Examples of com.ibm.richtext.textformat.TextOffset

com.ibm.richtext.textformat.TextOffset
A TextOffset indicates both an integer offset into text and a placement on one of the characters adjacent to the offset. An offset is a position between two characters; offset n is between character n-1 and character n. The placement specifies whether it is associated with the character after the offset (character n) or the character before the offset (character n-1).
Knowing which character the TextOffset is associated with is necessary when displaying carets. In bidirectional text, a single offset may have two distinct carets. Also, in multiline text, an offset at a line break has a possible caret on each line.
Most clients will not be interested in the placement, and will just use the offset.


        int lastLimit = formatter.lineRangeLimit(0);
        final int lineBound = formatter.lineBound();
        int[] hitX = new int[] { -1, 1, lineBound + 2 };


        TextOffset offset = new TextOffset();


        for (int i=1; i < numLines; i++) {


            int height = formatter.lineGraphicStart(i);
            if (lastLimit != formatter.lineRangeLow(i)) {

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                pickUpTypingStyle();
                makeTextChangeCommand();
                if (selStart <= fCommand.affectedRangeStart()) {
                    fCommand.prependToOldText(fText.extract(selStart - 1, selStart));
                }
                TextOffset insPt = new TextOffset(selStart - 1);
                fParent.doReplaceText(selStart - 1, selStart, null, insPt, insPt);
            }
        }
        else {
            fTypingStyle = null;
            makeTextChangeCommand();
            TextOffset insPt = new TextOffset(selStart);
            fParent.doReplaceText(selStart, selLimit, null, insPt, insPt);
        }
    }

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    private void doFwdDelete(boolean ignoreCharBreak) {


        int selStart = fSelection.getStart().fOffset;
        int selLimit = fSelection.getEnd().fOffset;


        TextOffset insPt = new TextOffset(selStart);


        if (selStart == selLimit) {
            if (selStart != fText.length()) {
                fTypingStyle = null;
                makeTextChangeCommand();

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        return true;
    }


    private void makeTextChangeCommand() {
        if (fCommand == null) {
            TextOffset  selStart = fSelection.getStart();
            TextOffset  selEnd = fSelection.getEnd();


            MText writableText = new StyledText();
            writableText.replace(0, 0, fText, selStart.fOffset, selEnd.fOffset);
            fCommand = new TextChangeCommand(fParent,
                                writableText,
                                null, selStart.fOffset, selStart, selEnd,
                                new TextOffset(), new TextOffset());


            fListener.textStateChanged(TextPanelEvent.UNDO_STATE_CHANGED);
        }
    }

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        }
    }


    private void postTextChangeCommand() {
        if (fCommand != null) {
            TextOffset  selStart = fSelection.getStart();
            TextOffset  selEnd = fSelection.getEnd();


            fCommand.setNewText(fText.extract(fCommand.affectedRangeStart(), selStart.fOffset));
            fCommand.setSelRangeAfter(selStart, selEnd);
            fCommandLog.add(fCommand);
        }

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        TextRange selRange = fSelection.getSelectionRange();


        if (selRange.start == selRange.limit)
            return;


        doUndoableTextChange(selRange.start, selRange.limit, null, new TextOffset(selRange.
                            start), new TextOffset(selRange.start));
    }

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        if (selRange.start == selRange.limit)
            return;


        fTextComponent.getClipboard().setContents(fText.extract(selRange.start, selRange.limit));
        doUndoableTextChange(selRange.start, selRange.limit, null, new TextOffset(selRange.start), new TextOffset(selRange.start));


        fListener.textStateChanged(TextPanelEvent.CLIPBOARD_CHANGED);
    }

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        TextRange selRange = fSelection.getSelectionRange();
        MConstText clipText = fTextComponent.getClipboard().getContents(AttributeMap.EMPTY_ATTRIBUTE_MAP);


        if (clipText != null) {
            doUndoableTextChange(selRange.start, selRange.limit, clipText,
                                new TextOffset(selRange.start + clipText.length()),
                                new TextOffset(selRange.start + clipText.length()));
        }
        else {
            fListener.textStateChanged(TextPanelEvent.CLIPBOARD_CHANGED);
        }
    }

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     */
    void doReplaceSelectedText(char ch, AttributeMap charStyle) {


        int start = fSelection.getStart().fOffset;
        int limit = fSelection.getEnd().fOffset;
        TextOffset newOffset = new TextOffset(start + 1);
        doReplaceText(start, limit, ch, charStyle, newOffset, newOffset);
    }

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    }


    private void doUndoableStyleChange(Object what,
                                       boolean character) {


        TextOffset selStart = fSelection.getStart();
        TextOffset selEnd = fSelection.getEnd();


        MText oldText = fText.extractWritable(selStart.fOffset, selEnd.fOffset);
        StyleChangeCommand command = new StyleChangeCommand(
                this, oldText, selStart, selEnd, (StyleModifier) what, character);

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Related Classes of com.ibm.richtext.textformat.TextOffset

com.ibm.richtext.test.unit.TestFormatter

com.ibm.richtext.textpanel.ATextPanelImpl

com.ibm.richtext.textpanel.TextChangeCommand

com.ibm.richtext.textpanel.TextCommand

com.ibm.richtext.textpanel.TextComponent

com.ibm.richtext.textpanel.TextEditBehavior

com.ibm.richtext.textpanel.TextSelection

com.ibm.richtext.textpanel.TypingInteractor

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