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Merge pull request #104 from houqp/master

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API changes in highlighting code
This commit is contained in:
Dobrica Pavlinušić
2012-04-12 01:45:57 -07:00
parent face8b44c0 3438d6749d
commit e89750b379
3 changed files with 245 additions and 141 deletions
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50
djvureader.lua
View File

@@ -24,24 +24,52 @@ function DJVUReader:adjustDjvuReaderCommand()
end
-----------[ highlight support ]----------
----------------------------------------------------
-- highlight support
----------------------------------------------------
function DJVUReader:getText(pageno)
return self.doc:getPageText(pageno)
end
----------------------------------------------------
-- Given coordinates of four conners and return
-- coordinate of upper left conner with with and height
--
-- In djvulibre library, some coordinates starts from
-- down left conner, i.e. y is upside down. This method
-- only transform these coordinates.
-- lower left conner, i.e. y is upside down in kpv's
-- coordinate. So y0 should be taken with special care.
----------------------------------------------------
function DJVUReader:rectCoordTransform(x0, y0, x1, y1)
function DJVUReader:zoomedRectCoordTransform(x0, y0, x1, y1)
return
self.offset_x + x0 * self.globalzoom,
self.offset_y + self.cur_full_height - (y1 * self.globalzoom),
x0 * self.globalzoom,
self.cur_full_height - (y1 * self.globalzoom),
(x1 - x0) * self.globalzoom,
(y1 - y0) * self.globalzoom
end
function DJVUReader:getText(pageno)
return self.doc:getPageText(pageno)
-- y axel in djvulibre starts from bottom
function DJVUReader:_isEntireWordInScreenHeightRange(w)
return (w ~= nil) and
(self.cur_full_height - (w.y1 * self.globalzoom) >=
-self.offset_y) and
(self.cur_full_height - (w.y0 * self.globalzoom) <=
-self.offset_y + G_height)
end
-- y axel in djvulibre starts from bottom
function DJVUReader:_isEntireLineInScreenHeightRange(l)
return (l ~= nil) and
(self.cur_full_height - (l.y1 * self.globalzoom) >=
-self.offset_y) and
(self.cur_full_height - (l.y0 * self.globalzoom) <=
-self.offset_y + G_height)
end
-- y axel in djvulibre starts from bottom
function DJVUReader:_isWordInScreenRange(w)
return (w ~= nil) and
(self.cur_full_height - (w.y0 * self.globalzoom) >= -self.offset_y
or self.cur_full_height - (w.y1 * self.globalzoom) <= -self.offset_y + G_height)
and
(w.x1 * self.globalzoom >= -self.offset_x
or w.x0 * self.globalzoom <= -self.offset_x + G_width)
end

13
pdfreader.lua
View File

@@ -31,16 +31,9 @@ function PDFReader:open(filename)
return true
end
-----------[ highlight support ]----------
function PDFReader:rectCoordTransform(x0, y0, x1, y1)
return
x0 * self.globalzoom,
y1 * self.globalzoom - self.offset_y,
x1 - x0,
y1 - y0
end
----------------------------------------------------
-- highlight support
----------------------------------------------------
function PDFReader:getText(pageno)
local ok, page = pcall(self.doc.openPage, self.doc, pageno)
if not ok then

323
unireader.lua
View File

@@ -112,33 +112,60 @@ function UniReader:init()
self:addAllCommands()
end
-----------[ highlight support ]----------
----------------------------------------------------
-- highlight support
----------------------------------------------------
----------------------------------------------------
-- Given coordinates of four conners and return
-- coordinate of upper left conner with with and height
-- Given coordinates of four corners in original page
-- size and return coordinate of upper left conner in
-- zoomed page size with width and height.
----------------------------------------------------
function UniReader:rectCoordTransform(x0, y0, x1, y1)
function UniReader:zoomedRectCoordTransform(x0, y0, x1, y1)
return
x0 * self.globalzoom,
y1 * self.globalzoom - self.offset_y,
y0 * self.globalzoom,
(x1 - x0) * self.globalzoom,
(y1 - y0) * self.globalzoom
end
-- make sure the whole word can be seen in screen
----------------------------------------------------
-- Given coordinates of four corners in original page
-- size and return rectangular area in screen. You
-- might want to call this when you want to draw stuff
-- on screen.
--
-- NOTE: this method does not check whether given area
-- is can be shown in current screen. Make sure to check
-- with _isEntireWordInScreenRange() before you want to
-- draw on the returned area.
----------------------------------------------------
function UniReader:getRectInScreen(x0, y0, x1, y1)
x, y, w, h = self:zoomedRectCoordTransform(x0, y0, x1, y1)
return
x + self.offset_x,
y + self.offset_y,
w, h
end
-- make sure the whole word/line can be seen in screen
-- @TODO when not in FIT_TO_CONTENT_WIDTH mode,
-- self.offset_{x,y} might be negative. 12.04 2012 (houqp)
function UniReader:_isEntireLineInScreenHeightRange(l)
return (l ~= nil) and
(l.y0 * self.globalzoom) >= -self.offset_y
and (l.y1 * self.globalzoom) <= -self.offset_y + G_height
end
function UniReader:_isEntireWordInScreenRange(w)
return self:_isEntireWordInScreenHeightRange(w) and
self:_isEntireWordInScreenWidthRange(w)
end
-- y axel in djvulibre starts from bottom
function UniReader:_isEntireWordInScreenHeightRange(w)
return (w ~= nil) and
(self.cur_full_height - (w.y1 * self.globalzoom) >=
-self.offset_y) and
(self.cur_full_height - (w.y0 * self.globalzoom) <=
-self.offset_y + G_height)
(w.y0 * self.globalzoom) >= -self.offset_y
and (w.y1 * self.globalzoom) <= -self.offset_y + G_height
end
function UniReader:_isEntireWordInScreenWidthRange(w)
@@ -150,12 +177,11 @@ end
-- make sure at least part of the word can be seen in screen
function UniReader:_isWordInScreenRange(w)
return (w ~= nil) and
(self.cur_full_height - (w.y0 * self.globalzoom) >=
-self.offset_y) and
(self.cur_full_height - (w.y1 * self.globalzoom) <=
-self.offset_y + G_height) and
(w.x1 * self.globalzoom >= -self.offset_x) and
(w.x0 * self.globalzoom <= -self.offset_x + G_width)
((w.y1 * self.globalzoom) >= -self.offset_y
or w.y0 * self.globalzoom <= -self.offset_y + G_height)
and
(w.x1 * self.globalzoom >= -self.offset_x
or w.x0 * self.globalzoom <= -self.offset_x + G_width)
end
function UniReader:toggleTextHighLight(word_list)
@@ -163,7 +189,7 @@ function UniReader:toggleTextHighLight(word_list)
for _,line_item in ipairs(text_item) do
-- make sure that line is in screen range
if self:_isEntireWordInScreenHeightRange(line_item) then
local x, y, w, h = self:rectCoordTransform(
local x, y, w, h = self:getRectInScreen(
line_item.x0, line_item.y0,
line_item.x1, line_item.y1)
-- slightly enlarge the highlight height
@@ -183,9 +209,9 @@ function UniReader:toggleTextHighLight(word_list)
elseif self.highlight.drawer == "marker" then
fb.bb:invertRect(x, y, w, h)
end
end -- EOF if isEntireWordInScreenHeightRange
end -- EOF for line_item
end -- EOF for text_item
end -- if isEntireWordInScreenHeightRange
end -- for line_item
end -- for text_item
end
function UniReader:_wordIterFromRange(t, l0, w0, l1, w1)
@@ -213,11 +239,11 @@ function UniReader:_wordIterFromRange(t, l0, w0, l1, w1)
end
return i, j
end
end -- EOF closure
end -- closure
end
function UniReader:_toggleWordHighLight(t, l, w)
x, y, w, h = self:rectCoordTransform(t[l][w].x0, t[l].y0,
x, y, w, h = self:getRectInScreen(t[l][w].x0, t[l].y0,
t[l][w].x1, t[l].y1)
-- slightly enlarge the highlight range for better viewing experience
x = x - w * 0.05
@@ -248,16 +274,20 @@ end
-- remember to clear cursor before calling this
function UniReader:drawCursorAfterWord(t, l, w)
local _, _, _, h = self:rectCoordTransform(0, t[l].y0, 0, t[l].y1)
local x, y, wd, h = self:rectCoordTransform(t[l][w].x0, t[l][w].y0, t[l][w].x1, t[l][w].y1)
-- get height of line t[l][w] is in
local _, _, _, h = self:zoomedRectCoordTransform(0, t[l].y0, 0, t[l].y1)
-- get rect of t[l][w]
local x, y, wd, _ = self:getRectInScreen(t[l][w].x0, t[l][w].y0, t[l][w].x1, t[l][w].y1)
self.cursor:setHeight(h)
self.cursor:moveTo(x+wd, y)
self.cursor:draw()
end
function UniReader:drawCursorBeforeWord(t, l, w)
local _, _, _, h = self:rectCoordTransform(0, t[l].y0, 0, t[l].y1)
local x, y, _, h = self:rectCoordTransform(t[l][w].x0, t[l][w].y0, t[l][w].x1, t[l][w].y1)
-- get height of line t[l][w] is in
local _, _, _, h = self:zoomedRectCoordTransform(0, t[l].y0, 0, t[l].y1)
-- get rect of t[l][w]
local x, y, _, _ = self:getRectInScreen(t[l][w].x0, t[l][w].y0, t[l][w].x1, t[l][w].y1)
self.cursor:setHeight(h)
self.cursor:moveTo(x, y)
self.cursor:draw()
@@ -284,6 +314,13 @@ function UniReader:startHighLightMode()
return nil
end
local function _isMovingForward(l, w)
return l.cur > l.start or (l.cur == l.start and w.cur > w.start)
end
---------------------------------------
-- some word handling help functions
---------------------------------------
local function _prevWord(t, cur_l, cur_w)
if cur_l == 1 then
if cur_w == 1 then
@@ -340,10 +377,88 @@ function UniReader:startHighLightMode()
end
end
local function _isMovingForward(l, w)
return l.cur > l.start or (l.cur == l.start and w.cur > w.start)
---------------------------------------
-- some gap handling help functions
---------------------------------------
local function _nextGap(t, cur_l, cur_w)
local is_meet_end = false
-- handle left end of line as special case.
if cur_w == 0 then
if cur_l == #t and #t[cur_l] == 1 then
is_meet_end = true
end
return cur_l, 1, is_meet_end
end
cur_l, cur_w = _nextWord(t, cur_l, cur_w)
if cur_w == 1 then
cur_w = 0
end
if cur_w ~= 0 and cur_l == #t and cur_w == #t[cur_l] then
is_meet_end = true
end
return cur_l, cur_w, is_meet_end
end
local function _prevGap(t, cur_l, cur_w)
local is_meet_start = false
-- handle left end of line as special case.
if cur_l == 1 and (cur_w == 1 or cur_w == 0) then -- in the first line
is_meet_start = true
return cur_l, 0, is_meet_start
end
if cur_w == 1 then -- not in the first line
return cur_l, 0, is_meet_start
elseif cur_w == 0 then
-- set to 1 so _prevWord() can find previous word in previous line
cur_w = 1
end
cur_l, cur_w = _prevWord(t, cur_l, cur_w)
return cur_l, cur_w, is_meet_end
end
local function _gapInNextLine(t, cur_l, cur_w)
local is_meet_end = false
if cur_l == #t then
-- already in last line
cur_w = #t[cur_l]
is_meet_end = true
else
-- handle left end of line as special case.
if cur_w == 0 then
cur_l = math.min(cur_l + 1, #t)
else
cur_l, cur_w = _wordInNextLine(t, cur_l, cur_w)
end
end
return cur_l, cur_w, is_meet_end
end
local function _gapInPrevLine(t, cur_l, cur_w)
local is_meet_start = false
if cur_l == 1 then
-- already in first line
is_meet_start = true
cur_w = 0
else
if cur_w == 0 then
-- goto left end of previous line
cur_l = math.max(cur_l - 1, 1)
else
cur_l, cur_w = _wordInPrevLine(t, cur_l, cur_w)
end
end
return cur_l, cur_w, is_meet_start
end
local l = {}
local w = {}
@@ -359,7 +474,7 @@ function UniReader:startHighLightMode()
local is_meet_end = false
local running = true
local cx, cy, cw, ch = self:rectCoordTransform(
local cx, cy, cw, ch = self:getRectInScreen(
t[l.cur][w.cur].x0,
t[l.cur][w.cur].y0,
t[l.cur][w.cur].x1,
@@ -379,23 +494,13 @@ function UniReader:startHighLightMode()
local ev = input.waitForEvent()
ev.code = adjustKeyEvents(ev)
if ev.type == EV_KEY and ev.value == EVENT_VALUE_KEY_PRESS then
if ev.code == KEY_FW_LEFT then
if w.cur == 1 then
w.cur = 0
w.new = 0
else
if w.cur == 0 then
-- already at the left end of current line,
-- goto previous line (_prevWord does not understand
-- zero w.cur)
w.cur = 1
end
l.new, w.new = _prevWord(t, l.cur, w.cur)
end
if ev.code == KEY_FW_LEFT and not is_meet_start then
is_meet_end = false
l.new, w.new, is_meet_start = _prevGap(t, l.cur, w.cur)
self.cursor:clear()
if w.new ~= 0
and not self:_isEntireWordInScreenHeightRange(t[l.new][w.new])
and not self:_isEntireLineInScreenHeightRange(t[l.new])
and self:_isEntireWordInScreenWidthRange(t[l.new][w.new]) then
-- word is in previous view
local pageno = self:prevView()
@@ -403,43 +508,7 @@ function UniReader:startHighLightMode()
end
-- update cursor
if w.cur == 0 then
-- meet line left end, must be handled as special case
if self:_isEntireWordInScreenRange(t[l.cur][1]) then
self:drawCursorBeforeWord(t, l.cur, 1)
end
else
if self:_isEntireWordInScreenRange(t[l.new][w.new]) then
self:drawCursorAfterWord(t, l.new, w.new)
end
end
elseif ev.code == KEY_FW_RIGHT then
if w.cur == 0 then
w.cur = 1
w.new = 1
else
l.new, w.new = _nextWord(t, l.cur, w.cur)
if w.new == 1 then
-- Must be come from the right end of previous line,
-- so goto the left end of current line.
w.cur = 0
w.new = 0
end
end
self.cursor:clear()
local tmp_w = w.new
if w.cur == 0 then
tmp_w = 1
end
if not self:_isEntireWordInScreenHeightRange(t[l.new][tmp_w])
and self:_isEntireWordInScreenWidthRange(t[l.new][tmp_w]) then
local pageno = self:nextView()
self:goto(pageno)
end
if w.cur == 0 then
if w.new == 0 then
-- meet line left end, must be handled as special case
if self:_isEntireWordInScreenRange(t[l.new][1]) then
self:drawCursorBeforeWord(t, l.new, 1)
@@ -449,24 +518,44 @@ function UniReader:startHighLightMode()
self:drawCursorAfterWord(t, l.new, w.new)
end
end
elseif ev.code == KEY_FW_UP then
if w.cur == 0 then
-- goto left end of last line
l.new = math.max(l.cur - 1, 1)
elseif l.cur == 1 and w.cur == 1 then
-- already first word, to the left end of first line
w.new = 0
else
l.new, w.new = _wordInPrevLine(t, l.cur, w.cur)
elseif ev.code == KEY_FW_RIGHT and not is_meet_end then
is_meet_start = false
l.new, w.new, is_meet_end = _nextGap(t, l.cur, w.cur)
self.cursor:clear()
-- we want to check whether the word is in screen range,
-- so trun gap into word
local tmp_w = w.new
if tmp_w == 0 then
tmp_w = 1
end
if not self:_isEntireLineInScreenHeightRange(t[l.new])
and self:_isEntireWordInScreenWidthRange(t[l.new][tmp_w]) then
local pageno = self:nextView()
self:goto(pageno)
end
if w.new == 0 then
-- meet line left end, must be handled as special case
if self:_isEntireWordInScreenRange(t[l.new][1]) then
self:drawCursorBeforeWord(t, l.new, 1)
end
else
if self:_isEntireWordInScreenRange(t[l.new][w.new]) then
self:drawCursorAfterWord(t, l.new, w.new)
end
end
elseif ev.code == KEY_FW_UP and not is_meet_start then
is_meet_end = false
l.new, w.new, is_meet_start = _gapInPrevLine(t, l.cur, w.cur)
self.cursor:clear()
local tmp_w = w.new
if w.cur == 0 then
if tmp_w == 0 then
tmp_w = 1
end
if not self:_isEntireWordInScreenHeightRange(t[l.new][tmp_w])
if not self:_isEntireLineInScreenHeightRange(t[l.new])
and self:_isEntireWordInScreenWidthRange(t[l.new][tmp_w]) then
-- goto next view of current page
local pageno = self:prevView()
@@ -482,14 +571,9 @@ function UniReader:startHighLightMode()
self:drawCursorAfterWord(t, l.new, w.new)
end
end
elseif ev.code == KEY_FW_DOWN then
if w.cur == 0 then
-- on the left end of current line,
-- goto left end of next line
l.new = math.min(l.cur + 1, #t)
else
l.new, w.new = _wordInNextLine(t, l.cur, w.cur)
end
elseif ev.code == KEY_FW_DOWN and not is_meet_end then
is_meet_start = false
l.new, w.new, is_meet_end = _gapInNextLine(t, l.cur, w.cur)
self.cursor:clear()
@@ -497,7 +581,7 @@ function UniReader:startHighLightMode()
if w.cur == 0 then
tmp_w = 1
end
if not self:_isEntireWordInScreenHeightRange(t[l.new][tmp_w])
if not self:_isEntireLineInScreenHeightRange(t[l.new])
and self:_isEntireWordInScreenWidthRange(t[l.new][tmp_w]) then
-- goto next view of current page
local pageno = self:nextView()
@@ -523,18 +607,14 @@ function UniReader:startHighLightMode()
and t[l.cur][w.cur].x1 <= line_item.x1 then
self.highlight[self.pageno][k] = nil
end
end -- EOF for line_item
end -- EOF for text_item
end -- EOF if not highlight table
end -- for line_item
end -- for text_item
end -- if not highlight table
if #self.highlight[self.pageno] == 0 then
self.highlight[self.pageno] = nil
end
return
elseif ev.code == KEY_FW_PRESS then
if w.cur == 0 then
w.cur = 1
l.cur, w.cur = _prevWord(t, l.cur, w.cur)
end
l.new, w.new = l.cur, w.cur
l.start, w.start = l.cur, w.cur
running = false
@@ -542,15 +622,23 @@ function UniReader:startHighLightMode()
elseif ev.code == KEY_BACK then
running = false
return
end -- EOF if key event
end -- if check key event
l.cur, w.cur = l.new, w.new
fb:refresh(1)
end
end -- EOF while
end -- while running
--print("start", l.cur, w.cur, l.start, w.start)
-- two helper functions for highlight
local function _togglePrevWordHighLight(t, l, w)
if w.cur == 0 then
if l.cur == 1 then
-- already at the begin of first line, nothing to toggle
return l, w, true
else
w.cur = 1
end
end
l.new, w.new = _prevWord(t, l.cur, w.cur)
if l.cur == 1 and w.cur == 1 then
@@ -560,7 +648,7 @@ function UniReader:startHighLightMode()
end
if w.new ~= 0 and
not self:_isEntireWordInScreenHeightRange(t[l.new][w.new]) then
not self:_isEntireLineInScreenHeightRange(t[l.new][w.new]) then
-- word out of left and right sides of current view should
-- not trigger pan by page
if self:_isEntireWordInScreenWidthRange(t[l.new][w.new]) then
@@ -597,7 +685,7 @@ function UniReader:startHighLightMode()
is_meet_end = true
end
if not self:_isEntireWordInScreenHeightRange(t[l.new][w.new]) then
if not self:_isEntireLineInScreenHeightRange(t[l.new]) then
if self:_isEntireWordInScreenWidthRange(t[l.new][w.new]) then
local pageno = self:nextView()
self:goto(pageno)
@@ -634,7 +722,7 @@ function UniReader:startHighLightMode()
is_meet_start = false
if not is_meet_end then
l, w, is_meet_end = _toggleNextWordHighLight(t, l, w)
end -- EOF if is not is_meet_end
end -- if not is_meet_end
elseif ev.code == KEY_FW_UP then
is_meet_end = false
if not is_meet_start then
@@ -648,7 +736,7 @@ function UniReader:startHighLightMode()
while not (tmp_l == l.cur and tmp_w == w.cur) do
l, w, is_meet_start = _togglePrevWordHighLight(t, l, w)
end
end
end -- not is_meet_start
elseif ev.code == KEY_FW_DOWN then
is_meet_start = false
if not is_meet_end then
@@ -716,18 +804,13 @@ function UniReader:startHighLightMode()
running = false
elseif ev.code == KEY_BACK then
running = false
end -- EOF if key event
end -- if key event
fb:refresh(1)
end
end -- EOF while
end
----------------------------------------------------
-- Renderer memory
----------------------------------------------------