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Send 'sub-frames' rather than the whole DOM
Firstly, this improves performance on a larger pages. But it also prevents browser crashes a very large pages by setting a limit to how much work is done per frame. Also includes: * Thread safe cell map for simultaneously reading and writing to the buffered frame of TTY cells. * Improved webext tests so that they programmaticlly build DOM rects based off simple text strings.
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package browsh | ||
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import ( | ||
"sync" | ||
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"github.com/gdamore/tcell" | ||
) | ||
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// A cell represents an individual TTY cell. An entire representation of the browser | ||
// DOM is stored in a local in-memory "frame". The TTY can then quickly render a region | ||
// of this frame for fast scrolling. | ||
type cell struct { | ||
character []rune | ||
fgColour tcell.Color | ||
bgColour tcell.Color | ||
} | ||
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// Both updating a frame and scrolling a frame can happen at the same time, so we need | ||
// to use mutexes. | ||
type threadSafeCellsMap struct { | ||
sync.RWMutex | ||
internal map[int]cell | ||
} | ||
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func newCellsMap() *threadSafeCellsMap { | ||
return &threadSafeCellsMap{ | ||
internal: make(map[int]cell), | ||
} | ||
} | ||
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func (m *threadSafeCellsMap) load(key int) (value cell, ok bool) { | ||
m.RLock() | ||
result, ok := m.internal[key] | ||
m.RUnlock() | ||
return result, ok | ||
} | ||
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func (m *threadSafeCellsMap) store(key int, value cell) { | ||
m.Lock() | ||
m.internal[key] = value | ||
m.Unlock() | ||
} |
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