diff options
Diffstat (limited to 'source/rendering/StarTextPainter.cpp')
| -rw-r--r-- | source/rendering/StarTextPainter.cpp | 327 |
1 files changed, 214 insertions, 113 deletions
diff --git a/source/rendering/StarTextPainter.cpp b/source/rendering/StarTextPainter.cpp index eb161d4..d6bb9be 100644 --- a/source/rendering/StarTextPainter.cpp +++ b/source/rendering/StarTextPainter.cpp @@ -11,14 +11,55 @@ namespace Text { return std::regex_replace(s.utf8(), stripEscapeRegex, ""); } + inline bool isEscapeCode(char c) { + return c == CmdEsc || c == StartEsc; + } + + static std::string escapeChars = strf("{:c}{:c}", CmdEsc, StartEsc); + + typedef function<bool(StringView text)> TextCallback; + typedef function<bool(StringView commands)> CommandsCallback; + void processText(StringView text, TextCallback textFunc, CommandsCallback commandsFunc = CommandsCallback(), bool includeCommandSides = false) { + std::string_view escChars(escapeChars); + + std::string_view str = text.utf8(); + while (true) { + size_t escape = str.find_first_of(escChars); + if (escape != NPos) { + escape = str.find_first_not_of(escChars, escape) - 1; // jump to the last ^ + + size_t end = str.find_first_of(EndEsc, escape); + if (end != NPos) { + if (escape != end && !textFunc(str.substr(0, escape))) + break; + if (commandsFunc) { + StringView commands = includeCommandSides + ? str.substr(escape, end - escape + 1) + : str.substr(escape + 1, end - escape - 1); + if (!commands.empty() && !commandsFunc(commands)) + break; + } + str = str.substr(end + 1); + continue; + } + } + + if (!str.empty()) + textFunc(str); + + break; + } + } + + // The below two functions aren't used anymore, not bothering with StringView for them String preprocessEscapeCodes(String const& s) { bool escape = false; - auto result = s.utf8(); + std::string result = s.utf8(); size_t escapeStartIdx = 0; for (size_t i = 0; i < result.size(); i++) { auto& c = result[i]; - if (c == CmdEsc || c == StartEsc) { + if (isEscapeCode(c)) { escape = true; escapeStartIdx = i; } @@ -97,7 +138,7 @@ TextPainter::TextPainter(RendererPtr renderer, TextureGroupPtr textureGroup) Root::singleton().registerReloadListener(m_reloadTracker); } -RectF TextPainter::renderText(String const& s, TextPositioning const& position) { +RectF TextPainter::renderText(StringView s, TextPositioning const& position) { if (position.charLimit) { unsigned charLimit = *position.charLimit; return doRenderText(s, position, true, &charLimit); @@ -106,7 +147,7 @@ RectF TextPainter::renderText(String const& s, TextPositioning const& position) } } -RectF TextPainter::renderLine(String const& s, TextPositioning const& position) { +RectF TextPainter::renderLine(StringView s, TextPositioning const& position) { if (position.charLimit) { unsigned charLimit = *position.charLimit; return doRenderLine(s, position, true, &charLimit); @@ -119,11 +160,11 @@ RectF TextPainter::renderGlyph(String::Char c, TextPositioning const& position) return doRenderGlyph(c, position, true); } -RectF TextPainter::determineTextSize(String const& s, TextPositioning const& position) { +RectF TextPainter::determineTextSize(StringView s, TextPositioning const& position) { return doRenderText(s, position, false, nullptr); } -RectF TextPainter::determineLineSize(String const& s, TextPositioning const& position) { +RectF TextPainter::determineLineSize(StringView s, TextPositioning const& position) { return doRenderLine(s, position, false, nullptr); } @@ -135,88 +176,81 @@ int TextPainter::glyphWidth(String::Char c) { return m_fontTextureGroup.glyphWidth(c, m_fontSize); } -int TextPainter::stringWidth(String const& s) { +int TextPainter::stringWidth(StringView s) { + if (s.empty()) + return 0; + String font = m_renderSettings.font, setFont = font; m_fontTextureGroup.switchFont(font); + int width = 0; - bool escape = false; - String escapeCode; - for (String::Char c : Text::preprocessEscapeCodes(s)) { - if (c == Text::StartEsc) - escape = true; + Text::CommandsCallback commandsCallback = [&](StringView commands) { + commands.forEachSplitView(",", [&](StringView command, size_t, size_t) { + if (command == "reset") + m_fontTextureGroup.switchFont(font = setFont); + else if (command == "set") + setFont = font; + else if (command.beginsWith("font=")) + m_fontTextureGroup.switchFont(font = command.substr(5)); + }); + return true; + }; - if (!escape) + Text::TextCallback textCallback = [&](StringView text) { + for (String::Char c : text) width += glyphWidth(c); - else if (c == Text::EndEsc) { - auto commands = escapeCode.split(','); - for (auto& command : commands) { - if (command == "reset") - m_fontTextureGroup.switchFont(font = setFont); - else if (command == "set") - setFont = font; - else if (command.beginsWith("font=")) - m_fontTextureGroup.switchFont(font = command.substr(5)); - } - escape = false; - escapeCode = ""; - } - if (escape && (c != Text::StartEsc)) - escapeCode.append(c); - } + + return true; + }; + + Text::processText(s, textCallback, commandsCallback); return width; } -StringList TextPainter::wrapText(String const& s, Maybe<unsigned> wrapWidth) { +void TextPainter::processWrapText(StringView s, Maybe<unsigned> wrapWidth, WrapTextCallback textFunc, WrapCommandsCallback commandsFunc, bool includeCommandSides) { String font = m_renderSettings.font, setFont = font; m_fontTextureGroup.switchFont(font); - String text = Text::preprocessEscapeCodes(s); - unsigned lineStart = 0; // Where does this line start ? - unsigned lineCharSize = 0; // how many characters in this line ? unsigned linePixelWidth = 0; // How wide is this line so far - bool inEscapeSequence = false; - String escapeCode; + int lines = 0; + + StringView splitIgnore(m_splitIgnore); + StringView splitForce(m_splitForce); + + Text::CommandsCallback commandsCallback = [&](StringView commands) { + StringView inner = commands.utf8().substr(1, commands.utf8Size() - 1); + inner.forEachSplitView(",", [&](StringView command, size_t, size_t) { + if (command == "reset") + m_fontTextureGroup.switchFont(font = setFont); + else if (command == "set") + setFont = font; + else if (command.beginsWith("font=")) + m_fontTextureGroup.switchFont(font = command.substr(5)); + }); + if (commandsFunc) + if (!commandsFunc(includeCommandSides ? commands : inner)) + return false; + + return true; + }; - unsigned splitPos = 0; // Where did we last see a place to split the string ? - unsigned splitWidth = 0; // How wide was the string there ? - - StringList lines; // list of renderable string lines - - // loop through every character in the string - - for (auto character : text) { - // this up here to deal with the (common) occurance that the first charcter - // is an escape initiator - if (character == Text::StartEsc) - inEscapeSequence = true; - - if (inEscapeSequence) { - lineCharSize++; // just jump straight to the next character, we don't care what it is. - if (character == Text::EndEsc) { - auto commands = escapeCode.split(','); - for (auto& command : commands) { - if (command == "reset") - m_fontTextureGroup.switchFont(font = setFont); - else if (command == "set") - setFont = font; - else if (command.beginsWith("font=")) - m_fontTextureGroup.switchFont(font = command.substr(5)); - } - inEscapeSequence = false; - escapeCode = ""; - } - if (character != Text::StartEsc) - escapeCode.append(character); - } else { + Text::TextCallback textCallback = [&](StringView text) { + unsigned lineCharSize = 0; // how many characters in this line ? + unsigned lineStart = 0; // Where does this line start ? + unsigned splitPos = 0; // Where did we last see a place to split the string ? + unsigned splitWidth = 0; // How wide was the string there ? + + for (auto character : text) { lineCharSize++; // assume at least one character if we get here. // is this a linefeed / cr / whatever that forces a line split ? - if (m_splitForce.find(String(character)) != NPos) { + if (splitForce.find(character) != NPos) { // knock one off the end because we don't render the CR - lines.push_back(text.substr(lineStart, lineCharSize - 1)); + if (!textFunc(text.substr(lineStart, lineCharSize - 1), lines++)) + return false; lineStart += lineCharSize; // next line starts after the CR lineCharSize = 0; // with no characters in it. @@ -226,7 +260,7 @@ StringList TextPainter::wrapText(String const& s, Maybe<unsigned> wrapWidth) { int charWidth = glyphWidth(character); // is it a place where we might want to split the line ? - if (m_splitIgnore.find(String(character)) != NPos) { + if (splitIgnore.find(character) != NPos) { splitPos = lineStart + lineCharSize; // this is the character after the space. splitWidth = linePixelWidth + charWidth; // the width of the string at // the split point, i.e. after the space. @@ -236,7 +270,8 @@ StringList TextPainter::wrapText(String const& s, Maybe<unsigned> wrapWidth) { if (wrapWidth && (linePixelWidth + charWidth) > *wrapWidth) { // did we find somewhere to split the line ? if (splitPos) { - lines.push_back(text.substr(lineStart, (splitPos - lineStart) - 1)); + if (!textFunc(text.substr(lineStart, (splitPos - lineStart) - 1), lines++)) + return false; unsigned stringEnd = lineStart + lineCharSize; lineCharSize = stringEnd - splitPos; // next line has the characters after the space. @@ -247,12 +282,12 @@ StringList TextPainter::wrapText(String const& s, Maybe<unsigned> wrapWidth) { lineStart = splitPos; // next line starts after the space splitPos = 0; // split is used up. } else { - // don't draw the last character that puts us over the edge - lines.push_back(text.substr(lineStart, lineCharSize - 1)); + if (!textFunc(text.substr(lineStart, lineCharSize - 1), lines++)) + return false; lineStart += lineCharSize - 1; // skip back by one to include that - // character on the next line. - lineCharSize = 1; // next line has that character in + // character on the next line. + lineCharSize = 1; // next line has that character in linePixelWidth = charWidth; // and is as wide as that character } } else { @@ -260,15 +295,85 @@ StringList TextPainter::wrapText(String const& s, Maybe<unsigned> wrapWidth) { } } } - } - // if we hit the end of the string before hitting the end of the line. - if (lineCharSize > 0) - lines.push_back(text.substr(lineStart, lineCharSize)); + // if we hit the end of the string before hitting the end of the line. + if (lineCharSize > 0 && !textFunc(text.substr(lineStart, lineCharSize), lines)) + return false; - return lines; + return true; + }; + + Text::processText(s, textCallback, commandsCallback, true); } +List<StringView> TextPainter::wrapTextViews(StringView s, Maybe<unsigned> wrapWidth) { + List<StringView> views = {}; + + bool active = false; + StringView current; + int lastLine = 0; + + auto addText = [&active, ¤t](StringView text) { + // Merge views if they are adjacent + if (active && current.utf8Ptr() + current.utf8Size() == text.utf8Ptr()) + current = StringView(current.utf8Ptr(), current.utf8Size() + text.utf8Size()); + else + current = text; + active = true; + }; + + TextPainter::WrapTextCallback textCallback = [&](StringView text, int line) { + if (lastLine != line) { + views.push_back(current); + lastLine = line; + active = false; + } + + addText(text); + return true; + }; + + TextPainter::WrapCommandsCallback commandsCallback = [&](StringView commands) { + addText(commands); + return true; + }; + + processWrapText(s, wrapWidth, textCallback, commandsCallback, true); + + if (active) + views.push_back(current); + + return views; +} + +StringList TextPainter::wrapText(StringView s, Maybe<unsigned> wrapWidth) { + StringList result; + + String current; + int lastLine = 0; + TextPainter::WrapTextCallback textCallback = [&](StringView text, int line) { + if (lastLine != line) { + result.append(move(current)); + lastLine = line; + } + + current += text; + return true; + }; + + TextPainter::WrapCommandsCallback commandsCallback = [&](StringView commands) { + current += commands; + return true; + }; + + processWrapText(s, wrapWidth, textCallback, commandsCallback, true); + + if (!current.empty()) + result.append(move(current)); + + return result; +}; + unsigned TextPainter::fontSize() const { return m_fontSize; } @@ -325,9 +430,8 @@ void TextPainter::cleanup(int64_t timeout) { m_fontTextureGroup.cleanup(timeout); } -void TextPainter::applyCommands(String const& unsplitCommands) { - auto commands = unsplitCommands.split(','); - for (auto& command : commands) { +void TextPainter::applyCommands(StringView unsplitCommands) { + unsplitCommands.forEachSplitView(",", [&](StringView command, size_t, size_t) { try { if (command == "reset") { m_renderSettings = m_savedRenderSettings; @@ -345,19 +449,22 @@ void TextPainter::applyCommands(String const& unsplitCommands) { m_renderSettings.directives = command.substr(11); } else { // expects both #... sequences and plain old color names. - Color c = jsonToColor(command); + Color c = Color(command); c.setAlphaF(c.alphaF() * ((float)m_savedRenderSettings.color[3]) / 255); m_renderSettings.color = c.toRgba(); } } catch (JsonException&) { } catch (ColorException&) { } - } + }); } -RectF TextPainter::doRenderText(String const& s, TextPositioning const& position, bool reallyRender, unsigned* charLimit) { +RectF TextPainter::doRenderText(StringView s, TextPositioning const& position, bool reallyRender, unsigned* charLimit) { Vec2F pos = position.pos; - StringList lines = wrapText(s, position.wrapWidth); + if (s.empty()) + return RectF(pos, pos); + + List<StringView> lines = wrapTextViews(s, position.wrapWidth); int height = (lines.size() - 1) * m_lineSpacing * m_fontSize + m_fontSize; @@ -370,7 +477,7 @@ RectF TextPainter::doRenderText(String const& s, TextPositioning const& position pos[1] += (height - m_fontSize) / 2; RectF bounds = RectF::withSize(pos, Vec2F()); - for (auto i : lines) { + for (auto& i : lines) { bounds.combine(doRenderLine(i, { pos, position.hAnchor, position.vAnchor }, reallyRender, charLimit)); pos[1] -= m_fontSize * m_lineSpacing; @@ -383,53 +490,47 @@ RectF TextPainter::doRenderText(String const& s, TextPositioning const& position return bounds; } -RectF TextPainter::doRenderLine(String const& s, TextPositioning const& position, bool reallyRender, unsigned* charLimit) { +RectF TextPainter::doRenderLine(StringView text, TextPositioning const& position, bool reallyRender, unsigned* charLimit) { if (m_reloadTracker->pullTriggered()) reloadFonts(); - String text = s; TextPositioning pos = position; if (pos.hAnchor == HorizontalAnchor::RightAnchor) { - auto trimmedString = s; - if (charLimit) - trimmedString = s.slice(0, *charLimit); + StringView trimmedString = charLimit ? text.substr(0, *charLimit) : text; pos.pos[0] -= stringWidth(trimmedString); pos.hAnchor = HorizontalAnchor::LeftAnchor; } else if (pos.hAnchor == HorizontalAnchor::HMidAnchor) { - auto trimmedString = s; - if (charLimit) - trimmedString = s.slice(0, *charLimit); - unsigned width = stringWidth(trimmedString); - pos.pos[0] -= std::floor(width / 2); + StringView trimmedString = charLimit ? text.substr(0, *charLimit) : text; + pos.pos[0] -= std::floorf((float)stringWidth(trimmedString) / 2); pos.hAnchor = HorizontalAnchor::LeftAnchor; } bool escape = false; String escapeCode; RectF bounds = RectF::withSize(pos.pos, Vec2F()); - for (String::Char c : text) { - if (c == Text::StartEsc) - escape = true; - - if (!escape) { + Text::TextCallback textCallback = [&](StringView text) { + for (String::Char c : text) { if (charLimit) { if (*charLimit == 0) - break; + return false; else - --*charLimit; + --* charLimit; } + RectF glyphBounds = doRenderGlyph(c, pos, reallyRender); bounds.combine(glyphBounds); pos.pos[0] += glyphBounds.width(); - } else if (c == Text::EndEsc) { - applyCommands(escapeCode); - escape = false; - escapeCode = ""; } - if (escape && (c != Text::StartEsc)) - escapeCode.append(c); - } + return true; + }; + + Text::CommandsCallback commandsCallback = [&](StringView commands) { + applyCommands(commands); + return true; + }; + + Text::processText(text, textCallback, commandsCallback); return bounds; } @@ -444,11 +545,11 @@ RectF TextPainter::doRenderGlyph(String::Char c, TextPositioning const& position if (position.hAnchor == HorizontalAnchor::RightAnchor) hOffset = -width; else if (position.hAnchor == HorizontalAnchor::HMidAnchor) - hOffset = -std::floor(width / 2); + hOffset = -std::floorf((float)width / 2); float vOffset = 0; if (position.vAnchor == VerticalAnchor::VMidAnchor) - vOffset = -std::floor((float)m_fontSize / 2); + vOffset = -std::floorf((float)m_fontSize / 2); else if (position.vAnchor == VerticalAnchor::TopAnchor) vOffset = -(float)m_fontSize; |