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NAME
DtEditor.h - editor widget definitions
SYNOPSIS
#include <Dt/Editor.h>
DESCRIPTION
The <Dt/Editor.h> header defines structures, enumerations
and function prototypes for the Editor widget class.
The header defines the DtEditorDataFormat enumeration data
type, with at least the following members:
DtEDITOR_TEXT
The data being transferred is a pointer to a
NULL-terminated string of characters (a char *).
DtEDITOR_WCHAR
The data being transferred is a wide character
string (a wchar_t *).
DtEDITOR_DATA
The data being transferred is a sized buffer (a
DtEditor_DataObj).
The header defines the following structure:
typedef struct {
unsigned int length;
void *buf;
} DtEditor_DataObj;
The length argument is the size in bytes of the data buffer.
The buf argument is a pointer to the data buffer.
The DtEditorContentRec structure is used to transfer data
between an application and Editor widget. It indicates the
type of data being transferred along with the actual data.
typedef struct {
DtEditorDataFormat type;
union {
char *string;
wchar_t *wchar;
DtEditor_DataObj data;
} value;
} DtEditorContentRec;
The type argument indicates the type of data contained in
the structure. The string argument points to a
NULL-terminated string of characters. It is valid when type
is DtEDITOR_TEXT. The wchar argument points to a wide
character string. It is valid when type is DtEDITOR_WCHAR.
The data argument is a DtEditor_DataObj that contains the
size of the data and a pointer to it. It is valid when type
is DtEDITOR_DATA.
The DtEditorChangeValues structure is used optionally to
specify the string to search for and its replacement value
for DtEditorChange(3).
typedef struct {
char *find,
char *changeTo,
} DtEditorChangeValues;
The find argument is a text string to locate in an DtEditor
widget. The changeTo argument is the replacement string for
the one or more occurrences of the string specified in find.
It can be NULL.
The DtEditorFormatSettings structure is used to optionally
specify the left margin setting, right margin setting, and
alignment style for DtEditorFormat(3).
typedef struct {
int leftMargin,
int rightMargin,
unsigned int alignment,
} DtEditorFormatSettings;
The leftMargin argument is the column number of the left
boundary when formatting text. Text is not extended to the
left of this column. It must be non-negative. The right-
Margin argument is the column number of the right boundary
when formatting text. Text is not extended to the right of
this column. It must be larger than leftMargin. The align-
ment argument specifies the style of alignment when format-
ting text (see the constants listed in this header).
The header declares the following variable:
WidgetClass dtEditorWidgetClass;
The header defines the following constants for use with the
DtEditorChange(3) function:
DtEDITOR_ALL_OCCURRENCES
Change all instances of the find string.
DtEDITOR_CURRENT_SELECTION
Replace the currently selected text with the
replacement string.
DtEDITOR_NEXT_OCCURRENCE
Change the next occurrence of the find string after
the insertion cursor.
The header defines the following constants for use with the
DtEditorFormat(3) function:
DtEDITOR_FORMAT_ALL
Reformats all the text in a DtEditor.
DtEDITOR_FORMAT_PARAGRAPH
Reformats only the paragraph containing the inser-
tion cursor.
DtEDITOR_ALIGN_CENTER
Centers each line of text between the left and
right margins.
DtEDITOR_ALIGN_JUSTIFY
Aligns the text flush with both the left and right
margins.
DtEDITOR_ALIGN_LEFT
Aligns the text flush with the left margin.
DtEDITOR_ALIGN_RIGHT
Aligns the text flush with the right margin.
The header defines the following constant for use with the
DtEditorGoToLine(3) function:
DtEDITOR_LAST_LINE
Moves the cursor to the beginning of the last line
in the widget.
The header defines the following DtEditorErrorCode con-
stants:
DtEDITOR_NO_ERRORS
The function completed its task without errors.
DtEDITOR_INSUFFICIENT_MEMORY
Not enough system memory is available to complete
the task.
DtEDITOR_INVALID_TYPE
The specified type is not a recognized DtEditorDa-
taFormat when setting or retrieving contents or the
specified Alignment type is not recognized when
formatting text.
DtEDITOR_INVALID_RANGE
The starting character position in a text replace-
ment is greater than the ending character position
or the specified Amount To Format when formatting
text is not recognized.
DtEDITOR_NULL_ITEM
The data buffer is NULL when passing data in a
buffer.
DtEDITOR_ILLEGAL_SIZE
The specified size of a data buffer is negative
when passing data in a buffer, or the left and
right margin values are illegal when formatting
text.
DtEDITOR_SPELL_FILTER_FAILED
The DtEditor() function cannot successfully execute
the filter specified by the DtNspellFilter
resource.
DtEDITOR_NO_TMP_FILE
The DtEditor() function cannot create a temporary
file in the directory returned by tmpnam(3S).
DtEDITOR_INVALID_FILENAME
No file was specified.
DtEDITOR_NONEXISTENT_FILE
The file specified for reading does not exist.
DtEDITOR_UNREADABLE_FILE
The file specified is unreadable for an unspecified
reason.
DtEDITOR_READ_ONLY_FILE
The file is read only.
DtEDITOR_NULLS_REMOVED
The file contained embedded NULL characters, which
were removed.
DtEDITOR_NO_FILE_ACCESS
The file cannot be accessed.
DtEDITOR_DIRECTORY
The file specified is a directory.
DtEDITOR_CHAR_SPECIAL_FILE
The file specified is a character-special device.
DtEDITOR_BLOCK_MODE_FILE
The file specified is a block-mode device.
DtEDITOR_UNWRITABLE_FILE
The application does not have write permission for
the file or directory.
DtEDITOR_WRITABLE_FILE
The specified file exists and the overwriteIfExists
flag is set to False.
DtEDITOR_SAVE_FAILED
The contents of the widget could not be saved for
an unspecified reason.
The header defines the following enumeration values as rea-
sons for the DtNtextSelectCallback:
DtEDITOR_TEXT_SELECT
Some text has been selected within the edit window
(that is, the selection has become non-NULL).
DtEDITOR_TEXT_DESELECT
No text is selected within the edit window (that
is, the selection has become NULL).
The header defines the following constants as reasons for
the XmNhelpCallback:
DtEDITOR_HELP_EDIT_WINDOW
The help request originated in the edit window.
DtEDITOR_HELP_STATUS_LINE
The help request originated in the status line.
DtEDITOR_HELP_STATUS_CURRENT_LINE
The help request originated from the Current Line
Number display in the status line.
DtEDITOR_HELP_STATUS_TOTAL_LINES
The help request originated from the Total Lines
display in the status line.
DtEDITOR_HELP_STATUS_MESSAGE
The help request originated from the Message field
in the status line.
DtEDITOR_HELP_STATUS_OVERSTRIKE
The help request originated from the Overstrike
indicator in the status line.
DtEDITOR_HELP_FORMAT_DIALOG
The help request originated from the Help button in
the Format Settings dialog.
DtEDITOR_HELP_FORMAT_LEFT_MARGIN
The help request originated from the Left Margin
field in the Format Settings dialog.
DtEDITOR_HELP_FORMAT_RIGHT_MARGIN
The help request originated from the Right Margin
Field in the Format Settings dialog.
DtEDITOR_HELP_FORMAT_ALIGNMENT
The help request originated from the Alignment but-
tons in the Format Settings dialog.
DtEDITOR_HELP_CHANGE_DIALOG
The help request originated from the Help button in
the Find/Change dialog.
DtEDITOR_HELP_CHANGE_FIND
The help request originated from the Find field in
the Find/Change dialog.
DtEDITOR_HELP_CHANGE_CHANGE
The help request originated from the Change To
field in the Find/Change dialog.
DtEDITOR_HELP_SPELL_DIALOG
The help request originated from the Help button in
the Spell dialog.
DtEDITOR_HELP_SPELL_MISSPELLED_WORDS
The help request originated from the list of
misspelled words in the Spell dialog.
DtEDITOR_HELP_SPELL_CHANGE
The help request originated from the Change To
field in the Spell dialog.
The header defines the following as functions:
Widget DtCreateEditor(Widget parent,
char *name,
ArgList arglist,
Cardinal argcount);
DtEditorErrorCode DtEditorAppend(Widget widget,
DtEditorContentRec *data);
DtEditorErrorCode DtEditorAppendFromFile(Widget widget,
char *fileName);
Boolean DtEditorChange(Widget widget,
DtEditorChangeValues *findChangeStrings,
unsigned int instanceToChange);
Boolean DtEditorCheckForUnsavedChanges(Widget widget);
Boolean DtEditorClearSelection(Widget widget);
Boolean DtEditorCopyToClipboard(Widget widget);
Boolean DtEditorCutToClipboard(Widget widget);
Boolean DtEditorDeleteSelection(Widget widget);
Boolean DtEditorDeselect(Widget widget);
void DtEditorDisableRedisplay(Widget widget);
void DtEditorEnableRedisplay(Widget widget);
Boolean DtEditorFind(Widget widget,
char * find);
DtEditorErrorCode DtEditorFormat(Widget widget,
DtEditorFormatSettings *formatSettings,
unsigned int amountToFormat);
DtEditorErrorCode DtEditorGetContents(Widget widget,
DtEditorContentRec *data,
BooleanhardCarriageReturns,
Boolean markContentsAsSaved);
XmTextPosition DtEditorGetInsertionPosition(Widget widget);
XmTextPosition DtEditorGetLastPosition(Widget widget);
Widget DtEditorGetMessageTextFieldID(Widget widget);
void DtEditorGetSizeHints(Widget widget,
XSizeHints *pHints);
void DtEditorGoToLine(Widget widget,
int lineNumber);
DtEditorErrorCode DtEditorInsert(Widget widget,
DtEditorContentRec *data);
DtEditorErrorCode DtEditorInsertFromFile(Widget widget,
char *fileName);
void DtEditorInvokeFindChangeDialog(Widget widget);
void DtEditorInvokeFormatDialog(Widget widget);
DtEditorErrorCode DtEditorInvokeSpellDialog(Widget widget);
Boolean DtEditorPasteFromClipboard(Widget widget);
DtEditorErrorCode DtEditorReplace(Widget widget,
XmTextPosition startPos,
XmTextPosition endPos,
DtEditorContentRec *data);
DtEditorErrorCode DtEditorReplaceFromFile(Widget widget,
XmTextPosition startPos,
XmTextPosition endPos,
char *fileName);
void DtEditorReset(Widget widget);
DtEditorErrorCode DtEditorSaveContentsToFile(Widget widget,
char *fileName,
BooleanoverwriteIfExists,
BooleanhardCarriageReturns,
Boolean markContentsAsSaved);
Boolean DtEditorSelectAll(Widget widget);
DtEditorErrorCode DtEditorSetContents(Widget widget,
DtEditorContentRec *data);
DtEditorErrorCode DtEditorSetContentsFromFile(Widget widget,
char *fileName);
void DtEditorSetInsertionPosition(Widget widget,
XmTextPosition position);
void DtEditorTraverseToEditor(Widget widget);
Boolean DtEditorUndoEdit(Widget widget);
SEE ALSO
DtCreateEditor(3), DtEditor(3), DtEditorAppend(3), DtEdi-
torAppendFromFile(3), DtEditorChange(3), DtEditorCheckForUn-
savedChanges(3), DtEditorClearSelection(3), DtEditorCopyTo-
Clipboard(3), DtEditorCutToClipboard(3), DtEditor-
DeleteSelection(3), DtEditorDeselect(3), DtEditorFind(3),
DtEditorFormat(3), DtEditorGetContents(3), DtEditorGetInser-
tionPosition(3), DtEditorGetLastPosition(3), DtEditorGetMes-
sageTextFieldID(3), DtEditorGetSizeHints(3), DtEditorGoTo-
Line(3), DtEditorInsert(3), DtEditorInsertFromFile(3),
DtEditorInvokeFindChangeDialog(3), DtEditorInvokeFormatDia-
log(3), DtEditorInvokeSpellDialog(3), DtEditorPasteFromClip-
board(3), DtEditorReplace(3), DtEditorReplaceFromFile(3),
DtEditorReset(3), DtEditorSaveContentsToFile(3), DtEditor-
SelectAll(3), DtEditorSetContents(3), DtEditorSetCon-
tentsFromFile(3), DtEditorSetInsertionPosition(3), DtEditor-
TraverseToEditor(3), DtEditorUndoEdit(3).
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