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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| #include "LineEdit.h" | ||
| #include "KeyCodes.h" | ||
|
|
||
| TLineEdit *LineEditCreate(int Flags) | ||
| { | ||
| TLineEdit *LE; | ||
|
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| LE=(TLineEdit *) calloc(1, sizeof(TLineEdit)); | ||
| LE->Flags = Flags; | ||
| if (Flags & LINE_EDIT_HISTORY) LE->History=ListCreate(); | ||
| LE->MaxHistory=30; | ||
|
|
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| return(LE); | ||
| } | ||
|
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| void LineEditDestroy(TLineEdit *LE) | ||
| { | ||
| if (LE) | ||
| { | ||
| if (LE->History) ListDestroy(LE->History, Destroy); | ||
| Destroy(LE->Line); | ||
| free(LE); | ||
| } | ||
| } | ||
|
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|
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| void LineEditSetText(TLineEdit *LE, const char *Text) | ||
| { | ||
| LE->Line=CopyStr(LE->Line, Text); | ||
| LE->Len=StrLen(LE->Line); | ||
| LE->Cursor=LE->Len; | ||
| } | ||
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|
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| void LineEditClearHistory(TLineEdit *LE) | ||
| { | ||
| if (LE->History) ListClear(LE->History, Destroy); | ||
| } | ||
|
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| void LineEditAddToHistory(TLineEdit *LE, const char *Text) | ||
| { | ||
| ListNode *Node; | ||
|
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| if (StrValid(Text)) | ||
| { | ||
| if (! LE->History) LE->History=ListCreate(); | ||
|
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| if (ListSize(LE->History) > LE->MaxHistory) | ||
| { | ||
| Node=ListGetNext(LE->History); | ||
| ListDeleteNode(Node); | ||
| } | ||
|
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| Node=ListGetLast(LE->History); | ||
|
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| if (Node && Node->Tag) | ||
| { | ||
| if (strcmp(Node->Tag, Text) !=0) ListAddNamedItem(LE->History, Text, NULL); | ||
| } | ||
| else ListAddNamedItem(LE->History, Text, NULL); | ||
| } | ||
|
|
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| } | ||
|
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| int LineEditHandleChar(TLineEdit *LE, int Char) | ||
| { | ||
| char *Tempstr=NULL; | ||
| char *ptr; | ||
|
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| switch (Char) | ||
| { | ||
| //seems like control-c sends this | ||
| case STREAM_NODATA: | ||
| case ESCAPE: | ||
| return(LINE_EDIT_CANCEL); | ||
| break; | ||
|
|
||
| case STREAM_TIMEOUT: | ||
| break; | ||
|
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| case TKEY_UP: | ||
| if (LE->History) | ||
| { | ||
| if (LE->History->Side) | ||
| { | ||
| if (LE->History->Side != ListGetNext(LE->History)) LE->History->Side=ListGetPrev(LE->History->Side); | ||
| } | ||
| else LE->History->Side=ListGetLast(LE->History); | ||
|
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| if (LE->History->Side) LineEditSetText(LE, LE->History->Side->Tag); | ||
| } | ||
| break; | ||
|
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| case TKEY_DOWN: | ||
| if (LE->History) | ||
| { | ||
| if (LE->History->Side) | ||
| { | ||
| LE->History->Side=ListGetNext(LE->History->Side); | ||
| if (LE->History->Side) LineEditSetText(LE, LE->History->Side->Tag); | ||
| } | ||
| } | ||
| break; | ||
|
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||
| case TKEY_LEFT: | ||
| if ((! (LE->Flags & LINE_EDIT_NOMOVE)) && (LE->Cursor > 0)) LE->Cursor--; | ||
| break; | ||
|
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| case TKEY_RIGHT: | ||
| if ((! (LE->Flags & LINE_EDIT_NOMOVE)) && (LE->Cursor < LE->Len)) LE->Cursor++; | ||
| break; | ||
|
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| case TKEY_HOME: | ||
| if ((! (LE->Flags & LINE_EDIT_NOMOVE)) && (LE->Cursor < LE->Len)) LE->Cursor=0; | ||
| break; | ||
|
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| case TKEY_END: | ||
| if ((! (LE->Flags & LINE_EDIT_NOMOVE)) && (LE->Cursor < LE->Len)) LE->Cursor=LE->Len; | ||
| break; | ||
|
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||
| //'backspace' key on keyboard will send the 'del' character in some cases! | ||
| case 0x7f: //this is 'del' | ||
| if (LE->Cursor < LE->Len) | ||
| { | ||
| ptr=LE->Line + LE->Cursor; | ||
| if (LE->Cursor < LE->Len) memmove(ptr, ptr +1, LE->Len - LE->Cursor); | ||
| LE->Len--; | ||
| StrTrunc(LE->Line, LE->Len); | ||
| } | ||
| break; | ||
|
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||
| case TKEY_BACKSPACE: | ||
| if (LE->Cursor > 0) | ||
| { | ||
| LE->Cursor--; | ||
| ptr=LE->Line + LE->Cursor; | ||
| if (LE->Cursor < LE->Len) memmove(ptr, ptr +1, LE->Len - LE->Cursor); | ||
| LE->Len--; | ||
| StrTrunc(LE->Line, LE->Len); | ||
| } | ||
| break; | ||
|
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| case TKEY_ENTER: | ||
| if (LE->History) LE->History->Side=NULL; | ||
| return(LINE_EDIT_ENTER); | ||
| break; | ||
|
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||
| default: | ||
| if (LE->Cursor == LE->Len) LE->Line=AddCharToBuffer(LE->Line, LE->Cursor, Char); | ||
| else | ||
| { | ||
| Tempstr=CopyStrLen(Tempstr, LE->Line, LE->Cursor); | ||
| Tempstr=AddCharToBuffer(Tempstr, LE->Cursor, Char); | ||
| Tempstr=CatStr(Tempstr, LE->Line + LE->Cursor); | ||
| LE->Line=CopyStr(LE->Line, Tempstr); | ||
| } | ||
| LE->Cursor++; | ||
| LE->Len++; | ||
| break; | ||
| } | ||
|
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| Destroy(Tempstr); | ||
|
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| return(LE->Cursor); | ||
| } | ||
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| char *LineEditDone(char *RetStr, TLineEdit *LE) | ||
| { | ||
| RetStr=CopyStr(RetStr, LE->Line); | ||
| if (LE->Flags & LINE_EDIT_HISTORY) LineEditAddToHistory(LE, LE->Line); | ||
| LE->Line=CopyStr(LE->Line, ""); | ||
| LE->Len=0; | ||
| LE->Cursor=0; | ||
|
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||
| return(RetStr); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| #ifndef LIBUSEFUL_LINEEDIT_H | ||
| #define LIBUSEFUL_LINEEDIT_H | ||
|
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||
| /* | ||
| This module supplies a line-editor with a history. | ||
| Example code using this can be found in Terminal.h in 'TerminalReadText' or in examples/EditLine.c | ||
| The 'LineEditCreate' command can be passed the flags: | ||
| LINE_EDIT_HISTORY - provide an recallable history of entered lines | ||
| LINE_EDIT_NOMOVE - don't allow use of left/right to move back into the text | ||
| this is used for password entry text that is invisible and | ||
| thus we cannot allow the user to use full editing, as they | ||
| can become 'lost'. | ||
| The 'EditLineHandleChar' function does most of the work, it expects to receive | ||
| the following characters (defined in KeyCodes.h) | ||
| TKEY_LEFT - move cursor left within text | ||
| TKEY_RIGHT - move cursor right within text | ||
| TKEY_UP - if history mode is active, recall previous entry | ||
| TKEY_DOWN - if moving through history goto next entry | ||
| TKEY_HOME - move cursor to start of text | ||
| TKEY_END - move cursor to end of text | ||
| TKEY_BACKSPACE - backspace delete previous character | ||
| TKEY_ERASE - erase curr character | ||
| TKEY_ENTER - return/enter line | ||
| TKEY_ESCAPE - cancel line editing | ||
| The 'EditLineHandleChar' function returns the cursor position within the edited line, or if 'enter' is pressed it will return the value LINE_EDIT_ENTER, if 'escape' is pressed then it will return LINE_EDIT_CANCEL. | ||
| When LINE_EDIT_ENTER is called 'LineEditDone' should be used to collect the typed line, as it will reset the LineEdit for a new line to be typed in, and if history mode is active, it will add the typed line to the history. | ||
| */ | ||
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| #include "includes.h" | ||
| #include "List.h" | ||
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| #define LINE_EDIT_ENTER -1 | ||
| #define LINE_EDIT_CANCEL -2 | ||
|
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| #define LINE_EDIT_HISTORY 1 | ||
| #define LINE_EDIT_NOMOVE 2 | ||
|
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| typedef struct | ||
| { | ||
| char *Line; | ||
| int Flags; | ||
| int Len; | ||
| int MaxHistory; | ||
| int Cursor; | ||
| ListNode *History; | ||
| } TLineEdit; | ||
|
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|
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| #define LineEditSetMaxHistory(LE, Max) ((LE)->MaxHistory = (Max)) | ||
|
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| TLineEdit *LineEditCreate(int Flags); | ||
| void LineEditSetText(TLineEdit *LE, const char *Text); | ||
| void LineEditDestroy(TLineEdit *LE); | ||
| int LineEditHandleChar(TLineEdit *LE, int Char); | ||
| char *LineEditDone(char *RetStr, TLineEdit *LE); | ||
| void LineEditClearHistory(TLineEdit *LE); | ||
| void LineEditAddToHistory(TLineEdit *LE, const char *Text); | ||
|
|
||
| #endif |
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