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Text File | 1991-10-05 | 24.3 KB | 567 lines

tde, the Thomson-Davis Editor Version 1.2 10-5-91 Frank Davis Usage: At the command line type: tde [file name] For example: tde tde foo.bar tde c:\c60\tde\main.c If you don't enter a file name at the command line, tde will prompt you for a file name. If the file does not exist, tde starts out with an empty file with the file name you just entered. tde will handle files as large 475k. If you try to edit a file larger than 475k, only the first portion of the file is loaded into tde. Editor fields and information lines: Sample tde screen ┌─── File number - each window opened to same file has same number │ ┌─── Window letter │ │ │ │ ┌─── Dirty file indicater - asterisk │ │ │ ┌─── File name │ │ │ │ ┌──── Total number of lines in file │ │ │ │ │ ┌─── line:column ┌──────────────────────────────────────────────────────────────┐ │ The first line on the screen contains file information │ ├──────────────────────────────────────────────────────────────┤ │ │ │ │ │ File area │ │ │ │ │ │ │ ├──────────────────────────────────────────────────────────────┤ │ Editor modes and information │ └──────────────────────────────────────────────────────────────┘ Insert │ │ │ │ │ │ └─ Overwrite │ │ │ │ │ └──── Stream delete? │ │ │ │ └───── Ignore / Match search case? │ │ │ └───── Indent mode? │ │ └───── Available memory for editing files │ └───── Total number of windows, including hidden windows └───── Total number of open files Multiple keys: I use the following abbreviated key definitions throughout this file: ^ = Control # = Shift @ = Alt For example, ^F5 means press and hold the Control key and then press F5 while holding down the Control key. You will have two keys depressed together at the same time. The function assigned to that key combination will be executed as soon as the second key is pressed. You may release the keys in any order you choose. Cursor movement: 101 Keyboard overview Cursor keys Keypad keys ┌─────┬─────┬─────┐ ┌───────┬───────┬───────┬───────┐ │ Ins │Home │PgUp │ │NumLock│Grey / │Grey * │Grey - │ ├─────┼─────┼─────┤ ├───────┼───────┼───────┼───────┤ │ Del │ End │PgDn │ │ Home │ Up │ Pg Up │ Grey │ └─────┴─────┴─────┘ ├───────┼───────┼───────┤ + │ │ Left │Center │ Right │ │ ┌─────┐ ├───────┼───────┼───────┼───────┤ │ Up │ │ End │ Down │ Pg Dn │ Grey │ ┌─────┼─────┼─────┐ ├───────┴───────┼───────┤ │ │Left │Down │Right│ │ Ins │ Del │ Enter │ └─────┴─────┴─────┘ └───────────────┴───────┴───────┘ If you like using these grey With Num Lock off, cursor keys, these function you can probably guess most assignments are for you. of these function assignments. Grey cursor keys Keypad keys Up - move cursor up Home - toggle col 1 & beg of line Down - move cursor down ^Home - first line in window Left - move cursor left Pg Up - page up Right - move cursor right ^Pg Up - first screen in file ^Up - scroll screen up Center - move to center of window ^Down - scroll screen down ^Center - line to center of window ^Left - cursor to previous word End - last character in line ^Right - cursor to next word ^End - last line in window @Up - fixed cursor, text scroll up Pg Dn - page down @Down - fixed cursor, text scroll down ^Pg Dn - last screen in file @Left - horizontal page left Ins - toggle insert mode @Right - horizontal page right Del - delete character ^Del - toggle stream delete mode Grey - - scroll screen up Grey + - scroll screen down Note: The Alt+Cursor keys are not ^Grey - - fixed scroll screen up available on 83/84 key keyboards. ^Grey + - fixed scroll screen down Pressing the Alt + a number key on Enter - Insert line and move down the keypad generates a character code #Enter - 1st char in next line and not a cursor movement command. ^Enter - column 1 in next line Function Keys: I tried to use some logical order when I assigned functions to the function keys. I use a 101 keyboard most of the time, so it should be easy to see the logical function grouping with it. The function keys on a 101 keyboard are placed along the top of the keyboard. Functions are arranged as follows: Help File Find & Window Functions Search/Replace Commands F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F1 = Instantaneous Help File Functions F2 = Save file Saves all changes made to file. Existing file is overwritten by the new file. It does not prompt for a new file name - automatically assumes you want to overwrite the old file. There is no way to get back the contents of the original file if you use this function. F3 = Quit file Abandons any changes made in the file and closes or kicks the file out of the current window. If you are editing multiple files or have multiple windows, tde searches for any invisible files to display in the current window. If no invisible windows are found, tde combines windows. If this is the only file being edited, F3 quits tde. If you made any changes to the file, it asks you if you want to abandon them. You can create an invisible window when you load in a file over the current file. Nothing happens to the invisible file or window - you just can't see it. F4 = File (save and quit) This function is a combination of Save and Quit (F2 & F3 above). #F2 = Save as If you don't want to overwrite the original file but you want to save the contents of the current file, you can save the file under a different file name. This function prompts you for a file name to save the changes (you can press escape to abort). #F4 = Edit new file To bring another file into the editor, use this function. It loads the file into the current window and previous window becomes invisible. You can even load several copies of the same file. I like this because I often need to refer back to the original unchanged file. Each time you load a file, it is treated as a different file. Be careful when you have several copies of one file open (don't forget which version of the file you want to keep - if worse comes to worse you always quit). Find and Search/Replace ^F5 = Toggle search case Most of the time I don't care about matching the case of the search pattern. The default in tde is to ignore search case. If you want to consider the search case, press this key to toggle the case flag. The state of the flag is displayed, in English, in the lite bar at the bottom of the screen. You can toggle the case of the search flag at any time, even after you define the search pattern. #F5 = find forward To define the search pattern, use this function. It prompts you for the search pattern. The pattern is defined (even across files) until changed. If the pattern is not found, an information message is displayed at the bottom of the current window. You can abort by pressing the Escape key. #F6 = find backward Same as find forward except search backward in file. F5 = Repeat find forward Once the search pattern has been defined (Shift F5 or Shift F6), you can press this key at any time in any file to find the next occurrence of pattern. I decided to use two sets of functions to perform searches. Once I found a pattern, I might do some editing and then find the next occurrence. I hate to define the search pattern over and over or set the search direction over and over. This function does a wrap search - when it reaches the eof it starts over at the beginning of the file. F6 = Repeat find backward Like repeat find forward, you can press this key at anytime once the search pattern has been defined. #F7 = Search/Replace forward This function prompts you for the search pattern and the replacement text. If you want to match the search case, remember to toggle the search flag (which can be done at any time). You can either do prompt or no prompt replacing. Regardless of prompt or noprompt replacing, this function actually moves the cursor to the pattern and displays it on the screen and replaces the text. If you are using tde on a slow machine, you can see the search/replace taking place. I implemented the function this way because I just like to see what the search/replace function is doing. #F8 = Search/Replace backward Same as search/replace forward except backwards. Window Functions F9 = Split window Splits the screen at the current cursor location. The current file is displayed in multiple windows. Changes to a file are displayed in all windows opened to the same copy of that file. You can also see any marked blocks in the same copy of the file in different windows. There has to be at least 1 text line in any window, so the number of windows is limited by the display screen. Displaying one line in a file is not all that helpful but the ability to do so is there. #F9 = Resize window Sometimes there is a need to concentrate on the contents of one window. You can change the size of the current window by using this function. Use the up and down arrow keys to adjust the current window to desired size. When you reach the desired size, press either the ESC key or the Return key to make the change permanent (the message on the screen says press ESC but either Return or ESC will do). Changing the size of the top window is not allowed. ^F9 = Zoom window Makes the current window fill the whole screen. If the current window already fills the screen then nothing is done. All windows on the screen when the zoom command is executed are expanded to full size. Additionally, all windows except the current window become invisible. F10 = Next window If more than one window is displayed, you can press one key to move to the next open window. #F10 = Previous window Move to previous window - opposite of next window. ^F10 = Next Hidden Window Displays "hidden" or "invisible" windows in the same place as the current window. The current window then becomes invisible. Block Commands: Block operations can be done within or between files. If you mark a block in one file, just move the cursor to the desired location in the same or other file and do the block operation. Operations on line blocks that move text are carried out on the line immediately below the cursor. Operations on box blocks that move text begin at the column of the cursor. @B - Mark Box Block This key is used to mark both the beginning and ending corner of a box block. Press @B to mark the beginning line/column. Then, move the cursor to the ending line/column and press @B again to define the block. You can move the cursor around and press @B to adjust to size of the block as needed. @L - Mark Line Block This key is similar to the operation of the box block, but entire lines are marked. You can't mix line and box blocks. If a box block was previously defined and you press @L, the editor defaults to line blocks. If a line block was defined and you press @B, the editor still defaults to line blocks. @U - Unmark Block If you make a booboo when marking blocks, press @U to unmark the block and start over. After certain block operations, the block may remain marked - just press @U to unmark it. @G - Group Delete block Sorta self explanatory. This function deletes the text in the marked block and unmarks the block. @M - Move block Move the cursor to the desired location and press @M to move the marked block. In line mode, the text in the original block is deleted and then inserted at the line immediately below the cursor. In box mode, the original block is inserted into the text beginning at the column of the cursor and then the marked box block is deleted. After block moves, tde unmarks the block. Moving blocks within themselves is not allowed. @C - Copy block With line blocks, the block is copied to the line below the cursor. With box blocks, the block is copied beginning at the column of the cursor - everything to the right of the cursor is moved right to make room for the box block. Blocks may be copied within or between files. tde unmarks the block after the copy is complete. If you try to copy a line block within itself, the block copy starts at the first line immediately after the marked block. @K - Kopy block Same as copy block except block stays marked. @O - Overlay block You can only overlay box blocks. Move the cursor to the location to begin the overlay and press @O. The original block stays marked after the operation. @F - Fill box block Fills the marked box block with character. tde prompts you for the fill character. Press Escape key to abort the command. This function is useful for filling in a column of periods for tables and such. @P - Print block Prints the block to the PRN device. I haven't tried redirecting the PRN, but it should work. This function prompts for block or file printing. Press ESC to abort. Once the printing starts, press ESC to stop. The block remains marked after the block is printed. @W - Write block to file Writes the marked block to a file. tde prompts for the file name. If the file exist, it deletes all contents of the existing file and replaces it with the marked block. Press ESC to abort. Once the writing starts, there is no safe way to stop it. The block remains marked after the block is written to a file. @E - Block expand tabs Expands the tabs in the marked block, either line or box block, using the current tab setting. The default tab setting is 8. You can change the tab setting at any time by pressing @T. The block remains marked after the block is expanded. Other keys: Enter Insert a newline at the cursor. If the cursor is in the middle of a line, the line is split at the cursor. The cursor moves to the next line. Indentation is matched if the editor is in the Indent mode. #Enter Move the cursor down a line. The cursor is placed on the first non-blank character in the next line. No lines are added to the file. ^Enter Move the cursor down a line. The cursor is placed on column 1 in the next line. No lines are added to the file. Up (arrow) Move cursor up a line if this is not the first line in a file and do appropriate vertical scrolling. Down (arrow) Move cursor down a line if this is not the last line in a file and do appropriate vertical scrolling. Left (arrow) Move cursor left one column if this is not column 0 and do appropriate horizontal scrolling. Right (arrow) Move cursor right one column up to column 255 and do appropriate horizontal scrolling. Home Move cursor to first non-blank character in the current line else move to column zero. Scroll to left as needed. Press Home to toggle between the first non-blank character and column zero. End Move cursor to 1st column past the last character in the current line else move to column zero. Scroll to right as needed. Page Up Move cursor up one page if this is not first page in file. Page Down Move cursor down one page if this is not last page in file. ^Right Move cursor one word right. ^Left Move cursor one word left. ^Home Move cursor to first line on screen. ^End Move cursor to last line on screen. If end of file occurs before last line of file, move cursor to last line in file. ^Page Up Move cursor to first page in file. ^Page Down Move cursor to last page in file. @Z - zip to line Move to line number. tde prompts for line number. Press Escape to abort. Center The cursor is moved to the center of the current window. ^Center The line the cursor is on is moved to the center of the current window. ^Up Scroll window up 1 line with cursor staying on same line in file. ^Down Scroll window down 1 line with cursor staying on same line in file. Grey - on key pad Scroll window up 1 line with cursor staying on same line in file. Grey + on key pad Scroll window down 1 line with cursor staying on same line in file. @Grey Up (not the arrow on the keypad) or ^Grey - (grey - on keypad) Fixed scroll window up 1 line with cursor staying on same line on the screen as the file scrolls up. @Grey Down (not the arrow on the keypad) ^Grey + (grey + on keypad) Fixed scroll window down 1 line with cursor staying on same line on the screen as the file scrolls down. @Grey Left Horizontal page left. @Grey Right Horizontal page right. ESC - undo line Get back the original unchanged line. When cursor is moved off a line, all changes to the file are made and there is no way to get back the contents of a line. Del Delete the character, if any, under the cursor. ^Del Toggle the delete stream mode. In stream mode, pressing the Del key will delete the characters in the file as if they were a stream. Lines will be joined at the cursor and eventually every character in the file may be deleted. In line mode, only the characters on a line may be deleted. Backspace Delete the character to the left of the cursor and move left. If the cursor is on the first column of a line, the current line is joined with the line above. If in indent mode and the cursor is on the first non-blank character, tde matches the indentation of the previous line(s). Tab If in insert mode, insert the appropriate number of spaces for a tab and move the cursor left. If in overwrite mode, just move the cursor left w/o inserting text. Ins Toggle between insert and overwrite mode. In insert mode, the cursor is normal size and an "i" is displayed at bottom right of screen. In overwrite mode, the cursor is 3-4 times normal size and an "o" is displayed at bottom right of screen. @I Toggle between indent and no indent mode. In indent mode, tde searches for the first non-blank character on previous lines and places the cursor on that column when a carriage return is pressed. When backspacing in indent mode, tde lines up the indentation with the first non-blank character of the previous line(s). @= Duplicates the current line. Duplicating the last (NULL) line in a file is not allowed. The cursor stays on the current line and the duplicated line is inserted after the current line. @- Deletes the text from the cursor to the end of line. ^Y Deletes current line, cursor does not move. @D Deletes current line, cursor does not move (exactly same as ^Y). @Y or ^U Undelete the most recently deleted line. The undelete buffer has room for 12 lines. If more than 12 lines are deleted, the oldest line is pushed out and the new one is added. You may press @Y repeatedly to undelete all the lines in the buffer. Deleted lines from line delete, delete to end of line, word delete, join line, and backspace are stored in the undelete buffer. @A Add a blank line below cursor. @S Split line at column of cursor. If in indent mode, the split line is autoindented. @J Join the current line with the line below. The text from the cursor to the end of the current line is deleted and the first character of the line below becomes the new character under the cursor. @T Set tabs. tde prompts for new tab setting. The default is 8. ^] Paren Balance. This function is really nice for C programmers because it balances parenthesis, brackets, and braces. If the character under the cursor is a paren, bracket, or brace, tde searches either forward or backward through the file for the balancing opposite. The cursor is moved to the balancing opposite if found. WordStar type commands: A limited number of WordStar type commands are implemented in tde. I have no plans whatsoever to implement any additional WordStar type commands. This implementation may not correspond exactly to the WordStar command convention. WordStar is a trademark of WordStar International. ^A - word left ^B - backspace ^C - screen down ^D - character right ^E - line up ^F - word right ^G - delete character ^H - backspace ^I - tab ^J - help ^K - n/a ^L - n/a ^M - return (carriage control, enter) ^N - add line below cursor ^O - n/a ^P - n/a ^Q - n/a ^R - page up ^S - character left ^T - word delete ^U - undelete line ^V - toggle insert mode ^W - scroll up line ^X - line down ^Y - delete line ^Z - scroll line down ^\ - redraw screen