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