*/
package jexer.teditor;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;
+import jexer.bits.CellAttributes;
+
/**
* A Document represents a text file, as a collection of lines.
*/
*/
private boolean overwrite = false;
+ /**
+ * If true, the document has been edited.
+ */
+ private boolean dirty = false;
+
+ /**
+ * The default color for the TEditor class.
+ */
+ private CellAttributes defaultColor = null;
+
+ /**
+ * The text highlighter to use.
+ */
+ private Highlighter highlighter = new Highlighter();
+
/**
* Get the overwrite flag.
*
return overwrite;
}
+ /**
+ * Get the dirty value.
+ *
+ * @return true if the buffer is dirty
+ */
+ public boolean isDirty() {
+ return dirty;
+ }
+
+ /**
+ * Save contents to file.
+ *
+ * @param filename file to save to
+ * @throws IOException if a java.io operation throws
+ */
+ public void saveToFilename(final String filename) throws IOException {
+ OutputStreamWriter output = null;
+ try {
+ output = new OutputStreamWriter(new FileOutputStream(filename),
+ "UTF-8");
+
+ for (Line line: lines) {
+ output.write(line.getRawString());
+ output.write("\n");
+ }
+
+ dirty = false;
+ }
+ finally {
+ if (output != null) {
+ output.close();
+ }
+ }
+ }
+
/**
* Set the overwrite flag.
*
return lineNumber;
}
+ /**
+ * Get the current editing line.
+ *
+ * @return the line
+ */
+ public Line getCurrentLine() {
+ return lines.get(lineNumber);
+ }
+
/**
* Get a specific line by number.
*
*/
public void setLineNumber(final int n) {
if ((n < 0) || (n > lines.size())) {
- throw new IndexOutOfBoundsException("Line size is " + lines.size() +
- ", requested index " + n);
+ throw new IndexOutOfBoundsException("Lines array size is " +
+ lines.size() + ", requested index " + n);
}
lineNumber = n;
}
+ /**
+ * Get the current cursor position of the editing line.
+ *
+ * @return the cursor position
+ */
+ public int getCursor() {
+ return lines.get(lineNumber).getCursor();
+ }
+
+ /**
+ * Set the current cursor position of the editing line. 0-based.
+ *
+ * @param cursor the new cursor position
+ */
+ public void setCursor(final int cursor) {
+ lines.get(lineNumber).setCursor(cursor);
+ }
+
+ /**
+ * Construct a new Document from an existing text string.
+ *
+ * @param str the text string
+ * @param defaultColor the color for unhighlighted text
+ */
+ public Document(final String str, final CellAttributes defaultColor) {
+ this.defaultColor = defaultColor;
+
+ // TODO: set different colors based on file extension
+ highlighter.setJavaColors();
+
+ String [] rawLines = str.split("\n");
+ for (int i = 0; i < rawLines.length; i++) {
+ lines.add(new Line(rawLines[i], this.defaultColor, highlighter));
+ }
+ }
+
/**
* Increment the line number by one. If at the last line, do nothing.
+ *
+ * @return true if the editing line changed
*/
- public void down() {
+ public boolean down() {
if (lineNumber < lines.size() - 1) {
+ int x = lines.get(lineNumber).getCursor();
lineNumber++;
+ if (x > lines.get(lineNumber).getDisplayLength()) {
+ lines.get(lineNumber).end();
+ } else {
+ lines.get(lineNumber).setCursor(x);
+ }
+ return true;
}
+ return false;
}
/**
* increment only to the last line.
*
* @param n the number of lines to increment by
+ * @return true if the editing line changed
*/
- public void down(final int n) {
- lineNumber += n;
- if (lineNumber > lines.size() - 1) {
- lineNumber = lines.size() - 1;
+ public boolean down(final int n) {
+ if (lineNumber < lines.size() - 1) {
+ int x = lines.get(lineNumber).getCursor();
+ lineNumber += n;
+ if (lineNumber > lines.size() - 1) {
+ lineNumber = lines.size() - 1;
+ }
+ if (x > lines.get(lineNumber).getDisplayLength()) {
+ lines.get(lineNumber).end();
+ } else {
+ lines.get(lineNumber).setCursor(x);
+ }
+ return true;
}
+ return false;
}
/**
* Decrement the line number by one. If at the first line, do nothing.
+ *
+ * @return true if the editing line changed
*/
- public void up() {
+ public boolean up() {
if (lineNumber > 0) {
+ int x = lines.get(lineNumber).getCursor();
lineNumber--;
+ if (x > lines.get(lineNumber).getDisplayLength()) {
+ lines.get(lineNumber).end();
+ } else {
+ lines.get(lineNumber).setCursor(x);
+ }
+ return true;
}
+ return false;
}
/**
* decrement only to the first line.
*
* @param n the number of lines to decrement by
+ * @return true if the editing line changed
*/
- public void up(final int n) {
- lineNumber -= n;
- if (lineNumber < 0) {
- lineNumber = 0;
+ public boolean up(final int n) {
+ if (lineNumber > 0) {
+ int x = lines.get(lineNumber).getCursor();
+ lineNumber -= n;
+ if (lineNumber < 0) {
+ lineNumber = 0;
+ }
+ if (x > lines.get(lineNumber).getDisplayLength()) {
+ lines.get(lineNumber).end();
+ } else {
+ lines.get(lineNumber).setCursor(x);
+ }
+ return true;
}
+ return false;
}
/**
* Decrement the cursor by one. If at the first column, do nothing.
+ *
+ * @return true if the cursor position changed
*/
- public void left() {
- lines.get(lineNumber).left();
+ public boolean left() {
+ if (!lines.get(lineNumber).left()) {
+ // We are on the leftmost column, wrap
+ if (up()) {
+ end();
+ } else {
+ return false;
+ }
+ }
+ return true;
}
/**
* Increment the cursor by one. If at the last column, do nothing.
+ *
+ * @return true if the cursor position changed
*/
- public void right() {
- lines.get(lineNumber).right();
+ public boolean right() {
+ if (!lines.get(lineNumber).right()) {
+ // We are on the rightmost column, wrap
+ if (down()) {
+ home();
+ } else {
+ return false;
+ }
+ }
+ return true;
}
/**
* Go to the first column of this line.
+ *
+ * @return true if the cursor position changed
*/
- public void home() {
- lines.get(lineNumber).home();
+ public boolean home() {
+ return lines.get(lineNumber).home();
}
/**
* Go to the last column of this line.
+ *
+ * @return true if the cursor position changed
*/
- public void end() {
- lines.get(lineNumber).end();
+ public boolean end() {
+ return lines.get(lineNumber).end();
}
/**
* Delete the character under the cursor.
*/
public void del() {
- lines.get(lineNumber).del();
+ dirty = true;
+ int cursor = lines.get(lineNumber).getCursor();
+ if (cursor < lines.get(lineNumber).getDisplayLength() - 1) {
+ lines.get(lineNumber).del();
+ } else if (lineNumber < lines.size() - 2) {
+ // Join two lines
+ StringBuilder newLine = new StringBuilder(lines.
+ get(lineNumber).getRawString());
+ newLine.append(lines.get(lineNumber + 1).getRawString());
+ lines.set(lineNumber, new Line(newLine.toString(),
+ defaultColor, highlighter));
+ lines.get(lineNumber).setCursor(cursor);
+ lines.remove(lineNumber + 1);
+ }
}
/**
* Delete the character immediately preceeding the cursor.
*/
public void backspace() {
- lines.get(lineNumber).backspace();
+ dirty = true;
+ int cursor = lines.get(lineNumber).getCursor();
+ if (cursor > 0) {
+ lines.get(lineNumber).backspace();
+ } else if (lineNumber > 0) {
+ // Join two lines
+ lineNumber--;
+ String firstLine = lines.get(lineNumber).getRawString();
+ if (firstLine.length() > 0) {
+ // Backspacing combining two lines
+ StringBuilder newLine = new StringBuilder(firstLine);
+ newLine.append(lines.get(lineNumber + 1).getRawString());
+ lines.set(lineNumber, new Line(newLine.toString(),
+ defaultColor, highlighter));
+ lines.get(lineNumber).setCursor(firstLine.length());
+ lines.remove(lineNumber + 1);
+ } else {
+ // Backspacing an empty line
+ lines.remove(lineNumber);
+ lines.get(lineNumber).setCursor(0);
+ }
+ }
+ }
+
+ /**
+ * Split the current line into two, like pressing the enter key.
+ */
+ public void enter() {
+ dirty = true;
+ int cursor = lines.get(lineNumber).getCursor();
+ String original = lines.get(lineNumber).getRawString();
+ String firstLine = original.substring(0, cursor);
+ String secondLine = original.substring(cursor);
+ lines.add(lineNumber + 1, new Line(secondLine, defaultColor,
+ highlighter));
+ lines.set(lineNumber, new Line(firstLine, defaultColor, highlighter));
+ lineNumber++;
+ lines.get(lineNumber).home();
}
/**
* @param ch the character to replace or insert
*/
public void addChar(final char ch) {
- lines.get(lineNumber).addChar(ch);
+ dirty = true;
+ if (overwrite) {
+ lines.get(lineNumber).replaceChar(ch);
+ } else {
+ lines.get(lineNumber).addChar(ch);
+ }
}
/**
return n;
}
- /**
- * Construct a new Document from an existing text string.
- *
- * @param str the text string
- */
- public Document(final String str) {
- String [] rawLines = str.split("\n");
- for (int i = 0; i < rawLines.length; i++) {
- lines.add(new Line(rawLines[i]));
- }
- }
-
}
git://git.nikiroo.be / nikiroo-utils.git / blobdiff