liquid shader and basic text render

1 files changed, 145 insertions, 0 deletions

diff --git a/textbox.lua b/textbox.lua
new file mode 100644
index 0000000..35b66a4
--- /dev/null
+++ b/textbox.lua
@@ -0,0 +1,145 @@
+local fonts = require("fonts")
+
+local Textbox = {}
+Textbox.__index = Textbox
+
+function Textbox:new()
+    local self = setmetatable({}, Textbox)
+    self.active = false
+    self.text = ""
+    self.visibleText = ""
+    self.mode = "show"
+    self.x = 0
+    self.y = 0
+    self.align = "center"
+    self.maxLines = nil
+    self.maxChars = nil
+    self.charIndex = 0
+    self.timer = 0
+    self.speed = 0.03
+    self.width = 0
+    self.height = 0
+    self.lines = {}
+    return self
+end
+
+function Textbox:show(text, pos, mode, opts)
+    opts = opts or {}
+    self.text = text
+    self.mode = mode or "show"
+    self.x = pos[1]
+    self.y = pos[2]
+    self.align = pos[3] or "center"
+    self.maxLines = opts.maxLines
+    self.maxChars = opts.maxChars
+    self.fontSize = opts.fontSize
+    self.centeredText = opts.centeredText
+    self.wrapToFit = opts.wrapToFit
+    self.life = opts.life
+    self.lifeTimer = 0
+    self.charIndex = 0
+    self.visibleText = ""
+    self.timer = 0
+    self.active = true
+    self:layout()
+end
+
+function Textbox:layout()
+    self.maxLines = self.maxLines or 4
+    self.maxChars = self.maxChars or 40
+    self.font = self.fontSize and fonts.get(self.fontSize) or love.graphics.getFont()
+    local padding = 10
+    if self.wrapToFit then
+        local tempWidth = self.font:getWidth(string.rep("A", self.maxChars))
+        local _, lines = self.font:getWrap(self.text, tempWidth)
+        self.lines = lines or {}
+        self.lines = self.lines or {}
+        local maxW = 0
+        for _, line in ipairs(self.lines) do
+            local w = self.font:getWidth(line)
+            if w > maxW then maxW = w end
+        end
+        local lineCount = math.max(1, #self.lines)
+        self.width = maxW + padding * 2
+        self.height = self.font:getHeight() * lineCount + padding * 2
+    else
+        self.width = self.font:getWidth(string.rep("A", self.maxChars)) + padding * 2
+        self.height = self.font:getHeight() * self.maxLines + padding * 2
+    end
+end
+
+function Textbox:wrap(text)
+    local lines = {}
+    local line = ""
+    for word in text:gmatch("%S+") do
+        if line == "" then
+            line = word
+        elseif #line + #word + 1 <= self.maxChars then
+            line = line .. " " .. word
+        else
+            table.insert(lines, line)
+            line = word
+        end
+    end
+    if line ~= "" then
+        table.insert(lines, line)
+    end
+    return lines
+end
+
+function Textbox:update(dt)
+    if not self.active then return end
+    if self.life then
+        self.lifeTimer = self.lifeTimer + dt
+        if self.lifeTimer >= self.life then
+            self:hide()
+            return
+        end
+    end
+    if self.mode == "write" then
+        self.timer = self.timer + dt
+        if self.timer > self.speed then
+            self.timer = 0
+            self.charIndex = self.charIndex + 1
+            self.visibleText = self.text:sub(1, self.charIndex)
+        end
+    else
+        self.visibleText = self.text
+    end
+end
+
+function Textbox:draw()
+    if not self.active then return end
+    local x = self.x
+    local y = self.y
+    if self.align == "center" then
+        x = x - self.width / 2
+        y = y - self.height / 2
+    elseif self.align == "right" then
+        x = x - self.width
+    end
+    local padding = 10
+    local textAlign = self.centeredText and "center" or "left"
+    local textX = x + padding
+    local textY = y + padding
+    if self.centeredText then
+        local _, wrappedLines = self.font:getWrap(self.visibleText, self.width - padding * 2)
+        local numLines = wrappedLines and #wrappedLines or 1
+        local textHeight = self.font:getHeight() * numLines
+        local vertExtra = math.max(0, self.height - padding * 2 - textHeight)
+        textY = y + padding + vertExtra / 2
+    end
+    local prevFont = love.graphics.getFont()
+    love.graphics.setFont(self.font)
+    love.graphics.setColor(0, 0, 0, 0.8)
+    love.graphics.rectangle("fill", x, y, self.width, self.height)
+    love.graphics.setColor(1, 1, 1, 1)
+    love.graphics.printf(self.visibleText, textX, textY, self.width - padding * 2, textAlign)
+    love.graphics.setFont(prevFont)
+end
+
+function Textbox:hide()
+    self.active = false
+end
+
+return Textbox