}
}
- /**
- * Goes through the Wokrbook, optimising the cell styles
- * by removing duplicate ones, and ones that aren't used.
- * For best results, optimise the fonts via a call to
- * {@link #optimiseFonts(HSSFWorkbook)} first.
- * @param workbook The workbook in which to optimise the cell styles
- */
- public static void optimiseCellStyles(HSSFWorkbook workbook) {
- // Where each style has ended up, and if we need to
- // delete the record for it. Start off with no change
- short[] newPos =
- new short[workbook.getWorkbook().getNumExFormats()];
- boolean[] isUsed = new boolean[newPos.length];
- boolean[] zapRecords = new boolean[newPos.length];
- for(int i=0; i<newPos.length; i++) {
- isUsed[i] = false;
- newPos[i] = (short)i;
- zapRecords[i] = false;
- }
-
- // Get each style record, so we can do deletes
- // without getting confused
- ExtendedFormatRecord[] xfrs = new ExtendedFormatRecord[newPos.length];
- for(int i=0; i<newPos.length; i++) {
- xfrs[i] = workbook.getWorkbook().getExFormatAt(i);
- }
-
- // Loop over each style, seeing if it is the same
- // as an earlier one. If it is, point users of the
- // later duplicate copy to the earlier one, and
- // mark the later one as needing deleting
- // Only work on user added ones, which come after 20
- for(int i=21; i<newPos.length; i++) {
- // Check this one for being a duplicate
- // of an earlier one
- int earlierDuplicate = -1;
- for(int j=0; j<i && earlierDuplicate == -1; j++) {
- ExtendedFormatRecord xfCheck = workbook.getWorkbook().getExFormatAt(j);
- if(xfCheck.equals(xfrs[i])) {
- earlierDuplicate = j;
- }
- }
-
- // If we got a duplicate, mark it as such
- if(earlierDuplicate != -1) {
- newPos[i] = (short)earlierDuplicate;
- zapRecords[i] = true;
- }
- }
-
- // Loop over all the cells in the file, and identify any user defined
- // styles aren't actually being used (don't touch built-in ones)
- for(int sheetNum=0; sheetNum<workbook.getNumberOfSheets(); sheetNum++) {
- HSSFSheet s = workbook.getSheetAt(sheetNum);
- for (Row row : s) {
- for (Cell cellI : row) {
- HSSFCell cell = (HSSFCell)cellI;
- short oldXf = cell.getCellValueRecord().getXFIndex();
- isUsed[oldXf] = true;
- }
- }
- }
- // Mark any that aren't used as needing zapping
- for (int i=21; i<isUsed.length; i++) {
- if (! isUsed[i]) {
- // Un-used style, can be removed
- zapRecords[i] = true;
- newPos[i] = 0;
- }
- }
-
- // Update the new positions based on
- // deletes that have occurred between
- // the start and them
- // Only work on user added ones, which come after 20
- for(int i=21; i<newPos.length; i++) {
- // Find the number deleted to that
- // point, and adjust
- short preDeletePos = newPos[i];
- short newPosition = preDeletePos;
- for(int j=0; j<preDeletePos; j++) {
- if(zapRecords[j]) newPosition--;
- }
-
- // Update the new position
- newPos[i] = newPosition;
- }
-
- // Zap the un-needed user style records
- // removing by index, because removing by object may delete
- // styles we did not intend to (the ones that _were_ duplicated and not the duplicates)
- int max = newPos.length;
- int removed = 0; // to adjust index after deletion
- for(int i=21; i<max; i++) {
- if(zapRecords[i + removed]) {
- workbook.getWorkbook().removeExFormatRecord(i);
- i--;
- max--;
- removed++;
- }
- }
-
- // Finally, update the cells to point at their new extended format records
- for(int sheetNum=0; sheetNum<workbook.getNumberOfSheets(); sheetNum++) {
- HSSFSheet s = workbook.getSheetAt(sheetNum);
- for (Row row : s) {
- for (Cell cellI : row) {
- HSSFCell cell = (HSSFCell)cellI;
- short oldXf = cell.getCellValueRecord().getXFIndex();
-
- HSSFCellStyle newStyle = workbook.getCellStyleAt(
- newPos[oldXf]
- );
- cell.setCellStyle(newStyle);
- }
- }
- }
- }
+ /**
+ * Goes through the Wokrbook, optimising the cell styles
+ * by removing duplicate ones, and ones that aren't used.
+ * For best results, optimise the fonts via a call to
+ * {@link #optimiseFonts(HSSFWorkbook)} first.
+ * @param workbook The workbook in which to optimise the cell styles
+ */
+ public static void optimiseCellStyles(HSSFWorkbook workbook) {
+ // Where each style has ended up, and if we need to
+ // delete the record for it. Start off with no change
+ short[] newPos = new short[workbook.getWorkbook().getNumExFormats()];
+ boolean[] isUsed = new boolean[newPos.length];
+ boolean[] zapRecords = new boolean[newPos.length];
+ for(int i=0; i<newPos.length; i++) {
+ isUsed[i] = false;
+ newPos[i] = (short)i;
+ zapRecords[i] = false;
+ }
+
+ // Get each style record, so we can do deletes
+ // without getting confused
+ ExtendedFormatRecord[] xfrs = new ExtendedFormatRecord[newPos.length];
+ for(int i=0; i<newPos.length; i++) {
+ xfrs[i] = workbook.getWorkbook().getExFormatAt(i);
+ }
+
+ // Loop over each style, seeing if it is the same
+ // as an earlier one. If it is, point users of the
+ // later duplicate copy to the earlier one, and
+ // mark the later one as needing deleting
+ // Only work on user added ones, which come after 20
+ for(int i=21; i<newPos.length; i++) {
+ // Check this one for being a duplicate
+ // of an earlier one
+ int earlierDuplicate = -1;
+ for(int j=0; j<i && earlierDuplicate == -1; j++) {
+ ExtendedFormatRecord xfCheck = workbook.getWorkbook().getExFormatAt(j);
+ if(xfCheck.equals(xfrs[i])) {
+ earlierDuplicate = j;
+ }
+ }
+
+ // If we got a duplicate, mark it as such
+ if(earlierDuplicate != -1) {
+ newPos[i] = (short)earlierDuplicate;
+ zapRecords[i] = true;
+ }
+ }
+
+ // Loop over all the cells in the file, and identify any user defined
+ // styles aren't actually being used (don't touch built-in ones)
+ for(int sheetNum=0; sheetNum<workbook.getNumberOfSheets(); sheetNum++) {
+ HSSFSheet s = workbook.getSheetAt(sheetNum);
+ for (Row row : s) {
+ for (Cell cellI : row) {
+ HSSFCell cell = (HSSFCell)cellI;
+ short oldXf = cell.getCellValueRecord().getXFIndex();
+ isUsed[oldXf] = true;
+ }
+ }
+ }
+ // Mark any that aren't used as needing zapping
+ for (int i=21; i<isUsed.length; i++) {
+ if (! isUsed[i]) {
+ // Un-used style, can be removed
+ zapRecords[i] = true;
+ newPos[i] = 0;
+ }
+ }
+
+ // Update the new positions based on
+ // deletes that have occurred between
+ // the start and them
+ // Only work on user added ones, which come after 20
+ for(int i=21; i<newPos.length; i++) {
+ // Find the number deleted to that
+ // point, and adjust
+ short preDeletePos = newPos[i];
+ short newPosition = preDeletePos;
+ for(int j=0; j<preDeletePos; j++) {
+ if(zapRecords[j]) newPosition--;
+ }
+
+ // Update the new position
+ newPos[i] = newPosition;
+ }
+
+ // Zap the un-needed user style records
+ // removing by index, because removing by object may delete
+ // styles we did not intend to (the ones that _were_ duplicated and not the duplicates)
+ int max = newPos.length;
+ int removed = 0; // to adjust index after deletion
+ for(int i=21; i<max; i++) {
+ if(zapRecords[i + removed]) {
+ workbook.getWorkbook().removeExFormatRecord(i);
+ i--;
+ max--;
+ removed++;
+ }
+ }
+
+ // Finally, update the cells to point at their new extended format records
+ for(int sheetNum=0; sheetNum<workbook.getNumberOfSheets(); sheetNum++) {
+ HSSFSheet s = workbook.getSheetAt(sheetNum);
+ for (Row row : s) {
+ for (Cell cellI : row) {
+ HSSFCell cell = (HSSFCell)cellI;
+ short oldXf = cell.getCellValueRecord().getXFIndex();
+
+ HSSFCellStyle newStyle = workbook.getCellStyleAt(
+ newPos[oldXf]
+ );
+ cell.setCellStyle(newStyle);
+ }
+ }
+ }
+ }
}
projects / poi.git / commitdiff