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Diffstat (limited to 'libXaw/spec/TextSource')
-rw-r--r-- | libXaw/spec/TextSource | 331 |
1 files changed, 0 insertions, 331 deletions
diff --git a/libXaw/spec/TextSource b/libXaw/spec/TextSource deleted file mode 100644 index 852db2dd3..000000000 --- a/libXaw/spec/TextSource +++ /dev/null @@ -1,331 +0,0 @@ -.\" $Xorg: TextSource,v 1.3 2000/08/17 19:42:28 cpqbld Exp $ -.NH 2 -TextSrc Object -.LP -.XS - TextSrc Object -.XE -.IN "TextSrc object" "" "@DEF@" -.LP -.Ds 0 -.TA 2.0i -.ta 2.0i -Application Header file <X11/Xaw/TextSrc.h> -.IN "TextSrc.h" "" -Class Header file <X11/Xaw/TextSrcP.h> -.IN "TextSrcP.h" "" -Class textSrcObjectClass -.IN "textSrcObjectClass" "" -Class Name TextSrc -.IN "TextSrc object" "class name" -Superclass Object -.De -.LP -The TextSrc object is the root object for all text sources. Any new text -source objects should be subclasses of the TextSrc Object. The -TextSrc Class contains all methods the Text widget expects a text -source to export. -.LP -Since all text sources will have some resources in common the -TextSrc defines a few new resources. -.NH 3 -Resources -.LP -When creating an TextSrc object instance, the following resources are -retrieved from the argument list or from the resource database: -.LP -.IN "TextSrc object" "resources" -.TS H -lw(1i) lw(1i) lw(1i) lw(.5i) lw(2i). -_ -.sp 3p -.TB -Name Class Type Notes Default Value -.sp 3p -_ -.TH -.R -.sp 3p -destroyCallback Callback XtCallbackList NULL -editType EditType EditMode NULL -.sp 3p -_ -.TE -.Dc -.Oe Bold -.NH 3 -Subclassing the TextSrc -.IN "TextSrc object" "subclassing" "@DEF@" -.LP -The only purpose of the TextSrc Object is to be subclassed. It contains -the minimum set of class methods that all text sources must have. All -class methods of the TextSrc must be defined, as the Text widget uses -them all. While all may be inherited, the direct descendant of TextSrc -\fBmust\fP specify some of them as TextSrc does not contain enough -information to be a valid text source by itself. Do not try to use the -TextSrc as a valid source for the Text widget; it is not intended to be -used as a source by itself and bad things will probably happen. -.TS H -lw(1i) lw(1.5i) lw(2i) lw(1i). -_ -.sp 3p -.TB -Function Inherit with Public Interface must specify -.sp 3p -_ -.TH -.R -.sp 3p -Read XtInheritRead XawTextSourceRead yes -.IN "XtInheritRead" "" -.IN "XawTextSourceRead" "" -Replace XtInheritReplace XawTextSourceReplace no -.IN "XtInheritReplace" "" -.IN "XawTextSourceReplace" "" -Scan XtInheritScan XawTextSourceScan yes -.IN "XtInheritScan" "" -.IN "XawTextSourceScan" "" -Search XtInheritSearch XawTextSourceSearch no -.IN "XtInheritSearch" "" -.IN "XawTextSourceSearch" "" -SetSelection XtInheritSetSelection XawTextSourceSetSelection no -.IN "XtInheritSetSelection" "" -.IN "XawTextSourceSetSelection" "" -ConvertSelection XtInheritConvertSelection XawTextSourceConvertSelection no -.IN "XtInheritConvertSelection" "" -.IN "XawTextSourceConvertSelection" "" -_ -.TE -.NH 4 -Reading Text. -.LP -To read the text in a text source use the \fBRead\fP function: -.IN "TextSrc object" "Read" "@DEF@" -.FD 0 -XawTextPosition Read(\fIw\fP, \fIpos\fP, \fItext_return\fP, \fIlength\fP) -.br -Widget \fIw\fP; -.br -XawTextPosition \fIpos\fP; -.br -XawTextBlock \fI*text_return\fP; -.br -int \fIlength\fP; -.FN -.IP \fIw\fP 1i -Specifies the TextSrc object. -.IP \fIpos\fP 1i -Specifies the position of the first character to be read from the text buffer. -.IP \fItext\fP 1i -Returns the text read from the source. -.IP \fIlength\fP 1i -Specifies the maximum number of characters the TextSrc should -return to the application in \fItext_return\fP. -.LP -This function returns the text position immediately after the -characters read from the -text buffer. The function is not required to read \fIlength\fP -characters if that many characters are in the file, it may break at -any point that is convenient to the internal structure of the -source. It may take several calls to \fBRead\fP before the desired -portion of the text buffer is fully retrieved. -.NH 4 -Replacing Text. -.LP -To replace or edit the text in a text buffer use the \fBReplace\fP function: -.FD 0 -XawTextPosition Replace(\fIw\fP, \fIstart\fP, \fIend\fP, \fItext\fP) -.IN "TextSrc object" "Replace" @DEF@ -.br -Widget \fIw\fP; -.br -XawTextPosition \fIstart\fP, \fIend\fP; -.br -XawTextBlock \fI*text\fP; -.FN -.IP \fIw\fP 1i -Specifies the TextSrc object. -.IP \fIstart\fP 1i -Specifies the position of the first character to be removed from the text -buffer. This is also the location to begin inserting the new text. -.IP \fIend\fP 1i -Specifies the position immediately after the last character to be -removed from the text buffer. -.IP \fItext\fP 1i -Specifies the text to be added to the text source. -.LP -This function can return any of the following values: -.IP \fBXawEditDone\fP 1.25i -.IN "XawEditDone" "" -The text replacement was successful. -.IP \fBXawPositionError\fP 1.25i -.IN "XawPositionError" "" -The edit mode is \fBXawtextAppend\fP and \fIstart\fP is not the last -character of the source. -.IP \fBXawEditError\fP 1.25i -.IN "XawEditError" "" -Either the Source was read-only or the range to be deleted is larger -than the length of the Source. -.LP -The \fBReplace\fP arguments \fIstart\fP and \fIend\fP represent the -text source character positions for the existing text that is to be -replaced by the text in the text block. The characters from -\fIstart\fP up to but not including \fIend\fP are deleted, and the -buffer specified by the text block is inserted in their -place. If \fIstart\fP and \fIend\fP are equal, no text is deleted and -the new text is inserted after \fIstart\fP. -.NH 4 -Scanning the TextSrc -.LP -To search the text source for one of the predefined boundary types use -the \fBScan\fP function: -.FD 0 -XawTextPosition Scan(\fIw\fP, \fIposition\fP, \fItype\fP, \fIdir\fP, \fIcount\fP, \fIinclude\fP) -.IN "TextSrc object" "Scan" @DEF@ -.br -Widget \fIw\fP; -.br -XawTextPosition \fIposition\fP; -.br -XawTextScanType \fItype\fP; -.br -XawTextScanDirection \fIdir\fP; -.br -int \fIcount\fP; -.br -Boolean \fIinclude\fP; -.FN -.IP \fIw\fP 1i -Specifies the TextSrc object. -.IP \fIposition\fP 1i -Specifies the position to begin scanning the source. -.IP \fItype\fP 1i -Specifies the type of boundary to scan for, may be one of: -\fBXawstPosition\fP, \fBXawstWhiteSpace\fP, \fBXawstEOL\fP, -.IN "XawstPositions" "" -.IN "XawstWhiteSpace" "" -.IN "XawstEOL" "" -\fBXawstParagraph\fP, \fBXawstAll\fP. The exact meaning of these -.IN "XawstParagraph" "" -.IN "XawstAll" "" -boundaries is left up to the individual text source. -.IP \fIdir\fP 1i -Specifies the direction to scan, may be either \fBXawsdLeft\fP to search -.IN "XawsdLeft" "" -backward, or \fBXawsdRight\fP to search forward. -.IN "XawsdRight" "" -.IP \fIcount\fP 1i -Specifies the number of boundaries to scan for. -.IP \fIinclude\fP 1i -Specifies whether the boundary itself should be included in the scan. -.LP -The \fBScan\fP function returns the position in the text source of the desired -boundary. It is expected to return a valid address for -all calls made to it, thus if a particular request is made that would take -the text widget beyond the end of the source it must return the -position of that end. -.NH 4 -Searching through a TextSrc -.LP -To search for a particular string use the \fBSearch\fP function. -.FD 0 -XawTextPosition Search(\fIw\fP, \fIposition\fP, \fIdir\fP, \fItext\fP) -.IN "TextSrc object" "Search" @DEF@ -.br -Widget \fIw\fP; -.br -XawTextPosition \fIposition\fP; -.br -XawTextScanDirection \fIdir\fP; -.br -XawTextBlock \fI*text\fP; -.FN -.IP \fIw\fP 1i -Specifies the TextSrc object. -.IP \fIposition\fP 1i -Specifies the position to begin the search. -.IP \fIdir\fP 1i -Specifies the direction to search, may be either \fBXawsdLeft\fP to search -.IN "XawsdLeft" "" -backward, or \fBXawsdRight\fP to search forward. -.IN "XawsdRight" "" -.IP \fItext\fP 1i -Specifies a text block containing the text to search for. -.LP -This function will search through the text buffer attempting to find a -match for the string in the text block. If a match is found in the -direction specified, then the character location of the first character -in the string is returned. If no text was found then -\fBXawTextSearchError\fP is returned. -.IN "XawTextSearchError" "" -.NH 4 -Text Selections -.LP -While many selection types are handled by the Text widget, text sources -may have selection types unknown to the Text widget. When a selection -conversion is requested by the X server the Text widget will first call -the \fBConvertSelection\fP function, to attempt the selection -conversion. -.FD 0 -Boolean ConvertSelections(\fIw\fP, \fIselection\fP, \fItarget\fP, \fItype\fP, \fIvalue_return\fP, \fIlength_return\fP, \fIformat_return\fP) -.IN "Text widget" "ConvertSelection" @DEF@ -.br -Widget \fIw\fP; -.br -Atom \fI*selection\fP, \fI*target\fP, \fI*type\fP; -.br -caddr_t \fI*value_return\fP; -.br -unsigned long \fI*length_return\fP; -.br -int \fI*format_return\fP; -.FN -.IP \fIw\fP 1i -Specifies the TextSrc object. -.IP \fIselection\fP 1i -Specifies the type of selection that was requested (e.g. \fBPRIMARY\fP). -.IP \fItarget\fP 1i -Specifies the type of the selection that has been requested, which -indicates the desired information about the selection (e.g. Filename, -Text, Window). -.IP \fItype\fP 1i -Specifies a pointer to the atom into which the property type of the converted -value of the selection is to be stored. For instance, either file -name or text might have property type \fBXA_STRING\fP. -.IP \fIvalue_return\fP 1i -Returns a pointer into which a pointer to the converted value of the -selection -is to be stored. The selection owner is responsible for allocating -this storage. The memory is considered owned by the toolkit, and is -freed by XtFree when the Intrinsics selection mechanism is done with it. -.IP \fIlength_return\fP 1i -Returns a pointer into which the number of elements in value is to be stored. -The size of each element is determined by \fIformat\fP. -.IP \fIformat_return\fP 1i -Returns a pointer into which the size in bits of the data elements of the -selection value is to be stored. -.LP -If this function returns \fBTrue\fP then the Text widget will assume -that the source has taken care of converting the selection, Otherwise the -Text widget will attempt to convert the selection itself. -.LP -.sp -If the source needs to know when the text selection is modified it -should define a \fBSetSelection\fP procedure: -.FD 0 -void SetSelection(\fIw\fP, \fIstart\fP, \fIend\fP, \fIselection\fP) -Widget \fIw\fP; -.IN "SetSelection" "" @DEF@ -.br -XawTextPosition \fIstart\fP, \fIend\fP; -.br -Atom \fIselection\fP; -.FN -.IP \fIw\fP 1i -Specifies the TextSrc object. -.IP \fIstart\fP 1i -Specifies the character position of the beginning of the new text selection. -.IP \fIend\fP -Specifies the character position of the end of the new text selection. -.IP \fIselection\fP 1i -Specifies the type of selection that was requested (e.g. \fBPRIMARY\fP). |