mirror of
https://github.com/kasmtech/KasmVNC.git
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c211f31113
It served no meaningful purpose and it had bugs. So let's remove it rather than try to fix it.
121 lines
5.4 KiB
Markdown
121 lines
5.4 KiB
Markdown
# 1. Internal Modules
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The noVNC client is composed of several internal modules that handle
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rendering, input, networking, etc. Each of the modules is designed to
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be cross-browser and independent from each other.
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Note however that the API of these modules is not guaranteed to be
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stable, and this documentation is not maintained as well as the
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official external API.
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## 1.1 Module List
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* __Mouse__ (core/input/mouse.js): Mouse input event handler with
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limited touch support.
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* __Keyboard__ (core/input/keyboard.js): Keyboard input event handler with
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non-US keyboard support. Translates keyDown and keyUp events to X11
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keysym values.
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* __Display__ (core/display.js): Efficient 2D rendering abstraction
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layered on the HTML5 canvas element.
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* __Websock__ (core/websock.js): Websock client from websockify
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with transparent binary data support.
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[Websock API](https://github.com/novnc/websockify-js/wiki/websock.js) wiki page.
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## 1.2 Callbacks
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For the Mouse, Keyboard and Display objects the callback functions are
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assigned to configuration attributes, just as for the RFB object. The
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WebSock module has a method named 'on' that takes two parameters: the
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callback event name, and the callback function.
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## 2. Modules
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## 2.1 Mouse Module
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### 2.1.1 Configuration Attributes
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| name | type | mode | default | description
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| ----------- | ---- | ---- | -------- | ------------
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| touchButton | int | RW | 1 | Button mask (1, 2, 4) for which click to send on touch devices. 0 means ignore clicks.
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### 2.1.2 Methods
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| name | parameters | description
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| ------ | ---------- | ------------
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| grab | () | Begin capturing mouse events
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| ungrab | () | Stop capturing mouse events
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### 2.1.2 Callbacks
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| name | parameters | description
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| ------------- | ------------------- | ------------
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| onmousebutton | (x, y, down, bmask) | Handler for mouse button click/release
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| onmousemove | (x, y) | Handler for mouse movement
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## 2.2 Keyboard Module
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### 2.2.1 Configuration Attributes
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None
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### 2.2.2 Methods
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| name | parameters | description
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| ------ | ---------- | ------------
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| grab | () | Begin capturing keyboard events
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| ungrab | () | Stop capturing keyboard events
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### 2.2.3 Callbacks
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| name | parameters | description
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| ---------- | -------------------- | ------------
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| onkeypress | (keysym, code, down) | Handler for key press/release
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## 2.3 Display Module
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### 2.3.1 Configuration Attributes
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| name | type | mode | default | description
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| ------------ | ----- | ---- | ------- | ------------
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| scale | float | RW | 1.0 | Display area scale factor 0.0 - 1.0
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| clipViewport | bool | RW | false | Use viewport clipping
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| width | int | RO | | Display area width
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| height | int | RO | | Display area height
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### 2.3.2 Methods
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| name | parameters | description
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| ------------------ | ------------------------------------------------------- | ------------
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| viewportChangePos | (deltaX, deltaY) | Move the viewport relative to the current location
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| viewportChangeSize | (width, height) | Change size of the viewport
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| absX | (x) | Return X relative to the remote display
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| absY | (y) | Return Y relative to the remote display
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| resize | (width, height) | Set width and height
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| flip | (from_queue) | Update the visible canvas with the contents of the rendering canvas
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| pending | () | Check if there are waiting items in the render queue
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| flush | () | Resume processing the render queue unless it's empty
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| fillRect | (x, y, width, height, color, from_queue) | Draw a filled in rectangle
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| copyImage | (old_x, old_y, new_x, new_y, width, height, from_queue) | Copy a rectangular area
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| imageRect | (x, y, mime, arr) | Draw a rectangle with an image
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| startTile | (x, y, width, height, color) | Begin updating a tile
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| subTile | (tile, x, y, w, h, color) | Update a sub-rectangle within the given tile
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| finishTile | () | Draw the current tile to the display
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| blitImage | (x, y, width, height, arr, offset, from_queue) | Blit pixels (of R,G,B,A) to the display
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| blitRgbImage | (x, y, width, height, arr, offset, from_queue) | Blit RGB encoded image to display
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| blitRgbxImage | (x, y, width, height, arr, offset, from_queue) | Blit RGBX encoded image to display
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| drawImage | (img, x, y) | Draw image and track damage
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| autoscale | (containerWidth, containerHeight) | Scale the display
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### 2.3.3 Callbacks
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| name | parameters | description
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| ------- | ---------- | ------------
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| onflush | () | A display flush has been requested and we are now ready to resume FBU processing
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