rename mvc at lvc

1 files changed, 445 insertions, 0 deletions

diff --git a/lvc/widgets/osx/layoutmanager.py b/lvc/widgets/osx/layoutmanager.py
new file mode 100644
index 0000000..de4301b
--- /dev/null
+++ b/lvc/widgets/osx/layoutmanager.py
@@ -0,0 +1,445 @@
+# @Base: Miro - an RSS based video player application
+# Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
+# Participatory Culture Foundation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+#
+# In addition, as a special exception, the copyright holders give
+# permission to link the code of portions of this program with the OpenSSL
+# library.
+#
+# You must obey the GNU General Public License in all respects for all of
+# the code used other than OpenSSL. If you modify file(s) with this
+# exception, you may extend this exception to your version of the file(s),
+# but you are not obligated to do so. If you do not wish to do so, delete
+# this exception statement from your version. If you delete this exception
+# statement from all source files in the program, then also delete it here.
+
+"""textlayout.py -- Contains the LayoutManager class.  It handles laying text,
+buttons, getting font metrics and other tasks that are required to size
+things.
+"""
+import logging
+import math
+
+from AppKit import *
+from Foundation import *
+from objc import YES, NO, nil
+
+import drawing
+
+INFINITE = 1000000 # size of an "infinite" dimension
+
+class MiroLayoutManager(NSLayoutManager):
+    """Overide NSLayoutManager to draw better underlines."""
+
+    def drawUnderlineForGlyphRange_underlineType_baselineOffset_lineFragmentRect_lineFragmentGlyphRange_containerOrigin_(self, glyph_range, typ, offset, line_rect, line_glyph_range, container_origin):
+        container, _ = self.textContainerForGlyphAtIndex_effectiveRange_(glyph_range.location, None)
+        rect = self.boundingRectForGlyphRange_inTextContainer_(glyph_range, container)
+        x = container_origin.x + rect.origin.x
+        y = (container_origin.y + rect.origin.y + rect.size.height - offset)
+        underline_height, offset = self.calc_underline_extents(glyph_range)
+        y = math.ceil(y + offset) + underline_height / 2.0
+        path = NSBezierPath.bezierPath()
+        path.setLineWidth_(underline_height)
+        path.moveToPoint_(NSPoint(x, y))
+        path.relativeLineToPoint_(NSPoint(rect.size.width, 0))
+        path.stroke()
+
+    def calc_underline_extents(self, line_glyph_range):
+        index = self.characterIndexForGlyphAtIndex_(line_glyph_range.location)
+        font, _ = self.textStorage().attribute_atIndex_effectiveRange_(NSFontAttributeName, index, None)
+        # we use a couple of magic numbers that seems to work okay.  I (BDK)
+        # got it from some old mozilla code.
+        height = font.ascender() - font.descender()
+        height = max(1.0, round(0.05 * height))
+        offset = max(1.0, round(0.1 * height))
+        return height, offset
+
+class TextBoxPool(object):
+    """Handles a pool of TextBox objects.  We monitor the TextBox objects and
+    when those objects die, we reclaim them for the pool.
+
+    Creating TextBoxes is fairly expensive and NSLayoutManager do a lot of
+    caching, so it's useful to keep them around rather than destroying them.
+    """
+
+    def __init__(self):
+        self.used_text_boxes = []
+        self.available_text_boxes = []
+
+    def get(self):
+        """Get a NSLayoutManager, either from the pool or by creating a new
+        one.
+        """
+        try:
+            rv = self.available_text_boxes.pop()
+        except IndexError:
+            rv = TextBox()
+        self.used_text_boxes.append(rv)
+        return rv
+
+    def reclaim_textboxes(self):
+        """Move used TextBoxes back to the available pool.  This should be
+        called after the code using text boxes is done using all of them.
+        """
+        self.available_text_boxes.extend(self.used_text_boxes)
+        self.used_text_boxes[:] = []
+
+text_box_pool = TextBoxPool()
+
+class Font(object):
+    line_height_sizer = NSLayoutManager.alloc().init()
+
+    def __init__(self, nsfont):
+        self.nsfont = nsfont
+
+    def ascent(self):
+        return self.nsfont.ascender()
+
+    def descent(self):
+        return -self.nsfont.descender()
+
+    def line_height(self):
+        return Font.line_height_sizer.defaultLineHeightForFont_(self.nsfont)
+
+class FontPool(object):
+    def __init__(self):
+        self._cached_fonts = {}
+
+    def get(self, scale_factor, bold, italic, family):
+        cache_key = (scale_factor, bold, italic, family)
+        try:
+            return self._cached_fonts[cache_key]
+        except KeyError:
+            font = self._create(scale_factor, bold, italic, family)
+            self._cached_fonts[cache_key] = font
+            return font
+
+    def _create(self, scale_factor, bold, italic, family):
+        size = round(scale_factor * NSFont.systemFontSize())
+        nsfont = None
+        if family is not None:
+            if bold:
+                nsfont = NSFont.fontWithName_size_(family + " Bold", size)
+            else:
+                nsfont = NSFont.fontWithName_size_(family, size)
+            if nsfont is None:
+                logging.error('FontPool: family %s scale %s bold %s '
+                              'italic %s not found',
+                              family, scale_factor, bold, italic)
+        # Att his point either we have requested a custom font that failed
+        # to load or the system font was requested.
+        if nsfont is None:
+            if bold:
+                nsfont = NSFont.boldSystemFontOfSize_(size)
+            else:
+                nsfont = NSFont.systemFontOfSize_(size)
+        return Font(nsfont)
+
+class LayoutManager(object):
+    font_pool = FontPool()
+    default_font = font_pool.get(1.0, False, False, None)
+
+    def __init__(self):
+        self.current_font = self.default_font
+        self.set_text_color((0, 0, 0))
+        self.set_text_shadow(None)
+
+    def font(self, scale_factor, bold=False, italic=False, family=None):
+        return self.font_pool.get(scale_factor, bold, italic, family)
+
+    def set_font(self, scale_factor, bold=False, italic=False, family=None):
+        self.current_font = self.font(scale_factor, bold, italic, family)
+
+    def set_text_color(self, color):
+        self.text_color = color
+
+    def set_text_shadow(self, shadow):
+        self.shadow = shadow
+
+    def textbox(self, text, underline=False):
+        text_box = text_box_pool.get()
+        color = NSColor.colorWithDeviceRed_green_blue_alpha_(self.text_color[0], self.text_color[1], self.text_color[2], 1.0)
+        text_box.reset(text, self.current_font, color, self.shadow, underline)
+        return text_box
+
+    def button(self, text, pressed=False, disabled=False, style='normal'):
+        if style == 'webby':
+            return StyledButton(text, self.current_font, pressed, disabled)
+        else:
+            return NativeButton(text, self.current_font, pressed, disabled)
+
+    def reset(self):
+        text_box_pool.reclaim_textboxes()
+        self.current_font = self.default_font
+        self.text_color = (0, 0, 0)
+        self.shadow = None
+
+class TextBox(object):
+    def __init__(self):
+        self.layout_manager = MiroLayoutManager.alloc().init()
+        container = NSTextContainer.alloc().init()
+        container.setLineFragmentPadding_(0)
+        self.layout_manager.addTextContainer_(container)
+        self.layout_manager.setUsesFontLeading_(NO)
+        self.text_storage = NSTextStorage.alloc().init()
+        self.text_storage.addLayoutManager_(self.layout_manager)
+        self.text_container = self.layout_manager.textContainers()[0]
+
+    def reset(self, text, font, color, shadow, underline):
+        """Reset the text box so it's ready to be used by a new owner."""
+        self.text_storage.deleteCharactersInRange_(NSRange(0,
+            self.text_storage.length()))
+        self.text_container.setContainerSize_(NSSize(INFINITE, INFINITE))
+        self.paragraph_style = NSMutableParagraphStyle.alloc().init()
+        self.font = font
+        self.color = color
+        self.shadow = shadow
+        self.width = None
+        self.set_text(text, underline=underline)
+
+    def make_attr_string(self, text, color, font, underline):
+        attributes = NSMutableDictionary.alloc().init()
+        if color is not None:
+            nscolor = NSColor.colorWithDeviceRed_green_blue_alpha_(color[0], color[1], color[2], 1.0)
+            attributes.setObject_forKey_(nscolor, NSForegroundColorAttributeName)
+        else:
+            attributes.setObject_forKey_(self.color, NSForegroundColorAttributeName)
+        if font is not None:
+            attributes.setObject_forKey_(font.nsfont, NSFontAttributeName)
+        else:
+            attributes.setObject_forKey_(self.font.nsfont, NSFontAttributeName)
+        if underline:
+            attributes.setObject_forKey_(NSUnderlineStyleSingle, NSUnderlineStyleAttributeName)
+        attributes.setObject_forKey_(self.paragraph_style.copy(), NSParagraphStyleAttributeName)
+        if text is None:
+            text = ""
+        return NSAttributedString.alloc().initWithString_attributes_(text, attributes)
+
+    def set_text(self, text, color=None, font=None, underline=False):
+        string = self.make_attr_string(text, color, font, underline)
+        self.text_storage.setAttributedString_(string)
+
+    def append_text(self, text, color=None, font=None, underline=False):
+        string = self.make_attr_string(text, color, font, underline)
+        self.text_storage.appendAttributedString_(string)
+
+    def set_width(self, width):
+        if width is not None:
+            self.text_container.setContainerSize_(NSSize(width, INFINITE))
+        else:
+            self.text_container.setContainerSize_(NSSize(INFINITE, INFINITE))
+        self.width = width
+
+    def update_paragraph_style(self):
+        attr = NSParagraphStyleAttributeName
+        value = self.paragraph_style.copy()
+        rnge = NSMakeRange(0, self.text_storage.length())
+        self.text_storage.addAttribute_value_range_(attr, value, rnge)
+
+    def set_wrap_style(self, wrap):
+        if wrap == 'word':
+            self.paragraph_style.setLineBreakMode_(NSLineBreakByWordWrapping)
+        elif wrap == 'char':
+            self.paragraph_style.setLineBreakMode_(NSLineBreakByCharWrapping)
+        elif wrap == 'truncated-char':
+            self.paragraph_style.setLineBreakMode_(NSLineBreakByTruncatingTail)
+        else:
+            raise ValueError("Unknown wrap value: %s" % wrap)
+        self.update_paragraph_style()
+
+    def set_alignment(self, align):
+        if align == 'left':
+            self.paragraph_style.setAlignment_(NSLeftTextAlignment)
+        elif align == 'right':
+            self.paragraph_style.setAlignment_(NSRightTextAlignment)
+        elif align == 'center':
+            self.paragraph_style.setAlignment_(NSCenterTextAlignment)
+        else:
+            raise ValueError("Unknown align value: %s" % align)
+        self.update_paragraph_style()
+
+    def get_size(self):
+        # The next line is there just to force cocoa to layout the text
+        self.layout_manager.glyphRangeForTextContainer_(self.text_container)
+        rect = self.layout_manager.usedRectForTextContainer_(self.text_container)
+        return rect.size.width, rect.size.height
+
+    def char_at(self, x, y):
+        width, height = self.get_size()
+        if 0 <= x < width and 0 <= y < height:
+            index, _ = self.layout_manager.glyphIndexForPoint_inTextContainer_fractionOfDistanceThroughGlyph_(NSPoint(x, y), self.text_container, None)
+            return index
+        else:
+            return None
+
+    def draw(self, context, x, y, width, height):
+        if self.shadow is not None:
+            context.save()
+            context.set_shadow(self.shadow.color, self.shadow.opacity, self.shadow.offset, self.shadow.blur_radius)
+        self.width = width
+        self.text_container.setContainerSize_(NSSize(width, height))
+        glyph_range = self.layout_manager.glyphRangeForTextContainer_(self.text_container)
+        self.layout_manager.drawGlyphsForGlyphRange_atPoint_(glyph_range, NSPoint(x, y))
+        if self.shadow is not None:
+            context.restore()
+        context.path.removeAllPoints()
+
+class NativeButton(object):
+
+    def __init__(self, text, font, pressed, disabled=False):
+        self.min_width = 0
+        self.cell = NSButtonCell.alloc().init()
+        self.cell.setBezelStyle_(NSRoundRectBezelStyle)
+        self.cell.setButtonType_(NSMomentaryPushInButton)
+        self.cell.setFont_(font.nsfont)
+        self.cell.setEnabled_(not disabled)
+        self.cell.setTitle_(text)
+        if pressed:
+            self.cell.setState_(NSOnState)
+        else:
+            self.cell.setState_(NSOffState)
+        self.cell.setImagePosition_(NSImageLeft)
+
+    def set_icon(self, icon):
+        image = icon.image.copy()
+        image.setFlipped_(NO)
+        self.cell.setImage_(image)
+
+    def get_size(self):
+        size = self.cell.cellSize()
+        return size.width, size.height
+
+    def draw(self, context, x, y, width, height):
+        rect = NSMakeRect(x, y, width, height)
+        NSGraphicsContext.currentContext().saveGraphicsState()
+        self.cell.drawWithFrame_inView_(rect, context.view)
+        NSGraphicsContext.currentContext().restoreGraphicsState()
+        context.path.removeAllPoints()
+
+class StyledButton(object):
+    PAD_HORIZONTAL = 11
+    BIG_PAD_VERTICAL = 4
+    SMALL_PAD_VERTICAL = 2
+    TOP_COLOR = (1, 1, 1)
+    BOTTOM_COLOR = (0.86, 0.86, 0.86)
+    LINE_COLOR_TOP = (0.71, 0.71, 0.71)
+    LINE_COLOR_BOTTOM = (0.45, 0.45, 0.45)
+    TEXT_COLOR = (0.19, 0.19, 0.19)
+    DISABLED_COLOR = (0.86, 0.86, 0.86)
+    DISABLED_TEXT_COLOR = (0.43, 0.43, 0.43)
+    ICON_PAD = 8
+
+    def __init__(self, text, font, pressed, disabled=False):
+        self.pressed = pressed
+        self.disabled = disabled
+        attributes = NSMutableDictionary.alloc().init()
+        attributes.setObject_forKey_(font.nsfont, NSFontAttributeName)
+        if self.disabled:
+            color = self.DISABLED_TEXT_COLOR
+        else:
+            color = self.TEXT_COLOR
+        nscolor = NSColor.colorWithDeviceRed_green_blue_alpha_(color[0], color[1], color[2], 1.0)
+        attributes.setObject_forKey_(nscolor, NSForegroundColorAttributeName)
+        self.title = NSAttributedString.alloc().initWithString_attributes_(text, attributes)
+        self.image = None
+
+    def set_icon(self, icon):
+        self.image = icon.image.copy()
+        self.image.setFlipped_(YES)
+
+    def get_size(self):
+        width, height = self.get_text_size()
+        if self.image is not None:
+            width += self.image.size().width + self.ICON_PAD
+            height = max(height, self.image.size().height)
+            height += self.BIG_PAD_VERTICAL * 2
+        else:
+            height += self.SMALL_PAD_VERTICAL * 2
+        if height % 2 == 1:
+            # make height even so that the radius of our circle is whole
+            height += 1
+        width += self.PAD_HORIZONTAL * 2
+        return width, height
+
+    def get_text_size(self):
+        size = self.title.size()
+        return size.width, size.height
+
+    def draw(self, context, x, y, width, height):
+        self._draw_button(context, x, y, width, height)
+        self._draw_title(context, x, y)
+        context.path.removeAllPoints()
+
+    def _draw_button(self, context, x, y, width, height):
+        radius = height / 2
+        self._draw_path(context, x, y, width, height, radius)
+        if self.disabled:
+            end_color = self.DISABLED_COLOR
+            start_color = self.DISABLED_COLOR
+        elif self.pressed:
+            end_color = self.TOP_COLOR
+            start_color = self.BOTTOM_COLOR
+        else:
+            context.set_line_width(1)
+            start_color = self.TOP_COLOR
+            end_color = self.BOTTOM_COLOR
+        gradient = drawing.Gradient(x, y, x, y+height)
+        gradient.set_start_color(start_color)
+        gradient.set_end_color(end_color)
+        context.gradient_fill(gradient)
+        self._draw_border(context, x, y, width, height, radius)
+
+    def _draw_path(self, context, x, y, width, height, radius):
+        inner_width = width - radius * 2
+        context.move_to(x + radius, y)
+        context.rel_line_to(inner_width, 0)
+        context.arc(x + width - radius, y+radius, radius, -math.pi/2, math.pi/2)
+        context.rel_line_to(-inner_width, 0)
+        context.arc(x + radius, y+radius, radius, math.pi/2, -math.pi/2)
+
+    def _draw_path_reverse(self, context, x, y, width, height, radius):
+        inner_width = width - radius * 2
+        context.move_to(x + radius, y)
+        context.arc_negative(x + radius, y+radius, radius, -math.pi/2, math.pi/2)
+        context.rel_line_to(inner_width, 0)
+        context.arc_negative(x + width - radius, y+radius, radius, math.pi/2, -math.pi/2)
+        context.rel_line_to(-inner_width, 0)
+
+    def _draw_border(self, context, x, y, width, height, radius):
+        self._draw_path(context, x, y, width, height, radius)
+        self._draw_path_reverse(context, x+1, y+1, width-2, height-2, radius-1)
+        gradient = drawing.Gradient(x, y, x, y+height)
+        gradient.set_start_color(self.LINE_COLOR_TOP)
+        gradient.set_end_color(self.LINE_COLOR_BOTTOM)
+        context.save()
+        context.clip()
+        context.rectangle(x, y, width, height)
+        context.gradient_fill(gradient)
+        context.restore()
+
+    def _draw_title(self, context, x, y):
+        c_width, c_height = self.get_size()
+        t_width, t_height = self.get_text_size()
+        x = x + self.PAD_HORIZONTAL
+        y = y + (c_height - t_height) / 2
+        if self.image is not None:
+            self.image.drawAtPoint_fromRect_operation_fraction_(
+                NSPoint(x, y+3), NSZeroRect, NSCompositeSourceOver, 1.0)
+            x += self.image.size().width + self.ICON_PAD
+        else:
+            y += 0.5
+        self.title.drawAtPoint_(NSPoint(x, y))