443 lines
12 KiB
Lua
443 lines
12 KiB
Lua
local core = require "core"
|
|
local common = require "core.common"
|
|
local config = require "core.config"
|
|
local style = require "core.style"
|
|
local keymap = require "core.keymap"
|
|
local translate = require "core.doc.translate"
|
|
local View = require "core.view"
|
|
|
|
|
|
local DocView = View:extend()
|
|
|
|
DocView.context = "session"
|
|
|
|
local function move_to_line_offset(dv, line, col, offset)
|
|
local xo = dv.last_x_offset
|
|
if xo.line ~= line or xo.col ~= col then
|
|
xo.offset = dv:get_col_x_offset(line, col)
|
|
end
|
|
xo.line = line + offset
|
|
xo.col = dv:get_x_offset_col(line + offset, xo.offset)
|
|
return xo.line, xo.col
|
|
end
|
|
|
|
|
|
DocView.translate = {
|
|
["previous_page"] = function(doc, line, col, dv)
|
|
local min, max = dv:get_visible_line_range()
|
|
return line - (max - min), 1
|
|
end,
|
|
|
|
["next_page"] = function(doc, line, col, dv)
|
|
local min, max = dv:get_visible_line_range()
|
|
return line + (max - min), 1
|
|
end,
|
|
|
|
["previous_line"] = function(doc, line, col, dv)
|
|
if line == 1 then
|
|
return 1, 1
|
|
end
|
|
return move_to_line_offset(dv, line, col, -1)
|
|
end,
|
|
|
|
["next_line"] = function(doc, line, col, dv)
|
|
if line == #doc.lines then
|
|
return #doc.lines, math.huge
|
|
end
|
|
return move_to_line_offset(dv, line, col, 1)
|
|
end,
|
|
}
|
|
|
|
|
|
function DocView:new(doc)
|
|
DocView.super.new(self)
|
|
self.cursor = "ibeam"
|
|
self.scrollable = true
|
|
self.doc = assert(doc)
|
|
self.font = "code_font"
|
|
self.last_x_offset = {}
|
|
end
|
|
|
|
|
|
function DocView:try_close(do_close)
|
|
if self.doc:is_dirty()
|
|
and #core.get_views_referencing_doc(self.doc) == 1 then
|
|
core.command_view:enter("Unsaved Changes; Confirm Close", function(_, item)
|
|
if item.text:match("^[cC]") then
|
|
do_close()
|
|
elseif item.text:match("^[sS]") then
|
|
self.doc:save()
|
|
do_close()
|
|
end
|
|
end, function(text)
|
|
local items = {}
|
|
if not text:find("^[^cC]") then table.insert(items, "Close Without Saving") end
|
|
if not text:find("^[^sS]") then table.insert(items, "Save And Close") end
|
|
return items
|
|
end)
|
|
else
|
|
do_close()
|
|
end
|
|
end
|
|
|
|
|
|
function DocView:get_name()
|
|
local post = self.doc:is_dirty() and "*" or ""
|
|
local name = self.doc:get_name()
|
|
return name:match("[^/%\\]*$") .. post
|
|
end
|
|
|
|
|
|
function DocView:get_filename()
|
|
if self.doc.abs_filename then
|
|
local post = self.doc:is_dirty() and "*" or ""
|
|
return common.home_encode(self.doc.abs_filename) .. post
|
|
end
|
|
return self:get_name()
|
|
end
|
|
|
|
|
|
function DocView:get_scrollable_size()
|
|
return self:get_line_height() * (#self.doc.lines - 1) + self.size.y
|
|
end
|
|
|
|
|
|
function DocView:get_font()
|
|
return style[self.font]
|
|
end
|
|
|
|
|
|
function DocView:get_line_height()
|
|
return math.floor(self:get_font():get_height() * config.line_height)
|
|
end
|
|
|
|
|
|
function DocView:get_gutter_width()
|
|
local padding = style.padding.x * 2
|
|
return self:get_font():get_width(#self.doc.lines) + padding, padding
|
|
end
|
|
|
|
|
|
function DocView:get_line_screen_position(idx)
|
|
local x, y = self:get_content_offset()
|
|
local lh = self:get_line_height()
|
|
local gw = self:get_gutter_width()
|
|
return x + gw, y + (idx-1) * lh + style.padding.y
|
|
end
|
|
|
|
|
|
function DocView:get_line_text_y_offset()
|
|
local lh = self:get_line_height()
|
|
local th = self:get_font():get_height()
|
|
return (lh - th) / 2
|
|
end
|
|
|
|
|
|
function DocView:get_visible_line_range()
|
|
local x, y, x2, y2 = self:get_content_bounds()
|
|
local lh = self:get_line_height()
|
|
local minline = math.max(1, math.floor(y / lh))
|
|
local maxline = math.min(#self.doc.lines, math.floor(y2 / lh) + 1)
|
|
return minline, maxline
|
|
end
|
|
|
|
|
|
function DocView:get_col_x_offset(line, col)
|
|
local default_font = self:get_font()
|
|
local column = 1
|
|
local xoffset = 0
|
|
for _, type, text in self.doc.highlighter:each_token(line) do
|
|
local font = style.syntax_fonts[type] or default_font
|
|
for char in common.utf8_chars(text) do
|
|
if column == col then
|
|
return xoffset
|
|
end
|
|
xoffset = xoffset + font:get_width(char)
|
|
column = column + #char
|
|
end
|
|
end
|
|
|
|
return xoffset
|
|
end
|
|
|
|
|
|
function DocView:get_x_offset_col(line, x)
|
|
local line_text = self.doc.lines[line]
|
|
|
|
local xoffset, last_i, i = 0, 1, 1
|
|
local default_font = self:get_font()
|
|
for _, type, text in self.doc.highlighter:each_token(line) do
|
|
local font = style.syntax_fonts[type] or default_font
|
|
for char in common.utf8_chars(text) do
|
|
local w = font:get_width(char)
|
|
if xoffset >= x then
|
|
return (xoffset - x > w / 2) and last_i or i
|
|
end
|
|
xoffset = xoffset + w
|
|
last_i = i
|
|
i = i + #char
|
|
end
|
|
end
|
|
|
|
return #line_text
|
|
end
|
|
|
|
|
|
function DocView:resolve_screen_position(x, y)
|
|
local ox, oy = self:get_line_screen_position(1)
|
|
local line = math.floor((y - oy) / self:get_line_height()) + 1
|
|
line = common.clamp(line, 1, #self.doc.lines)
|
|
local col = self:get_x_offset_col(line, x - ox)
|
|
return line, col
|
|
end
|
|
|
|
|
|
function DocView:scroll_to_line(line, ignore_if_visible, instant)
|
|
local min, max = self:get_visible_line_range()
|
|
if not (ignore_if_visible and line > min and line < max) then
|
|
local lh = self:get_line_height()
|
|
self.scroll.to.y = math.max(0, lh * (line - 1) - self.size.y / 2)
|
|
if instant then
|
|
self.scroll.y = self.scroll.to.y
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
function DocView:scroll_to_make_visible(line, col)
|
|
local min = self:get_line_height() * (line - 1)
|
|
local max = self:get_line_height() * (line + 2) - self.size.y
|
|
self.scroll.to.y = math.min(self.scroll.to.y, min)
|
|
self.scroll.to.y = math.max(self.scroll.to.y, max)
|
|
local gw = self:get_gutter_width()
|
|
local xoffset = self:get_col_x_offset(line, col)
|
|
local xmargin = 3 * self:get_font():get_width(' ')
|
|
local xsup = xoffset + gw + xmargin
|
|
local xinf = xoffset - xmargin
|
|
if xsup > self.scroll.x + self.size.x then
|
|
self.scroll.to.x = xsup - self.size.x
|
|
elseif xinf < self.scroll.x then
|
|
self.scroll.to.x = math.max(0, xinf)
|
|
end
|
|
end
|
|
|
|
|
|
local function mouse_selection(doc, clicks, line1, col1, line2, col2)
|
|
local swap = line2 < line1 or line2 == line1 and col2 <= col1
|
|
if swap then
|
|
line1, col1, line2, col2 = line2, col2, line1, col1
|
|
end
|
|
if clicks % 4 == 2 then
|
|
line1, col1 = translate.start_of_word(doc, line1, col1)
|
|
line2, col2 = translate.end_of_word(doc, line2, col2)
|
|
elseif clicks % 4 == 3 then
|
|
if line2 == #doc.lines and doc.lines[#doc.lines] ~= "\n" then
|
|
doc:insert(math.huge, math.huge, "\n")
|
|
end
|
|
line1, col1, line2, col2 = line1, 1, line2 + 1, 1
|
|
end
|
|
if swap then
|
|
return line2, col2, line1, col1
|
|
end
|
|
return line1, col1, line2, col2
|
|
end
|
|
|
|
|
|
function DocView:on_mouse_pressed(button, x, y, clicks)
|
|
local caught = DocView.super.on_mouse_pressed(self, button, x, y, clicks)
|
|
if caught then
|
|
return
|
|
end
|
|
if keymap.modkeys["shift"] then
|
|
if clicks % 2 == 1 then
|
|
local line1, col1 = select(3, self.doc:get_selection())
|
|
local line2, col2 = self:resolve_screen_position(x, y)
|
|
self.doc:set_selection(line2, col2, line1, col1)
|
|
end
|
|
else
|
|
local line, col = self:resolve_screen_position(x, y)
|
|
if keymap.modkeys["ctrl"] then
|
|
self.doc:add_selection(mouse_selection(self.doc, clicks, line, col, line, col))
|
|
else
|
|
self.doc:set_selection(mouse_selection(self.doc, clicks, line, col, line, col))
|
|
end
|
|
self.mouse_selecting = { line, col, clicks = clicks }
|
|
end
|
|
core.blink_reset()
|
|
end
|
|
|
|
|
|
function DocView:on_mouse_moved(x, y, ...)
|
|
DocView.super.on_mouse_moved(self, x, y, ...)
|
|
|
|
if self:scrollbar_overlaps_point(x, y) or self.dragging_scrollbar then
|
|
self.cursor = "arrow"
|
|
else
|
|
self.cursor = "ibeam"
|
|
end
|
|
|
|
if self.mouse_selecting then
|
|
local l1, c1 = self:resolve_screen_position(x, y)
|
|
local l2, c2 = table.unpack(self.mouse_selecting)
|
|
local clicks = self.mouse_selecting.clicks
|
|
if keymap.modkeys["ctrl"] then
|
|
if l1 > l2 then l1, l2 = l2, l1 end
|
|
self.doc.selections = { }
|
|
for i = l1, l2 do
|
|
self.doc:set_selections(i - l1 + 1, i, math.min(c1, #self.doc.lines[i]), i, math.min(c2, #self.doc.lines[i]))
|
|
end
|
|
else
|
|
self.doc:set_selection(mouse_selection(self.doc, clicks, l1, c1, l2, c2))
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
function DocView:on_mouse_released(button)
|
|
DocView.super.on_mouse_released(self, button)
|
|
self.mouse_selecting = nil
|
|
end
|
|
|
|
|
|
function DocView:on_text_input(text)
|
|
self.doc:text_input(text)
|
|
end
|
|
|
|
|
|
function DocView:update()
|
|
-- scroll to make caret visible and reset blink timer if it moved
|
|
local line, col = self.doc:get_selection()
|
|
if (line ~= self.last_line or col ~= self.last_col) and self.size.x > 0 then
|
|
if core.active_view == self then
|
|
self:scroll_to_make_visible(line, col)
|
|
end
|
|
core.blink_reset()
|
|
self.last_line, self.last_col = line, col
|
|
end
|
|
|
|
-- update blink timer
|
|
if self == core.active_view and not self.mouse_selecting then
|
|
local T, t0 = config.blink_period, core.blink_start
|
|
local ta, tb = core.blink_timer, system.get_time()
|
|
if ((tb - t0) % T < T / 2) ~= ((ta - t0) % T < T / 2) then
|
|
core.redraw = true
|
|
end
|
|
core.blink_timer = tb
|
|
end
|
|
|
|
DocView.super.update(self)
|
|
end
|
|
|
|
|
|
function DocView:draw_line_highlight(x, y)
|
|
local lh = self:get_line_height()
|
|
renderer.draw_rect(x, y, self.size.x, lh, style.line_highlight)
|
|
end
|
|
|
|
|
|
function DocView:draw_line_text(idx, x, y)
|
|
local default_font = self:get_font()
|
|
local tx, ty = x, y + self:get_line_text_y_offset()
|
|
for _, type, text in self.doc.highlighter:each_token(idx) do
|
|
local color = style.syntax[type]
|
|
local font = style.syntax_fonts[type] or default_font
|
|
tx = renderer.draw_text(font, text, tx, ty, color)
|
|
end
|
|
end
|
|
|
|
function DocView:draw_caret(x, y)
|
|
local lh = self:get_line_height()
|
|
renderer.draw_rect(x, y, style.caret_width, lh, style.caret)
|
|
end
|
|
|
|
function DocView:draw_line_body(idx, x, y)
|
|
-- draw selection if it overlaps this line
|
|
for lidx, line1, col1, line2, col2 in self.doc:get_selections(true) do
|
|
if idx >= line1 and idx <= line2 then
|
|
local text = self.doc.lines[idx]
|
|
if line1 ~= idx then col1 = 1 end
|
|
if line2 ~= idx then col2 = #text + 1 end
|
|
local x1 = x + self:get_col_x_offset(idx, col1)
|
|
local x2 = x + self:get_col_x_offset(idx, col2)
|
|
local lh = self:get_line_height()
|
|
if x1 ~= x2 then
|
|
renderer.draw_rect(x1, y, x2 - x1, lh, style.selection)
|
|
end
|
|
end
|
|
end
|
|
local draw_highlight = nil
|
|
for lidx, line1, col1, line2, col2 in self.doc:get_selections(true) do
|
|
-- draw line highlight if caret is on this line
|
|
if draw_highlight ~= false and config.highlight_current_line
|
|
and line1 == idx and core.active_view == self then
|
|
draw_highlight = (line1 == line2 and col1 == col2)
|
|
end
|
|
end
|
|
if draw_highlight then self:draw_line_highlight(x + self.scroll.x, y) end
|
|
|
|
-- draw line's text
|
|
self:draw_line_text(idx, x, y)
|
|
end
|
|
|
|
|
|
function DocView:draw_line_gutter(idx, x, y, width)
|
|
local color = style.line_number
|
|
for _, line1, _, line2 in self.doc:get_selections(true) do
|
|
if idx >= line1 and idx <= line2 then
|
|
color = style.line_number2
|
|
break
|
|
end
|
|
end
|
|
local yoffset = self:get_line_text_y_offset()
|
|
x = x + style.padding.x
|
|
common.draw_text(self:get_font(), color, idx, "right", x, y + yoffset, width, self:get_line_height())
|
|
end
|
|
|
|
|
|
function DocView:draw_overlay()
|
|
if core.active_view == self then
|
|
local minline, maxline = self:get_visible_line_range()
|
|
-- draw caret if it overlaps this line
|
|
local T = config.blink_period
|
|
for _, line, col in self.doc:get_selections() do
|
|
if line >= minline and line <= maxline
|
|
and (core.blink_timer - core.blink_start) % T < T / 2
|
|
and system.window_has_focus() then
|
|
local x, y = self:get_line_screen_position(line)
|
|
self:draw_caret(x + self:get_col_x_offset(line, col), y)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
function DocView:draw()
|
|
self:draw_background(style.background)
|
|
|
|
self:get_font():set_tab_size(config.indent_size)
|
|
|
|
local minline, maxline = self:get_visible_line_range()
|
|
local lh = self:get_line_height()
|
|
|
|
local x, y = self:get_line_screen_position(minline)
|
|
local gw, gpad = self:get_gutter_width()
|
|
for i = minline, maxline do
|
|
self:draw_line_gutter(i, self.position.x, y, gpad and gw - gpad or gw)
|
|
y = y + lh
|
|
end
|
|
|
|
local pos = self.position
|
|
x, y = self:get_line_screen_position(minline)
|
|
core.push_clip_rect(pos.x + gw, pos.y, self.size.x, self.size.y)
|
|
for i = minline, maxline do
|
|
self:draw_line_body(i, x, y)
|
|
y = y + lh
|
|
end
|
|
self:draw_overlay()
|
|
core.pop_clip_rect()
|
|
|
|
self:draw_scrollbar()
|
|
end
|
|
|
|
|
|
return DocView
|