Topic
Gap buffer
About: Gap buffer is a research topic. Over the lifetime, 23 publications have been published within this topic receiving 296 citations.
Papers
Patent•
14 Oct 1993TL;DR: In this article, a text manipulation handle associated with the selected text block is displayed and a text block can be manipulated by the user by positioning a cursor within the manipulation handle and activating a signal generation device.
Abstract: A means and method for directly manipulating text on a computer display screen. A selected block of text is first identified for manipulation. After being identified, the selected block of text is highlighted on the display screen using contrasting colors or a reverse video. A text manipulation handle associated with the selected text block is displayed. The user may then directly manipulate the selected text block by positioning a cursor within the text manipulation handle and activating a signal generation device. When this occurs, the selected text block may be moved around the display screen while remaining visible using the cursor control device as long as the signal generation device remains active. A shadow image and insertion marker associated with the selected text block is displayed while the selected text block is moveable. A cutting or copying operation may be selected when the signal generation device is activated. The cutting operation removes the selected text block from the available text leaving a blank area at its original position. The copying operation retains the original selected text block in its previous position in the available text. When the signal generation device is deactivated, the selected text block is inserted or pasted into the available text at the position indicated by the insertion marker. The available text is then reformatted to achieve continuity in the lines of available text.
149 citations
Patent•
12 Feb 1996TL;DR: In this paper, a buffer is implemented in computer memory that never wraps data around from the buffer end to the buffer beginning unless the amount of data being transferred exceeds the entire size of the buffer.
Abstract: A buffer, implemented in computer memory, that never wraps data around from the buffer end to the buffer beginning unless the amount of data being transferred exceeds the entire size of the buffer. Eliminating wrapping improves performance by eliminating the need for the reading device to reconstruct a contiguous block of data from multiple reads. In addition, when possible, only the beginning portion of the buffer is used, thereby minimizing the occurrence of virtual memory page faults during buffer use and increasing the probability that pages near the end of the buffer will be freed for uninterrupted use by other processes. In addition to the usual read and write pointers, the buffer in the invention adds two variables, a buffer end pointer and a marker. When necessary, the buffer end pointer indicates the end of a block of data. The marker is used to limit the use of the buffer memory to a few pages at the beginning of the buffer when possible. If a block of data is written past the marker, the next block of data is written at the beginning of the buffer.
49 citations
Patent•
24 Nov 1989TL;DR: In this article, the cursor data is accessed from the non-displayed segment of the memory during horizontal blank time preceding the raster scan of the video pattern data subject to cursor overlay.
Abstract: An architecture for generating a hardware cursor in the context of a bit mapped video display system operable from a frame buffer with non-displayed but addressable memory space. A segment of the non-displayed memory is loaded with cursor outline and pattern information. The cursor data is accessed from the non-displayed segment of the memory during horizontal blank time preceding the raster scan of the video pattern data subject to cursor overlay. Thereby, the video pattern data in the frame buffer and cursor data are arranged by scan or row line. The column location of the cursor pattern is defined by the computer and stored in a position counter to be synchronously incremented by pixel during the scan of the frame buffer line. At the appropriate count the cursor data is logically combined with frame buffer pattern data to superimpose the cursor characteristics upon the video pattern data. The cursor data buffer can thereby be relatively small yet overlay a relatively large cursor with minimal manipulation by the computer controlling the video display.
22 citations
Patent•
IBM1
TL;DR: A text processing system includes a first external storage area for text documents, an internal text storage buffer where, inter alia, edit operations are performed, and a third storage area in which text is formatted for display as discussed by the authors.
Abstract: A text processing system includes a first external storage area for text documents, an internal text storage buffer where, inter alia, edit operations are performed, and a third storage area in which text is formatted for display. The area for formatting text for display is related to the internal text storage buffer by a table containing pointers to the text storage area, one for each line to be displayed. The pointers are expressed relative to a single known address, that of the start of the line in the text storage buffer containing the point at which the edit operation is to occur.
15 citations
Patent•
2 Dec 1986
TL;DR: In this article, a two-part cursor is used to guide the operator in creating and modifying strings of symbols in a computer storage apparatus, where one part indicates the exact location where a symbol will be inserted and a second part highlights a selected substring which is the object of certain commands.
Abstract: A system for creating and modifying strings of symbols in a computer storage apparatus includes a two-part cursor for guiding the operator. One cursor part indicates the exact location where entered symbols will be inserted. A second cursor part highlights a selected substring which is the object of certain commands, such as the delete command. Internally, the system provides memory management techniques for inserting and deleting symbols in response to operator commands. The display, including the two-part cursor, is derived from the memory contents with the aid of pointers, tables, and state variables.
10 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2012 | 1 |
| 2006 | 1 |
| 2005 | 2 |
| 2004 | 1 |
| 2000 | 1 |
| 1996 | 1 |