mirror of
https://github.com/koreader/koreader
synced 2024-11-13 19:11:25 +00:00
b523c2e8b9
Get rid of the doc & seqtext fields, as they are not actually used (nor are they particularly useful, the event handler's name should be pretty self-explanatory). Also, tweak the key_events documentation to highlight the quirks of the API, especially as far as array nesting is involved... Random drive-by cleanup of the declarations of key_events & ges_events to re-use the existing instance object (now that we know they're sane ;p) for tables with a single member (less GC pressure).
371 lines
13 KiB
Lua
371 lines
13 KiB
Lua
--[[--
|
|
BBoxWidget shows a bbox for page cropping.
|
|
]]
|
|
|
|
local InputContainer = require("ui/widget/container/inputcontainer")
|
|
local Device = require("device")
|
|
local Event = require("ui/event")
|
|
local Geom = require("ui/geometry")
|
|
local GestureRange = require("ui/gesturerange")
|
|
local Math = require("optmath")
|
|
local Screen = Device.screen
|
|
local Size = require("ui/size")
|
|
local UIManager = require("ui/uimanager")
|
|
|
|
local BBoxWidget = InputContainer:extend{
|
|
page_bbox = nil,
|
|
screen_bbox = nil,
|
|
linesize = Size.line.thick,
|
|
fine_factor = 10,
|
|
dimen = Geom:new(),
|
|
}
|
|
|
|
function BBoxWidget:init()
|
|
self.page_bbox = self.document:getPageBBox(self.view.state.page)
|
|
if Device:isTouchDevice() then
|
|
self.ges_events = {
|
|
TapAdjust = {
|
|
GestureRange:new{
|
|
ges = "tap",
|
|
range = self.view.dimen,
|
|
}
|
|
},
|
|
SwipeAdjust = {
|
|
GestureRange:new{
|
|
ges = "swipe",
|
|
range = self.view.dimen,
|
|
}
|
|
},
|
|
HoldAdjust = {
|
|
GestureRange:new{
|
|
ges = "hold",
|
|
range = self.view.dimen,
|
|
}
|
|
},
|
|
ConfirmAdjust = {
|
|
GestureRange:new{
|
|
ges = "double_tap",
|
|
range = self.view.dimen,
|
|
}
|
|
}
|
|
}
|
|
else
|
|
self._confirm_stage = 1 -- 1 for left-top, 2 for right-bottom
|
|
self.key_events.MoveIndicatorUp = { { "Up" }, event="MoveIndicator", args = { 0, -1 } }
|
|
self.key_events.MoveIndicatorDown = { { "Down" }, event="MoveIndicator", args = { 0, 1 } }
|
|
self.key_events.MoveIndicatorLeft = { { "Left" }, event="MoveIndicator", args = { -1, 0 } }
|
|
self.key_events.MoveIndicatorRight = { { "Right" }, event="MoveIndicator", args = { 1, 0 } }
|
|
end
|
|
if Device:hasKeys() then
|
|
self.key_events.Close = { { Device.input.group.Back } }
|
|
self.key_events.Select = { { "Press" } }
|
|
end
|
|
end
|
|
|
|
function BBoxWidget:getSize()
|
|
return self.view.dimen
|
|
end
|
|
|
|
function BBoxWidget:paintTo(bb, x, y)
|
|
self.dimen = self.view.dimen:copy()
|
|
self.dimen.x, self.dimen.y = x, y
|
|
|
|
-- As getScreenBBox uses view states, screen_bbox initialization is postponed.
|
|
self.screen_bbox = self.screen_bbox or self:getScreenBBox(self.page_bbox)
|
|
local bbox = self.screen_bbox
|
|
-- top edge
|
|
bb:invertRect(bbox.x0 + self.linesize, bbox.y0, bbox.x1 - bbox.x0, self.linesize)
|
|
-- bottom edge
|
|
bb:invertRect(bbox.x0 + self.linesize, bbox.y1, bbox.x1 - bbox.x0 - self.linesize, self.linesize)
|
|
-- left edge
|
|
bb:invertRect(bbox.x0, bbox.y0, self.linesize, bbox.y1 - bbox.y0 + self.linesize)
|
|
-- right edge
|
|
bb:invertRect(bbox.x1, bbox.y0 + self.linesize, self.linesize, bbox.y1 - bbox.y0)
|
|
if self._confirm_stage == 1 then
|
|
-- left top indicator
|
|
self:_drawIndicator(bb, bbox.x0, bbox.y0)
|
|
elseif self._confirm_stage == 2 then
|
|
-- right bottom indicator
|
|
self:_drawIndicator(bb, bbox.x1, bbox.y1)
|
|
end
|
|
end
|
|
|
|
function BBoxWidget:_drawIndicator(bb, x, y)
|
|
local rect = Geom:new({
|
|
x = x - Size.item.height_default / 2,
|
|
y = y - Size.item.height_default / 2,
|
|
w = Size.item.height_default,
|
|
h = Size.item.height_default,
|
|
})
|
|
-- paint big cross line +
|
|
bb:invertRect(
|
|
rect.x,
|
|
rect.y + rect.h / 2 - Size.border.thick / 2,
|
|
rect.w,
|
|
Size.border.thick
|
|
)
|
|
bb:invertRect(
|
|
rect.x + rect.w / 2 - Size.border.thick / 2,
|
|
rect.y,
|
|
Size.border.thick,
|
|
rect.h
|
|
)
|
|
end
|
|
|
|
-- transform page bbox to screen bbox
|
|
function BBoxWidget:getScreenBBox(page_bbox)
|
|
local bbox = {}
|
|
local scale = self.view.state.zoom
|
|
local screen_offset = self.view.state.offset
|
|
bbox.x0 = Math.round(page_bbox.x0 * scale + screen_offset.x)
|
|
bbox.y0 = Math.round(page_bbox.y0 * scale + screen_offset.y)
|
|
bbox.x1 = Math.round(page_bbox.x1 * scale + screen_offset.x)
|
|
bbox.y1 = Math.round(page_bbox.y1 * scale + screen_offset.y)
|
|
return bbox
|
|
end
|
|
|
|
-- transform screen bbox to page bbox
|
|
function BBoxWidget:getPageBBox(screen_bbox)
|
|
local bbox = {}
|
|
local scale = self.view.state.zoom
|
|
local screen_offset = self.view.state.offset
|
|
bbox.x0 = Math.round((screen_bbox.x0 - screen_offset.x) / scale)
|
|
bbox.y0 = Math.round((screen_bbox.y0 - screen_offset.y) / scale)
|
|
bbox.x1 = Math.round((screen_bbox.x1 - screen_offset.x) / scale)
|
|
bbox.y1 = Math.round((screen_bbox.y1 - screen_offset.y) / scale)
|
|
return bbox
|
|
end
|
|
|
|
function BBoxWidget:inPageArea(ges)
|
|
local offset = self.view.state.offset
|
|
local page_area = self.view.page_area
|
|
local page_dimen = Geom:new{ x = offset.x, y = offset.y, h = page_area.h, w = page_area.w}
|
|
return not ges.pos:notIntersectWith(page_dimen)
|
|
end
|
|
|
|
function BBoxWidget:adjustScreenBBox(ges, relative)
|
|
if not self:inPageArea(ges) then return end
|
|
local bbox = self.screen_bbox
|
|
local upper_left = Geom:new{ x = bbox.x0, y = bbox.y0}
|
|
local upper_right = Geom:new{ x = bbox.x1, y = bbox.y0}
|
|
local bottom_left = Geom:new{ x = bbox.x0, y = bbox.y1}
|
|
local bottom_right = Geom:new{ x = bbox.x1, y = bbox.y1}
|
|
local upper_center = Geom:new{ x = (bbox.x0 + bbox.x1) / 2, y = bbox.y0}
|
|
local bottom_center = Geom:new{ x = (bbox.x0 + bbox.x1) / 2, y = bbox.y1}
|
|
local right_center = Geom:new{ x = bbox.x1, y = (bbox.y0 + bbox.y1) / 2}
|
|
local left_center = Geom:new{ x = bbox.x0, y = (bbox.y0 + bbox.y1) / 2}
|
|
local anchors = {
|
|
upper_left, upper_center, upper_right,
|
|
left_center, right_center,
|
|
bottom_left, bottom_center, bottom_right,
|
|
}
|
|
local _, nearest = Math.tmin(anchors, function(a,b)
|
|
return a:distance(ges.pos) > b:distance(ges.pos)
|
|
end)
|
|
if nearest == upper_left then
|
|
upper_left.x = ges.pos.x
|
|
upper_left.y = ges.pos.y
|
|
elseif nearest == bottom_right then
|
|
bottom_right.x = ges.pos.x
|
|
bottom_right.y = ges.pos.y
|
|
elseif nearest == upper_right then
|
|
bottom_right.x = ges.pos.x
|
|
upper_left.y = ges.pos.y
|
|
elseif nearest == bottom_left then
|
|
upper_left.x = ges.pos.x
|
|
bottom_right.y = ges.pos.y
|
|
elseif nearest == upper_center then
|
|
if relative then
|
|
local delta = 0
|
|
if ges.direction == "north" then
|
|
delta = -ges.distance / self.fine_factor
|
|
elseif ges.direction == "south" then
|
|
delta = ges.distance / self.fine_factor
|
|
end
|
|
upper_left.y = upper_left.y + delta
|
|
else
|
|
upper_left.y = ges.pos.y
|
|
end
|
|
elseif nearest == right_center then
|
|
if relative then
|
|
local delta = 0
|
|
if ges.direction == "west" then
|
|
delta = -ges.distance / self.fine_factor
|
|
elseif ges.direction == "east" then
|
|
delta = ges.distance / self.fine_factor
|
|
end
|
|
bottom_right.x = bottom_right.x + delta
|
|
else
|
|
bottom_right.x = ges.pos.x
|
|
end
|
|
elseif nearest == bottom_center then
|
|
if relative then
|
|
local delta = 0
|
|
if ges.direction == "north" then
|
|
delta = -ges.distance / self.fine_factor
|
|
elseif ges.direction == "south" then
|
|
delta = ges.distance / self.fine_factor
|
|
end
|
|
bottom_right.y = bottom_right.y + delta
|
|
else
|
|
bottom_right.y = ges.pos.y
|
|
end
|
|
elseif nearest == left_center then
|
|
if relative then
|
|
local delta = 0
|
|
if ges.direction == "west" then
|
|
delta = -ges.distance / self.fine_factor
|
|
elseif ges.direction == "east" then
|
|
delta = ges.distance / self.fine_factor
|
|
end
|
|
upper_left.x = upper_left.x + delta
|
|
else
|
|
upper_left.x = ges.pos.x
|
|
end
|
|
end
|
|
self.screen_bbox = {
|
|
x0 = Math.round(upper_left.x),
|
|
y0 = Math.round(upper_left.y),
|
|
x1 = Math.round(bottom_right.x),
|
|
y1 = Math.round(bottom_right.y)
|
|
}
|
|
|
|
UIManager:setDirty(self.ui, "ui")
|
|
end
|
|
|
|
function BBoxWidget:onMoveIndicator(args)
|
|
local dx, dy = unpack(args)
|
|
local bbox = self.screen_bbox
|
|
local move_distance = Size.item.height_default / 4
|
|
local half_indicator_size = move_distance * 2
|
|
-- mark edges dirty to redraw
|
|
-- top edge
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x0 - move_distance,
|
|
y = bbox.y0 - move_distance,
|
|
w = bbox.x1 - bbox.x0 + move_distance,
|
|
h = move_distance * 2
|
|
})
|
|
-- left edge
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x0 - move_distance,
|
|
y = bbox.y0 - move_distance,
|
|
w = move_distance * 2,
|
|
h = bbox.y1 - bbox.y0 + move_distance,
|
|
})
|
|
-- right edge
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x1 - move_distance,
|
|
y = bbox.y0 - move_distance,
|
|
w = move_distance * 2,
|
|
h = bbox.y1 - bbox.y0 + move_distance,
|
|
})
|
|
-- bottom edge
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x0 - move_distance,
|
|
y = bbox.y1 - move_distance,
|
|
w = bbox.x1 - bbox.x0 + move_distance,
|
|
h = move_distance * 2,
|
|
})
|
|
-- left top indicator
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x0 - half_indicator_size - move_distance,
|
|
y = bbox.y0 - half_indicator_size - move_distance,
|
|
w = half_indicator_size * 2 + move_distance,
|
|
h = half_indicator_size * 2 + move_distance
|
|
})
|
|
-- bottom right indicator
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x1 - half_indicator_size,
|
|
y = bbox.y1 - half_indicator_size,
|
|
w = half_indicator_size * 2 + move_distance,
|
|
h = half_indicator_size * 2 + move_distance
|
|
})
|
|
if self._confirm_stage == 1 then
|
|
local x = self.screen_bbox.x0 + dx * Size.item.height_default / 4
|
|
local y = self.screen_bbox.y0 + dy * Size.item.height_default / 4
|
|
local max_x = self.screen_bbox.x1 - Size.item.height_default
|
|
local max_y = self.screen_bbox.y1 - Size.item.height_default
|
|
x = (x > 0 and x) or 0
|
|
x = (x < max_x and x) or max_x
|
|
y = (y > 0 and y) or 0
|
|
y = (y < max_y and y) or max_y
|
|
self.screen_bbox.x0 = Math.round(x)
|
|
self.screen_bbox.y0 = Math.round(y)
|
|
return true
|
|
elseif self._confirm_stage == 2 then
|
|
local x = self.screen_bbox.x1 + dx * Size.item.height_default / 4
|
|
local y = self.screen_bbox.y1 + dy * Size.item.height_default / 4
|
|
local min_x = self.screen_bbox.x0 + Size.item.height_default
|
|
local min_y = self.screen_bbox.y0 + Size.item.height_default
|
|
x = (x > min_x and x) or min_x
|
|
x = (x < Screen:getWidth() and x) or Screen:getWidth()
|
|
y = (y > min_y and y) or min_y
|
|
y = (y < Screen:getHeight() and y) or Screen:getHeight()
|
|
self.screen_bbox.x1 = Math.round(x)
|
|
self.screen_bbox.y1 = Math.round(y)
|
|
return true
|
|
end
|
|
end
|
|
|
|
function BBoxWidget:getModifiedPageBBox()
|
|
return self:getPageBBox(self.screen_bbox)
|
|
end
|
|
|
|
function BBoxWidget:onTapAdjust(arg, ges)
|
|
self:adjustScreenBBox(ges)
|
|
return true
|
|
end
|
|
|
|
function BBoxWidget:onSwipeAdjust(arg, ges)
|
|
self:adjustScreenBBox(ges, true)
|
|
return true
|
|
end
|
|
|
|
function BBoxWidget:onHoldAdjust(arg, ges)
|
|
--- @fixme this is a dirty hack to disable hold gesture in page cropping
|
|
-- since Kobo devices may append hold gestures to each swipe gesture rendering
|
|
-- relative replacement impossible. See koreader/koreader#987 at Github.
|
|
--self:adjustScreenBBox(ges)
|
|
return true
|
|
end
|
|
|
|
function BBoxWidget:onConfirmAdjust(arg, ges)
|
|
if self:inPageArea(ges) then
|
|
self.ui:handleEvent(Event:new("ConfirmPageCrop"))
|
|
end
|
|
return true
|
|
end
|
|
|
|
function BBoxWidget:onClose()
|
|
self.ui:handleEvent(Event:new("CancelPageCrop"))
|
|
return true
|
|
end
|
|
|
|
function BBoxWidget:onSelect()
|
|
if not self._confirm_stage or self._confirm_stage == 2 then
|
|
self.ui:handleEvent(Event:new("ConfirmPageCrop"))
|
|
else
|
|
local bbox = self.screen_bbox
|
|
self._confirm_stage = self._confirm_stage + 1
|
|
-- left top indicator
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x0 - Size.item.height_default / 2,
|
|
y = bbox.y0 - Size.item.height_default / 2,
|
|
w = Size.item.height_default,
|
|
h = Size.item.height_default,
|
|
})
|
|
-- right bottom indicator
|
|
UIManager:setDirty(self.ui, "ui", Geom:new{
|
|
x = bbox.x1 - Size.item.height_default / 2,
|
|
y = bbox.y1 - Size.item.height_default / 2,
|
|
w = Size.item.height_default,
|
|
h = Size.item.height_default,
|
|
})
|
|
end
|
|
return true
|
|
end
|
|
|
|
|
|
return BBoxWidget
|