x, centerY, true);
						x += textExtent.x;
						w += textExtent.x;
						h = Math.max(h, textExtent.y);
						lastPos = pctPos + 1;
						pctPos = s.indexOf('%', pctPos + 1);
						continue;
					}
					sStart = s.substring(lastPos, pctPos);
					textExtent = gc.textExtent(sStart);
					centerY = y + (height / 2 - textExtent.y / 2);
					if (!nodraw)
						gc.drawText(sStart, x, centerY, true);
					x += textExtent.x;
					w += textExtent.x;
					h = Math.max(h, textExtent.y);
					if (hitAreas != null)
						hitAreas.add(new Rectangle(x, centerY, textExtent.x, textExtent.y));
					Rectangle imgBounds = images[imgIdx].getBounds();
					float scale = 1.0F;
					if (imageScales != null && imageScales.length > imgIdx)
						scale = imageScales[imgIdx];
					int scaleImageWidth = (int)((float)imgBounds.width * scale);
					int scaleImageHeight = (int)((float)imgBounds.height * scale);
					centerY = y + (height / 2 - scaleImageHeight / 2);
					if (hitAreas != null)
						hitAreas.add(new Rectangle(x, centerY, scaleImageWidth, scaleImageHeight));
					if (!nodraw)
						gc.drawImage(images[imgIdx], 0, 0, imgBounds.width, imgBounds.height, x, centerY, scaleImageWidth, scaleImageHeight);
					x += scaleImageWidth;
					w += scaleImageWidth;
					h = Math.max(h, scaleImageHeight);
				}
				lastPos = pctPos + 2;
				pctPos = s.indexOf('%', lastPos);
			} while (true);
			if (s.length() >= lastPos)
			{
				String sEnd = s.substring(lastPos);
				textExtent = gc.textExtent(sEnd);
				int centerY = y + (height / 2 - textExtent.y / 2);
				if (hitAreas != null)
					hitAreas.add(new Rectangle(x, centerY, textExtent.x, textExtent.y));
				if (!nodraw)
					gc.drawText(sEnd, x, centerY, true);
				x += textExtent.x;
				w += textExtent.x;